## Changelog

### Tomcat 9.0.108 (remm)

#### Catalina

- Fix bloom filter population for archive indexing when using a packed WAR containing one or more JAR files. (markt)

#### Coyote

- 69748: Add missing call to set keep-alive timeout when using HTTP/1.1 following an async request, which was present for AJP. (remm/markt)
- 69762: Fix possible overflow during HPACK decoding of integers. Note that the maximum permitted value of an HPACK decoded integer is `Integer.MAX_VALUE`. (markt)
- Update the HTTP/2 overhead documentation - particularly the code comments - to reflect the deprecation of the `PRIORITY` frame and clarify that a stream reset always triggers an overhead increase. (markt)

#### Cluster

- Add `enableStatistics` configuration attribute for the `DeltaManager`, defaulting to `true`. (remm)

#### Web applications

- Manager and Host Manager. Provide the Manager and Host Manager web applications with a dedicated favicon file rather than using the one from the ROOT web application which might not be present or may represent something entirely different. Pull requests #876 and #878 by Simon Arame.

#### Other

- Update Checkstyle to 10.26.1. (markt)
- Improvements to French translations. (remm)
- Improvements to Japanese translations by tak7iji. (markt)

### 2025-07-04 Tomcat 9.0.107 (remm)

#### Catalina

- Ensure application configured welcome files override the defaults when configuring an embedded web application programmatically. (markt)
- Allow the default servlet to set the content length when the content length is known, no content has been written and a `Writer` is being used. (markt)
- 69717: Correct a regression in the fix for CVE-2025-49125 that prevented access to PreResources and PostResources when mounted below the web application root with a path that was terminated with a file separator. (remm/markt)
- 69731: Fix an issue that meant that the value of `maxParameterCount` applied was smaller than intended for multipart uploads with non-file parts when the parts were processed before query string parameters. (markt)
- Align size tracking for multipart requests with FileUpload's use of `long`. (schultz)

#### Coyote

- 69710: Increase the default for `maxPartCount` from `10` to `50`. Update the documentation to provide more details on the memory requirements to support multi-part uploads while avoiding a denial of service risk. (markt)
- 69713: Correctly handle an HTTP/2 data frame that includes padding when the headers include a content-length. (remm/markt)
- Correctly collect statistics for HTTP/2 requests and avoid counting one request multiple times. Based on pull request #868 by qingdaoheze. (markt)
- Fix JMX value for `keepAliveCount` on the endpoint. Also add the value of `useVirtualThreads` in JMX. (remm)
- Improve stability of APR/native connector. (markt)
- 69728: Remove incorrect warning when HTTP/2 is used with optional certificate verification and improve the warnings when a web application tries to use CLIENT-CERT with either HTTP/2 or a JSSE implementation of TLS 1.3. (markt)
- When setting the initial HTTP/2 connection limit, apply those limits earlier. (markt)

#### Jasper

- Remove `IMPL_OBJ_START` from EL grammar for `IDENTIFIER`. (markt)
- Remove the `INSTANCEOF` and `FUNCTIONSUFFIX` definitions from the EL grammar as both are unused. (markt)

#### Web applications

- Documentation. Provide more explicit guidance regarding the security considerations for enabling write access to the web application via WebDAV, HTTP PUT requests or similar. (markt)
- Documentation. Add a section on reverse proxies to the security considerations page. (markt)

#### Other

- Update UnboundID to 7.0.3. (markt)
- Update Checkstyle to 10.25.1. (markt)
- Improvements to French translations. (remm)
- Improvements to Japanese translations provided by tak7iji. (markt)

### 2025-06-10 Tomcat 9.0.106 (remm)

#### Catalina

- Add support for the `java:module` namespace which mirrors the `java:comp` namespace. (markt)
- Support parsing of multiple path parameters separated by `;` in a single URL segment. Based on pull request #860 by Chenjp. (markt)
- Added support for limiting the number of parameters in HTTP requests through the new `ParameterLimitValve`. The valve allows configurable URL-specific limits on the number of parameters. (dsoumis)
- 69699: Encode redirect URL used by the rewrite valve with the session id if appropriate, and handle cross context with different session configuration when using rewrite. (remm)
- #863: Add support for comments at the end of lines in text rewrite map files to align behaviour with Apache httpd. Pull request provided by Chenjp. (markt)
- 69706: Fix saved request serialization issue in FORM introduced when allowing infinite session timeouts. (remm)
- Expand the path checks for Pre-Resources and Post-Resources mounted at a path within the web application. (markt)

#### Coyote

- #861: Refactor `TaskQueue` to use the new interface `RetryableQueue` which enables better integration of custom `Executor`s which provide their own `BlockingQueue` implementation. Pull request provided by Paulo Almeida. (markt)
- Provide finer grained control of multi-part request processing via two new attributes on the `Connector` element. `maxPartCount` limits the total number of parts in a multi-part request and `maxPartHeaderSize` limits the size of the headers provided with each part. Add support for these new attributes to the `ParameterLimitValve`. (markt)

#### Jasper

- 69696: Mark the JSP wrapper for reload after a failed compilation. (remm)

#### Web applications

- 69694: Improve error reporting of deployment tasks done using the manager webapp when a copy operation fails. (remm)

#### Other

- Add thread name to webappClassLoader.stackTraceRequestThread message. Patch provided by Felix Zhang. (schultz)
- Update the internal fork of Apache Commons FileUpload to 1.6.0 (2025-06-05). (markt)
- Update EasyMock to 5.6.0. (markt)
- Update Checkstyle to 10.25.0. (markt)
- #858: Extend improvements to CVE-2024-56337 protection to `service.bat`. Pull request provided by Markus Hoffrogge. (markt)
- Use the full path when the installer for Windows sets calls `icacls.exe` to set file permissions. (markt)
- Improvements to Japanese translations provided by tak7iji. (markt)

### 2025-05-13 Tomcat 9.0.105 (remm)

#### Catalina

- 69588: Enable `allowLinking` to be set on `PreResources`, `JarResources` and `PostResources`. If not set explicitly, the setting will be inherited from the `Resources`. (markt)
- 69633: Add support for Filters using context root mappings. (markt)
- #843: Fix off by one validation logic for partial PUT ranges and associated test case. Submitted by Chenjp. (remm)
- Replace the unused buffer in `org.apache.catalina.connector.InputBuffer` with a static, zero length buffer. (markt)
- Refactor GCI servlet to access resources via the `WebResource` API. (markt)
- 69662: Report name in exception message when a naming lookup failure occurs. Based on code submitted by Donald Smith. (remm)
- Ensure that the FORM authentication attribute `authenticationSessionTimeout` works correctly when sessions have an infinite timeout when authentication starts. (markt)
- Provide a content type based on file extension when web application resources are accessed via a URL. (markt)

#### Coyote

- Refactor the `SavedRequestInputFilter` so the buffered data is used directly rather than copied. (markt)

#### Jasper

- 69635: Add support to `javax.el.ImportHandler` for resolving inner classes. (markt)
- #842Add support for optimized execution of c:set and c:remove tags, when activated via JSP servlet param useNonstandardTagOptimizations. (jengebr)
- Fix an edge case compilation bug for JSP and tag files on case insensitive file systems that was exposed by the test case for 69635. (markt)

#### Web applications

- 68876: Documentation. Update the UML diagrams for server start-up, request processing and authentication using PlantUML and include the source files for each diagram. (markt)

#### Other

- Update Jacoco to 0.8.13. (remm)
- Explicitly set the locale to be used for Javadoc. For official releases, this locale will be English (US) to support reproducible builds.
- Update Byte Buddy to 1.17.5. (markt)
- Update Checkstyle to 10.23.1. (markt)
- Update file extension to media type mappings to align with the current list used by the Apache Web Server (httpd). (markt)
- Improvements to French translations. (remm)
- Improvements to Japanese translations provided by tak7iji. (markt)

### 2025-04-09 Tomcat 9.0.104 (remm)

#### Catalina

- Fix use of `SSS` in `SimpleDateFormat` pattern for `AccessLogValve`. (rjung)
- Process possible path parameters rewrite production in the rewrite valve. (remm)
- 69643: Optimize directory listing for large amount of files. Patch submitted by Loic de l'Eprevier. (remm)

#### Other

- Set `sun.io.useCanonCaches` in `service.bat` Based on pull request #841 by Paul Lodge. (remm)
- The minimum Java version to build a release is now Java 22, mirroring Tomcat 10.1. This removes the need for using a `java-ffm.home` property. (remm)

### not released Tomcat 9.0.103 (remm)

#### Catalina

- Return 400 if the amount of content sent for a partial PUT is inconsistent with the range that was specified. (remm)
- Add a new `RateLimiter` implementation, `org.apache.catalina.util.ExactRateLimiter`, that can be used with `org.apache.catalina.filters.RateLimitFilter` to provide rate limit based on the exact values configured. Based on pull request #794 by Chenjp. (markt)
- Fix parsing of the `time-taken` token in the `ExtendedAccessLogValve`. (remm)
- Fix invocation of the FFM OpenSSL code for setting a SSL engine and FIPS mode. (remm)
- 69600: Add IPv6 local addresses (RFC 4193 and RFC 4291) to the default internal proxies for the RemoteIpFilter and RemoteIpValve. (markt)
- 69615: Improve integration with the not found class resources cache for users who are using a custom web application class loader and/or using reflection to dynamically add external repositories to the web application class loader. (markt)
- Add a new initialisation parameter to the Default servlet - `allowPostAsGet` - which controls whether a direct request (i.e. not a forward or an include) for a static resource using the POST method will be processed as if the GET method had been used. If not allowed, the request will be rejected. The default behaviour of processing the request as if the GET method had been used is unchanged. (markt)
- 69623: Correct a long standing regression that meant that calls to `ClassLoader.getResource().getContent()` failed when made from within a web application with resource caching enabled. (markt)
- 69634: Avoid NPE on `JsonErrorReportValve`. (remm)
- Add missing `throwable` stack trace to `JsonErrorReportValve` equivalent to the one from `ErrorReportValve`. (remm)
- Improve the handling of `%nn` URL encoding in the RewriteValve and document how `%nn` URL encoding may be used with rewrite rules. (markt)
- Fix a potential exception when calling `WebappClassLoaderBase.getResource("")`. (markt)

#### Coyote

- 69607: Allow failed initialization of MD5. Based on code submitted by Shivam Verma. (remm)
- 69614: HTTP/2 priority frames with an invalid priority field value should be ignored. (markt)
- Improve handling of unexpected errors during HTTP/2 processing. (markt)
- Add missing code to process an OpenSSL profile, such as `PROFILE=SYSTEM`, using FFM. (remm)
- Simplify the process of using a custom SSLContext for an HTTPS enabled connector. Based on pull request #805 by Hakky54. (markt)

#### Jasper

- Replace custom URL encoding provided by the JSP runtime library with calls to `java.net.URLEncoder.encode()`. (markt)
- Add compiler using the `Java Compiler` API, supporting exploded web applications. The `compilerClassName` to use is `org.apache.jasper.compiler.JavaCompiler`. (remm)
- Add support for specifying Java 25 (with the value `25`) as the compiler source and/or compiler target for JSP compilation. If used with an Eclipse JDT compiler version that does not support these values, a warning will be logged and the default will be used. (markt)

#### Cluster

- Fix resetting cross context sessions in the `ReplicationValve`. (remm)

#### Web applications

- Documentation. Add a link to the Log4j documentation that describes how to use Log4j rather than JULI for Tomcat's internal logging. (markt)
- Documentation. Document the runtime attributes available to web applications via the Request or the ServletContext. Based on pull request #832 by usmazat. (markt)

#### Other

- Revert JSign to 6.0 to avoid a file locking issue. (markt)
- Update to NSIS 3.11. (markt)
- Update to ByteBuddy 1.17.4. (markt)
- Update to Checkstyle 10.21.4. (markt)
- Update to SpotBugs to 4.9.3. (markt)
- Improvements to French translations. (remm)
- Improvements to Japanese translations provided by tak7iji. (markt)

### 2025-03-06 Tomcat 9.0.102 (remm)

#### Catalina

- Weak etags in the `If-Range` header should not match as strong etags are required. (remm)

### not released Tomcat 9.0.101 (remm)

#### Catalina

- When looking up class loader resources by resource name, the resource name should not start with '/'. If the resource name does start with '/', Tomcat is lenient and looks it up as if the '/' was not present. When the web application class loader was configured with external repositories and names starting with '/' were used for lookups, it was possible that cached 'not found' results could effectively hide lookup results using the correct resource name. (markt)
- Enable the JNDIRealm to validate credentials provided to `HttpServletRequest.login(String username, String password)` when the realm is configured to use GSSAPI authentication. (markt)
- Fix a bug in the JRE compatibility detection that incorrectly identified Java 19 and Java 20 as supporting Java 21 features. (markt)
- Improve the checks for exposure to and protection against CVE-2024-56337 so that reflection is not used unless required. The checks for whether the file system is case sensitive or not have been removed. (markt)
- Avoid scenarios where temporary files used for partial PUT would not be deleted. (remm)
- 69602: Fix regression in releases from 12-2024 that were too strict and rejected weak etags in the `If-Range` header. (remm)

#### Coyote

- 69575: Avoid using compression if a response is already compressed using `compress`, `deflate` or `zstd`. (remm)
- Use `Transfer-Encoding` for compression rather than `Content-Encoding` if the client submits a `TE` header containing `gzip`. (remm)
- Fix a race condition in the handling of HTTP/2 stream reset that could cause unexpected 500 responses. (markt)

#### Cluster

- 69598: Add detection of service account token changes to the `KubernetesMembershipProvider` implementation and reload the token if it changes. Based on a patch by Miroslav Jezbera. (markt)

#### Other

- Add `makensis` as an option for building the Installer for Windows on non-Windows platforms. (rjung/markt)
- Update Byte Buddy to 1.17.1. (markt)
- Update Checkstyle to 10.21.3. (markt)
- Update SpotBugs to 4.9.1. (markt)
- Update JSign to 7.1. (markt)
- Improvements to French translations. (remm)
- Improvements to Japanese translations by tak7iji. (markt)

### 2025-02-17 Tomcat 9.0.100 (remm)

#### Catalina

- 69576: Avoid possible failure initializing `JreCompat` due to uncaught exception introduced for the check for CVE-2024-56337. (remm)

#### Other

- Add `org.apache.juli.JsonFormatter` to format log as one line JSON documents. (remm)

### 2025-02-10 Tomcat 9.0.99 (remm)

#### Catalina

- Add `tableName` configuration on the `DataSourcePropertyStore` that may be used by the WebDAV Servlet. (remm)
- Improve HTTP If headers processing according to RFC 9110. Based on pull request #796 by Chenjp. (remm/markt)
- Allow `readOnly` attribute configuration on the `Resources` element and allow configure the `readOnly` attribute value of the main resources. The attribute value will also be used by the default and WebDAV Servlets. (remm)
- 69285: Optimise the creation of the parameter map for included requests. Based on sample code and test cases provided by John Engebretson. (markt)
- 69527: Avoid rare cases where a cached resource could be set with 0 content length, or could be evicted immediately. (remm)
- Fix possible edge cases (such as HTTP/1.0) with trying to detect requests without body for WebDAV LOCK and PROPFIND. (remm)
- 69528: Add multi-release JAR support for the `bloom` `archiveIndexStrategy` of the `Resources`. (remm)
- Improve checks for `WEB-INF` and `META-INF` in the WebDAV servlet. Based on a patch submitted by Chenjp. (remm)
- Add a check to ensure that, if one or more web applications are potentially vulnerable to CVE-2024-56337, the JVM has been configured to protect against the vulnerability and to configure the JVM correctly if not. Where one or more web applications are potentially vulnerable to CVE-2004-56337 and the JVM cannot be correctly configured or it cannot be confirmed that the JVM has been correctly configured, prevent the impacted web applications from starting. (markt)
- Remove unused session to client map from `CrawlerSessionManagerValve`. Submitted by Brian Matzon. (remm)
- When using the WebDAV servlet with `serveSubpathOnly` set to `true`, ensure that the destination for any requested WebDAV operation is also restricted to the sub-path. (markt)
- Generate an appropriate `Allow` HTTP header when the Default servlet returns a 405 (method not allowed) response in response to a `DELETE` request because the target resource cannot be deleted. Pull request #802 provided by Chenjp. (markt)
- Refactor creation of `RequestDispatcher` instances so that the processing of the provided path is consistent with normal request processing. (markt)
- Add `encodedReverseSolidusHandling` and `encodedSolidusHandling` attributes to Context to provide control over the handling of the path used to created a `RequestDispatcher`. (markt)
- Handle a potential `NullPointerException` after an `IOException` occurs on a non-container thread during asynchronous processing. (markt)
- Enhance lifecycle of temporary files used by partial PUT. (remm)

#### Coyote

- Don't log warnings for registered HTTP/2 settings that Tomcat does not support. These settings are now silently ignored. (markt)
- Avoid a rare `NullPointerException` when recycling the `Http11InputBuffer`. (markt)
- Lower the log level to debug for logging an invalid socket channel when processing poller events for the NIO Connector as this may occur in normal usage. (markt)
- Clean-up references to the HTTP/2 stream once request processing has completed to aid GC and reduce the size of the HTTP/2 recycled request and response cache. (markt)
- Add a new Connector configuration attribute, `encodedReverseSolidusHandling`, to control how `%5c` sequences in URLs are handled. The default behaviour is unchanged (decode) keeping in mind that the allowBackslash attribute determines how the decoded URI is processed. (markt)
- 69545: Improve CRLF skipping for the `available` method of the `ChunkedInputFilter`. (remm)
- Improve the performance of repeated calls to `getHeader()`. Pull request #813 provided by Adwait Kumar Singh. (markt)
- 69559: Ensure that the Java 24 warning regarding the use of `sun.misc.Unsafe::invokeCleaner` is only reported by the JRE when the code will be used. (markt)

#### Jasper

- 69508: Correct a regression in the fix for 69382 that broke JSP include actions if both the page attribute and the body contained parameters. Pull request #803 provided by Chenjp. (markt)
- 69521: Update the EL Parser to allow the full range of valid characters in an EL identifier as defined by the Java Language Specification. (markt)
- 69532: Optimise the creation of `ExpressionFactory` instances. Patch provided by John Engebretson. (markt)

#### Web applications

- Documentation. Expand the description of the security implications of setting `mapperContextRootRedirectEnabled` and/or `mapperDirectoryRedirectEnabled` to `true`. (markt)
- Documentation. Better document the default for the `truststoreProvider` attribute of a `SSLHostConfig` element. (markt)

#### Other

- Update to Commons Daemon 1.4.1. (markt)
- Update the internal fork of Commons Pool to 2.12.1. (markt)
- Update Byte Buddy to 1.16.1. (markt)
- Update UnboundID to 7.0.2. (markt)
- Update Checkstyle to 10.21.2. (markt)
- Update SpotBugs to 4.9.0. (markt)
- Improvements to French translations. (remm)
- Improvements to Chinese translations by leeyazhou. (markt)
- Improvements to Japanese translations by tak7iji. (markt)

### 2024-12-09 Tomcat 9.0.98 (remm)

#### Catalina

- Add option to serve resources from subpath only with WebDAV Servlet like with DefaultServlet. (michaelo)
- Add special handling for the `protocols` attribute of `SSLHostConfig` in storeconfig. (remm)
- 69442: Fix case sensitive check on `content-type` when parsing request parameters. (remm)
- Refactor duplicate code for extracting media type and subtype from `content-type` into a single method. (markt)
- Compatibility of generated embedded code with components where constructors or property related methods throw a checked exception. (remm)
- The previous fix for inconsistent resource metadata during concurrent reads and writes was incomplete. (markt)
- 69444: Ensure that the `javax.servlet.error.message` request attribute is set when an application defined error page is called. (markt)
- Avoid quotes for numeric values in the JSON generated by the status servlet. (remm)
- Add strong ETag support for the WebDAV and default servlet, which can be enabled by using the `useStrongETags` init parameter with a value set to `true`. The ETag generated will be a SHA-1 checksum of the resource content. (remm)
- Use client locale for directory listings. (remm)
- 69439: Improve the handling of multiple `Cache-Control` headers in the `ExpiresFilter`. Based on pull request #777 by Chenjp. (markt)
- 69447: Update the support for caching classes the web application class loader cannot find to take account of classes loaded from external repositories. Prior to this fix, these classes could be incorrectly marked as not found. (markt)
- 69466: Rework handling of HEAD requests. Headers explicitly set by users will not be removed and any header present in a HEAD request will also be present in the equivalent GET request. There may be some headers, as per RFC 9110, section 9.3.2, that are present in a GET request that are not present in the equivalent HEAD request. (markt)
- 69471: Log instances of `CloseNowException` caught by `ApplicationDispatcher.invoke()` at debug level rather than error level as they are very likely to have been caused by a client disconnection or similar I/O issue. (markt)
- Add a test case for the fix for 69442. Also refactor references to `application/x-www-form-urlencoded`. Based on pull request #779 by Chenjp. (markt)
- 69476: Catch possible ISE when trying to report PUT failure in the `DefaultServlet`. (remm)
- Add support for RateLimit header fields for HTTP (draft) in the `RateLimitFilter`. Based on pull request #775 provided by Chenjp. (markt)
- #787: Add regression tests for 69478. Pull request provided by Thomas Krisch. (markt)
- The default servlet now rejects HTTP range requests when two or more of the requested ranges overlap. Based on pull request #782 provided by Chenjp. (markt)
- Enhance Content-Range verification for partial PUT requests handled by the default servlet. Provided by Chenjp in pull request #778. (markt)
- Harmonize `DataSourceStore` lookup in the global resources to optionally avoid the `comp/env` prefix which is usually not used there. (remm)
- As required by RFC 9110, the HTTP `Range` header will now only be processed for `GET` requests. Based on pull request #790 provided by Chenjp. (markt)
- Deprecate the `useAcceptRanges` initialisation parameter for the default servlet. It will be removed in Tomcat 12 onwards where it will effectively be hard coded to `true`. (markt)
- Add `DataSource` based property storage for the `WebdavServlet`. (remm)

#### Coyote

- Align `encodedSolidusHandling` with the Servlet specification. If the pass-through mode is used, any `%25` sequences will now also be passed through to avoid errors and/or corruption when the application decodes the path. (markt)

#### Jasper

- Further optimise EL evaluation of method parameters. Patch provided by Paolo B. (markt)
- Follow-up to the fix for 69381. Apply the optimisation for method lookup performance in expression language to an additional location. (markt)

#### Web applications

- Documentation. Remove references to the `ResourceParams` element. Support for `ResourceParams` was removed in Tomcat 5.5.x. (markt)
- Documentation. 69477: Correct name of attribute for `RemoteIPFilter`. The attribute is `internalProxies` rather than `allowedInternalProxies`. Pull request #786 provided by Jorge Díaz. (markt)
- Examples. Fix broken links when Servlet Request Info example is called via a URL that includes a pathInfo component. (markt)
- Examples. Expand the obfuscation of session cookie values in the request header example to JSON responses. (markt)
- Examples. Add the ability to delete session attributes in the servlet session example. (markt)
- Examples. Add a hard coded limit of 10 attributes per session for the servlet session example. (markt)
- Examples. Add the ability to delete session attributes and add a hard coded limit of 10 attributes per session for the JSP form authentication example. (markt)
- Examples. Limit the shopping cart example to only allow adding the pre-defined items to the cart. (markt)
- Examples. Remove JSP calendar example. (markt)

#### Other

- 69465: Fix warnings during native image compilation using the Tomcat embedded JARs. (markt)
- Update Tomcat's fork of Commons DBCP to 2.13.0. (markt)
- Update EasyMock to 5.5.0. (markt)
- Update Checkstyle to 10.20.2. (markt)
- Update BND to 7.1.0. (markt)
- Improvements to French translations. (remm)
- Improvements to Korean translations. (markt)
- Improvements to Chinese translations. (markt)
- Improvements to Japanese translations by tak7iji. (markt)

### 2024-11-09 Tomcat 9.0.97 (remm)

#### Catalina

- Add support for the new Servlet API method `HttpServletResponse.sendEarlyHints()`. (markt)
- 55470: Add debug logging that reports the class path when a `ClassNotFoundException` occurs in the digester or the web application class loader. Based on a patch by Ralf Hauser. (markt)
- 69374: Properly separate between table header and body in `DefaultServlet`'s listing. (michaelo)
- 69373: Make `DefaultServlet`'s HTML listing file last modified rendering better (flexible). (michaelo)
- Improve HTML output of `DefaultServlet`. (michaelo)
- Refactor `RateLimitFilter` to use `FilterBase` as the base class. The primary advantage for doing this is less code to process `init-param` values. (markt)
- 69370: `DefaultServlet`'s HTML listing uses incorrect labels. (michaelo)
- Avoid NPE in `CrawlerSessionManagerValve` for partially mapped requests. (remm)
- Add missing WebDAV `Lock-Token` header in the response when locking a folder. (remm)
- Invalid WebDAV lock requests should be rejected with 400. (remm)
- Fix regression in WebDAV when attempting to unlock a collection. (remm)
- Verify that destination is not locked for a WebDAV copy operation. (remm)
- Send 415 response to WebDAV `MKCOL` operations that include a request body since this is optional and unsupported. (remm)
- Enforce `DAV:` namespace on WebDAV XML elements. (remm)
- Do not allow a new WebDAV lock on a child resource if a parent collection is locked (RFC 4918 section 6.1). (remm)
- WebDAV `DELETE` should remove any existing lock on successfully deleted resources. (remm)
- Remove WebDAV lock null support in accordance with RFC 4918 section 7.3 and annex D. Instead a lock on a non existing resource will create an empty file locked with a regular lock. (remm)
- Rewrite implementation of WebDAV shared locks to comply with RFC 4918. (remm)
- Implement WebDAV `If` header using code from the Apache Jackrabbit project. (remm)
- Add `PropertyStore` interface in the WebDAV Servlet, to allow implementation of dead properties storage. The store used can be configured using the `propertyStore` init parameter of the WebDAV servlet by specifying the class name of the store. A simple non persistent implementation is used if no custom store is configured. (remm)
- Implement WebDAV `PROPPATCH` method using the newly added `PropertyStore`, and update `PROPFIND` to support it. (remm)
- Cache not found results when searching for web application class loader resources. This addresses performance problems caused by components such as `java.sql.DriverManager` which, in some circumstances, will search for the same class repeatedly. In a large web application this can cause performance problems. The size of the cache can be controlled via the new `notFoundClassResourceCacheSize` on the StandardContext. (markt)
- Stop after `INITIALIZED` state should be a noop since it is possible for subcomponents to be in `FAILED` after init. (remm)
- Fix incorrect web resource cache size calculations when there are concurrent `PUT` and `DELETE` requests for the same resource. (markt)
- Add debug logging for the web resource cache so the current size can be tracked as resources are added and removed. (markt)
- Replace legacy WebDAV `opaquelocktoken:` scheme for lock tokens with `urn:uuid:` as recommended by RFC 4918, and remove `secret` init parameter. (remm)
- Concurrent reads and writes (e.g. `GET` and `PUT` / `DELETE`) for the same path caused corruption of the `FileResource` where some of the fields were set as if the file exists and some were set as if it does not. This resulted in inconsistent metadata. (markt)
- 69415: Ensure that the `ExpiresFilter` only sets cache headers on `GET` and `HEAD` requests. Also skip requests where the application has set `Cache-Control: no-store`. (markt)
- 69419: Improve the performance of `ServletRequest.getAttribute()` when there are multiple levels of nested includes. Based on a patch provided by John Engebretson. (markt)
- All applications to send an early hints informational response by calling `HttpServletResponse.sendError()` with a status code of 103. (schultz)

#### Coyote

- Return null SSL session id on zero length byte array returned from the SSL implementation. (remm)
- Skip OpenSSLConf with BoringSSL since it is unsupported. (remm)
- Create the `HttpParser` in `Http11Processor` if it is not present on the `AbstractHttp11Protocol` to provide better lifecycle robustness for regular HTTP/1.1. The new behavior was introduced on a previous refactoring to improve HTTP/2 performance. (remm)
- `OpenSSLContext` will now throw a `KeyManagementException` if something is known to have gone wrong in the `init` method, which is the behavior documented by `javax.net.ssl.SSLContext.init`. This makes error handling more consistent. (remm)

#### Jasper

- Add back tag release method as deprecated in the runtime for compat with old generated code. (remm)
- 69399: Fix regression caused by the improvement 69333 which caused the tag `release` to be called when using tag pooling, and to be skipped when not using it. Patch submitted by Michal Sobkiewicz. (remm)
- 69381: Improve method lookup performance in expression language. When the required method has no arguments there is no need to consider casting or coercion and the method lookup process can be simplified. Based on pull request #770 by John Engebretson. (markt)
- 69382: Improve the performance of the JSP include action by re-using results of relatively expensive method calls in the generated code rather than repeating them. Patch provided by John Engebretson. (markt)
- 69398: Avoid unnecessary object allocation in `PageContextImpl`. Based on a suggestion by John Engebretson. (markt)
- 69406: When using `StringInterpreterEnum`, do not throw an `IllegalArgumentException` when an invalid `Enum` is encountered. Instead, resolve the value at runtime. Patch provided by John Engebretson. (markt)
- 69429: Optimise EL evaluation of method parameters for methods that do not accept any parameters. Patch provided by John Engebretson. (markt)

#### Other

- Switch from DigiCert ONE to ssl.com eSigner for code signing. (markt)
- Update Byte Buddy to 1.15.10. (markt)
- Update CheckStyle to 10.20.0. (markt)
- Improvements to German translations. (remm)

### 2024-10-08 Tomcat 9.0.96 (remm)

#### Catalina

- Ensure that the Jakarta Authentication `CallbackHandler` only creates one `GenericPrincipal` in the `Subject`. (markt)
- If the Jakarta Authentication process fails with an Exception, explicitly set the HTTP response status to 500 as the `ServerAuthContext` may not have set it. (markt)
- When persisting the Jakarta Authentication provider configuration, create any necessary parent directories that don't already exist. (markt)
- Correct the logic used to detect errors when deleting temporary files associated with persisting the Jakarta Authentication provider configuration. (markt)
- When processing Jakarta Authentication callbacks, don't overwrite a Principal obtained from the `PasswordValidationCallback` with `null` if the `CallerPrincipalCallback` does not provide a Principal. (markt)
- Avoid store config backup loss when storing one configuration more than once per second. (remm)
- 69359: `WebdavServlet` duplicates `getRelativePath()` method from super class with incorrect Javadoc. (michaelo)
- 69360: Inconsistent `DELETE` behavior between `WebdavServlet` and `DefaultServlet`. (michaelo)
- Make `WebdavServlet` properly return the `Allow` header when deletion of a resource is not allowed. (michaelo)
- Add log warning if non wildcard mappings are used with the `WebdavServlet`. (remm)
- 69361: Ensure that the order of entires in a multi-status response to a WebDAV is consistent with the order in which resources were processed. (markt)
- 69362: Provide a better multi-status response when deleting a collection via WebDAV fails. Empty directories that cannot be deleted will now be included in the response. (markt)
- 69363: Use `getPathPrefix()` consistently in the WebDAV servlet to ensure that the correct path is used when the WebDAV servlet is mounted at a sub-path within the web application. (markt)

#### Coyote

- 69316: Ensure that `FastHttpDateFormat#getCurrentDate()` (used to generate Date headers for HTTP responses) generates the correct string for the given input. Prior to this change, the output may have wrong by one second in some cases. Pull request #751 provided by Chenjp. (markt)
- Add `server` and `serverRemoveAppProvidedValues` to the list of attributes the HTTP/2 protocol will inherit from the HTTP/1.1 connector it is nested within. (markt)
- Avoid possible crashes when using Apache Tomcat Native, caused by destroying SSLContext objects through GC after APR has been terminated. (remm)
- Improve HTTP/2 handling of trailer fields for requests. Trailer fields no longer need to be recieved before the headers of the subsequent stream nor are trailer fields for an in progress stream swallowed if the Connector is paused before the trailer fields are received. (markt)
- Ensure the request and response are not recycled too soon for an HTTP/2 stream when a stream level error is detected during the processing of incoming HTTP/2 frames. This could lead to incorrect processing times appearing in the access log. (markt)

#### Jasper

- 69333: Remove unnecessary code from generated JSPs. (markt)
- 69338: Improve the performance of processing expressions that include AND or OR operations with more than two operands and expressions that use `not empty`. (markt)
- 69348: Reduce memory consumption in `ELContext` by using lazy initialization for the data structure used to track lambda arguments. (markt)

#### Web applications

- The manager webapp will now be able to access certificates again when OpenSSL is used. (remm)

#### Other

- Update Byte Buddy to 1.15.3. (markt)
- Update CheckStyle to 10.18.2. (markt)
- Improvements to French translations. (remm)
- Improvements to Japanese translations by tak7iji. (markt)
- Improvements to Chinese translations by Ch_jp. (markt)

### 2024-09-17 Tomcat 9.0.95 (remm)

#### Coyote

- Fix 69320, a regression in the fix for 69302 that meant the HTTP/2 processing was likely to be broken for all clients once any client sent an HTTP/2 reset frame. (markt)

### 2024-09-10 Tomcat 9.0.94 (remm)

#### Catalina

- Improve performance of `ApplicationHttpRequest.parseParameters()`. Based on sample code and test cases provided by John Engebretson. (markt)

#### Coyote

- Correct a regression in the fix for non-blocking reads of chunked request bodies that caused `InputStream.available()` to return a non-zero value when there was no data to read. In some circumstances this could cause a blocking read to block waiting for more data rather than return the data it had already received. (markt)
- Add a new attribute `cookiesWithoutEquals` to the `Rfc6265CookieProcessor`. The default behaviour is unchanged. (markt)
- Ensure that Tomcat sends a TLS close_notify message after receiving one from the client when using the `OpenSSLImplementation`. (markt)
- 69301: Fix trailer headers replacing non-trailer headers when writing response headers to the access log. Based on a patch and test case provided by hypnoce. (markt)
- 69302: If an HTTP/2 client resets a stream before the request body is fully written, ensure that any `ReadListener` is notified via a call to `ReadListener.onErrror()`. (markt)

#### Jasper

- Switch the `TldScanner` back to logging detailed scan results at debug level rather than trace level. (markt)

#### WebSocket

- If a blocking message write exceeds the timeout, don't attempt the write again before throwing the exception. (markt)
- An EncodeException being thrown during a message write should not automatically cause the connection to close. The application should handle the exception and make the decision whether or not to close the connection. (markt)

#### Web applications

- Documentation. Align the logging configuration documentation with the current defaults. (markt)

#### jdbc-pool

- 69255: Correct a regression in the fix for 69206 that meant exceptions executing statements were wrapped in an `java.lang.reflect.UndeclaredThrowableException` rather than the application seeing the original `SQLException`. Fixed by pull request #744 provided by Michael Clarke. (markt)
- 69279: Correct a regression in the fix for 69206 that meant that methods that previously returned a `null` `ResultSet` were returning a proxy with a null delegate. Fixed by pull request #745 provided by Huub de Beer. (markt)

#### Other

- Exclude the `tomcat-coyote-ffm.jar` from JAR scanning by default. (markt)
- Change the default log handler level to `ALL` so log messages are not dropped by default if a logger is configured to use trace (`FINEST`) level logging. (markt)
- Update Hamcrest to 3.0. (markt)
- Update EasyMock to 5.4.0. (markt)
- Update Byte Buddy to 1.15.0. (markt)
- Update CheckStyle to 10.18.0. (markt)
- Update the internal fork of Apache Commons BCEL to 6.10.0. (markt)
- Improvements to Spanish translations by Fernando. (markt)
- Improvements to French translations. (remm)
- Improvements to Japanese translations by tak7iji. (markt)

### 2024-08-06 Tomcat 9.0.93 (remm)

#### Coyote

- Correct regressions in the refactoring that added recycling of the coyote request and response to the HTTP/2 processing. (markt)

### not released Tomcat 9.0.92 (remm)

#### Catalina

- Add support for RFC 8297 (Early Hints). Applications can use this feature by casting the `HttpServletResponse` to `org.apache.catalina.connector.Reponse` and then calling the method `void sendEarlyHints()`. This method will be added to the Servlet API (removing the need for the cast) in Servlet 6.2 onwards. (markt)
- 69214: Do not reject a CORS request that uses POST but does not include a `content-type` header. Tomcat now correctly processes this as a simple CORS request. Based on a patch suggested by thebluemountain. (markt)
- Refactor `SpnegoAuthenticator` so it uses `Subject.callAs()` rather than `Subject.doAs()` when the available. (markt)

#### Coyote

- Add OpenSSL integration using the FFM API rather than Tomcat Native. OpenSSL support may be enabled by adding the `org.apache.catalina.core.OpenSSLLifecycleListener` listener on the `Server` element when using Java 22 or later. (remm)
- Ensure that HTTP/2 stream input buffers are only created when there is a request body to be read. (markt)
- Refactor creation of HttpParser instances from the Processor level to the Protocol level since the parser configuration depends on the protocol and the parser is, otherwise, stateless. (markt)
- Align HTTP/2 with HTTP/1.1 and recycle the container internal request and response processing objects by default. This behaviour can be controlled via the new `discardRequestsAndResponses` attribute on the HTTP/2 upgrade protocol. (markt)

#### jdbc-pool

- 69206: Ensure statements returned from `Statement` methods `executeQuery()`, `getResultSet()` and `getGeneratedKeys()` are correctly wrapped before being returned to the caller. Based on pull request #742 provided by Michael Clarke.

#### Other

- Fix packaging regression with missing osgi information following addition of the `test-only` build target. (remm)
- Update Tomcat Native to 1.3.1. (markt)
- Update Byte Buddy to 1.14.18. (markt)
- Improvements to French translations. (remm)
- Improvements to Japanese translations by tak7iji. (markt)

### 2024-07-08 Tomcat 9.0.91 (remm)

#### Catalina

- Allow `JAASRealm` to use the configuration source to load a configured `configFile`, for easier use with testing. (remm)
- Add missing algorithm callback to the `JAASCallbackHandler`. (remm)
- 69131: Expand the implementation of the `filter` value of the Authenticator attribute `allowCorsPreflight`, so that it applies to all requests that match the configured URL patterns for the CORS filter, rather than only applying if the CORS filter is mapped to `/*`. (markt)

#### Coyote

- Improve the algorithm used to identify the IP address to use to unlock the acceptor thread when a Connector is listening on all local addresses. Interfaces that are configured for point to point connections or are not currently up are now skipped. (markt)
- 69121: Ensure that the `onComplete()` event is triggered if `AsyncListener.onError()` dispatches to a target that throws an exception. (markt)
- Following the trailer header field refactoring, `-1` is no longer an allowed value for `maxTrailerSize`. Adjust documentation accordingly. (remm)

#### Jasper

- Update the optimisation in `jakarta.el.ImportHandler` so it is aware of new classes added to the `java.lang` package in Java 23. (markt)
- Ensure that an exception in `toString()` still results in an `ELException` when an object is coerced to a String using `ExpressionFactory.coerceToType()`. (markt)
- Add support for specifying Java 24 (with the value `24`) as the compiler source and/or compiler target for JSP compilation. If used with an Eclipse JDT compiler version that does not support these values, a warning will be logged and the default will used. (markt)
- 69135: When using include directives in a tag file packaged in a JAR file, ensure that context relative includes are processed correctly. (markt)
- 69135: When using include directives in a tag file packaged in a JAR file, ensure that file relative includes are processed correctly. (markt)
- 69135: When using include directives in a tag file packaged in a JAR file, ensure that file relative includes are are not permitted to access files outside of the `/META_INF/tags/` directory nor outside of the JAR file. (markt)

#### Web applications

- Fix status servlet detailed view of the connectors when using automatic port. (remm)

#### Other

- Add `test-only` build target to allow running only the testsuite, supporting Java versions down to the minimum supported to run Tomcat. (rjung)
- Update UnboundID to 7.0.1. (markt)
- Update to SpotBugs 4.8.6. (markt)
- Remove cglib dependency as it is not required by the version of EasyMock used by the unit tests. (markt)
- Update EasyMock to 5.3.0. This adds a test dependency on Byte-Buddy 1.14.17. (markt)
- Improvements to Czech translations by Vladimír Chlup. (markt)
- Improvements to French translations. (remm)
- Improvements to Japanese translations by tak7iji. (markt)
- Improvements to Chinese translations by fangzheng. (markt)

### 2024-06-19 Tomcat 9.0.90 (remm)

#### Catalina

- Add support for shallow copies when using WebDAV. (markt)
- Deprecate the `WebdavFixFilter` as it is no longer required. (markt)
- 69066: Fix regression in SPNEGO authenticator when processing Base64. Submitted by Daniel Lyko. (remm)
- Update minimum recommended version of Tomcat Native to 1.3.0. Pull request #728 provided by Dimitrios Soumis. (markt)
- The system property `org.apache.catalina.connector.RECYCLE_FACADES` will now default to `true` if not specified, which will in turn set the default value for the `discardFacades` connector attribute, thus causing facade objects to be discarded by default. (remm)
- Add `RealmBase.getPrincipal(GSSName, GSSCredential, GSSContext)` for retrieving extended/additional information from an established GSS context. (michaelo)
- Correct a regression in the fix for 68721 that caused some instances of `LinkageError` to be reported as `ClassNotFoundException`. (markt)
- Ensure that static resources deployed via a JAR file remain accessible when the context is configured to use a bloom filter. Based on pull request #730 provided by bergander. (markt)
- Introduce reference counting so the `AprLifecycleListener` is more robust. This particularly targets more complex embedded configurations with multiple server instances with independent lifecycles where more than one server instance requires the `AprLifecycleListener`. (markt)

#### Coyote

- 69068: Ensure read timouts are triggered for asynchronous, non-blocking reads when using HTTP/2. (markt)
- 69133: Add task queue size configuration on the `Connector` element, similar to the `Executor` element, for consistency. (remm)
- Make counting of active HTTP/2 streams per connection more robust. (markt)
- Add support for TLS 1.3 client initiated re-keying. (markt)

#### Jasper

- 68546: Small additional optimisation for initial loading of Servlet code generated for JSPs. Based on a suggestion by Dan Armstrong. (markt)

#### Web applications

- Add the ability to set a sub-title for the Manager web application main page. This is intended to allow users with lots of instances to easily distinguish them. Based on pull request #724 by Simon Arame. (markt)

#### Other

- Revert Derby to 10.16.1.1 as that is the latest version of Derby that runs on Java 17. (markt)
- Update to Commons Daemon 1.4.0. (markt)
- Update to Objenesis 3.4. (markt)
- Update to Checkstyle 10.17.0. (markt)
- Update to SpotBugs 4.8.5. (markt)
- Improvements to French translations. (remm)
- Improvements to Japanese translations by tak7iji. (markt)

### 2024-05-07 Tomcat 9.0.89 (remm)

#### Catalina

- Deprecate and remove `sessionCounter` (replaced by the addition of the active session count and the expired session count, as a reasonable approximation) and `duplicates` (which does not represent a possible event in current implementations) statistics from the session manager. (remm)
- 68890 Align output encoding of JSPs in the Manager webapp with the XML declarations in those same files. (schultz)
- Update Basic authentication to implement the requirements of RFC 7617 including the changing of the `trimCredentials` setting which is now defaults to `false`. Note that the `trimCredentials` setting will be removed in Tomcat 11. (markt)
- Small performance optimization when logging cookies with no values. (schultz)
- Correct error handling for asynchronous requests. If the application performs an dispatch during `AsyncListener.onError()` the dispatch is now performed rather than completing the request using the error page mechanism. (markt)
- Fix WebDAV lock null (locks for non existing resources) thread safety and removal. (remm)
- Add periodic checking for WebDAV locks expiration. (remm)
- Extend `Asn1Parser` to parse `UTF8String`s. (michaelo)

#### Coyote

- Align non-secure and secure writes with NIO and skip the write attempt when there are no bytes to be written. (markt)
- Allow any positive value for `socket.unlockTimeout`. If a negative or zero value is configured, the default of `250ms` will be used. (mark)
- Reduce the time spent waiting for the connector to unlock. The previous default of 10s was noticeably too long for cases where the unlock has failed. The wait time is now 100ms plus twice `socket.unlockTimeout`. (markt)
- Ensure that the `onAllDataRead()` event is triggered when the request body uses chunked encoding and is read using non-blocking IO. (markt)
- 68934: Add debug logging in the latch object when exceeding `maxConnections`. (remm)
- Refactor trailer field handling to use a `MimeHeaders` instance to store trailer fields. (markt)
- Ensure that multiple instances of the same trailer field are handled correctly. (markt)
- Fix non-blocking reads of chunked request bodies. (markt)
- When an invalid HTTP response header was dropped, an off-by-one error meant that the first header in the response was also dropped. Fix based on pull request #710 by foremans. (markt)

#### Jasper

- Add support for specifying Java 23 (with the value `23`) as the compiler source and/or compiler target for JSP compilation. If used with an Eclipse JDT compiler version that does not support these values, a warning will be logged and the default will used. (markt)

#### WebSocket

- 68884: Reduce the write timeout when writing WebSocket close messages for abnormal closes. The timeout defaults to 50 milliseconds and may be controlled using the `org.apache.tomcat.websocket.ABNORMAL_SESSION_CLOSE_SEND_TIMEOUT` property in the user properties collection associated with the WebSocket session. (markt)

#### Web applications

- Examples: Improve performance of WebSocket chat application when multiple clients disconnect at the same time. (markt)
- Examples: Increase the number of previous messages displayed when using the WebSocket chat application. (markt)
- Examples: Improve performance of WebSocket snake application when multiple clients disconnect at the same time. (markt)

#### Other

- Switch to using the Base64 encoder and decoder provided by the JRE rather than the version provided by Commons Codec. The internal fork of Commons Codec has been deprecated and will be removed in Tomcat 11. (markt)
- Update NSIS to 3.10. (mark0t)
- Update UnboundID to 7.0.0. (markt)
- Update Checkstyle to 10.16.0. (markt)
- Update JaCoCo to 0.8.12. (markt)
- Update SpotBugs to 4.8.4. (markt)
- Update the internal fork of Apache Commons BCEL to 6.9.0. (markt)
- Update the internal fork of Apache Commons DBCP to 2.12.0. (markt)
- Improvements to Japanese translations by tak7iji. (markt)

### 2024-04-16 Tomcat 9.0.88 (remm)

#### Catalina

- Add `highConcurrencyStatus` attribute to the `SemaphoreValve` to optionally allow the valve to return an error status code to the client when a permit cannot be acquired from the semaphore. (remm)
- Add checking of the "age" of the running Tomcat instance since its build-date to the SecurityListener, and log a warning if the server is old. (schultz)
- When using the `AsyncContext`, throw an `IllegalStateException`, rather than allowing an `NullPointerException`, if an attempt is made to use the `AsyncContext` after it has been recycled. (markt)
- Change the thread-safety mechanism for protecting StandardServer.services from a simple synchronized lock to a ReentrantReadWriteLock to allow multiple readers to operate simultaneously. Based upon a suggestion by Markus Wolfe. (schultz)
- Improve Service connectors, Container children and Service executors access sync using a ReentrantReadWriteLock. (remm)
- Improve handling of integer overflow if an attempt is made to upload a file via the Servlet API and the file is larger than `Integer.MAX_VALUE`. (markt)
- 68862: Handle possible response commit when processing read errors. (remm)

#### Coyote

- Add `threadsMaxIdleTime` attribute to the endpoint, to allow configuring the amount of time before an internal executor will scale back to the configured `minSpareThreads` size. (remm)

#### Jasper

- Handle the case where the JSP engine forwards a request/response to a Servlet that uses an `OutputStream` rather than a `Writer`. This was triggering an `IllegalStateException` on code paths where there was a subsequent attempt to obtain a `Writer`. (markt)
- Correctly handle the case where a tag library is packaged in a JAR file and the web application is deployed as a WAR file rather than an unpacked directory. (markt)
- Prevent the web application's ClassLoader from being pinned by the JSP compiler if an application uses a custom XMLInputFactory. Based upon a suggestion from Simon Niederberger. (schultz)

#### Other

- Update Checkstyle to 10.14.1. (markt)
- Update the internal fork of Apache Commons BCEL to 6.8.2. (markt)
- Update the internal fork of Apache Commons Codec to 1.16.1. (markt)
- Improvements to French translations. (remm)
- Improvements to Japanese translations by tak7iji. (remm)
- Improvements to Chinese translations by leeyazhou. (remm)

### 2024-03-14 Tomcat 9.0.87 (remm)

#### Catalina

- Minor performance improvement for building filter chains. Based on ideas from pull request #702 by Luke Miao. (remm)
- Align error handling for `Writer` and `OutputStream`. Ensure use of either once the response has been recycled triggers a `NullPointerException` provided that `discardFacades` is configured with the default value of `true`. (markt)
- 68692: The standard thread pool implementations that are configured using the `Executor` element now implement `ExecutorService` for better support NIO2. (remm)
- 68495: When restoring a saved POST request after a successful FORM authentication, ensure that neither the URI, the query string nor the protocol are corrupted when restoring the request body. (markt)
- 68721: Workaround a possible cause of duplicate class definitions when using `ClassFileTransformer`s and the transformation of a class also triggers the loading of the same class. (markt)
- The rewrite valve should not do a rewrite if the output is identical to the input. (remm)
- Add a new `valveSkip` (or `VS`) rule flag to the rewrite valve to allow skipping over the next valve in the Catalina pipeline. (remm)

#### Coyote

- Improve the HTTP/2 stream prioritisation process. If a stream uses all of the connection windows and still has content to write, it will now be added to the backlog immediately rather than waiting until the write attempt for the remaining content. (markt)
- Correct a regression in the support for user provided `SSLContext` instances that broke the `org.apache.catalina.security.TLSCertificateReloadListener`. (markt)

#### Jasper

- Add support for specifying Java 22 (with the value `22`) as the compiler source and/or compiler target for JSP compilation. If used with an Eclipse JDT compiler version that does not support these values, a warning will be logged and the default will used. (markt)

#### Cluster

- Avoid updating request count stats on async. (remm)

#### Other

- Improvements to French translations. (remm)
- Improvements to Japanese translations by tak7iji. (markt)
- 57130: Allow digest.(sh|bat) to accept password from a file or stdin. (csutherl/schultz)

### 2024-02-19 Tomcat 9.0.86 (remm)

#### Catalina

- Correct JPMS and OSGi meta-data for `tomcat-enbed-core.jar` by removing reference to `org.apache.catalina.ssi` package that is no longer included in the JAR. Based on pull request #684 by Jendrik Johannes. (markt)
- Fix ServiceBindingPropertySource so that trailing `\r\n` sequences are correctly removed from files containing property values when configured to do so. Bug identified by Coverity Scan. (markt)
- Add improvements to the CSRF prevention filter including the ability to skip adding nonces for resource name and subtree URL patterns. (schultz)
- Review usage of debug logging and downgrade trace or data dumping operations from debug level to trace. (remm)
- 68089: Further improve the performance of request attribute access for `ApplicationHttpRequest` and `ApplicationRequest`. (markt)
- 68559: Allow asynchronous error handling to write to the response after an error during asynchronous processing. (markt)

#### Coyote

- Make asynchronous error handling more robust. Ensure that once a connection is marked to be closed, further asynchronous processing cannot change that. (markt)
- Make asynchronous error handling more robust. Ensure that once the call to `AsyncListener.onError()` has returned to the container, only container threads can access the `AsyncContext`. This protects against various race conditions that would otherwise occur if application threads continued to access the `AsyncContext`.
- Review usage of debug logging and downgrade trace or data dumping operations from debug level to trace. In particular, most of the HTTP/2 debug logging has been changed to trace level. (remm)
- Add support for user provided `SSLContext` instances configured on `SSLHostConfigCertificate` instances. Based on pull request #673 provided by Hakan Altındağ. (markt)
- Improve the Tomcat Native shutdown process to reduce the likelihood of a JVM crash during Tomcat shutdown. (markt)
- Partial fix for 68558: Cache the result of converting to `String` for request URI, HTTP header names and the request `Content-Type` value to improve performance by reducing repeated `byte[]` to `String` conversions. (markt)
- Improve error reporting to HTTP/2 clients for header processing errors by reporting problems at the end of the frame where the error was detected rather than at the end of the headers. (markt)
- Remove the remaining reference to a stream once the stream has been recycled. This makes the stream eligible for garbage collection earlier and thereby improves scalability. (markt)

#### Jasper

- 68546: Generate optimal size and types for JSP imports maps, as suggested by John Engebretson. (remm)
- Review usage of debug logging and downgrade trace or data dumping operations from debug level to trace. (remm)

#### WebSocket

- Correct a regression in the fix for 66508 that could cause an `UpgradeProcessor` leak in some circumstances. (markt)
- Review usage of debug logging and downgrade trace or data dumping operations from debug level to trace. (remm)
- Ensure that WebSocket connection closure completes if the connection is closed when the server side has used the proprietary suspend/resume feature to suspend the connection. (markt)

#### Web applications

- Add support for responses in JSON format from the examples application RequestHeaderExample. (schultz)

#### Other

- Update Checkstyle to 10.13.0. (markt)
- Update JSign to 6.0. (markt)
- Add strings for debug level messages. (remm)
- Update Tomcat Native to 1.3.0. (markt)
- Improvements to French translations. (remm)
- Improvements to Japanese translations by tak7iji. (markt)

### 2024-01-09 Tomcat 9.0.85 (remm)

#### Catalina

- 68378: Align extension to MIME type mappings in the global web.xml with those in httpd by adding `application/vnd.geogebra.slides` for `ggs`, `text/javascript` for `mjs` and `audio/ogg` for opus. (markt)

#### Coyote

- Refactor the `VirtualThreadExecutor` so that it can be used by the NIO2 connector which was using platform threads even when configured to use virtual threads. (markt)
- Correct a regression in the fix for 67675 that broke TLS key file parsing for PKCS#8 format keys that do not specify an explicit pseudo-random function and rely on the default. This typically affects keys generated by OpenSSL 1.0.2. (markt)
- Allow multiple operations with the same name on introspected mbeans, fixing a regression caused by the introduction of a second `addSslHostConfig` method. (remm)
- Relax the check that the HTTP Host header is consistent with the host used in the request line, if any, to make the check case insensitive since host names are case insensitive. (markt)
- 68348: Add support for the partitioned attribute for cookies. (markt)

#### Web Applications

- 68035: Additional fix to the Manager application to enable the deployment of a web application located in a Host's `appBase` where the web application is specified by a bare (no path) WAR or directory name as shown in the documentation. (markt)

#### Other

- Update Checkstyle to 10.12.7. (markt)
- Update SpotBugs to 4.8.3. (markt)
- Improvements to French translations. (remm)
- Improvements to Japanese translations by tak7iji. (markt)

### 2023-12-12 Tomcat 9.0.84 (remm)

#### Catalina

- Background processes should not be run concurrently with lifecycle operations of a container. (remm)
- Correct unintended escaping of XML in some WebDAV responses. The XML list of support locks when provided in response to a PROPFIND request was incorrectly XML escaped. (markt)
- 68227: Ensure that `AsyncListener.onComplete()` is called if `AsyncListener.onError()` calls `AsyncContext.dispatch()`. (markt)
- 68228: Use a 408 status code if a read timeout occurs during HTTP request processing. Includes a test case based on code provided by adwsingh. (markt)

#### Jasper

- 68119: Refactor the `CompositeELResolver` to improve performance during type conversion operations. (markt)

#### Web Applications

- Examples. Improve the error handling so snakes associated with a user that drops from the network are removed from the game. (markt)

#### Other

- Update UnboundID to 6.0.11. (markt)
- Update Checkstyle to 10.12.5. (markt)
- Update SpotBugs to 4.8.2. (markt)
- Update Derby to 10.17.1. (markt)
- Improvements to French translations. (remm)
- Improvements to Japanese translations by tak7iji. (markt)
- Improvements to Brazilian Portuguese translations by John William Vicente. (markt)
- Improvements to Russian translations by usmazat and remm. (markt)

### 2023-11-15 Tomcat 9.0.83 (remm)

#### Catalina

- 67667: `TLSCertificateReloadListener` prints unreadable rendering of `X509Certificate#getNotAfter()`. (michaelo)
- The status servlet included in the manager webapp can now output statistics as JSON, using the `JSON=true` URL parameter. (remm)
- Optionally allow ServiceBindingPropertySource to trim a trailing newline from a file containing a property-value. (schultz)
- 67793: Ensure the original session timeout is restored after FORM authentication if the user refreshes a page during the FORM authentication process. Based on a suggestion by Mircea Butmalai. (markt)
- 67926: `PEMFile` prints unidentifiable string representation of ASN.1 OIDs. (michaelo)
- 66875: Ensure that setting the request attribute `jakarta.servlet.error.exception` is not sufficient to trigger error handling for the current request and response. (markt)
- 68054: Avoid some file canonicalization calls introduced by the fix for 65433. (remm)
- 68089: Improve performance of request attribute access for `ApplicationHttpRequest` and `ApplicationRequest`. (markt)
- Use a 400 status code to report an error due to a bad request (e.g. an invalid trailer header) rather than a 500 status code. (markt)
- Ensure that an `IOException` during the reading of the request triggers always error handling, regardless of whether the application swallows the exception. (markt)

#### Coyote

- 66670: Add `SSLHostConfig#certificateKeyPasswordFile` and `SSLHostConfig#certificateKeystorePasswordFile`. (michaelo)
- When calling `SSLHostConfigCertificate.setCertificateKeystore(ks)`, automatically call `setCertificateKeystoreType(ks.getType())`. (markt)
- 67628: Clarify how the `ciphers` attribute of the `SSLHostConfig` is used. (markt)
- 67666: Ensure TLS connectors using PEM files either work with the `TLSCertificateReloadListener` or, in the rare case that they do not, log a warning on Connector start. (markt)
- 67675: Support a wider range of KDF and ciphers for PEM files than the combinations supported by the JVM by default. Specifically, support the OpenSSL default of HmacSHA256 and DES-EDE3-CBC. (markt)
- 67927: Reloading TLS configuration can cause the Connector to refuse new connections or the JVM to crash. (markt)
- 67934: If both Tomcat Native 1.2.x and 2.0.x are available, prefer 1.2.x since it supports the APR/Native connector whereas 2.0.x does not. (markt)
- 67938: Correct handling of large TLS client hello messages that were causing the TLS handshake to fail. (markt)
- 68026: Convert selected `MessageByte` values to String when first accessed to speed up subsequent accesses and reduce garbage collection. (markt)

#### Jasper

- 68068: Performance improvement for EL. Based on a suggestion by John Engebretson. (markt)

#### Web applications

- 68035: Correct a regression in the fix for 56248 that prevented deployment via the Manager of a WAR or directory that was already present in the `appBase` or a context file that was already present in the `xmlBase`. (markt)

#### Other

- 67538: Make use of Ant's `<javaversion />` task to enfore the mininum Java build version. (michaelo)
- Update Checkstyle to 10.12.4. (markt)
- Update JaCoCo to 0.8.11. (markt)
- Update SpotBugs to 4.8.0. (markt)
- Update BND to 7.0.0. (markt)
- The minimum Java version required to build Tomcat has been raised to Java 17. (markt)

### 2023-10-13 Tomcat 9.0.82 (remm)

#### Coyote

- 67670: Fix regression with HTTP compression after code refactoring. (remm)

#### jdbc-pool

- 67664: Correct a regression in the clean-up of unnecessary use of fully qualified class names in 9.0.81 that broke the jdbc-pool. (markt)

### 2023-10-10 Tomcat 9.0.81 (remm)

#### Catalina

- 65770: Provide a lifecycle listener that will automatically reload TLS configurations a set time before the certificate is due to expire. This is intended to be used with third-party tools that regularly renew TLS certificates. (markt)
- Fix handling of an error reading a context descriptor on deployment. (remm)
- Fix rewrite rule qsd (query string discard) being ignored if qsa was also use, while it should instead take precedence. (remm)
- 67472: Send fewer CORS-related headers when CORS is not actually being engaged. (schultz)
- Improve handling of failures within `recycle()` methods. (markt)

#### Coyote

- 67198: Ensure that the AJP connector attribute `tomcatAuthorization` takes precedence over the `tomcatAuthentication` attribute when processing an `auth_type` attribute received from a proxy server. (markt)
- 67235: Fix a `NullPointerException` when an `AsyncListener` handles an error with a dispatch rather than a complete. (markt)
- When an error occurs during asynchronous processing, ensure that the error handling process is only triggered once per asynchronous cycle. (markt)
- Fix logic issue trying to match no argument method in IntropectionUtil. (remm)
- Improve thread safety around readNotify and writeNotify in the NIO2 endpoint. (remm)
- Avoid rare thread safety issue accessing message digest map. (remm)
- Improve statistics collection for upgraded connections under load. (remm)
- Align validation of HTTP trailer fields with standard fields. (markt)
- Improvements to HTTP/2 overhead protection. (markt)

#### Jasper

- 67080: Improve performance of EL expressions in JSPs that use implicit objects. Based on suggestions by John Engebretson, Anurag Dubey and Christopher Schultz. (markt)

#### Other

- Update the internal fork of Apache Commons FileUpload to 7a8c324 (2023-09-16, 1.x-SNAPSHOT). Due to significant refactoring in the 2.x branch requiring additional Commons IO dependencies, Tomcat has switched to tracking the 1.x branch. (markt)
- Add the `Bundle-License` header to the JAR manifest for all Tomcat JARs. (markt)
- Update UnboundID to 6.0.10. (markt)
- Update Checkstyle to 10.12.3. (markt)
- Update Tomcat Native to 1.2.39 to pick up Windows binaries built with OpenSSL 3.0.11. (markt)
- Update Commons Pool to 2.12.0. (markt)
- Improvements to French translations. (remm)
- Improvements to Japanese translations by tak7iji. (markt)
- Improvements to Russian translations by usmazat. (markt)

### 2023-08-25 Tomcat 9.0.80 (markt)

#### Catalina

- If an application or library sets both a non-500 error code and the `javax.servlet.error.exception` request attribute, use the provided error code during error page processing rather than assuming an error code of 500. (markt)
- Update code comments and Tomcat output to use MiB for 1024 * 1024 bytes and KiB for 1024 bytes rather than MB and kB. (martk)
- Avoid protocol relative redirects in FORM authentication. (markt)

#### Web applications

- Documentation. Update documentation to use MiB for 1024 * 1024 bytes and KiB for 1024 bytes rather than MB and kB. (martk)

#### Other

- Improvements to Chinese translations. (lihan)
- Improvements to French translations. (remm)
- Improvements to Japanese translations by tak7iji. (markt)

### 2023-08-15 Tomcat 9.0.79 (remm)

#### Catalina

- Fix potential database connection leaks in `DataSourceUserDatabase` identified by Coverity Scan. (markt)
- Make parsing of `ExtendedAccessLogValve` patterns more robust. (markt)
- Fix failure trying to persist configuration for an internal credential handler. (remm)
- 66680: When serializing a session during the session presistence process, do not log a warning that null Principals are not serializable. Pull request #638 provided by tsryo. (markt)
- Catch `NamingException` in `JNDIRealm#getPrincipal`. It is used in Java up to 17 to signal closed connections. (fschumacher)
- 66822: Use the same naming format in log messages for Connector instances as the associated ProtocolHandler instance. (markt)
- The parts count should also lower the actual `maxParameterCount` used for parsing parameters if parts are parsed first. (remm)

#### Coyote

- Refactor blocking reads and writes for the NIO connector to remove code paths that could allow a notification from the Poller to be missed resuting in a timeout rather than the expected read or write. (markt)
- Refactor waiting for an HTTP/2 stream or connection window update to handle spurious wake-ups during the wait. (markt)
- Correct a regression introduced in 9.0.78 and use the correct constant when constructing the default value for the `certificateKeystoreFile` attribute of an `SSLHostConfigCertificate` instance. (markt)
- Refactor HTTP/2 implementation to reduce pinning when using virtual threads. (markt)
- Pass through ciphers referring to an OpenSSL profile, such as `PROFILE=SYSTEM` instead of producing an error trying to parse it. (remm)
- 66841: Ensure that `AsyncListener.onError()` is called after an error during asynchronous processing with HTTP/2. (markt)
- 66842: When using asynchronous I/O (the default for NIO and NIO2), include DATA frames when calculating the HTTP/2 overhead count to ensure that connections are not prematurely terminated. (markt)
- Correct a race condition that could cause spurious RST messages to be sent after the response had been written to an HTTP/2 stream. (markt)

#### WebSocket

- 66681: Fix a `NullPointerException` when flushing batched messages with compression enabled using `permessage-deflate`. (markt)

#### jdbc-pool

- Fix the `releaseIdleCounter` does not increment when testAllIdle releases them. Pull request #241 provided by Arun Chaitanya Miriappalli (lihan)
- Fix the `ConnectionState` state will be inconsistent with actual state on the connection when an exception occurs while writing. Pull request #643 provided by Wenjun Xiao. (lihan)

#### Other

- Align documentation for maxParameterCount to match hard-coded defaults. Contributed by Michal Sobkiewicz. (schultz)
- Update NSIS to 3.09. (markt)
- Update Checkstyle to 10.12.2. (markt)
- Improvements to French translations. (remm)
- Improvements to Japanese translations. Contributed by tak7iji and Shirayuking. (markt)
- 66829: Fix quoting so users can use the `_RUNJAVA` environment variable as intended on Windows when the path to the Java executable contains spaces. (markt)
- Update Tomcat Native to 1.2.38 to pick up Windows binaries built with OpenSSL 1.1.1v. (markt)

### 2023-07-10 Tomcat 9.0.78 (remm)

#### Other

- Correct properties for JSign dependency. (rjung)

### not released Tomcat 9.0.77 (remm)

#### Catalina

- 59232: Add `org.apache.catalina.core.ContextNamingInfoListener`, a listener which creates context naming information environment entries. (michaelo)
- 66665: Add `org.apache.catalina.core.PropertiesRoleMappingListener`, a listener which populates the context's role mapping from a properties file. (michaelo)
- Fix an edge case where intra-web application symlinks would be followed if the web applications were deliberately crafted to allow it even when `allowLinking` was set to `false`. (markt)
- Add utlity config file resource lookup on `Context` to allow looking up resources from the webapp (prefixed with `webapp:`) and make the resource lookup API more visible. (remm)

#### Coyote

- 66627: Restore the documented behaviour of `MessageBytes.getType()` that it returns the type of the original content rather than reflecting the most recent conversion. (markt)
- 66635: Correct certificate logging on start-up so it differentiates between keystore based keys/certificates and PEM file based keys/certificates and logs the relevant information for each. (markt)

#### WebSocket

- Improve handling of error conditions for the WebSocket server, particularly during Tomcat shutdown. (markt)
- Correct a regression in the fix for 66574 that meant the WebSocket session could return false for `onOpen()` before the `onClose()` event had been completed. (markt)

#### Web applications

- Documentation. Expand the security guidance to cover the embedded use case and add notes on the uses made of the `java.io.tmpdir` system property. (markt)
- 66662: Documentation. Fix a typo in the name of the algorithms attribute in the configuration section for the Digest authentication valve. Pull request #629 provided by gohilmca. (markt)

#### Other

- Include the Windows specific binary distributions in the files uploaded to Maven Central. (markt)
- Improvements to French translations. (remm)
- Improvements to Japanese translations. Contributed by tak7iji. (markt)
- Update UnboundID to 6.0.9. (markt)
- Update Checkstyle to 10.12.1. (markt)
- Update BND to 6.4.1. (markt)
- Update JSign to 5.0. (markt)

### 2023-06-09 Tomcat 9.0.76 (remm)

#### Catalina

- Add RateLimitFilter which can be used to mitigate DoS and Brute Force attacks. (isapir)
- Move the management of the utility executor from the `init()`/`destroy()` methods of components to the `start()`/`stop()` methods. (markt)
- Add `org.apache.catalina.core.StandardVirtualThreadExecutor`, a virtual thread based executor that may be used with one or more Connectors to process requests received by those Connectors using virtual threads. This Executor requires a minimum Java version of Java 21. (markt)
- 66513: Add a per session Semaphore to the `PersistentValve` that ensures that, within a single Tomcat instance, there is no more than one concurrent request per session. Also expand the debug logging to include whether a request bypasses the Valve and the reason if a request fails to obtain the per session Semaphore. (markt)
- 66609: Ensure that the default servlet correctly escapes file names in directory listings when using XML output. Based on pull request #621 by Alex Kachanov. (markt)
- 66618: Add a numeric last modified field to the XML directory listings produced by the default servlet to enable sorting in the XSLT. Pull request #622 by Alex Kachanov. (markt)
- 66621: Attempts to lock a collection with WebDAV may incorrectly fail if a child collection has an expired lock. (markt)
- 66622: Deprecate the `xssProtectionEnabled` setting from the `HttpHeaderSecurityFilter` and change the default value to `false` as support for the associated HTTP header has been removed from all major browsers. (markt)

#### Coyote

- Update the HTTP/2 implementation to use the prioritization scheme defined in RFC 9218 rather than the one defined in RFC 7540. (markt)
- 66602: not sending WINDOW_UPDATE when dataLength is ZERO on call SwallowedDataFramePayload. Pull request #619 by ledefe. (lihan)

#### WebSocket

- 66548: Expand the validation of the value of the `Sec-Websocket-Key` header in the HTTP upgrade request that initiates a WebSocket connection. The value is not decoded but it is checked for the correct length and that only valid characters from the base64 alphabet are used. (markt)

#### Other

- Update to Commons Daemon 1.3.4. (markt)
- Improvements to French translations. (remm)
- Update Checkstyle to 10.12.0. (markt)
- Update the packaged version of the Apache Tomcat Native Library to 1.2.37 to pick up the Windows binaries built with with OpenSSL 1.1.1u. (markt)

### 2023-05-10 Tomcat 9.0.75 (remm)

#### Catalina

- 66567: Fix missing `IllegalArgumentException` after the Tomcat code was converted to using URI instead of URL. (remm)
- Escape timestamp output in `AccessLogValve` if a `SimpleDateFormat` is used which contains verbatim characters that need escaping. (rjung)
- Change output of vertical tab in `AccessLogValve` from `\v` to `\u000b`. (rjung)
- Improve performance of escaping in `AccessLogValve` roughly by a factor of two. (rjung)
- Improve `JsonAccessLogValve`: support more patterns like for headers and attributes. Those will be logged as sub objects. (rjung)
- #613: Fix possible partial corrupted file copies when using file locking protection or the manager servlet. Submitted by Jack Shirazi. (remm)

#### Coyote

- Add support for a new character set, `gb18030-2022` - introduced in Java 21, to the character set caching mechanism. (markt)
- Fix an edge case in HTTP header parsing and ensure that HTTP headers without names are treated as invalid. (markt)
- Deprecate the HTTP Connector settings `rejectIllegalHeader` and `allowHostHeaderMismatch` as they have been removed in Tomcat 11 onwards. (markt)
- 66591: Fix a regression introduced in the fix for 66512 that meant that an AJP Send Headers was not sent for responses where no HTTP headers were set. (markt)

#### Jasper

- 66582: Account for EL having stricter requirements for static imports than JSPs when adding JSP static imports to the EL context. (markt)

#### WebSocket

- 66574: Refactor WebSocket session close to remove the lock on the `SocketWrapper` which was a potential cause of deadlocks if the application code used simulated blocking. (markt)
- 66575: Avoid unchecked use of the backing array of a buffer provided by the user in the compression transformation. (remm)
- Improve exception handling when flushing batched messages during WebSocket session close. (markt)
- 66581: Update `AsyncChannelGroupUtil` to align it with the current defaults for AsynchronousChannelGroup. Pull request #612 by Matthew Painter. (markt)

#### Other

- Improvements to French translations. (remm)
- Improvements to Chinese translations. (lihan)
- Update Checkstyle to 10.10.0. (markt)
- Update Jacoco to 0.8.10. (markt)

### 2023-04-18 Tomcat 9.0.74 (remm)

#### Catalina

- 65995: Implement RFC 9239 and use `text/javascript` as the media type for JavaScript rather than `application/javascript`. (markt)
- Add an access log valve that uses a json format. Based on pull request #539 provided by Thomas Meyer. (remm)
- Harden the FORM authentication process against DoS attacks by using a reduced session timeout if the FORM authentication process creates a session. The duration of this timeout is configured by the `authenticationSessionTimeout` attribute of the FORM authenticator. (markt)
- 66527: Correct the Javadoc for the `Tomcat.addWebapp()` methods that incorrectly stated that the `docBase` parameter could be a relative path. (markt)
- 66524 Correct eviction ordering in WebResource cache to be LRU as intended. (schultz)
- Use server.xml to reduce the default value of `maxParameterCount` from 10,000 to 1,000. If not configured in server.xml, the default remains 10,000. (markt)
- Update Digest authentication support to align with RFC 7616. This adds a new configuration attribute, `algorithms`, to the `DigestAuthenticator` with a default of `SHA-256,MD5`. (markt)
- Add support code for custom user attributes in `RealmBase`. Based on code from #473 by Carsten Klein. (remm)
- Expand the set of HTTP request headers considered sensitive that should be skipped when generating a response to a `TRACE` request. This aligns with 11.0.x. (markt)
- 66541: Improve handling for cached resources for resources that use custom URL schemes. The scheme specific `equals()` and `hashCode()` algorithms, if present, will now be used for URLs for these resources. This addresses a potential performance issue with some OSGi custom URL schemes that can trigger potentially slow DNS lookups in some configurations. Based on a patch provided by Tom Whitmore. (markt)
- When using a custom session manager deployed as part of the web application, avoid `ClassNotFoundException`s when validating session IDs extracted from requests. (markt)
- 66543: Give `StandardContext#fireRequestDestroyEvent` its own log message. (fschumacher)
- 66554: Initialize Random during server initialization to avoid possible JVM thread creation in the webapp context on some platforms. (remm)
- Make the server utility executor available to webapps using a Servlet context attribute named `org.apache.tomcat.util.threads.ScheduledThreadPoolExecutor`. (remm)

#### Coyote

- JSON filter should support specific escaping for common special characters as defined in RFC 8259. Based on code submitted by Thomas Meyer. (remm)
- 66511: Fix `GzipOutputFilter` (used for compressed HTTP responses) when used with direct buffers. Patch suggested by Arjen Poutsma. (markt)
- 66512: Align AJP handling of invalid HTTP response headers (they are now removed from the response) with HTTP. (markt)
- 66530: Correct a regression in the fix for bug 66442 that meant that streams without a response body did not decrement the active stream count when completing leading to `ERR_HTTP2_SERVER_REFUSED_STREAM` for some connections. (markt)
- Refactor synchronization blocks locking on `SocketWrapper` to use `ReentrantLock` to support users wishing to experiment with project Loom. (markt)

#### Jasper

- 66536: Fix parsing of tag files that meant that tag directives could be ignored for some tag files. (markt)

#### Cluster

- 66535: Redefine the `maxValidTime` attribute of `FarmWarDeployer` to be the maximum time allowed between receiving parts of a transferred file before the transfer is cancelled and the associated resources cleaned-up. A new warning message will be logged if the file transfer is cancelled. (markt)

#### WebSocket

- 66508: When using WebSocket with NIO2, avoid waiting for a timeout before sending the close frame if an I/O error occurs during a write. (markt)

#### Other

- Improvements to French translations. (remm)
- Improvements to Japanese translations. Contributed by Shirayuking and tak7iji. (markt)
- Improvements to Chinese translations. Contributed by totoo. (markt)
- Refactor code using `MD5Encoder` to use `HexUtils.toHexString()`. (markt)
- 66507: Fix a bug that `$JAVA_OPTS` is not passed to the jvm in `catalina.sh` when calling `version`. Patch suggested by Eric Hamilton. (lihan)
- Update the internal fork of Commons DBCP to f131286 (2023-03-08, 2.10.0-SNAPSHOT). This corrects a regression introduced in 9.0.71. (markt)
- Improve the error messages if `JRE_HOME` or `JAVA_HOME` are not set correctly. On windows, align the handling of `JRE_HOME` and `JAVA_HOME` for the start-up scripts and the service install script. (markt)
- Update UnboundID to 6.0.8. (markt)
- Update Checkstyle to 10.9.3. (markt)
- Update Jacoco to 0.8.9. (markt)
- Enhance PEMFile to load from an InputStream. Patch provided by Romain Manni-Bucau. (schultz)

### 2023-03-03 Tomcat 9.0.73 (remm)

#### General

- Fix a bug that memory allocation is larger than limit in `SynchronizedStack` to reduce memory footprint. (lihan)

#### Catalina

- Add support for `txt:` and `rnd:` rewrite map types from mod_rewrite. Based on a pull request #591 provided by Dimitrios Soumis. (remm)
- Provide a more appropriate response (501 rather than 400) when rejecting an HTTP request using the CONNECT method. (markt)
- 66488: Correct a regression introduced in the fix for bug 66196 that meant that the HTTP headers and/or request line could get corrupted (one part overwriting another part) within a single request. (markt)

#### Coyote

- Add a check for the validity of the scheme pseudo-header in HTTP/2. (markt)
- 66482: Restore inline state after async operation in NIO2, to account the fact that unexpected exceptions are sometimes thrown by the implementation. Patch submitted by zhougang. (remm)

### 2023-02-23 Tomcat 9.0.72 (remm)

#### Catalina

- Allow a Valve to access cookies from a request that cannot be mapped to a Context. (markt)
- Refactor uses of `String.replaceAll()` to use `String.replace()` where regular expressions where not being used. Pull request #581 provided by Andrei Briukhov. (markt)
- Add error report valve that allows redirecting to of proxying from an external web server. Based on code and ideas from pull request #506 provided by Max Fortun. (remm)
- 66470: Add the Shared Address Space defined by RFC 6598 (100.64.0.0/10) to the regular expression used to identify internal proxies for the `RemoteIpFilter` and `RemoteIpValve`. (markt)
- 66471: Fix JSessionId secure attribute missing When `RemoteIpFilter` determines that this request was submitted via a secure channel. (lihan)

#### Coyote

- Log basic information for each configured TLS certificate when Tomcat starts. (markt)
- 66442: When an HTTP/2 response must not include a body, ensure that the end of stream flag is set on the headers frame and that no data frame is sent. (markt)
- 66455: Fix the cause of a potential `ClassCastException` when processing a `WINDOW_UPDATE` frame on an HTTP/2 connection where the flow control window for the overall connection has been exhausted. (markt)
- Fix a regression introduced in 9.0.65 that prevented HTTP/2 connections from timing out when using a Connector configured with `useAsyncIO=true` (the default for NIO and NIO2). (markt)
- Provided dedicated loggers (`org.apache.tomcat.util.net.NioEndpoint.certificate` / `org.apache.tomcat.util.net.Nio2Endpoint.certificate` / `org.apache.tomcat.util.net.AprEndpoint.certificate`) for logging of configured TLS certificates. (markt)

#### Jasper

- 66419: Fix calls from expression language to a method that accepts varargs when only one argument was passed. (markt)
- 66441: Make imports of static fields in JSPs visible to any EL expressions used on the page. (markt)

#### Web applications

- 66429: Documentation. Limit access to the documentation web application to localhost by default. (markt)
- 66429: Examples. Limit access to the examples web application to localhost by default. (markt)

#### Other

- Update BND to 6.4.0. (markt)
- Improvements to Korean translations. (woonsan)
- Update the packaged version of the Apache Tomcat Native Library to 1.2.36 to pick up the Windows binaries built with with OpenSSL 1.1.1t. (markt)

### 2023-01-13 Tomcat 9.0.71 (remm)

#### Catalina

- 66388: Correct a regression in the refactoring that replaced the use of the `URL` constructors. The regression broke lookups for resources that contained one or more characters in their name that required escaping when used in a URI path. (markt)
- 66392: Change the default value of `AccessLogValve`'s file encoding to UTF-8 and update documentation. (lihan)
- 66393: Align `ExtendedAccessLogValve`'s x-P(XXX) with the documentation. (lihan)

#### Coyote

- When resetting an HTTP/2 stream because the final response has been generated before the request has been fully read, use the HTTP/2 error code `NO_ERROR` so that client does not discard the response. Based on a suggestion by Lorenzo Dalla Vecchia. (markt)
- 66196: Align HTTP/1.1 with HTTP/2 and throw an exception when attempting to commit a response with an header value that includes one or more characters with a code point above 255. (markt)
- 66385: Correct a bug in HTTP/2 where a non-blocking read for a new frame with the NIO2 connector was incorrectly made using the read timeout leading to unexpected stream closure. (markt)

#### Jasper

- 66370: Change the default of the `org.apache.el.GET_CLASSLOADER_USE_PRIVILEGED` system property to `true` unless the EL library is running on Tomcat in which case the default remains `false` as the EL library is already called from within a privileged block and skipping the unnecessary privileged block improves performance. (markt)
- Add support for specifying Java 21 (with the value `21`) as the compiler source and/or compiler target for JSP compilation. If used with an Eclipse JDT compiler version that does not support these values, a warning will be logged and the default will used. (markt)

#### Other

- Update the internal fork of Apache Commons BCEL to 2ee2bff (2023-01-03, 6.7.1-SNAPSHOT). (markt)
- Update the internal fork of Apache Commons Codec to 3eafd6c (2023-01-03, 1.16-SNAPSHOT). (markt)
- Update the internal fork of Apache Commons FileUpload to 34eb241 (2023-01-03, 2.0-SNAPSHOT). (markt)
- Update the internal fork of Apache Commons DBCP to f131286 (2023-01-03, 2.10.0-SNAPSHOT). (markt)
- Improvements to Japanese translations. Contributed by Shirayuking. (markt)
- Improvements to Portuguese translations. Contributed by Guilherme Custódio. (markt)
- Update Checkstyle to 10.6.0. (markt)
- Update Unboundid to 6.0.7. (markt)
- Update SpotBugs to 4.7.3. (markt)

### 2022-12-05 Tomcat 9.0.70 (remm)

#### Catalina

- Correct the default implementation of `HttpServletRequest.isTrailerFieldsReady()` to return `true` so it is consistent with the default implementation of `HttpServletRequest.getTrailerFields()` and with the Servlet API provided by the Jakarta EE project. (markt)
- Improve the behavior of the credential handler attribute that is set in the Servlet context so that it actually reflects what is used during authentication. (remm)
- 66359: Update javadoc for RemoteIpValve and RemoteIpFilter with correct `protocolHeader` default value of "X-Forwarded-Proto". (lihan)

#### Coyote

- When an HTTP/2 stream was reset, the current active stream count was not reduced. If enough resets occurred on a connection, the current active stream count limit was reached and no new streams could be created on that connection. (markt)

#### Web applications

- 66348: Update the JARs listed in the class loader documentation and note which ones are optional. (markt)
- Documentation. Replace references in the application developer's guide to CVS with more general references to a source code control system. (markt)

#### Other

- Refactor code base to replace use of URL constructors. While they are deprecated in Java 20 onwards, the reasons for deprecation are valid for all versions so move away from them now. (markt)
- Update the internal fork of Apache Commons BCEL to b015e90 (2022-11-28, 6.7.0-RC1). (markt)
- Update the internal fork of Apache Commons Codec to ae32a3f (2022-11-29, 1.16-SNAPSHOT). (markt)
- Update to Commons Daemon 1.3.3. (markt)
- Update the internal fork of Apache Commons FileUpload to aa8eff6 (2022-11-29, 2.0-SNAPSHOT). (markt)
- Improvements to Japanese translations. Contributed by Shirayuking and tak7iji. (markt)

### 2022-11-14 Tomcat 9.0.69 (remm)

#### Catalina

- 66209: Add a configuration option to allow bloom filters used to index JAR files to be retained for the lifetime of the web application. Prior to this addition, the indexes were always flushed by the periodic calls to `WebResourceRoot.gc()`. As part of this addition, configuration of archive indexing moves from `Context` to `WebResourceRoot`. Based on a patch provided by Rahul Jaisimha. (markt)
- 66330: Correct a regression introduced when fixing 62897 that meant any value configured for `skipMemoryLeakChecksOnJvmShutdown` on the `Context` was ignored and the default was always used. (markt)
- 66331: Fix a regression in refactoring for `Stack` on the `SystemLogHandler` which caught incorrect exception. (lihan)
- 66338: Fix a regression that caused a nuance in refactoring for `ErrorReportValve`. (lihan)
- Escape values used to construct output for the `JsonErrorReportValve` to ensure that it always outputs valid JSON. (markt)

#### Coyote

- Correct the date format used with the expires attribute of HTTP cookies. A single space rather than a single dash should be used to separate the day, month and year components to be compliant with RFC 6265. (markt)
- Include the name of the current stream state in the error message when a stream is cancelled due to an attempt to write to the stream when it is in a state that does not permit writes. (markt)
- NIO writes never return -1 so refactor `CLOSED_NIO_CHANNEL` not to do so and remove checks for this return value. Based on #562 by tianshuang. (markt)
- Remove unnecessary code that exposed the `asyncTimeout` to components that never used it. (markt)

#### Jasper

- 66294: Make the use of a privileged block to obtain the thread context class loader added to address 62080 optional and disabled by default. This is now controlled by the `org.apache.el.GET_CLASSLOADER_USE_PRIVILEGED` system property. (markt)
- 66325: Fix concurrency issue in evaluation of expression language containing lambda expressions. (markt)

#### jdbc-pool

- 66346: Ensure all JDBC pool JARs are reproducible. Pull request #566 provided by John Neffenger. (markt)

#### Other

- Update to Commons Daemon 1.3.2. (markt)
- Improvements to Chinese translations. Contributed by DigitalCat and lihan. (markt)
- Improvements to French translations. Contributed by Mathieu Bouchard. (markt)
- Improvements to Japanese translations. Contributed by Shirayuking. (markt)

### 2022-10-07 Tomcat 9.0.68 (markt)

#### Catalina

- Update the `RewriteValve` to perform pattern matching using dotall mode to avoid unexpected behaviour if the URL includes encoded line terminators. (markt)

#### Coyote

- 66276: Fix incorrect class cast when adding a descendant of HTTP/2 streams. (lihan)
- 66281: Fix unexpected timeouts that may appear as client disconnections when using HTTP/2 and NIO2. (markt)
- Enforce the requirement of RFC 7230 onwards that a request with a malformed `content-length` header should always be rejected with a 400 response. (markt)

#### Jasper

- 66277: Fix regressions in refactoring from `Stack` `ArrayDeque`.
- Add support for specifying Java 20 (with the value `20`) as the compiler source and/or compiler target for JSP compilation. If used with an Eclipse JDT compiler version that does not support these values, a warning will be logged and the default will used. (markt)

#### Web applications

- Documentation. Document the `nonceRequestParameterName` attribute for the `CsrfPreventionFilter`. Based on #553 by Mert Ülkgün. (markt)

#### Other

- Update Objenesis to 3.2. (markt)
- Update UnboundID to 6.0.6. (markt)
- Update Checkstyle to 10.3.4. (markt)
- Update JaCoCo to 0.8.8. (markt)
- Update SpotBugs to 4.7.2. (markt)
- Update JSign to 4.2. (markt)
- Update Derby to 10.16.1.1. (markt)
- Improvements to Chinese translations. (markt)
- Improvements to Czech translations. (markt)
- Improvements to French translations. (remm)
- Improvements to Japanese translations. Contributed by tak7iji and Shirayuking. (markt)
- Improvements to Korean translations. (markt)
- Improvements to Spanish translations. (markt)

### 2022-09-26 Tomcat 9.0.67 (remm)

#### Coyote

- Fix a regression in refactoring for Hashtables which caused mbeans to lose many of their attributes. (remm)

### not released Tomcat 9.0.66 (remm)

#### Catalina

- Correct handling of HTTP TRACE requests where there are multiple instances of an HTTP header with the same name. (markt)
- Implement the requirements of RFC 7231 and do not include sensitive headers in responses to HTTP TRACE requests. (markt)
- Implement the clarification in RFC 9110 that the units in HTTP range specifiers are case insensitive. (markt)
- Properly-escape role and group information when writing MemoryUserDatabase to an XML file. (schultz)
- Move control of XML-export logic from individual support classes into MemoryUserDatabase.save(). Deprecate and discontinue use of MemoryUser, MemoryRole, and MemoryGroup classes. (schultz)
- 66183: When logging cookie values in an access log valve and there are multiple cookies with the same name, log all cookie values rather than just the first. Based on pull request #541 by Han Li. (markt)
- 66184: Ensure that JULI root loggers have a default level of `INFO`. Pull request #533 provided by Piotr P. Karwasz. (markt)
- Improve handling of stack overflow errors when parsing SSI expressions. (markt)
- 66120: Enable FORM authentication to work correctly if session persistence and restoration occurs during the authentication process. (markt)
- 66233: Include an error message when sending a 400 response because a request has too many cookies. (markt)
- When web application deployment fails due to JARs with duplicate fragment names, improve the error message by listing the JARs that contain the duplicates. Based on pull request #535 by Mads Rolsdorph. (markt)
- Replace logging thread for JULI's `AsyncFileHandler` with an executor to protect against failure of the logging thread. Based on pull request #545 by Piotr P. Karwasz. (markt)

#### Coyote

- Avoid potential NPE by skipping duplicate accept check when using a Unix Domain Socket. Based on #532 by Han Li. (markt)
- Address an edge case in HTTP header parsing that allowed CRCRLF to be used as a valid line terminator. (markt)
- Ensure HTTP/2 requests that include connection specific headers are rejected. (markt)
- When processing HTTP/2 requests, allow a `host` header to be used in place of an `:authority` header. (markt)
- When processing HTTP/2 requests, allow a `host` header and an `:authority` header to be present providing they are consistent. (markt)
- When processing HTTP/2 requests, reject requests containing multiple `host` headers. (markt)
- Make parsing of invalid filename directives in `Content-Disposition` headers more robust. Invalid filename directives will now be ignored rather than triggering a 500 response. (markt)
- 66194: Log HTTP/2 stream closures (usually caused by client errors) via a `UserDataHelper` to broadly align it with the behaviour of HTTP/1.1 for parsing issues and exceeding limits. (markt)
- 66236: Implement support for the special values zero and minus one when configuring `maxSavePostSize` for a Connector when used in conjunction with TLS renegotiation. (markt)
- 66240: Avoid int overflow when parsing octets by limiting the maximum value to 255. Based on a PR #548 by Stefan Mayr. (lihan)
- #550: Correctly handle case where a Servlet responds to a request with an expectation with a 2xx response without reading the request body. Pull request provided by Malay Shah. (markt)
- #551: Avoid potential IndexOutOfBoundsException by fixing incorrect check when matching HTTP/2 preface. Submitted by 刘文章. (lihan)

#### Jasper

- Improve handling of stack overflow errors when parsing EL expressions. (markt)
- Correct parsing of integer and floating point literals in EL expressions so that larger values are correctly parsed to `BigInteger` and `BigDecimal` respectively. (markt)
- 66203: Log an error message when the JSP compiler is unable to create the output directory for the generated code. (markt)
- 66235: Fix various issues with the bean resolver used for Graal. (remm)
- Improve the performance of the `ImportHandler` in the Expression Language implementation. This removes a previous optimisation that is now detrimental rather than helpful. Pull request #547 provided by rmannibucau. (markt)
- Improve handling of EL error messages so instances of Number are not formatted in unexpected ways. (markt/kkolinko)
- Switch to using ELException rather than IllegalArgumentException when a type conversion fails during an EL arithmetic operation. This is an EL error so ELException seems more appropriate. (markt)
- 66246: Fix JspC generates invalid web.xml due to incorrect header. (lihan)
- Fix a bug in `MethodExpression` handling that triggered an error when invoking a static method on an instance of the class rather than directly on the class. (markt)
- Use `BigInteger.remainder()` rather than `BigInteger.mod()` when performing the modulus operation for instances of `BigInteger` as part of an EL expression. (markt)

#### Cluster

- To aid future additions of new functionality, rather than throw an `IllegalArgumentException` if a `DeltaRequest` is passed an unrecognised action type, a warning message will now be logged. (markt)
- 66120: Enable FORM authentication to work correctly if session failover occurs during the authentication process. (markt)

#### WebSocket

- 62312: Add support for authenticating WebSocket clients with an HTTP forward proxy when establishing a connection to a WebSocket endpoint via a forward proxy that requires authentication. Based on a patch provided by Joe Mokos. (markt)

#### Other

- Ensure that zip archives use UTC for file modification times to ensure repeatable builds across time zones. (markt)
- Improvements to Chinese translations. (lihan)
- Improvements to Czech translations. (markt)
- Improvements to French translations. (remm)
- Improvements to German translations. (markt)
- Improvements to Japanese translations. Contributed by tak7iji and Shirayuking. (markt)
- Improvements to Korean translations. Contributed by 수현. (markt)
- Improvements to Russian translations. (markt)
- Improvements to Spanish translations. (markt)
- Further automation to the build process to reduce the number of manual steps that release managers must perform. (markt)

### 2022-07-20 Tomcat 9.0.65 (remm)

#### Catalina

- 66104: Avoid error message by not trying to clean up old files from the logging directory before the directory has been created. Based on #521 by HanLi. (markt)

#### Coyote

- Provide dedicated loggers (`org.apache.tomcat.util.net.NioEndpoint.handshake` / `org.apache.tomcat.util.net.Nio2Endpoint.handshake`) for TLS handshake failures. (markt)
- Enable the use of the FIPS provider for TLS enabled Connectors when using Tomcat Native 1.2.34 onwards built with OpenSSL 3.0.x onwards. (markt)
- Deprecated the `jvmRoute` system property used to configure a default value for the `jvmRoute` attribute of an Engine. (markt)
- Fix duplicate Poller registration with HTTP/2, NIO and async IO that could cause HTTP/2 connections to unexpectedly fail. (markt)

#### Jasper

- Add support for specifying Java 19 (with the value `19`) as the compiler source and/or compiler target for JSP compilation. If used with an Eclipse JDT compiler version that does not support these values, a warning will be logged and the default will used. (markt)

#### Web applications

- Documentation. 62245: Include `contextXsltFile` when discussing options for configuring directory listings. (markt)
- Examples. Fix CVE-2022-34305, a low severity XSS vulnerability in the Form authentication example. (markt)
- Documentation. Expand the description of the `useSendfile` attribute for HTTP/2 and reference the possibility of file locking when using this feature on Windows operating systems. (markt)

#### Other

- Update to bnd 6.3.1. (markt)
- The minimum Ant version required to build Tomcat 9.0.x is now 1.10.2. (markt)
- Add additional automation to the build process to reduce the number of manual steps that release managers must perform. (schultz)
- Implement support for reproducible builds. Reproducible builds are independent of operating system but require the same Ant version and same JDK (vendor and version) to be used as associated version information is embedded in a number of build outputs such as JAR file manifests. (markt)
- Update the packaged version of the Tomcat Native Library to 1.2.34 to improve the support for building with OpenSSL 3.0.x.(markt)
- Remove and/or update references to the removed `org.apache.tomcat.util.threads.res` package. The `LocalStrings*.properties` files in that package were moved to `org.apache.tomcat.util.threads` package for consistency with the rest of the Tomcat code base.
- 66134: The NSIS based Tomcat installer for Windows now correctly handles the combination of `TomcatAdminRoles` defined in a configuration file and selecting the Manager and/or Host Manager web applications in the installer's GUI. (markt)
- Update the OWB module to Apache OpenWebBeans 2.0.27. (remm)
- Update the CXF module to Apache CXF 3.5.3. (remm)
- Improvements to French translations. (remm)
- Improvements to Japanese translations contributed by tak7iji. (markt)
- Update the packaged version of the Tomcat Native Library to 1.2.35 to pick up Windows binaries built with OpenSSL 1.1.1q.(markt)

### 2022-06-09 Tomcat 9.0.64 (remm)

#### Catalina

- Update the memory leak protection code to support stopping application created executor threads when running on Java 19 and later. (markt)
- Improve the error message if a required `--add-opens` option is missing. (markt)
- Disable the memory leak correction code enabled by the Context attribute `clearReferencesObjectStreamClassCaches` when running on a JRE that includes a fix for the underlying memory leak. (markt)
- #515: Avoid deadlock on startup with some utility executor configurations. Submitted by Han Li. (remm)
- 66068: Ensure that the changes made to a request by the `RemoteIPValve` persist after the request is put into asynchronous mode. (markt)
- Include the major version in the recommended version used for Tomcat Native with the `AprLifecycleListener`. (markt)

#### Coyote

- Additional fix for 65118. Fix a potential `NullPointerException` when pruning closed HTTP/2 streams from the connection. (markt)
- 66076: When using TLS with non-blocking writes and the NIO connector, ensure that flushing the buffers attempts to empty all of the output buffers. (markt)
- 66084: Correctly calculate bytes written to a response. Pull request #516 provided by aooohan HanLi. (markt)
- Correct a regression in the support added for encrypted PKCS#1 formatted private keys in the previous release that broke support for unencrypted PKCS#1 formatted private keys. (jfclere/markt)
- Remove support for NPN when using the Tomcat Native Connector as NPN was never standardised and browser support for NPN was removed several years ago. (markt)

#### Jasper

- Update `ImportHandler` optimisation for new classes introduced in Java 19. (markt)

#### Web applications

- 66064: Update the building page in the documentation web application to reflect changes in required Java version and source repository. (markt)
- Documentation. Make the description of the HTTP/1.1 configuration attributes that control the maximum allowed HTTP header size more specific. (markt)

#### Tribes

- Increase the default buffer size for replication messages from 43800 to 65536 bytes. This is expected to improve performance for large messages when running on Linux based systems. (markt)

#### Other

- Improvements to French translations. (remm)
- Improvements to Japanese translations contributed by Shirayuking and tak7iji. (markt)
- Improvements to Chinese translations contributed by Dingzi2012. (markt)

### 2022-05-16 Tomcat 9.0.63 (remm)

#### Catalina

- 65736: Disable the `forceString` option for the JNDI `BeanFactory` and replace it with an automatic search for an alternative setter with the same name that accepts a `String`. This is a security hardening measure. (markt)
- 65853: Refactor the `CsrfPreventionFilter` to make it easier for sub-classes to modify the nonce generation and storage. Based on suggestions by Marvin Fröhlich. (markt)
- 65991: Avoid NPE with `SSLAuthenticator` when `boundOnInit` is used on a connector, during the check for client certificate authentication availability. (remm)
- 66009: Use `getSubjectX500Principal().toString()` rather than `getSubjectX500Principal().getName(...)` to retrieve a certificate DN, to match the output of the deprecated `getSubjectDN().getName()` that was used previously. (remm)
- Revert the change in 9.0.59 that added a mapping of `Shift_JIS` for the `ja` locale to the default mappings used by `ServletResponse.setLocale()` as it caused regressions for applications using UTF-8. (markt)
- Provide a property source that sources values from Kubernetes service bindings. Pull request #512 provided by Sumit Kulhadia and Gareth Evans. (markt)

#### Coyote

- #501: Add new `maxHttpRequestHeaderSize` and `maxHttpResponseHeaderSize` attributes which allow setting the maximum HTTP header sizes independently. If not specified, the value of the `maxHttpHeaderSize` connector attribute will be used. Submitted by Zhongming Hua. (remm)
- The root cause of the Linux kernel duplicate accept bug has been identified along with the version of the kernel that includes the fix. The error message displayed when this bug occurs has been updated to reflect this new information and to advise users to update to a version of the OS that uses kernel 5.10 or later. Thanks to Christopher Gual for the research into this issue. (markt)
- 66023: Improve the fix for 65726 and support HTTP upgrade with a request body for a wider set of use cases. (markt)
- Add support for encrypted PKCS#1 formatted private keys when configuring the internal, in memory key store. Based on #511. (jfclere/markt)
- Remove the `prestartminSpareThreads` attribute of the `StandardThreadExecutor` since all core threads are always started by default making this attribute meaningless. Pull request #510 provided by Aooohan. (markt)

#### Webapps

- 66008: In the documentation web application, clarify the recommendation for the use the `trimSpaces` option for Jasper in production environments. (markt)
- Update the documentation web application to state that the `EncryptInterceptor` does not provide sufficient protection to run Tomcat clustering over an untrusted network. This is CVE-2022-29885. (markt)

#### Other

- Improvements to French translations. (remm)
- Improvements to German translations contributed by Thomas Hoffmann. (markt)
- Improvements to Japanese translations contributed by Shirayuking. (markt)
- Improvements to Korean translations. (woonsan)
- Update to Commons Daemon 1.3.1. This fixes a known regression in 1.3.0 when configuring the Windows service with custom scripts as described in 66055. (markt)
- Update to JSign 4.1. (markt)
- Update the packaged version of the Tomcat Native Library to 1.2.33 to pick up Windows binaries built with OpenSSL 1.1.1o.(markt)

### 2022-04-01 Tomcat 9.0.62 (remm)

#### Catalina

- Effectively disable the `WebappClassLoaderBase.getResources()` method as it is not used and if something accidentally exposes the class loader this method can be used to gain access to Tomcat internals. (markt)

### not released Tomcat 9.0.61 (remm)

#### Catalina

- Harden the CredentialHandler implementations by switching to a constant-time implementation for credential comparisons. (schultz/markt)

#### Coyote

- Use a constant for the default TLS cipher suite. This will allow skipping setting it in some cases (for example, it does not make sense for OpenSSL TLS 1.3). (remm)
- #487: Improve logging of unknown settings frames. Pull request by Thomas Hoffmann. (remm)
- 65975: Add a warning if a TLS virtual host is configured with optional certificate authentication and the containing connector is also configured to support HTTP/2 as HTTP/2 does not permit optional certificate authentication. (markt)
- 65975: Add a warning if a TLS virtual host is configured for TLS 1.3 with a JSSE implementation and a web application is configured for `CLIENT-CERT` authentication. `CLIENT-CERT` authentication requires post-handshake authentication (PHA) when used with TLS 1.3 but the JSSE TLS 1.3 implementation does not support PHA. (markt)
- Improve the recycling of Processor objects to make it more robust. (markt)

#### Jasper

- 65959: Serialize Function as String[] rather Class[]. (remm)

#### Web applications

- 65952: Align `--add-opens` configuration for jsvc with the current Tomcat scripts. (markt)
- Correct the AJP and HTTP/1.1 Connector configuration pages in the documentation web application to show which attributes are applicable to all Connectors and which are implementation specific. (markt)

#### Other

- Correct a spelling mistake in the German translations. Thanks to Thomas Hoffmann. (markt)
- 65951: Use the `tomcat.output` property for OSGi bundle manifest paths. (isapir)
- Update to Commons Daemon 1.3.0. (markt)
- Update to Checkstyle 10.0. (markt)
- Update to SpotBugs 4.6.0. (markt)
- Expand the `spotbugs` Ant task to also cover test code. (markt)
- Update to bnd 6.2.0. (markt)
- Remove OSGi annotations dependency as it is no longer required with bnd 6.2.0. (markt)
- Refactor the resource files for the Apache Tomcat installer for Windows so that all the resource files are located in a single directory in the source tree. (markt)
- Update the packaged version of the Tomcat Native Library to 1.2.32 to pick up Windows binaries built with OpenSSL 1.1.1n.(markt)
- Improvements to Chinese translations contributed by 15625988003. (markt)
- Improvements to French translations. (remm)
- Improvements to Japanese translations contributed by tak7iji. (markt)
- Expand coverage of translations for `jakarta.el` package. Based on #488 from Volodymyr Siedlecki. (markt)

### 2022-03-14 Tomcat 9.0.60 (remm)

#### Catalina

- 65921: The `type` substitution flag for the rewrite valve should set the content type for the response, not the request. (markt)
- #479: Enable the rewrite valve to redirect requests when the original request cannot be mapped to a context. This typically happens when no ROOT context is defined. Pull request by elkman. (markt)
- 65940: Fix `NullPointerException` if an exception occurs during the destruction of a Servlet. (markt)

#### Coyote

- Fix regression introduced with 65757 bugfix which better identified non request threads but which introduced a similar problem when user code was doing sequential operations in a single thread. Test case code submitted by Istvan Szekely. (remm)
- Fix potential thread-safety issue that could cause HTTP/1.1 request processing to wait, and potentially timeout, waiting for additional data when the full request has been received. (markt)
- Throw `IOException` rather than `IllegalStateException` when the application attempts to write to an HTTP/2 stream after the client has closed the stream. (markt)

#### Jasper

- When resolving methods in EL expressions that use beans and/or static fields, ensure that any custom type conversion is considered when identifying the method to call. (markt)

#### Web applications

- Correct the name of the `value` attribute in the new documentation of `OpenSSLConfCmd` elements. (rjung)

### 2022-02-28 Tomcat 9.0.59 (remm)

#### Catalina

- Add `ha-api-*.jar` and `jaxws-rt-*.jar` to the list of JARs to skip when scanning for TLDs, web fragments and annotations. (michaelo)
- Expand the default mappings used by `ServletResponse.setLocale()` to include a mapping from the `ja` locale to the `Shift_JIS` encoding. (markt)
- 65806: Improve the handling of session ID generation when the default algorithm for `SecureRandom` (`SHA1PRNG`) is not supported by the configured providers as will be the case for a FIPS compliant configuration. (markt)
- #464: Fall back to the class loader used to load JULI when the thread context class loader is not set. In a normal Tomcat configuration, this will be the system class loader. Based on a pull request by jackshirazi. (markt)
- #469: Include the Java Annotations API in the classes that Tomcat will not load from web applications. Pull request provided by ppkarwasz. (markt)
- #472: Add support for additional user attributes to `TomcatPrincipal` and `GenericPrincipal`. Patch provided by Carsten Klein. (michaelo)
- Fix a potential `StringIndexOutOfBoundsException` exception when generating a WebDAV multi-status response after an error during a copy or delete. Report the paths relative to the server root for any resources with an error. (markt)
- Improve the format of WebDAV XML responses to make them easier for humans to read. The change ensures that there is always a line break before starting a new element. (markt)
- Improve validation of the `Destination` header for WebDAV `MOVE` and `COPY` requests. (markt)

#### Coyote

- Correct a regression in the fix for 65454 that meant that `minSpareThreads` and `maxThreads` settings were ignored when the Connector used an internal executor. (markt)
- 65776: Improve the detection of the Linux duplicate accept bug and reduce (hopefully avoid) instances of false positives. (markt)
- 65848: Revert the change that attempted to align the behaviour of client certificate authentication with NIO or NIO2 with OpenSSL for TLS between MacOS and Linux/Windows as the root cause was traced to configuration differences. (markt)
- #467: When system time moves backwards (e.g. after clock correction), ensure that the cached formatted current date used for HTTP headers tracks this change. Pull request provided by zhenguoli. (markt)

#### Jasper

- #474: Prevent a tag file from corrupting the ELContext of the calling page. Pull request provided by Dmitri Blinov. (markt)
- Minor optimisation of serialization for `FunctionMapperImpl` in response to pull request #476. (markt)

#### Web applications

- Remove the applet example from the example web application as applets are no longer supported in any major browser. (markt)
- Refactor a small number of pages in the examples web application to avoid an issue with reproducible builds due to differences in file ordering across different operating systems with Ant's zip task. (markt)
- Better documentation for the `protocol` attribute of the `JNDIRealm`. (markt)
- Clarify the settings described in the documentation web application to configure a cluster using static membership. (markt)
- Add information on the `OpenSSLConf` and `OpenSSLConfCmd` elements to the HTTP SSL configuration page in the documentation web applications. (markt)

#### jdbc-pool

- Use LF line endings for text files in JARs to support reproducible builds across different operating systems. (markt)

#### Other

- Switch to building with Java 11 and using `--release` to target Java 8. Once back-ported to all currently supported branches, this will reduce the number of Java versions developers need to juggle. (markt)
- Use LF line endings for text files in JARs to support reproducible builds across different operating systems. (markt)
- Fix dependencies for individual test targets in Ant build file. Based on #468 provided by Totoo chenyonghui. (markt)
- Update the OWB module to Apache OpenWebBeans 2.0.26. (remm)
- Revert the cherry-pick of JavaDoc fix from DBCP applied in 9.0.57 that broke the `DataSourceMXBean` by using a type that isn't supported by MXBeans. (markt)

### 2022-01-20 Tomcat 9.0.58 (remm)

#### Coyote

- Correct a regression in the fix for 65785 that broke HTTP/2 server push. (markt)

### not released Tomcat 9.0.57 (remm)

#### Catalina

- Add additional locking to `DataSourceUserDatabase` to provide improved protection for concurrent modifications. (markt)
- Add recycling check in the input and output stream isReady to try to give a more informative ISE when the facade has been recycled. (remm)
- Remove the deprecated `JmxRemoteLifecycleListener`. (markt)
- Make the calculation of the session storage location more robust when using file based persistent storage. (markt)

#### Coyote

- 65726: Implement support for HTTP/1.1 upgrade when the request includes a body. The maximum permitted size of the body is controlled by `maxSavePostSize`. (markt)
- Restore pre-starting of `minSpareThreads` lost in the fix for 65454. (markt)
- Revert the previous fix for 65714 and implement a more comprehensive fix. (markt)
- 65757: Missing initial IO listener notification on Servlet container dispatch to another container thread. (remm)
- Expand the fix for 65757 so that rather than just checking if processing is happening on a container thread, the check is now if processing is happening on the container thread currently allocated to this request/response. (markt)
- Improve the fix for RST frame ordering added in 9.0.56 to avoid a potential deadlock on some systems in non-default configurations. (markt)
- 65767: Add support for certificates that use keys encrypted using PBES2. Based on a pull request provided by xiezhaokun. (markt)
- Refactor testing whether a String is a valid HTTP token. (markt)
- 65785: Perform additional validation of HTTP headers when using HTTP/2. (markt)
- When a Connector or Endpoint is paused, ensure that only new connections and new requests on existing connections are stopped while allowing in progress requests to run to completion. (markt)
- Explicitly release ByteBuffer instances associated with pooled channels when stopping the NioEndpoint and Nio2Endpoint. (markt)
- Narrow the scope of the logging of invalid cookie headers to just the invalid cookie rather than the whole cookie header. (markt)

#### Jasper

- 65724: Fix missing messages for some `PropertyNotWritableException`s caused by a typo in the name used for a resource string. (markt)
- Add support for specifying Java 18 (with the value `18`) as the compiler source and/or compiler target for JSP compilation. If used with an Eclipse JDT compiler version that does not support these values, a warning will be logged and the default will used. (markt)

#### WebSocket

- Add support for POJO WebSocket endpoints to the programmatic upgrade that allows applications to opt to upgrade an HTTP connection to WebSocket. (markt)
- 65763: Improve handling of WebSocket connection close if a message write times out before the message is fully written. (markt)

#### Other

- Update the OWB module to Apache OpenWebBeans 2.0.25. (remm)
- Update the CXF module to Apache CXF 3.5.0. (remm)
- Improvements to Chinese translations contributed by zhnnn. (markt)
- Improvements to French translations. (remm)
- Improvements to Japanese translations contributed by Shirayuking, yoshy and tak7iji. (markt)
- Improvements to Korean translations. (woonsan)
- Update SpotBugs to 4.5.2. (markt)
- Update the NSIS installer to 3.08. (markt)
- Update UnboundID to 6.0.3. (markt)
- Update CheckStyle to 9.2.1. (markt)
- Update BND to 6.1.0. (markt)
- Update OSGI annotations to 1.1.1. (markt)

### 2021-12-02 Tomcat 9.0.56 (remm)

#### Catalina

- Make SPNEGO authentication more robust for the case where the provided credential has expired. (markt)
- 65684: Fix a potential `NullPointerException` when using JULI. (markt)
- Document conditions under which the `AprLifecycleListener` can be used to avoid JVM crashes. (michaelo)
- Refactor the `AsyncFileHandler` to reduce the possibility of log messages being lost on shutdown. (markt)
- Refactor the `AsyncFileHandler` to remove the need for the `org.apache.juli.AsyncLoggerPollInterval`. If set, this property now has no effect. (markt)
- Add debug logging to the `RestCsrfPreventionFilter`. Based on pull request #452 by Polina Georgieva. (markt)
- 65710: Implement a workaround for a JVM bug that can trigger a file descriptor leak when using multi-part upload and the application does not explicitly close an input stream for an uploaded file that was cached on disk. (markt)

#### Coyote

- Improve error handling if APR/Native fails to attach TLS capabilities to a TLS enabled client connection. (markt)
- Improve error handling if APR/Native fails to accept an incoming connection. (markt)
- Provide protection against a known OS bug that causes the acceptor to report an incoming connection more than once. (markt)
- Avoid unnecessary duplicate read registrations for blocking I/O with the NIO connector. (markt)
- 65677: Improve exception handling for errors during HTTP/1.1 reads with NIO2. (markt)
- Refactor APR/native connector shutdown to remove a potential source of JVM crashes on shutdown when sendfile is used. (markt)
- When an error occurs that triggers a stream reset, ensure that the first `RST` frame sent to the client is the one associated with the error that triggered the reset. (markt)
- 65714: Fix exceptions when the security manager is enabled and the first request received after starting is an HTTP request to a TLS enabled NIO2 connector. (markt)
- Ensure that using NIO or NIO2 with OpenSSL for TLS behaves the same way on MacOS as it does on Linux and Windows when no trusted certificate authorities are configured and reject all client certificates. (markt)
- Avoid a potential deadlock during the concurrent processing of incoming HTTP/2 frames for a stream and that stream being reset. (markt)

#### Other

- Switch from Cobertura to JaCoCo for code coverage as Cobertura does not support code coverage for code compiled for Java 11 onwards. It also removes the need to use a single thread to run the tests. (markt)

### 2021-11-10 Tomcat 9.0.55 (remm)

#### Catalina

- Improve robustness of JNDIRealm for exceptions occurring when getting the connection. Also add missing close when running into issues getting the passord of a user. (remm)
- Add Javadoc comment which listeners must be nested within `Server` elements only. (michaelo)
- Add support for custom caching strategies for web application resources. This initial implementation allows control over whether or not a resource is cached. (markt)
- Log warning if a listener is not nested inside a Server element although it must have been. (michaelo)

#### Coyote

- Improve performance of Connector shutdown - primarily to reduce the time it takes to run the test suite. (markt)
- Refactor the APR/native connector shutdown to reduce the possibility of a JVM crash during the connector shutdown. (markt)
- #457: Add a `toString()` method to `MimeHeader` to aid debugging. (dblevins)
- Add experimental OpenSSL support through the Panama API incubating in Java 17, with support for OpenSSL 1.1+. This no longer requires tomcat-native or APR. Please refer to the `openssl-java17` module from the `main` branch for more details. (remm)
- Fix APR connector stop so it correctly waits for the sendfile thread, if any, to exit. (markt)
- Do not ignore the error condition if the APR connector is not able to open a server socket as continuing in this case will trigger a JVM crash. (markt)
- Fix a potential JVM crash when using the APR/Native connector with TLS. A crash could occur if the connector was stopped whilst a connection was performing a TLS handshake. (markt)

#### Jasper

- Regenerate the EL parser using JavaCC 7.0.10. (markt)
- Fix a bug that prevented the EL parser correctly parsing a literal Map that used variables rather than literals for both keys and values. (markt)

#### WebSocket

- Add a new method `WsServerContainer.upgradeHttpToWebSocket()` to align with the new method that will be available from WebSocket 2.1 onwards. (markt)

#### Tribes

- #454: Differentiate warning messages in `KubernetesMembershipProvider` so that the missing attribute is clear to the user. PR provided by Hal Deadman. (markt)

### 2021-10-01 Tomcat 9.0.54 (remm)

#### Catalina

- Provide the DataSource in the constructor of `DataSourceUserDatabase`, since it is always global. (remm)
- Fix delete then create object manipulations with `DataSourceUserDatabase`. (remm)
- 65553: Implement a work-around for a JRE bug that can trigger a memory leak when using the JNDI realm. (markt)
- 65586: Fix the bloom filter used to improve performance of archive file look ups in the web resources implementation so it works correctly for directory lookups whether or not the provided directory name includes the trailing `/`. (markt)
- #451: Improve the usefulness of the thread name cache used in JULI. Pull request provided by t-gergely. (markt)

#### Coyote

- 65563: Correct parsing of HTTP `Content-Range` headers. Tomcat was incorrectly requiring an `=` character after `bytes`. Fix based on pull request #449 by Thierry Guérin. (markt)
- Correct a potential `StackOverflowException` with HTTP/2 and sendfile. (markt)
- Further improvements in the management of the connection flow control window. This addresses various bugs that caused streams to incorrectly report that they had timed out waiting for an allocation from the connection flow control window. (markt)
- 65577: Fix a `AccessControlException` reporting when running an NIO2 connector with TLS enabled. (markt)
- Reclassify TLS ciphers that use AESCCM8 as medium security rather than high security to align with recent changes in OpenSSL. (markt)
- Fix an issue that caused some Servlet non-blocking API reads of the HTTP request body to incorrectly use blocking IO. (markt)

#### Jasper

- Fix the implementation of `MethodExpression.getMethodInfo()` so that it returns the expected value rather than failing when the method expression is defined with the parameter values in the expression rather than the types being passed explicitly to `ExpressionFactory.createMethodExpression()`. (markt)

#### WebSocket

- The internal upgrade handler should close the associated `WebConnection` on destroy. (remm)

#### Web applications

- Clarify the JASPIC configuration options in the documentation web application. (markt)

#### Other

- 65585: Update obsolete comments at the start of the `build.properties.default` file. (markt)

### 2021-09-10 Tomcat 9.0.53 (remm)

#### Catalina

- Enable Tomcat to start if an (old) XML parser is configured that does not support `allow-java-encodings`. A warning will be logged if such an XML parser is detected. (markt)
- Change the behaviour of custom error pages. If an error occurs after the response is committed, once the custom error page content has been added to the response the connection is now closed immediately rather than closed cleanly. i.e. the last chunk that marks the end of the response body is no longer sent. This acts as an additional signal to the client that the request experienced an error. (markt)
- 65479: When handling requests using JASPIC authentication, ensure that `PasswordValidationCallback.getResult()` returns the result of the password validation rather than always returning `false`. Fixed via pull request #438 provided by Robert Rodewald. (markt)
- Refactor the authenticators to delegate the check for preemptive authentication to the individual authenticators where an authentication scheme specific check can be performed. Based on pull request #444 by Robert Rodewald. (markt)
- Improve the reusability of the `UserDatabase` by adding intermediate concrete implementation classes and allowing to do partial database updates on `save`. (remm)
- Add a `UserDatabase` implementation as a superset of the `DataSourceRealm` functionality. (remm)
- Make sure the dynamic Principal returned by `UserDatabaseRealm` stays up to date with the database contents, and add an option to have it be static, similar to the other realms. (remm)
- Add `derby-*.jar` to the list of JARs to skip when scanning for TLDs, web fragments and annotations. (markt)
- #447. Correct JPMS metadata for catalina.jar. Pull request provided by Hui Wang. (markt)

#### Coyote

- Correct a logic error that meant setting `certificateKeystoreFile` to `NONE` did not have the expected effect. `NONE` was incorrectly treated as a file path. Patch provided by Mikael Sterner. (markt)
- 65505: When an HTTP header value is removed, ensure that the order of the remaining header values is unchanged. (markt)

#### WebSocket

- 65506: Fix write timeout check that was using the read timeout value. Patch submitted by Gustavo Mahlow. (remm)

#### Web applications

- Remove unnecessary Context settings from the examples web application. (markt)
- Document default value for `unpackWARs` and related clean-up. Pull request #439 provided by Robert Rodewald. (markt)
- Clarify the documentation of the `compressionMinSize` and `compressibleMimeType` HTTP `Connector` attributes. Pull request #442 provided by crisgeek. (markt)

#### Other

- Fix failing build when building on non-English locales. Pull request #441 provided by Dachuan J. (markt)
- Update to JSign version 4.0 to enable code signing without the need for the installation of additional client tools. (markt)
- Update the internal fork of Apache Commons BCEL to 40d5eb4 (2021-09-01, 6.6.0-SNAPSHOT). Code clean-up only. (markt)
- Update the internal fork of Apache Commons Codec to fd44e6b (2021-09-01, 1.16-SNAPSHOT). Minor refactoring. (markt)
- Add Apache Derby 10.14.2.0 to the testsuite dependencies, for JDBC and DataSource testing. (remm)
- 65661: Update the internal fork of Apache Commons FileUpload to 33d2d79 (2021-09-01, 2.0-SNAPSHOT). Refactoring and code clean-up. As a result of Commons File Upload now using `java.nio.file.Files`, applications using multi-part uploads need to ensure that the JVM is configured with sufficient direct memory to store all in progress multi-part uploads. (markt)
- Update the internal fork of Apache Commons Pool to 2.11.1 (2021-08-17). Improvements, code clean-up and refactoring. (markt)
- Update the internal fork of Apache Commons DBCP to 2.9.0 (2021-08-03). Improvements, code clean-up and refactoring. (markt)
- Update the packaged version of the Tomcat Native Library to 1.2.31 to pick up Windows binaries built with OpenSSL 1.1.1l.(markt)
- Switch to the CDN as the primary download location for ASF dependencies. (markt)
- Improvements to Chinese translations contributed by syseal, wolibo, ZhangJieWen and DigitalFatCat. (markt)
- Improvements to Japanese translations contributed by tak7iji. (markt)
- Improvements to Korean translations. (woonsan)

### 2021-08-06 Tomcat 9.0.52 (remm)

#### Catalina

- 65476: Correct an error in some code clean-up that mean that web application classes were not configured with the correct package. (markt)

### not released Tomcat 9.0.51 (remm)

#### Catalina

- 65411: Always close the connection when an uncaught `NamingException` occurs to avoid connection locking. Submitted by Ole Ostergaard. (remm)
- 65433: Correct a regression in the fix for 65397 where a `StringIndexOutOfBoundsException` could be triggered if the canonical path of the target of a symlink was shorter than the canonical path of the directory in which the symlink had been created. Patch provided by Cedomir Igaly. (markt)
- 65443: Refactor the `CorsFilter` to make it easier to extend. (markt)
- To avoid unnecessary cache revalidation, do not add an HTTP `Expires` header when setting adding an HTTP header of `CacheControl: private`. (markt)

#### Coyote

- When writing an HTTP/2 response via sendfile (only enabled when `useAsyncIO` is true) the connection flow control window was sometimes ignored leading to various error conditions. sendfile now checks both the stream and connection flow control windows before writing. (markt)
- Add debug logging for writing an HTTP/2 response via sendfile. (markt)
- Correct bugs in the HTTP/2 connection flow control management that meant it was possible for a connection to stall waiting for a connection flow control window update that had already arrived. Any streams on that connection that were trying to write when this happened would time out. (markt)
- 65448: When using TLS with NIO, it was possible for a blocking response write to hang just before the final TLS packet associated with the response until the connection timed out at which point the final packet would be sent and the connection closed. (markt)
- 65454: Fix a race condition that could result in a delay to a new request. The new request could be queued to wait for an existing request to finish processing rather than the thread pool creating a new thread to process the new request. (markt)
- 65460: Correct a regression introduced in the previous release in the change to reduce the number of small HTTP/2 window updates sent for streams. A logic error meant that small window updates for the connection were dropped. This meant that the connection flow window slowly reduced over time until nothing could be sent. (markt)

#### Web applications

- 65404: Correct a regression in the fix for 63362 that caused the server status page in the Manager web application to be truncated if HTTP upgrade was used such as when starting a WebSocket connection. (markt)

#### Other

- Improvements to Chinese translations contributed by ZhangJieWen and chengzheyan. (markt)
- Improvements to French translations. (remm)
- Improvements to Japanese translations contributed by tak7iji. (markt)
- Improvements to Korean translations. (woonsan)
- Use of GraalVM native images no longer automatically disables JMX support. JMX support may still be disabled by calling `org.apache.tomcat.util.modeler.Registry.disableRegistry()`. (markt)

### 2021-07-02 Tomcat 9.0.50 (remm)

#### Jasper

- Jakarta to Javax backport issue in tests. (remm)

### not released Tomcat 9.0.49 (remm)

#### Catalina

- Refactor the `RemoteIpValve` to use the common utility method for list to comma separated string conversion. (markt)
- Refactor `JNDIRealm$JNDIConnection` so its fields are accessible to sub-classes of `JNDIRealm`. (markt)
- Fix serialization warnings in `UserDatabasePrincipal` reported by SpotBugs. (markt)
- 65397: Calls to `ServletContext.getResourcePaths()` no longer include symbolic links in the results unless `allowLinking` has been set to `true`. If a resource is skipped because of this change, a warning will be logged as this typically indicates a configuration issue. (markt)

#### Coyote

- 65368: Improve handling of clean closes of inbound TLS connections. Treat them the same way as clean closes of non-TLS connections rather than as unknown errors. (markt)
- Modify the HTTP/2 connector not to sent small updates for stream flow control windows to the user agent as, depending on how the user agent is written, this may trigger small writes from the user agent that in turn trigger the overhead protection. Small updates for stream flow control windows are now combined with subsequent flow control window updates for that stream to ensure that all stream flow control window updates sent from Tomcat are larger than `overheadWindowUpdateThreshold`. (markt)
- Add additional debug logging to track the current state of the HTTP/2 overhead count that Tomcat uses to detect and close potentially malicious connections. (markt)
- Many HTTP/2 requests from browsers will trigger one overhead frame and one non-overhead frame. Change the overhead calculation so that a non-overhead frame reduces the current overhead count by 2 rather than 1. This means that, over time, the overhead count for a well-behaved connection will trend downwards. (markt)
- Change the initial HTTP/2 overhead count from `-10` to `-10 * overheadCountFactor`. This means that, regardless of the value chosen for `overheadCountFactor`, when a connection opens 10 overhead frames in a row will be required to trigger the overhead protection. (markt)
- Increase the default `overheadCountFactor` from `1` to `10` and change the reduction in overhead count for a non-overhead frame from `-2` to `-20`. This allows for a larger range (0-20) to be used for `overheadCountFactor` providing for finer-grained control. (markt)
- Modify the parsing of HTTP header values that use the `1#token` to ignore empty elements as per RFC 7230 section 7 instead of treating the presence of empty elements as an error. (markt)
- Expand the unit tests for `HttpServlet.doHead()` and correct the flushing of the response buffer. The buffer used to behave as if it was one byte smaller than the configured size. The buffer was flushed (and the response committed if required) when the buffer was full. The buffer is now flushed (and the response committed if required) if the buffer is full and there is more data to write. (markt)
- Fix an issue where concurrent HTTP/2 writes (or concurrent reads) to the same connection could hang and eventually timeout when async IO was enabled (it is enabled by default). (markt)

#### Jasper

- 65390: Correct a regression in the fix for 65124 and restore code that was removed in error leading to JSP compilation failures in some circumstances. (markt)
- Update to the Eclipse JDT compiler 4.20. (markt)
- Add support for specifying Java 17 (with the value `17`) as the compiler source and/or compiler target for JSP compilation. If used with an Eclipse JDT compiler version that does not support these values, a warning will be logged and the latest supported version will used. (markt)
- 65377: Update the Java code generation for JSPs not to use the boxed primitive constructors as they have been deprecated in Java 9 and marked for future removal in Java 16. `valueOf()` is now used instead. (markt)

#### WebSocket

- Refactor the `DigestAuthenticator` to reuse a shared `SecureRandom` instance rather than create a new one to generate the `cnonce` if required. (markt)

#### Web applications

- 65385: Correct the link in the documentation web application the Maven Central repository. (markt)

#### Other

- Update the OWB module to Apache OpenWebBeans 2.0.23. (remm)
- Update the CXF module to Apache CXF 3.4.4. (remm)
- 65369 / #422: Add the additional `--add-opens=...` options required for running Tomcat on Java 16 onwards to the `service.bat` script to align it with the other start-up scripts. PR provided by MCMicS. (markt)
- Update JUnit to version 4.13.2. (markt)
- Update EasyMock to 4.3. (markt)
- Update Objenesis to 3.2. (markt)
- Update UnboundID to 6.0.0. (markt)
- Update CheckStyle to 8.43. (markt)
- Update SpotBugs to 4.2.3. (markt)
- Update OSGi annotations to 1.1.0. (markt)

### 2021-06-15 Tomcat 9.0.48 (remm)

#### Coyote

- Regression when generating reflection due to removed NIO classes in 9.0.47. (remm)

#### Other

- Use JSign to integrate the build script with the code signing service to enable release builds to be created on Linux as well as Windows. (markt)

### not released Tomcat 9.0.47 (remm)

#### Catalina

- 65301: `RemoteIpValve` will now avoid getting the local host name when it is not needed. (remm)
- 65308: NPE in JNDIRealm when no `userRoleAttribute` is given. (fschumacher)
- #412: Add commented out, sample users for the Tomcat Manager app to the default `tomcat-users.xml` file. Based on a PR by Arnaud Dagnelies. (markt)
- #418: Add a new option, `pass-through`, to the default servlet's `useBomIfPresent` initialization parameter that causes the default servlet to leave any BOM in place when processing a static file and not to use the BOM to determine the encoding of the file. Based on a pull request by Jean-Louis Monteiro. (markt)
- Add `cookieName` attribute to the SSO valve to configure the SSO cookie name. (remm)
- #419: When processing POST requests of type `multipart/form-data` for parts without a filename that are added to the parameter map in String form, check the size of the part before attempting conversion to String. Pull request provided by tianshuang. (markt)
- 62912: Don't mutate an application provided content header if it does not contain a charset. Also remove the outdated workaround for the buggy Adobe Reader 9 plug-in for IE. (markt)
- AprLifecycleListener does not show dev version suffix for libtcnative and libapr. (michaelo)
- Refactor principal handling in `UserDatabaseRealm` using an inner class that extends `GenericPrincipal`. (remm)
- Enable the default `doHead()` implementation in `HttpServlet` to correctly handle responses where the content length needs to be represented as a long since it is larger than the maximum value that can be represented by an int. (markt)
- Avoid synchronization on roles verification for the memory `UserDatabase`. (remm)
- Fix the default `doHead()` implementation in `HttpServlet` to correctly handle responses where the Servlet calls `ServletResponse.reset()` and/or `ServletResponse.resetBuffer()`. (markt)
- Fix the default `doHead()` implementation in `HttpServlet` to correctly handle responses generated using the Servlet non-blocking API. (markt)

#### Coyote

- 64943: Add support for Unix Domain Sockets to `org.apache.coyote.http11.Http11AprProtocol`. Depends on `tomcat-native` 1.2.26 and up. (minfrin)
- 65303: Fix a possible `NullPointerException` if an error occurs on an HTTP/1.1 connection being upgraded to HTTP/2 or on a pushed HTTP/2 stream. (markt)
- 65311: Fix a race condition in the `NioBlockingSelector` that could cause a delay to select operations. (markt)
- Simplify AprEndpoint socket bind for all platforms. (michaelo)
- Add back simplification of NIO block read and write, now better validated in Tomcat 10. (remm)
- Optimize NIO selector handling for Java 11. (remm)
- 65340: Add missing check for a negative return value for `Hpack.decodeInteger` in the `HpackDecoder`, which could cause a `NegativeArraySizeException` exception. Submitted by Thomas, and verified the fix is present in the donated hpack code in a further update. (remm)
- Add debug logging for HTTP/2 HPACK header decoding. (markt)
- Correct parsing of HTTP headers consisting of a list of tokens so that a header with an empty token is treated consistently regardless of whether the empty token is at the start, middle or end of the list of tokens. (markt)
- Remove support for the `identity` transfer encoding. The inclusion of this encoding in RFC 2616 was an error that was corrected in 2001. Requests using this transfer encoding will now receive a 501 response. (markt)
- Process transfer encoding headers from both HTTP 1.0 and HTTP 1.1 clients. (markt)
- Ensure that if the transfer encoding header contains the `chunked`, that the `chunked` encoding is the final encoding listed. (markt)

#### Jasper

- Review code used to generate Java source from JSPs and tags and remove code found to be unnecessary. (markt)
- Refactor use of internal `ChildInfo` class to use compile time type checking rather than run time type checking. (markt)
- 65358: Improve expression language method matching for methods with varargs. Where multiple methods may match the provided parameters, the method that requires the fewest varargs is preferred. (markt)
- 65332: Add a commented out section in `catalina.policy` that provides the necessary permissions to compile JSPs with javac when running on Java 9 onwards with a security manager. It is commented out as it will cause errors if used with earlier Java versions. (markt)

#### WebSocket

- 65317: When using `permessage-deflate`, the WebSocket connection was incorrectly closed if the uncompressed payload size was an exact multiple of 8192. Based on a patch provided by Saksham Verma. (markt)
- 65342: Correct a regression introduced with the fix for 65262 that meant Tomcat's WebSocket implementation would only work with Tomcat's implementation of the Java EE WebSocket API. (markt)

#### Web applications

- Improve the description of the `maxConnections` and `acceptCount` attributes in the Connector section of the documentation web application. (markt)

#### Other

- Improvements to French translations. (remm)
- Improvements to Korean translations. (woonsan)
- 65362: Correct a regression in the previous release. The change to create OSGi `Require-Capability` sections in manifests for Jakarta API JARs manually rather than with bnd annotations did not add the necessary manual entries to the embedded JARs. (markt)
- Update the packaged version of the Tomcat Native Library to 1.2.30. Also update the minimum recommended version to 1.2.30. (markt)

### 2021-05-12 Tomcat 9.0.46 (markt)

#### Catalina

- Allow APR connector creation using the listener with the flag and the default `HTTP/1.1` protocol. (rjung/remm)
- Expand coverage of unit tests for JNDIRealm using the UnboundID LDAP SDK for Java. (markt)
- 65224: Ensure the correct escaping of attribute values and search filters in the JNDIRealm. (markt)
- 65235: Add missing attributes to the MBean descriptor file for the `RemoteIpValve`. (markt)
- 65244: HandlesTypes should include classes that use the specified annotation types on fields or methods. (remm)
- 65251: Correct a regression introduced in 9.0.44 that meant that the auto-deployment process may attempt a second, concurrent deployment of a web application that is being deployed by the Manager resulting in one of the deployments failing and errors being reported. (markt)
- Improve the `SSLValve` so it is able to handle escaped client certificate headers from Nginx. Based on a patch by Florent Guillaume. (markt)

#### Coyote

- Ensure that all HTTP requests that contain an invalid character in the protocol component of the request line are rejected with a 400 response rather than some requests being rejected with a 505 response. (markt)
- When generating the error message for an HTTP request with an invalid request line, ensure that all the available data is included in the error message. (markt)
- 65272: Restore the optional HTTP feature that allows `LF` to be treated as a line terminator for the request line and/or HTTP headers lines as well as the standard `CRLF`. This behaviour was previously removed as a side-effect of the fix for CVE-2020-1935. (markt)

#### Jasper

- Review code used to generate Java source from JSPs and tags and remove code found to be unnecessary. (markt)
- `<servlet>` entries in web.xml that include a `<jsp-file>` element and a negative `<load-no-startup>` element that is not the default value of `-1` will no longer be loaded at start-up. This makes it possible to define a `<jsp-file>` that will not be loaded at start-up. (markt)
- Allow the JSP configuration option `useInstanceManagerForTags` to be used with Tags that are implemented as inner classes. (markt)

#### WebSocket

- Refactor the way Tomcat passes path parameters to POJO end points to simplify the code. (markt)
- 65262: Refactor the creation of WebSocket end point, decoder and encoder instances to be more IoC friendly. Instances are now created via the `InstanceManager` where possible. (markt)

#### Web applications

- 65235: Correct name of `changeLocalName` in the documentation for the `RemoteIpValve`. (markt)
- 65265: Avoid getting the boot classpath when it is not available in the Manager diagnostics. (remm)

#### Other

- Create OSGi `Require-Capability` sections in manifests for Jakarta API JARs manually rather than via the `aQute.bnd.annotation.spi.ServiceConsumer` annotation as this triggers TCK failures for downstream consumers of the API JARs. (markt)
- Update the packaged version of the Tomcat Native Library to 1.2.28. (markt)
- Update the OWB module to Apache OpenWebBeans 2.0.22. (remm)
- Update the CXF module to Apache CXF 3.4.3. (remm)
- Move `SystemPropertySource` to be a regular class to allow more precise configuration if needed. The system property source will still always be enabled. (remm)
- Improvements to Chinese translations. Provided by bytesgo. (mark)
- Improvements to French translations. (remm)
- Improvements to Korean translations. (woonsan)

### 2021-04-06 Tomcat 9.0.45 (markt)

#### Catalina

- Avoid NPE when a JNDI reference cannot be resolved in favor of a NamingException. (remm)
- Avoid using reflection for setting properties on the webapp classloader. Based on a patch submitted by Romain Manni-Bucau. (remm)

#### Coyote

- Improve consistency of OpenSSL error stack handling in the TLS engine, and log all errors found as debug. (remm)
- Ensure that HTTP/2 streams are only recycled once as multiple attempts to recycle an HTTP/2 stream may result in `NullPointerException`s. (markt)
- Simplify the closing on an HTTP/2 stream when an error condition is present. (markt)
- 64771: Prevent concurrent calls to `ServletInputStream.isReady()` corrupting the input buffer. (markt)
- 65179: Ensure that the connection level flow control window from the client to the server is updated when handling DATA frames received for completed streams else the flow control window may become exhausted. (markt)
- 65203: Fix a regression introduced in 9.0.44 that meant that an error during an asynchronous read broke all future asynchronous reads associated with the same request instance. (markt)
- Disable keep-alive when inconsistent content delimitation is present in a request. (remm)

#### Jasper

- Include the new `org.apache.jasper.optimizations` package in the list of OSGi exported packages for the Jasper embedded JAR. Patch provided by Sokratis Zappis. (markt)
- Add a new option for the `trimSpaces` configuration. `extended` will attempt to remove leading and trailing whitespace from template text and collapse sequences of whitespace and newlines within template text into a single new line. Based on a pull request by kamnani. (markt)

#### Other

- Implement the first phase of reproducible builds. Sequential builds on the same machine now produce identical output provided that the Ant property `ant.tstamp.now` is set. The minimum required Ant version is now 1.9.10. (markt)
- Improvements to Chinese translations. Provided by Ruan Wenjun. (mark)
- Improvements to French translations. (remm)
- Improvements to Japanese translations. Provided by kfujino and Shirayuking. (markt)
- Improvements to Korean translations. (woonsan)
- Update the packaged version of the Tomcat Native Library to 1.2.27. (markt)

### 2021-03-10 Tomcat 9.0.44 (markt)

#### Catalina

- Revert an incorrect fix for a potential resource leak that broke deployment via the Ant deploy task. (markt)
- Improve error message for failed ConfigurationSource lookups in the Catalina implementation. (remm)
- 64938: Align the behaviour when `null` is passed to the `ServletResponse` methods `setCharacterEncoding()`, `setContentType()` and `setLocale()` with the recent clarification from the Jakarta Servlet project of the expected behaviour in these cases. (markt)
- 65135: Rename Context method `isParallelAnnotationScanning` to `getParallelAnnotationScanning` for consistency and ease of use in JMX descriptors. (remm)
- Ensure that the `AsyncListener.onError()` event is triggered when a I/O error occurs during non-blocking I/O. There were some cases discovered where this was not happening. (markt)
- Make the non-blocking I/O error handling more robust by handling the case where the application code swallows an `IOException` in `WriteListener.onWritePossible()` and `ReadListener.onDataAvailable()`. (markt)
- Correct syntax error in output of `JsonErrorReportValve`. Pull request provided by Viraj Kanwade. (markt)
- Make the `StandardContext.postWorkDirectory()` protected rather than private to help users wishing to customise the default work directory behaviour. (markt)

#### Coyote

- 65118: Fix a potential `NullPointerException` when pruning closed HTTP/2 streams from the connection. (markt)
- Avoid NullPointerException when a secure channel is closed before the SSL engine was initialized. (remm)
- Ensure that the `ReadListener`'s `onError()` event is triggered if the client closes the connection before sending the entire request body and the server is reading the request body using non-blocking I/O. (markt)
- 65137: Ensure that a response is not corrupted as well as incomplete if the connection is closed before the response is fully written due to a write timeout. (markt)
- Related to bug 65131, make sure all errors from OpenSSL are fully cleared, as there could be more than one error present after an operation (confirmed in the OpenSSL API documentation). (remm)
- Make handling of OpenSSL read errors more robust when plain text data is reported to be available to read. (markt)
- Correct handling of write errors during non-blocking I/O to ensure that the associated `AsyncContext` was closed down correctly. (markt)

#### Web applications

- 65136: Remove the restriction that prevented the Manager web application deploying different web applications in parallel. This required some refactoring, most notably to `HostConfig.check()` and how it is used. (markt)

#### Other

- Update the OWB module to Apache OpenWebBeans 2.0.21. (remm)
- Update the CXF module to Apache CXF 3.4.2. (remm)
- Improvements to French translations. (remm)
- Improvements to Korean translations. (woonsan)
- Improvements to Brazilian Portuguese translations. Provided by Thiago. (mark)
- Improvements to Russian translations. Provided by Azat. (mark)
- Improvements to Chinese translations. Provided by shawn. (mark)
- Update to bnd 5.3.0. (markt)

### 2021-02-02 Tomcat 9.0.43 (markt)

#### Catalina

- 65106: Fix the ConfigFileLoader handling of file URIs when running under a security manager on some JREs. (markt)

#### Coyote

- Ensure that SNI provided host names are matched to SSL virtual host configurations in a case insensitive manner. (markt)
- 65111: Free direct memory buffers in the APR connector. (remm)

### not released Tomcat 9.0.42 (markt)

#### Catalina

- 60781: Escape elements in the access log that need to be escaped for the access log to be parsed unambiguously. (fschumacher/markt)
- 64110: Add support for additional TLS related request attributes that provide details of the protocols and ciphers requested by a client in the initial TLS handshake. (markt)
- Let the `RemoteCIDRValve` inherit from `RequestFilterValve` and support all of its features. Especially add support for connector specific configuration using `addConnectorPort`. (rjung)
- Add `peerAddress` to coyote request, which contains the IP address of the direct connection peer. If a reverse proxy sits in front of Tomcat and the protocol used is AJP or HTTP in combination with the `RemoteIp(Valve|Filter)`, the peer address might differ from the `remoteAddress`. The latter then contains the address of the client in front of the reverse proxy, not the address of the proxy itself. Support for the peer address has been added to the RemoteAddrValve and RemoteCIDRValve with the new attribute `usePeerAddress`. This can be used to restrict access to Tomcat based on the reverse proxy IP address, which is especially useful to harden access to AJP connectors. The peer address can also be logged in the access log using the new `%{peer}a` syntax. (rjung)
- Avoid uncaught InaccessibleObjectException on Java 16 trying to clear references threads. (remm)
- 65033: Fix JNDI realm error handling when connecting to a failed server when pooling was not enabled. (remm)
- 65047: If the `AccessLogValve` is unable to open the access log file, include information on the current user in the associated log message (markt)

#### Coyote

- Additional fix for 64830 to address an edge case that could trigger request corruption with h2c connections. (markt)
- 64974: Improve handling of pipelined HTTP requests in combination with the Servlet non-blocking IO API. It was possible that some requests could get dropped. (markt)
- Add support for using Unix domain sockets for NIO when running on Java 16 or later. This uses NIO specific `unixDomainSocketPath` and `unixDomainSocketPathPermissions` attributes. Based on a PR submitted by Graham Leggett. (remm)
- 65001: Fix error handling for exceptions thrown from calls to `ReadListener` and `WriteListener`. (markt)
- Avoid possible infinite loop in `OpenSSLEngine.unwrap` when the destination buffers state is changed concurrently. (remm)

#### Jasper

- Add a new `StringInterpreter` interface that allows applications to provide customised string attribute value to type conversion within JSPs. This allows applications to provide a conversion implementation that is optimised for the application. (markt)
- 64965: `JspContextWrapper.findAttribute` should ignore expired sessions rather than throw an `IllegalStateException`. (remm)
- Update to the Eclipse JDT compiler 4.18. (markt)

#### Web applications

- 65007: Clarify that the commands shown in the TLS documentation for importing a signed TLS certificate from a certificate authority are typical examples that may need to be adjusted in some cases. (markt)

#### Tribes

- Work around DNS caching for the DNS provider of the cloud membership. (jfclere)

#### Other

- Improvements to Chinese translations. Provided by leeyazhou and Yi Shen. (markt)
- Improvements to French translations. (remm)
- Improvements to Korean translations. (woonsan)
- Update the packaged version of the Tomcat Native Library to 1.2.26. (markt)
- Update the internal fork of Apache Commons Pool to 2.9.1-SNAPSHOT (2021-01-15). (markt)
- Update the internal fork of Apache Commons DBCP to 2.9.0-SNAPSHOT (2021-01-15). (markt)
- Migrate to new code signing service. (markt)
- Use `java.nio.file.Path` to test for one directory being a sub-directory of another in a consistent way. (markt)
- Update to Commons Daemon 1.2.4. (markt)
- Improvements to Brazilian Portuguese translations. Provided by Rual Zaninetti Rosa and Lucas. (markt)
- Improvements to Russian translations. Provided by Polina and Azat. (markt)
- Update the NSIS Installer used to build the Windows installer to version 3.06.1. (kkolinko)

### 2020-12-08 Tomcat 9.0.41 (markt)

#### Catalina

- 56181: Update the RemoteIpValve and RemoteIpFilter so that calls to `ServletRequest.getRemoteHost()` are consistent with the return value of `ServletRequest.getRemoteAddr()` rather than always returning a value for the proxy. (markt)
- 56890: Align the behaviour of `ServletContext.getRealPath(String path)` with the recent clarification from the Servlet specification project. If the path parameter does not start with `/` then Tomcat processes the call as if `/` is appended to the beginning of the provided path. (markt)
- 64080: Enhance the graceful shutdown feature. Includes a new option for `StandardService`, `gracefulStopAwaitMillis`, that allows a time to be specified to wait for client connections to complete and close before the Container hierarchy is stopped. (markt)
- 64921: Ensure that the `LoadBalancerDrainingValve` uses the correct setting for the secure attribute for any session cookies it creates. Based on a pull request by Andreas Kurth. (markt)
- 64947: Don't assume that the `Upgrade` header has been set on the `HttpServletResponse` before any call is made to `HttpServletRequest.upgrade()`. (markt)
- Ensure that values are not duplicated when manipulating the vary header. Based on a pull request by Fredrik Fall. (markt)

#### Coyote

- 64944: Ensure that the bytesSent metric is correctly updated when compression is enabled. (markt)

#### WebSocket

- 64951: Fix a potential file descriptor leak when WebSocket connections are attempted and fail. Patch provided by Maurizio Adami. (markt)

#### Web applications

- Correct a regression in the addition of the HTTP header security filter to the examples web application that prevented the Servlet examples that depend on the asynchronous API from functioning correctly. (kkolinko/markt)

#### Tribes

- Start all core threads when starting the receiver and dispatch interceptor. (kfujino)

#### Other

- Update the OWB module to Apache OpenWebBeans 2.0.20. (remm)
- Update the CXF module to Apache CXF 3.4.1. (remm)
- 64931: Implement validation of `changelog.xml` file at build time. (kkolinko)
- Update to Maven Ant Resolver Tasks 1.3.0. (markt)
- 62695: Provide SHA-256 and SHA-512 checksums for files published via Maven. (markt)

### 2020-11-17 Tomcat 9.0.40 (markt)

#### Catalina

- 55559: Add a new attribute, `localJndiResource`, that allows a UserDatabaseRealm to obtain a UserDatabase instance from the local (web application) JNDI context rather than the global JNDI context. This option is only useful when the Realm is defined on the Context. (markt)
- 64805: Correct imports used by `JMXProxyServlet`. (markt)
- Fix JNDIRealm pooling problems retrying on another bad connection. Any retries are made on a new connection, just like with the single connection scenario. Also remove all connections from the pool after an error. (remm)
- Remove the entry for `org.apache.tomcat.util.descriptor.tld.LocalStrings` from tomcat-embed-core's GraalVM tomcat-resource.json. It no more part of the jar since Fix unwanted JPMS dependency of embed-core on embed-jasper. (mgrigorov)
- Add org.apache.coyote.http11.Http11Nio2Protocol to the list of classes which could be instantiated via reflection in GraalVM. (mgrigorov)
- Add `JsonErrorReportValve` that extends the `ErrorReportValve` that returns response as JSON instead of HTML. (kfujino)
- Add GraalVM config for Tomcat JNI related classes. This makes it possible to use the APR protocol in GraalVM native images. To use it add the following to the native-image arguments: `-H:JNIConfigurationResources=META-INF/native-image/org.apache.tomcat.embed/tomcat-embed-core/tomcat-jni.json` (mgrigorov)
- JNDIRealm connections should only be created with the container classloader as the thread context classloader, just like for the JAAS realm. (remm)
- 64871: Log a warning if Tomcat blocks access to a file because it uses symlinks. (markt)
- Rename `JDBCStore` to `DataSourceStore` and remove bottlenecks for database backed session store. The `JDBCStore` is deprecated but remains unchanged. Patch submitted by Philippe Mouawad. (remm)

#### Coyote

- Refactor the HTTP/2 window update handling for padding in data frames to ensure that the connection window is correctly updated after a data frame with zero length padding is received. (markt)
- Fix processing of URIs with %nn encoded solidus characters when `encodedSolidusHandling` was set to `passthrough` and the encoded solidus was preceded by other %nn encoded characters. Based on a pull request by willmeck. (markt)
- 63362: Add collection of statistics for HTTP/2, WebSocket and connections upgraded via the HTTP upgrade mechanism. (markt)
- Restore exception catch around Poller.events, as it would cause the NIO poller thread to exit. This is a regression caused when the Poller.events method was refactored. (remm)
- Provide messages for some `SocketTimeoutException` instances that did not have one. (markt)
- Avoid most of the thread pool use during NIO2 socket accept. Patch submitted by Anil Gursel. (remm)
- Add additional debug logging for I/O issues when communicating with the user agent. (markt)
- 64830: Fix concurrency issue in HPACK decoder. (markt)
- Fix a concurrency issue in the NIO connector that could cause newly created connections to be removed from the poller. (markt)

#### Jasper

- 64784: Don't include the time the Java file was generated as a comment when generating Java files for JSPs and/or tags if the Java file was created during pre-compilation. This is to aid repeatable builds. (markt)
- 64794: Security exception reading system property on JspRuntimeLibrary use. (remm)
- Add support for specifying Java 16 (with the value `16`) as the compiler source and/or compiler target for JSP compilation. If used with an ECJ version that does not support these values, a warning will be logged and the latest supported version will used. (markt)
- Update to the Eclipse JDT compiler 4.17. (markt)
- 64849: Correct JPMS metadata for the Jakarta Expression Language JARs to provide missing ServiceLoader information. (markt)

#### WebSocket

- 64848: Fix a variation of this memory leak when a write I/O error occurs on a non-container thread. (markt)

#### Web applications

- 64799: Added missing resources to host-manager web app. (isapir)
- 64797: Align manager.xml template file in Host-Manager with context.xml of real Manager web application. (isapir)
- Configure the examples web applications to set `SameSite=strict` for all cookies, including session cookies, created by the application. (markt)
- Configure the examples, Manager and Host Manager to use the HTTP header security filter with default settings apart from no HSTS header. Based on a suggestion by Debangshu Kundu. (markt)

#### Other

- Improvements to French translations. (remm)
- Improvements to Korean translations. (woonsan)
- Improvements to Russian translations. Provided by Azat. (markt)
- Align JPMS module names with current Jakarta EE expectations. (markt)
- 64870: Update to bnd 5.3.0-SNAPSHOT to work around a JRE bug. (markt)

### 2020-10-09 Tomcat 9.0.39 (markt)

#### Catalina

- The health check valve will now check the state of its associated containers to report availability. (remm)
- Fix race condition when saving and recycling session in `PersistentValve`. (kfujino)
- Deprecate the JDBCRealm. (markt)
- Correct numerous spellings throughout the code base. Based on a pull request from John Bampton. (markt)
- 64715: Add PasswordValidationCallback to the JASPIC implementation. Patch provided by Robert Rodewald. (markt)
- Allow using the utility executor for annotation scanning. Patch provided by Jatin Kamnani. (remm)
- 64751: Correct the JPMS module descriptor so the embedded JARs may be used with JPMS. (markt)
- When performing an incremental build, ensure bnd does not create unwanted JPMS dependencies between embedded JARs. (markt)
- Add a bloom filter to speed up archive lookup and improve deployment speed of applications with a large number of JARs. Patch provided by Jatin Kamnani. (remm)
- Throw `SQLException` instead of `NullpointerException` when failing to connect to the database. (kfujino)
- 64735: Ensure that none of the methods on a `ServletContext` instance always fail when running under a SecurityManager. Pull request provided by Kyle Stiemann. (markt)
- 64765: Ensure that the number of currently processing threads is tracked correctly when a web application is undeployed, long running requests are being processed and `renewThreadsWhenStoppingContext` is enabled for the web application. (markt)
- Improve the error messages when running under JPMS without the necessary options to enable reflection required by the memory leak prevention / detection code. (markt)
- Add connection pooling to JNDI realm. (remm)
- When estimating the size of a resource in the static resource cache, include a specific allowance for the path to the resource. Based on a pull request by blueSky1825821. (markt)

#### Coyote

- Do not send an HTTP/2 PING frame to measure round-trip time when it is known that the HTTP/2 connection is not in a good state. (markt)
- Ensure HTTP/2 timeouts are processed for idle connections. (markt)
- 64743: Correct a regression introduced in 9.0.37 that caused a `Connection: close` header to be added to the response if the Connector was configured with `maxSwallowSize=-1`. (markt)
- When logging HTTP/2 debug messages, use consistent formatting for stream identifiers. (markt)
- Correct some double counting in the code that tracks the number of in-flight asynchronous requests. The tracking enables Tomcat to shutdown gracefully when asynchronous processing is in use. (markt)
- Improve the error handling for the HTTP/2 connection preface when the Connector is configured with `useAsyncIO="true"`. (markt)
- Refactor the handling of closed HTTP/2 streams to reduce the heap usage associated with used streams and to retain information for more streams in the priority tree. (markt)
- Don't send the Keep-Alive response header if the connection has been explicitly closed. (markt)
- 64710: Avoid a `BufferOverflowException` if an HTTP/2 connection is closed while the parser still has a partial HTTP/2 frame in the input buffer. (markt)

#### Jasper

- Use lazy instantiation to improve the performance when working with listeners added to the `ELContext`. Pull request provided by Thomas Andraschko. (markt)

#### Web applications

- Configure the Manager and Host Manager applications to set `SameSite=strict` for all cookies, including session cookies, created by the application. (markt)
- Update the Manager How-To in the documentation web application to clarify when a user may wish to deploy additional instances of the Manager web application. (markt)

#### Other

- Update to Commons Daemon 1.2.3. This adds support to jsvc for `--enable-preview` and native memory tracking (Procrun already supported these features), adds some addition debug logging and adds a new feature to Procrun that outputs the command to (re-)configure the service with the current settings. (markt)
- When building, only rebuild JAR files (including OSGi and JPMS metadata) if the contents has changed. (markt)
- Improvements to Chinese translations. Pull request provided by Yang Yang. (markt)
- Expand coverage of Russian translations. Pull request provided by Nikolay Gribanov. (markt)
- Update the OWB module to Apache OpenWebBeans 2.0.18. (remm)
- Update the CXF module to Apache CXF 3.4.0. (remm)
- Fix running service.bat when called from `$CATALINA_HOME`. (markt)
- Complete the fix for 63815. Users wishing to use system properties that require quoting with `catalina.sh` and the `debug` option must use a JRE that includes the fix for JDK-8234808. (markt)
- Improvements to Chinese translations. Provided by leeyazhou. (markt)
- Improvements to Czech translations. Provided by Dušan Hlaváč and Arnošt Havelka. (markt)
- Improvements to French translations. (remm)
- Improvements to Korean translations. (woonsan)
- Improvements to Spanish translations. Provided by Andrewlanecarr. (markt)

### 2020-09-15 Tomcat 9.0.38 (markt)

#### Catalina

- 64582: Pre-load the `CoyoteOutputStream` class to prevent a potential exception when running under a security manager. Patch provided by Johnathan Gilday. (markt)
- 64593: If a request is not matched to a Context, delay issuing the 404 response to give the rewrite valve, if configured, an opportunity to rewrite the request. (remm/markt)
- Change top package name for generated embedded classes to avoid conflict with default host name on case insensitive filesystems. (remm)
- Add missing code generation for remaining digester rules. (remm)
- Add a dedicated loader for generated code to avoid dynamic class loading. (remm)
- Refactor the Default servlet to provide a single method that can be overridden (`generateETag()`) should a custom entity tag format be required. (markt)
- Improve the validation of entity tags provided with conditional requests. Requests with headers that contain invalid entity tags will be rejected with a 400 response code. Improve the matching algorithm used to compare entity tags in conditional requests with the entity tag for the requested resource. Based on a pull request by Sergey Ponomarev. (markt)
- Correct the description of the storage format for salted hashes in the Javadoc for `MessageDigestCredentialHandler` and refactor the associated code for clarity. Based on a patch provided by Milo van der Zee. (markt)
- Correct the path validation to allow the use of the file system root for the `docBase` attribute of a `Context`. Note that such a configuration should be used with caution. (markt)
- Added filtering expression for requests that are not supposed to use session in `PersistentValve`. (kfujino)
- Use the correct method to calculate session idle time in `PersistentValve`. (kfujino)
- Fix path used by the health check valve when it is not associated with a `Context`. (remm)
- 64712: The JASPIC authenticator now checks the `ServerAuthModule` for `jakarta.servlet.http.authType` and, if present, uses the value provided. Based on a patch by Robert Rodewald. (markt)
- 64713: The JASPIC authenticator now checks the value of `jakarta.servlet.http.registerSession` set by the `ServerAuthModule` when deciding whether or nor to register the session. Based on a patch by Robert Rodewald. (markt)

#### Coyote

- 57661: For requests containing the `Expect: 100-continue` header, add optional support to delay sending an intermediate 100 status response until the servlet reads the request body, allowing the servlet the opportunity to respond without asking for the request body. Based on a pull request by malaysf. (markt)
- Refactor the implementation of `ServletInputStream.available()` to provide a more accurate return value, particularly when end of stream has been reached. (markt)
- Refactor the stopping of the acceptor to ensure that the acceptor thread stops when a connector is started immediately after it is stopped. (markt)
- 64614: Improve compatibility with FIPS keystores. When a FIPS keystore is configured and the keystore contains multiple keys, the alias attribute will be ignored and the key used will be implementation dependent. (jfclere)
- 64621: Improve handling HTTP/2 stream reset frames received from clients. (markt)
- 64660: Avoid a potential NPE in the AprEndpoint if a socket is closed in one thread at the same time as the poller is processing an event for that socket in another. (markt)
- 64671: Avoid several potential NPEs introduced in the changes in the previous release to reduce the memory footprint of closed HTTP/2 streams. (markt)
- Refactor the HTTP/2 implementation to more consistently return a stream closed error if errors occur after a stream has been reset by the client. (markt)
- Improve handling of HTTP/2 stream level flow control errors and notify the stream immediately if it is waiting for an allocation when the flow control error occurs. (markt)
- Ensure that window update frames are sent for HTTP/2 connections to account for DATA frames containing padding including when the associated stream has been closed. (markt)
- Ensure that window update frames are sent for HTTP/2 connections and streams to account for DATA frames containing zero-length padding. (markt)
- 64710: Revert the changes to reduce the memory footprint of closed HTTP/2 streams as they triggered multiple regressions in the form of `NullPointerException`s. (markt)
- Ensure that the HTTP/2 overhead protection check is performed after each HTTP/2 frame is processed. (markt)

#### WebSocket

- Requests received via proxies may be marked as using the `ws` or `wss` protocol rather than `http` or `https`. Ensure that such requests are not rejected. PR provided by Ronny Perinke. (markt)
- 64848: Fix a potential issue where the write lock for a WebSocket connection may not be released if an exception occurs during the write. (markt)
- 64644: Add support for a read idle timeout and a write idle timeout to the WebSocket session via custom properties in the user properties instance associated with the session. Based on a pull request by sakshamverma. (markt)

#### Web applications

- Remove the localization of the text output of the Manager application list of contexts and the Host Manager application list of hosts so that the output is more consistent. PR provided by Holomark. (markt)
- Clean-up / standardize the XSL files used to generate the documentation. PR provided by John Bampton. (markt)
- 62723: Clarify the effects of some options for cluster `channelSendOptions`. Patch provided by Mitch Claborn. (schultz)
- Remove the out of date functional specification section from the documentation web application. (markt)
- Extracted CSS styles from the Manager we application for better code maintenance and replaced the GIF logo with SVG. (isapir)
- Add document for `PersistentValve`. (kfujino)

#### Other

- Correct a regression in the fix for 64540 and include `org.apache.tomcat.util.modeler.modules` and `org.apache.tomcat.util.net.jsse` in the list of exported packages. (markt)
- Remove the local copy of `javax.transaction.xa` package which is only used during compilation. The package is provided by the JRE from Java 1.4 onwards so the local copy should be unnecessary. (markt)
- Improve the quality of the Japanese translations provided with Apache Tomcat. Includes contributions from Yuki Shira. (markt)
- 64645: Use a non-zero exit code if the `service.bat` does not complete normally. (markt)
- Update the internal fork of Apache Commons BCEL to 6.5.0. Code clean-up only. (markt)
- Update the internal fork of Apache Commons Codec to 53c93d0 (2020-08-18, 1.15-SNAPSHOT). Code clean-up. (markt)
- Update the internal fork of Apache Commons FileUpload to c25a4e3 (2020-08-26, 2.0-SNAPSHOT). Code clean-up and RFC 2231 support. (markt)
- Update the internal fork of Apache Commons Pool to 2.8.1. Code clean-up and improved abandoned pool handling. (markt)
- Update the internal fork of Apache Commons DBCP to 6d232e5 (2020-08-11, 2.8.0-SNAPSHOT). Code clean-up various bug fixes. (markt)
- Update the packaged version of the Tomcat Native Library to 1.2.25. (markt)

### 2020-07-05 Tomcat 9.0.37 (markt)

#### Catalina

- Remove the error message on start if `java.io.tmpdir` is missing and add an explicit error message on application deployment when the sole feature that depends on it (anti-resource locking) is configured and can't be used. (markt)
- Implement a significant portion of the TLS environment variables for the rewrite valve. (remm)
- 64506: Correct a potential race condition in the resource cache implementation that could lead to `NullPointerException`s during class loading. (markt)
- Add `application/wasm` to the media types recognised by Tomcat. Based on a PR by Thiago Henrique Hüpner. (markt)
- Fix a bug in `HttpServlet` so that a `405` response is returned for an HTTP/2 request if the mapped servlet does implement the requested method rather than the more general `400` response. (markt)
- Add generated classes using Tomcat embedded as an optional replacement for the Catalina configuration files. (remm)
- 64541: Refactor the DTD used to validate `mbeans-descriptors.xml` files to avoid issues when XML entity expansion is limited or disabled. (markt)

#### Coyote

- Include a `Connection: close` HTTP header when committing a response and it is known that the `maxSwallowSize` limit is going to be exceeded. (markt)
- 64509: Correctly parse RFC 2109 version 1 cookies that use a comma as a separator between cookies when using the RFC 6265 cookie processor. Based on a patch by W J Carpenter. (markt)
- Fix the utility code that converted IPv6 addresses to a canonical form to correctly handle input addresses that ended with a pair of colons. Based on a patch by syarramsetty-skyhook. (markt)
- Correctly parse RFC 2109 version 1 cookies that have additional linear white space around cookie attribute names and values when using the RFC 6265 cookie processor. (markt)
- Once an HTTP/2 stream has been closed, ensure that the code that cleans up references that are no longer required is called. (markt)
- Reduce the memory footprint of closed HTTP/2 streams. (markt)
- Ensure that the HTTP/1.1 processor is correctly recycled when a direct connection to h2c is made. (markt)

#### Cluster

- 64560: Refactor the replication of a changed session ID for a replicated session so that the list of changes associated with the session is not reset when the session ID changes. (markt)

#### WebSocket

- 64563: Add additional validation of payload length for WebSocket messages. (markt)
- Correct the calculation of payload length when four or more bytes are required to represent the payload length. (markt)

#### Other

- 64498: Fix incorrect version format in OSGi manifests. Patch provided by Raymond Augé. (markt)
- 64501: Refactor the handling of the deprecated `LOGGING_CONFIG` environment variable to avoid using a POSIX shell feature that is not available by default on Solaris 10. (markt)
- 64513: Remove bndlib from dependencies as it is not required. Pull request provided by Raymond Augé. (markt)
- 64515: Bnd files don't need to be filtered (save some work). Pull request provided by Raymond Augé. (markt)
- Update the OWB module to Apache OpenWebBeans 2.0.17. (remm)
- 64514: Fixes some missing class dependency issues in bootstrap to address packaging/dependency concerns for JPMS and OSGi. Pull request provided by Raymond Augé. (markt)
- 64521: Avoid moving i18n translations into classes dir since they are packaged into separate jars. Pull request provided by Raymond Augé. (markt)
- 64522: Package jars in effective dependency order. Pull request provided by Raymond Augé. (markt)
- Store common build details in a shared build-defaults.bnd. Pull request provided by Raymond Augé. (markt)
- 64532: Update to bnd 5.1.1. Pull request provided by Raymond Augé. (markt)
- 64540: Switch from bndwrap task to bnd task, begin generating a better manifest and make sure the resulting jar contents are correct. Pull request provided by Raymond Augé. (markt)
- 64544: Add built libs to the bnd classpath for introspection. Pull request provided by Raymond Augé. (markt)
- Improve the quality and expand the coverage of the French translations provided with Apache Tomcat. (remm)
- 64548: Generate JPMS metadata. (rotty3000)

### 2020-06-07 Tomcat 9.0.36 (markt)

#### Catalina

- 64432: Correct a refactoring regression that broke handling of multi-line configuration in the RewriteValve. Patch provided by Jj. (markt)
- Fix use of multiple parameters when defining RewriteMaps. (remm/fschumacher)
- Add the special internal rewrite maps for case modification and escaping. (remm/fschumacher)
- Correct a regression in an earlier fix that broke the loading of configuration files such as keystores via URIs on Windows. (markt)
- 64470: The default value of the solidus handling should reflect the associated system property. (remm)
- Implement a few rewrite SSL env that correspond to Servlet request attributes. (remm)
- 64442: Be more flexible with respect to the ordering of groups, roles and users in the `tomcat-users.xml` file. (fschumacher)
- 64493: Revert possible change of returned protocol attribute value on the `Connector`. (remm)

#### Coyote

- Add support for ALPN on recent OpenJDK 8 releases. (remm)
- 64467: Improve performance of closing idle HTTP/2 streams. (markt)
- Expose server certificate through the `SSLSupport` interface. (remm)
- 64483: Log a warning if an AJP request is rejected because it contains an unexpected request attribute. (markt)
- 64485: Fix possible resource leak getting last modified from `ConfigurationSource.Resource`. (remm)

#### Jasper

- 64488: Ensure that the ImportHandler from the Expression Language API is able to load classes from the Java runtime when running under a SecurityManager. Based on a patch by Volodymyr Siedleck. (markt)

#### WebSocket

- Consistently throw a `DeploymentException` when an invalid endpoint path is specified and catch invalid endpoint paths earlier. (markt)
- Include the target URL in the log message when a WebSocket connection fails. (markt)

#### Other

- Update the list of known `Charset`s in the `CharsetCache` to include `ISO-8859-16`, added in OpenJDK 15. (markt)
- Improve the quality and expand the coverage of the French translations provided with Apache Tomcat. (remm)
- 64430: Add support for the `CATALINA_OUT_CMD` environment variable that defines a command to which captured stdout and stderr will be redirected. Patch provided by Harald Dunkel. (markt)
- Switch from the unsupported Maven Ant Tasks to the supported Maven Resolver Ant Tasks to upload artifacts to the ASF Maven repository (and from there to Maven Central). (markt)
- Update dependency on bnd to 5.1.0. (markt)

### 2020-05-11 Tomcat 9.0.35 (markt)

#### Catalina

- Reduce reflection use and remove AJP specific code in the Connector. (remm/markt/fhanik)
- Rework the fix for 64021 to better support web applications that use a custom class loader that loads resources from non-standard locations. (markt)
- Remove redundant sole path/URI from error page message on SC_NOT_FOUND. (michaelo)
- Log a warning if a `CredentialHandler` instance is added to an instance of the `CombinedRealm` (or a sub-class) as the `CombinedRealm` doesn't use a configured `CredentialHandler` and it is likely that a configuration error has occurred. (markt)
- Add more descriptive error message in DefaultServlet for SC_NOT_FOUND. (michaelo)
- 59203: Before calling `Thread.stop()` (if configured to do so) on a web application created thread that is not stopped by the web application when the web application is stopped, try interrupting the thread first. Based on a pull request by Govinda Sakhare. (markt)
- 64309: Improve the regular expression used to search for class loader repositories when bootstrapping Tomcat. Pull request provided by Paul Muriel Biya-Bi. (markt)
- 64384: Fix multipart configuration ignoring some parameters in some cases. (schultz)
- 64386: WebdavServlet does not send "getlastmodified" property for resource collections. (michaelo)
- Remove reason phrase on WebDAV Multi-Status (207) response. (michaelo)
- 64398: Change default value separator for property replacement to `:-` due to possible conflicts. The syntax is now `${name:-default}`. (remm)
- Improve validation of storage location when using FileStore. (markt)

#### Coyote

- Move `SocketProperties` mbean to its own type rather than use a subType to improve robustness with tools. (remm)
- Include the problematic data in the error message when reporting that the provided request line contains an invalid component. (markt)
- Improve the handling of requests that use an expectation. Do not disable keep-alive where the response has a non-2xx status code but the request body has been fully read. (rjung/markt)
- 64403: Ensure that compressed HTTP/2 responses are not sent with a content length header appropriate for the original, uncompressed response. (markt)

#### Jasper

- Remove redundant sole path/URI from error page message on SC_NOT_FOUND. (michaelo)
- Add more descriptive error message in DefaultServlet for SC_NOT_FOUND. (michaelo)
- 64373: When a tag file is packaged in a WAR and then that WAR is unpacked in `/WEB-INF/classes` ensure that the tag file can still be found. Patch provided by Karl von Randow. (markt)
- Ensure that the Jasper code that interfaces with the Eclipse Compiler for Java (ECJ) enables Jasper to compile JSPs using ECJ 4.14 onwards when the JSPs have inner classes. (markt)

#### Web applications

- Fix the saving of a Context configuration file via the scripting interface of the Manager web application. (markt)
- Add a section to the TLS Connector documentation on different key store types and how to configure them. (markt)

#### Other

- Update JUnit to version 4.13. (markt)
- Add missing entries to test class path in sample NetBeans configuration files. Patch provided by Brian Burch. (markt)
- Refactor to use parameterized `Collection` constructors where possible. Pull request provided by Lars Grefer. (markt)
- Refactor to use empty arrays with `Collections.toArray()`. Pull request provided by Lars Grefer. (markt)
- Refactor loops with a condition to exit as soon as the condition is met. Pull request provided by Lars Grefer. (markt)
- Refactor bulk addition to collections to use `addAll()` rather than a loop. Pull request provided by Lars Grefer. (markt)
- Improve the quality and expand the coverage of the French translations provided with Apache Tomcat. (remm)
- Expand the coverage of the Chinese translations provided with Apache Tomcat. Contributions provided by winsonzhao, ZhangJieWen and Lee Yazhou. (markt)
- Update the packaged version of the Tomcat Native Library to 1.2.24. (markt)
- Refactor to use enhanced for loops where possible. Pull request by Lars Grefer. (markt)
- Improve IDE support for IntelliJ IDEA. Patch provided by Lars Grefer. (markt)
- Improve the quality of the Japanese translations provided with Apache Tomcat. Includes contributions from Yoshy. (markt)
- Improve the coverage and quality of the Korean translations provided with Apache Tomcat. (woonsan)
- Update dependency on bnd to 5.0.1. (markt)

### 2020-04-08 Tomcat 9.0.34 (markt)

#### Catalina

- Ensure all URL patterns provided via web.xml are %nn decoded consistently using the encoding of the web.xml file where specified and UTF-8 where no explicit encoding is specified. (markt)
- Allow a comma separated list of class names for the `org.apache.tomcat.util.digester.PROPERTY_SOURCE` system property. (remm)
- 64149: Avoid NPE when using the access log valve without a pattern. (remm)
- 64226: Reset timezone after parsing a date since the date format is reused. Test case submitted by Gary Thomas. (remm)
- 64247: Using a wildcard for `jarsToSkip` should not override a possibly present `jarsToScan`. Based on code submitted by Iridias. (remm)
- 64265: Fix ETag comparison performed by the default servlet. The default servlet always uses weak comparison. (markt)
- Add support for default values when using `${...}` property replacement in configuration files. Based on a pull request provided by Bernd Bohmann. (markt)

#### Coyote

- When configuring an HTTP Connector, warn if the encoding specified for `URIEncoding` is not a superset of US-ASCII as required by RFC7230. (markt)
- Avoid always retrieving the NIO poller selection key when processing to reduce sync. (remm)
- 64240: Ensure that HTTP/0.9 requests that contain additional data on the request line after the URI are treated consistently. Such requests will now always be treated as HTTP/1.1. (markt)
- Expose the HTTP/2 connection ID and stream ID to applications via the request attributes `org.apache.coyote.connectionID` and `org.apache.coyote.streamID` respectively. (markt)
- Replace the system property `org.apache.tomcat.util.buf.UDecoder.ALLOW_ENCODED_SLASH` with the Connector attribute `encodedSolidusHandling` that adds an additional option to pass the `%2f` sequence through to the application without decoding it in addition to rejecting such sequences and decoding such sequences. (markt)
- Expose the associated `HttpServletRequest` to the `CookieProcessor` when generating a cookie header so the header can be tailored based on the properties of the request, such as the user agent, if required. Based on a patch by Lazar Kirchev. (markt)

#### Jasper

- Update to the Eclipse JDT compiler 4.15. (markt)
- Add support for specifying Java 14 (with the value `14`) and Java 15 (with the value `15`) as the compiler source and/or compiler target for JSP compilation. If used with an ECJ version that does not support these values, a warning will be logged and the latest supported version will used. (markt)

#### Cluster

- Refactor the creation of `DeltaRequest` objects to make it simpler to use custom implementations. Based on a pull request provided by Thomas Stock. (markt)

#### Web applications

- Correct the documentation web application to remove references to the `org.apache.catalina.STRICT_SERVLET_COMPLIANCE` system property changing the default for the `URIEncoding` attribute of the Connector. (markt)
- Correct the documentation web application to remove references to the `org.apache.tomcat.util.buf.UDecoder.ALLOW_ENCODED_SLASH` system property changing how the sequence `%5c` is interpreted in a URI. (markt)

#### Other

- Improve the quality and expand the coverage of the French translations provided with Apache Tomcat. Contribution provided by Tom Bens. (remm)
- Expand the coverage of the Chinese translations provided with Apache Tomcat. Contribution provided by Lee Yazhou. (markt)
- 64270: Set the documented default umask of `0027` when using jsvc via `daemon.sh` and allow the umask used to be configured via the `UMASK` environment variable as it is when using `catalina.sh`. (markt)
- Update the OWB module to Apache OpenWebBeans 2.0.16. (remm)
- Update the CXF module to Apache CXF 3.3.6. (remm)
- Deprecated the `LOGGING_CONFIG` environment variable and replace it with the `CATALINA_LOGGING_CONFIG` environment variable to avoid clashes with other components that use `LOGGING_CONFIG`. (markt)

### 2020-03-16 Tomcat 9.0.33 (markt)

#### Coyote

- 64210: Correct a regression in the improvements to HTTP header validation that caused requests to be incorrectly treated as invalid if a `CRLF` sequence was split between TCP packets. Improve validation of request lines, including for HTTP/0.9 requests. (markt)

#### Other

- 64206: Correct regression introduced in 9.0.31 that meant that the HTTP port specified when using the Windows Installer was ignored and 8080 was always used. (markt)

### not released Tomcat 9.0.32 (markt)

#### Catalina

- Store config compatibility with HostWebXmlCacheCleaner listener. (remm)
- Modify the `RewriteValve` to use `ServletRequest.getServerName()` to populate the `HTTP_HOST` variable rather than extracting it from the `Host` header as this allows HTTP/2 to be supported. (markt)
- Switch Tomcat embedded to loading MIME type mappings from a property file generated from the default `web.xml` so the MIME type mappings are consistent regardless of how Tomcat is started. (markt)
- Missing store config attributes for Resources elements. (remm)
- 64153: Ensure that the parent for the web application class loader is set consistently. (markt)
- 64166: Ensure that the names returned by `HttpServletResponse.getHeaderNames()` are unique. (markt)
- Rename `org.apache.tomcat.util.digester.Digester$EnvironmentPropertySource` to `org.apache.tomcat.util.digester.EnvironmentPropertySource`. The old class is still available but deprecated. Patch provided by Bernd Bohmann. (markt)
- Add new attribute `persistAuthentication` to both `StandardManager` and `PersistentManager` to support authentication persistence. Patch provided by Carsten Klein. (markt)
- 64184: Avoid repeated log messages if a `MemoryUserDatabase` is configured but the specified configuration file is missing. (markt)
- 64189: Expose the web application version String as a `ServletContext` attribute named `org.apache.catalina.webappVersion`. (markt)

#### Coyote

- When the NIO or APR/native connectors were configured with `useAsyncIO="true"` and a zero length read or write was performed, the read/write would time out rather than return immediately. (markt)
- 64141: If using a CA certificate, remove a default value for the truststore file when not using a JSSE configuration. (remm)
- Improve robustness of OpenSSLEngine shutdown. Based on code submitted by Manuel Dominguez Sarmiento. (remm)
- Add the TLS request attributes used by IIS to the attributes that an AJP Connector will always accept. (markt)
- A zero length AJP secret will now behave as if it has not been specified. (remm)
- 64188: If an error occurs while committing or flushing the response when using a multiplexing protocol like HTTP/2 that requires the channel to be closed but not the connection, just close the channel and allow the other channels using the connection to continue. Based on a suggestion from Alejandro Anadon. (markt)
- Correct the semantics of `getEnableSessionCreation` and `setEnableSessionCreation` for `OpenSSLEngine`. Pull request provided by Alexander Scheel. (markt)
- 64192: Correctly handle case where unread data is returned to the read buffer when the read buffer is non empty. Ensure a gathering TLS read stops once the provided ByteBuffers are full or no more data is available. (markt)
- 64195: Revert simplification of NIO block read and write, deferred to Tomcat 10. (remm)
- Allow async requests to complete cleanly when the Connector is paused before `complete()` is called on a container thread. (markt)

#### Jasper

- Parameterize JSP version and API class names in localization messages to allow simpler re-use between major versions. (markt)
- Ensure that TLD files listed in the `jsp-config` section of `web.xml` that are registered in the `uriTldResourcePathMap` with the URI specified in `web.xml` are also registered with the URI in the TLD file if it is different. Patch provided by Markus Lottmann. (markt)

#### Cluster

- Fix cloud environment lookup order and add a dedicated `DNS_MEMBERSHIP_SERVICE_NAME` environment for use with the DNS membership provider. Submitted by Bernd Bohmann. (remm)
- Allow configuring the `DNSMembershipProvider` using the `dns` alias. Submitted by Bernd Bohmann. (remm)

#### Web applications

- Add to the documentation for the `JmxRemoteLifecycleListener` the requirement to use `-Dcom.sun.management.jmxremote.registry.ssl=false` if TLS is not being used else clients will be unable to connect to the JMX server. (markt)
- Expand the documentation for the `address` attribute of the AJP Connector and document that the AJP Connector also supports the `ipv6v6only` attribute with the APR/Native implementation. (markt)

#### Other

- Expand the coverage of the French translations provided with Apache Tomcat. (remm)
- Expand the coverage of the Chinese translations provided with Apache Tomcat. Contribution provided by BoltzmannWxd. (markt)
- Update the OWB module to Apache OpenWebBeans 2.0.15. (remm)
- Update the CXF module to Apache CXF 3.3.5. (remm)
- Expand the coverage of the Korean translations provided with Apache Tomcat. Contributions provided by B. Cansmile Cha. (markt)
- Expand the coverage of the French translations provided with Apache Tomcat. (remm)
- 64190: Add support for specifying milliseconds (using `S`, `SS` or `SSS`) in the timestamp used by JULI's `OneLineFormatter`. (markt)

### 2020-02-11 Tomcat 9.0.31 (markt)

#### Catalina

- Do not store username and password as session notes during authentication if they are not needed. (kkolinko)
- Avoid useless environment restore when not using GSSCredential in JNDIRealm. (remm)
- 58577: Respect the argument-count when searching for MBean operations to invoke via the JMXProxyServlet. (schultz)
- 63691: Skip all jar and directory scanning when the wildcard pattern "*" or "*.jar" is set or added to `tomcat.util.scan.StandardJarScanFilter.jarsToSkip`. (isapir)
- 64005: Correct a regression in the static resource caching changes introduced in 9.0.28. Avoid a `NullPointerException` when working with the URL provided for the root of a packed WAR. (markt)
- 64006: Provide default configuration source based on the current directory if none has been set, for full compatibility with existing code. (remm)
- 64008: Clarify/expand the Javadoc for the `Tomcat#addWebapp()` and related methods. (markt)
- Deprecate the `JmxRemoteLifecycleListener` as the features it provides are now available in the remote JMX capability included with the JRE. This listener will be removed in Tomcat 10 and may be removed from Tomcat 9.0.x some time after 2020-12-31. (markt)
- 64011: `JNDIRealm` no longer authenticates to LDAP. (michaelo)
- 64021: Ensure that container provided SCIs are always loaded before application provided SCIs. Note that where both the container and the application provide the same SCI, it is the application provided SCI that will be used. (markt)
- SCI definitions from JARs unpacked into `WEB-INF/classes` are now handled consistently and will always be found irrespective of whether the web application defines a JAR ordering or not. (markt)
- 64023: Skip null-valued session attributes when deserializing sessions. (schultz)
- Do not throw a NullPointerException when an MBean or operation cannot be found by the JMXProxyServlet. (schultz)
- 64067: Allow more than one parameter when defining RewriteMaps. (fschumacher)
- 64074: `InputStream`s for directories obtained from resource URLs now return a directory listing consistent with the behaviour of `FileURLConnection`. In addition to restoring the behaviour that was lost as a result of the introduction of `CachedResourceURLConnection`, it expands the feature to include packedWARs and to take account of resource JARs. (markt)
- Refactor recycle facade system property into a new connector attribute named `discardFacades`. (remm)
- 64089: Add `${...}` property replacement support to XML external entity definitions. (markt)
- Deprecate `MappingData.contextPath` as it is unused. (markt)
- Fix a problem that meant that remote host, address and port information could be missing in the access log for an HTTP/2 request where the connection was closed unexpectedly. (markt)

#### Coyote

- Simplify NIO blocking read and write. (remm)
- Ensure that Servlet Asynchronous processing timeouts fire when requests are made using HTTP/2. (markt)
- Fix the corruption of the TLS configuration when using the deprecated TLS attributes on the Connector if the configuration has already been set via the new `SSLHostConfig` and `SSLHostConfigCertificate` elements. (markt)
- 63966: Switch the message shown when using HTTP to connect to an HTTPS port from ISO-8859-1 to UTF-8. (markt)
- 64007: Cancel selection key in poller before wrapper close to avoid possible deadlock. (remm)
- Add support for RFC 5915 formatted, unencrypted EC key files when using a JSSE based TLS connector. (markt)
- Correct a regression introduced in 9.0.28 that meant invalid tokens in the `Transfer-Encoding` header were ignored rather than treated as an error. (markt)
- Rename the HTTP Connector attribute `rejectIllegalHeaderName` to `rejectIllegalHeader` and expand the underlying implementation to include header values as well as names. (markt)
- Disable (comment out in server.xml) the AJP/1.3 connector by default. (markt)
- Change the default bind address for the AJP/1.3 connector to be the loopback address. (markt)
- Rename the `requiredSecret` attribute of the AJP/1.3 Connector to `secret` and add a new attribute `secretRequired` that defaults to `true`. When `secretRequired` is `true` the AJP/1.3 Connector will not start unless the `secret` attribute is configured to a non-null, non-zero length String. (markt)
- Add a new attribute, `allowedRequestAttributesPattern` to the AJP/1.3 Connector. Requests with unrecognised attributes will be blocked with a 403. (markt)

#### Jasper

- Update the performance optimisation for using expressions in tags that depend on uninitialised tag attributes with implied scope to make the performance optimisation aware of the new public class (`java.lang.Record`) added in Java 14. (markt)
- 64097: Replace the faulty custom services lookup used for `ExpressionFactory` implementations with `ServiceLoader`. (markt)
- Add a `META-INF/services` entry to jasper-el.jar so that the Expression Language implementation can be discovered via the services API. (markt)

#### Cluster

- 64043: Ensure that session ID changes are replicated during form-authentication. (kfujino)

#### Web applications

- 64000: In the examples web application, where a Servlet example includes i18n support, the Locale used should be based on the request locale and not the server locale. (markt)
- Add additional information on securing AJP/1.3 Connectors. (markt)

#### Other

- 63995: Ensure statements are closed when a pooled JDBC connection is passivated in Tomcat's fork of Commons DBCP2. (markt)

### 2019-12-12 Tomcat 9.0.30 (markt)

#### Catalina

- 63681: Introduce RealmBase#authenticate(GSSName, GSSCredential) and friends. (michaelo)
- 63964: Correct a regression in the static resource caching changes introduced in 9.0.28. URLs constructed from URLs obtained from the cache could not be used to access resources. (markt)
- 63970: Correct a regression in the static resource caching changes introduced in 9.0.28. Connections to URLs obtained for JAR resources could not be cast to `JarURLConnection`. (markt)
- 63937: Add a new attribute to the standard `Authenticator` implementations, `allowCorsPreflight`, that allows the `Authenticator`s to be configured to allow CORS preflight requests to bypass authentication as required by the CORS specification. (markt)
- 63939: Correct the same origin check in the CORS filter. An origin with an explicit default port is now considered to be the same as an origin without a default port and origins are now compared in a case-sensitive manner as required by the CORS specification. (markt)
- 63981: Allow multiple calls to `Registry.disableRegistry()` without the second and subsequent calls triggering the logging of a warning. Based on a patch by Andy Wilkinson. (markt)
- 63982: CombinedRealm makes assumptions about principal implementation (michaelo)
- 63983: Correct a regression in the static resource caching changes introduced in 9.0.28. A large number of file descriptors were opened that could reach the OS limit before being released by GC. (markt)
- 63987: Deprecate `Realm.getRoles(Principal)`. (michaelo)
- Add a unit test for the session `FileStore` implementation and refactor loops in `FileStore` to use the ForEach style. Pull request provided by Govinda Sakhare. (markt)
- Moved server-side include (SSI) module into a separate JAR library. (schultz)
- Refactor FORM authentication to reduce duplicate code and to ensure that the authenticated Principal is not cached in the session when caching is disabled. This is the fix for CVE-2019-17563. (markt/kkolinko)

#### Coyote

- Fix endpoint closeSocket and destroySocket discrepancies, in particular in the APR connector. (remm)
- Harmonize maxConnections default value to 8192 across all connectors. (remm)
- 63931: Improve timeout handling for asyncIO to ensure that blocking operations see a `SocketTimeoutException` if one occurs. (remm/markt)
- 63932: By default, do not compress content that has a strong ETag. This behaviour is configurable for the HTTP/1.1 and HTTP/2 connectors via the new Connector attribute `noCompressionStrongETag`. (markt)
- 63949: Fix non blocking write problems with NIO due to the need for a write loop. (remm)
- Simplify regular endpoint writes by removing write(Non)BlockingDirect. All regular writes will now be buffered for a more predictable behavior. (remm)
- Send an exception directly to the completion handler when a timeout exception occurs for the operation, and add a boolean to make sure the completion handler is called only once. (remm/markt)
- When reporting / logging invalid HTTP headers encode any non-printing characters using the 0xNN form. (markt)

#### WebSocket

- Ensure a couple of very unlikely concurrency issues are avoided when writing WebSocket messages. (markt)

#### Web applications

- Fix the broken re-try link on the error page for the FORM authentication example in the JSP section of the examples web application. (markt)
- Improvements to CsrfPreventionFilter: additional logging, allow the CSRF nonce request parameter name to be customized. (schultz)
- Correct the documentation for the `maxConnections` attribute of the `Connector` in the documentation web application. (markt)
- Add the ability to set and display session attributes in the JSP FORM authentication example to demonstrate session persistence across restarts for authenticated sessions. (markt)

#### Other

- Correct the fix for 63815 (quoting the use of `CATALINA_OPTS` and `JAVA_OPTS` when used in shell scripts to avoid the expansion of `*`) as it caused various regressions, particularly with `daemon.sh`. (markt)
- Update the OWB module to Apache OpenWebBeans 2.0.13. (remm)
- Support Java 11 in Graal Native Images with Graal 19.3+. (remm)
- Expand the search made by the Windows installer for a suitable Java installation to include the 64-bit JDK registry entries and the `JAVA_HOME` environment variable. Pull request provided by Alexander Norz. (markt)
- Expand the coverage of the Korean translations provided with Apache Tomcat. (woonsan)
- Expand the coverage of the French translations provided with Apache Tomcat. (remm)
- Expand the coverage of the Chinese translations provided with Apache Tomcat. Contributions provided by lins and 磊. (markt)
- Update the internal fork of Apache Commons BCEL to ff6941e (2019-12-06, 6.4.2-dev). Code clean-up only. (markt)
- Update the internal fork of Apache Commons Codec to 9637dd4 (2019-12-06, 1.14-SNAPSHOT). Code clean-up and a fix for CODEC-265. (markt)
- Update the internal fork of Apache Commons FileUpload to 2317552 (2019-12-06, 2.0-SNAPSHOT). Refactoring. (markt)
- Update the internal fork of Apache Commons Pool 2 to 6092f92 (2019-12-06, 2.8.0-SNAPSHOT). Clean-up and minor refactoring. (markt)
- Update the internal fork of Apache Commons DBCP 2 to a36390 (2019-12-06, 2.7.1-SNAPSHOT). Minor refactoring. (markt)

### 2019-11-21 Tomcat 9.0.29 (markt)

#### Catalina

- Refactor JMX remote RMI registry creation. This is the fix for CVE-2019-12418. (remm)
- Improvement to CsrfPreventionFilter: expose the latest available nonce as a request attribute; expose the expected nonce request parameter name as a context attribute. (schultz)

#### Coyote

- 63835: Add support for Keep-Alive response header. (michaelo)
- Correct a logic bug in the `NioEndpoint` timeout handling that meant a write timeout could be handled as a read timeout. (markt)

#### Web applications

- Add a warning regarding potential poor performance of the HTTP and AJP connectors if `socket.txBufSize` is configured with an explicit value rather than using the JVM default. (markt)

#### Other

- Improve OWB module based using custom shade appender. (remm)
- Add security filter in OWB module in addition to the valve for more flexibility. (remm)

### not released Tomcat 9.0.28 (markt)

#### Catalina

- Bad paths for URIs can cause exceptions on Windows due to its path separator, so wrap using an IOException. (remm)
- 63832: Properly mark container as FAILED when a JVM error occurs on stop. (remm)
- Add more details on the usage of `RewriteMap` functionality in the `RewriteValve`. (fschumacher)
- 63836 Ensure that references to the Host object are cleared once the Host instance is destroyed. (markt)
- Ensure that, when static resource caching is enabled for a web application, all access to static files (including JSP files) goes via the cache so that a consistent view of the static files is seen. Prior to this change it was possible to see an updated last modified time but the content would be that prior to the modification. (markt)
- 63905 Clean up Tomcat CSS. (michaelo)
- 63909: When the `ExpiresFilter` is used without a default and the response is served by the Default Servlet, ensure that the filter processes the response if the Default Servlet sets a 304 (Not Found) status code. (markt)

#### Coyote

- Ensure that `ServletRequest.isAsyncStarted()` returns `false` once `AsyncContext.complete()` or `AsyncContext.dispatch()` has been called during `AsyncListener.onTimeout()` or `AsyncListener.onError()`. (markt)
- 63816 and 63817: Correctly handle I/O errors after asynchronous processing has been started but before the container thread that started asynchronous processing has completed processing the current request/response. (markt)
- 63825: When processing the `Expect` and `Connection` HTTP headers looking for a specific token, be stricter in ensuring that the exact token is present. (markt)
- 63829: Improve the check of the `Content-Encoding` header when looking to see if Tomcat is serving pre-compressed content. Ensure that only a full token is matched and that the match is case insensitive. (markt)
- 63864: Refactor parsing of the `transfer-encoding` request header to use the shared parsing code and reduce duplication. (markt)
- 63865: Add `Unset` option to same-site cookies and pass through `None` value if set by user. Patch provided by John Kelly. (markt)
- 63879: Remove stack trace from debug logging on socket wrapper close. (remm)
- Add connection tracking on the connector endpoint to remove excessive concurrency in the protocol handler when maintaining an association between the socket wrapper and its current processor. (remm)
- 63894: Ensure that the configured values for `certificateVerification` and `certificateVerificationDepth` are correctly passed to the OpenSSL based SSLEngine implementation. (remm/markt)
- Improve cleanup after errors when setting socket options. (remm)
- 63859: Do not perform a blocking read after a `CPING` message is received by the AJP connector because, if the JK Connector is configured with `ping_mode="I"`, the `CPING` message will not always be followed by the start of a request. (markt)
- Properly calculate all dynamic parts of the ErrorReportValve response on the fly in `org.apache.coyote.http2.TestHttp2InitialConnection`. (michaelo)

#### Jasper

- 63897: Capture the timestamp of a JSP for the purposes of modification tracking before the JSP is compiled to prevent a race condition if the JSP is modified during compilation. Patch provided by Karl von Randow. (markt)
- Fix a race condition that could mean changes to a modified JSP were not visible to end users. (markt)

#### WebSocket

- 63913: Wrap any `NullPointerException`s throw by the `Inflater` or `Deflater` used by the `PerMessageDeflate` extension in an `IOException` so that the error can be caught and handled by the WebSocket error handling mechanism. (markt)

#### Web applications

- Correct the description of the default value for the server attribute in the security How-To. (markt)

#### Other

- 63815: Quote the use of `CATALINA_OPTS` and `JAVA_OPTS` when used in shell scripts to avoid the expansion of `*`. Note that any newlines present in `CATALINA_OPTS` and/or `JAVA_OPTS` will no longer removed. (markt)
- 63826: Remove `commons-daemon-native.tar.gz` and `tomcat-native.tar.gz` from the binary zip distributions for Windows since compiled versions of those components are already included within the zip distributions. (markt)
- 63838: Suppress reflexive access warnings when running the unit tests on the command line. (markt)
- Add missing charsets from the HPE JVM on HP-UX to pass unit tests in `org.apache.tomcat.util.buf.TestCharsetCache`. (michaelo)
- Update the CXF module to Apache CXF 3.3.4. (remm)
- Expand the coverage and quality of the French translations provided with Apache Tomcat. (remm)
- Expand the coverage and quality of the Japanese translations provided with Apache Tomcat. Patch provided by motohashi.yuki. (markt)
- Expand the coverage and quality of the Simplified Chinese translations provided with Apache Tomcat. Contributions provided by rpo130, Mason Shen, leeyazhou, winsonzhao, qingshi huang, Lay, Shucheng Hou and Yanming Zhou. (markt)
- Expand the coverage and quality of the Brazilian Portuguese translations provided with Apache Tomcat. Patch provided by Danielamorais. (markt)

### 2019-10-11 Tomcat 9.0.27 (markt)

#### Catalina

- Correct a regression introduced in 9.0.25 that prevented configuration files from being loaded from the class path. (markt)

#### Coyote

- Use URL safe base 64 encoding rather than standard base 64 encoding when generating or parsing the `HTTP2-Settings` header as part of an HTTP upgrade to `h2c` as required by RFC 7540. (markt)
- 63765: NIO2 should try to unwrap after TLS handshake to avoid edge cases. (remm)
- 63766: Ensure Processor objects are recycled when processing an HTTP upgrade connection that terminates before processing switches to the Processor for the upgraded protocol. (markt)
- Fix a memory leak introduced by the HTTP/2 timeout refactoring in 9.0.23 that could occur when HTTP/2 or WebSocket was used. (markt)

#### Jasper

- Update to the Eclipse JDT compiler 4.13. (markt)
- Add GraalVM specific ELResolver to avoid BeanInfo use in BeanElResolver if possible, as it needs manual reflection configuration. (remm)
- 63781: When performing various checks related to the visibility of classes, fields an methods in the EL implementation, also check that the containing module has been exported. (markt)

#### Web Socket

- 63753: Ensure that the `Host` header in a Web Socket HTTP upgrade request only contains a port if a non-default port is being used. (markt)
- When running on Java 9 and above, don't attempt to instantiate WebSocket Endpoints found in modules that are not exported. (markt)

#### Web Applications

- Add base GraalVM documentation. (remm)
- Add Javadoc for the Common Annotations API implementation. (markt)
- Correct various typos in the comments, error messages and Javadoc. Patch provided by 康智冬. (markt)

#### jdbc-pool

- When connections are validated without an explicit validation query, ensure that any transactions opened by the validation process are committed. Patch provided by Pascal Davoust. (markt)

#### Other

- Deprecate `org.apache.tomcat.util.compat.TLS`. Its functionality was only used for unit tests in `org.apache.tomcat.util.net.TesterSupport` and has been moved there. (rjung)
- 63759: When installing Tomcat with the Windows installer, grant sufficient privileges to enable the uninstaller to execute when user account control is active. (markt)
- Use a build property to define the minimum supported Java version and use that build property to reduce the number of edits required to update the minimum supported Java version. (markt)
- Update the OWB module to Apache OpenWebBeans 2.0.12. (remm)
- Update the CXF module to Apache CXF 3.3.3. (remm)
- 63767: Update to Commons Daemon 1.2.2. This corrects a regression in Commons Daemon 1.2.0 and 1.2.1 that caused the Windows Service to crash on start when running on an operating system that had not been fully updated. (markt)

### 2019-09-19 Tomcat 9.0.26 (markt)

#### Other

- Re-tagged to ensure that the source file for the changelog did not contain an XML byte order mark. (markt)

### not released Tomcat 9.0.25 (markt)

#### Catalina

- Avoid a possible `InvalidPathException` when obtaining a URI for a configuration file. (markt)
- 63684: `Wrapper` never passed to `RealmBase.hasRole()` for given security constraints. (michaelo)
- 63740: Ensure configuration files are loaded correctly when a `Host` is configured with an `xmlBase`. Patch provided by uk4sx. (markt)
- Avoid a potential `NullPointerException` on Service stop if a Service is embedded directly (i.e. with no Server) in an application and JNDI is enabled. Patch provided by S. Ali Tokmen. (markt)
- Add a new `PropertySource` implementation, `EnvironmentPropertySource`, that can be used to do property replacement in configuration files with environment variables. Based on a pull request provided by Thomas Meyer. (markt)

#### Coyote

- 63682: Fix a potential hang when using the asynchronous Servlet API to write the response body and the stream and/or connection window reaches 0 bytes in size. (markt)
- 63690: Use the average of the current and previous sizes when calculating overhead for HTTP/2 `DATA` and `WINDOW_UPDATE` frames to avoid false positives as a result of client side buffering behaviour that causes a small percentage of non-final DATA frames to be smaller than expected. (markt)
- 63706: Avoid NPE accessing https port with plaintext. (remm)
- Correct typos in the names of the configuration attributes `overheadDataThreshold` and `overheadWindowUpdateThreshold`. (markt)
- If the HTTP/2 connection requires an initial window size larger than the default, send a WINDOW_UPDATE to increase the flow control window for the connection so that the initial size of the flow control window for the connection is consistent with the increased value. (markt)
- 63710: When using HTTP/2, ensure that a `content-length` header is not set for those responses with status codes that do not permit one. (markt)
- 63737: Correct various issues when parsing the `accept-encoding` header to determine if gzip encoding is supported including only parsing the first header found. (markt)

#### Jasper

- 63724: Correct a regression introduced in 9.0.21 that broke compilation of JSPs in some configurations. (markt)

#### Web applications

- Correct the source code links on the index page for the ROOT web application to point to Git rather than Subversion. (markt)
- Fix various issues with the Javadoc generated for the documentation web application to enable release builds to be built with Java 10 onwards. (markt)
- 63733: Remove the documentation for the "Additional Components" since they have been removed / merged into the core Tomcat distribution for 9.0.5 onwards. (markt)
- 63739: Correct the invalid `Automatic-Module-Name` manifest entries for the Tomcat provided JARs included in the Tomcat embedded distribution. (markt)
- Fix a large number of Javadoc and documentation typos. Patch provided by KangZhiDong. (markt)
- Spelling and formatting corrections for the cluster how-to. Pull request provided by Bill Mitchell. (markt)

#### Other

- Expand the coverage and quality of the French translations provided with Apache Tomcat. (remm)
- Expand the coverage and quality of the Simplified Chinese translations provided with Apache Tomcat. Includes contributions by leeyazhou and 康智冬. (markt)
- 62140: Additional usage documentation in comments for `catalina.[bat|sh]`. (markt)
- Fix `JSSE_OPTS` quoting in `catalina.bat`. Contributed by Peter Uhnak. (fschumacher)
- 63625: Update to Commons Daemon 1.2.1. This corrects several regressions in Commons Daemon 1.2.1, most notably the Windows Service crashing on start when using 32-bit JVMs. (markt)
- 63689: Correct a regression in the fix for 63285 that meant that when installing a service, the service display name was not set. (markt)
- When performing a silent install with the Windows Installer, ensure that the registry entries are added to the 64-bit registry when using a 64-bit JVM. (markt)
- Remove unused i18n messages and associated translations. Patch provided by KangZhiDong. (markt)
- Expand the coverage and quality of the Korean translations provided with Apache Tomcat. (woonsan)

### 2019-08-17 Tomcat 9.0.24 (markt)

#### Coyote

- Remove the code in the sendfile poller that ensured smaller pollsets were used with older, no longer supported versions of Windows that could not support larger pollsets. (markt)

### not released Tomcat 9.0.23 (markt)

#### Catalina

- 57665: Add support for the `X-Forwarded-Host` header to the `RemoteIpFilter` and `RemoteIpValve`. (markt)
- 62496: Add option to write auth information (remote user/auth type) to response headers. (michaelo)
- 63550: Only try the `alternateURL` in the `JNDIRealm` if one has been specified. (markt)
- 63556: Mark request as forwarded in RemoteIpValve and RemoteIpFilter (michaelo)
- 63579: Correct parsing of malformed OPTIONS requests and reject them with a 400 response rather than triggering an internal error that results in a 500 response. (markt)
- 63608: Align the implementation of the negative match feature for patterns used with the `RewriteValve` with the description in the documentation. (markt)
- 63627: Implement more fine-grained handling in `RealmBase.authenticate(GSSContext, boolean)`. (michaelo)
- If an unhandled exception occurs on a asynchronous thread started via `AsyncContext.start(Runnable)`, process it using the standard error page mechanism. (markt)
- Discard large byte buffers allocated using setBufferSize when recycling the request. (remm)
- Avoid a `NullPointerException` in the `CrawlerSessionManagerValve` if no ROOT Context is deployed and a request does not map to any of the other deployed Contexts. Patch provided by Jop Zinkweg. (markt)
- 63636: `Context.findRoleMapping()` never called in `StandardWrapper.findSecurityReference()`. (michaelo)

#### Coyote

- Refactor the APR poller to always use a single pollset now that the Windows operating systems that required multiple smaller pollsets to be used are no longer supported. (markt)
- 63524: Improve the handling of PEM file based keys and certificates that do not include a full certificate chain when configuring the internal, in-memory key store. Improve the handling of PKCS#1 formatted private keys when configuring the internal, in-memory key store. (markt)
- Add callback when finishing the set properties rule in the digester. (remm)
- 63568: Avoid error when trying to set tcpNoDelay on socket types that do not support it, which can occur when using the NIO inherited channel capability. Submitted by František Kučera. (remm)
- 63570: Fix regression retrieving local address with the NIO connector. Submitted by Aditya Kadakia. (remm)
- Correct parsing of invalid host names that contain bytes in the range 128 to 255 and reject them with a 400 response rather than triggering an internal error that results in a 500 response. (markt)
- 63571: Allow users to configure infinite TLS session caches and/or timeouts. (markt)
- 63578: Improve handling of invalid requests so that 400 responses are returned to the client rather than 500 responses. (markt)
- Fix h2spec test suite failure. It is an error if a Huffman encoded string literal contains the EOS symbol. (jfclere)
- Connections that fail the TLS handshake will now appear in the access logs with a 400 status code. (markt)
- Timeouts for HTTP/2 connections were not always correctly handled leaving some connections open for longer than expected. (markt)
- 63650: Refactor initialisation for JSSE based TLS connectors to enable custom JSSE providers that provide custom cipher suites to be used. (markt)
- Expand the HTTP/2 excessive overhead protection to cover various forms of abusive client behaviour and close the connection if any such behaviour is detected. (markt)
- Fix a crash on shutdown with the APR/native connector when a blocking I/O operation was still in progress when the connector stopped. (markt)

#### Cluster

- Avoid failing Kubernetes membership (and preventing startup) if the stream cannot be opened, to get the same behavior as the DNS based membership. The namespace is still a failure on startup but it is easy to provide. (remm)
- Avoid non fatal NPEs with Tribes when JMX is not available. (remm)
- Make Kube environment optional for Kube memberships, for easier testing and Graal training. A warn log will occur if the environment is not present. (remm)

#### Web applications

- 63597: Update the custom 404 error page for the Host Manager to take account of previous refactoring so that the page is used for 404 errors rather than falling back to the default error page. (markt)

#### Other

- JNDI support for GraalVM native images. (remm)
- JSP runtime library support for GraalVM native images. (remm)
- java.util.logging configuration for GraalVM native images. (remm)
- Update Checkstyle to 8.22. (markt)
- 55969: Tighten up the security of the Apache Tomcat installation created by the Windows installer. Change the default shutdown port used by the Windows installer from `8005` to `-1` (disabled). Limit access to the chosen installation directory to local administrators, Local System and Local Service. (markt)
- 62696: The digital signature for the Windows installer now uses SHA-256 for hashes. (markt)
- 63285: Add an option to `service.bat` so that when installing a Windows service, the name of the executables used by the Windows service may be changed to match the service name. This makes the installation behaviour consistent with the Windows installer. The original executable names will be restored when the Windows service is removed. The renaming can be enabled by using the new `--rename` option after the service name. (markt)
- 63310: Update to Commons Daemon 1.2.0. This provides improved support for Java 11. This also changes the user configured by the Windows installer for the Windows service from `Local System` to the lower privileged `Local Service`. (markt)
- Expand the coverage and quality of the French translations provided with Apache Tomcat. (remm)
- 63555: Add `Automatic-Module-Name` entries for each of the Tomcat provided JARs included in the Tomcat embedded distribution. (markt)
- 63567: Restore the passing of `$LOGGING_MANAGER` to the jvm in `catalina.sh` when calling `stop`. (markt)
- Correct broken OSGi data in JAR file manifests. (markt)
- Add "embed" to the `Bundle-Name` and `Bundle-Symbolic-Name` for the Tomcat embedded WebSocket JAR to align the naming with the other embedded JARs and to differentiate it from the standard WebSocket JAR that does not include the API classes. (markt)
- Update dependency on bnd to 4.2.0. (markt)
- Update the internal fork of Commons Codec to 3ebef4a (2018-08-01) to pick up the fix for CODEC-134. (markt)
- Update the internal fork of Commons Pool2 to 796e32d (2018-08-01) to pick up the changes Commons Pool2 2.7.0. (markt)
- Update the internal fork of Commons DBCP2 to 87d9e3a (2018-08-01) to pick up the changes Commons DBCP2 2.7.0 and DBCP-555. (markt)
- 63648: Update the test TLS keys and certificates used in the test suite to replace the keys and certificates that are about to expire. (markt)

### 2019-07-09 Tomcat 9.0.22 (markt)

#### Catalina

- Improve parsing of Range request headers. (markt)
- Range headers that specify a range unit Tomcat does not recognise should be ignored rather than triggering a 416 response. Based on a pull request by zhanhb. (markt)
- When comparing a date from a `If-Range` header, an exact match is required. Based on a pull request by zhanhb. (markt)
- Add an option to the default servlet to disable processing of PUT requests with Content-Range headers as partial PUTs. The default behaviour (processing as partial PUT) is unchanged. Based on a pull request by zhanhb. (markt)
- Improve parsing of Content-Range headers. (markt)
- Update the recommended minimum Tomcat Native version to 1.2.23. (markt)

#### Coyote

- Remove a source of potential deadlocks when using HTTP/2 when the Connector is configured with `useAsyncIO` as `true`. (markt)
- 63523: Restore SSLUtilBase methods as protected to preserve compatibility. (remm)
- Fix typo in UTF-32LE charset name. Patch by zhanhb via Github. (fschumacher)
- Once a URI is identified as invalid don't attempt to process it further. Based on a PR by Alex Repert. (markt)
- Fix to avoid the possibility of long poll times for individual pollers when using multiple pollers with APR. (markt)
- Refactor the fix for 63205 so it only applies when using PKCS12 keystores as regressions have been reported with some other keystore types. (markt)

#### Jasper

- Include file names if SMAP processor is unable to delete or rename a class file during SMAP generation. (markt)
- Update to the Eclipse JDT compiler 4.12. (markt)

#### WebSocket

- 63521: As required by the WebSocket specification, if a POJO that is deployed as a result of the SCI scan for annotated POJOs is subsequently deployed via the programmatic API ignore the programmatic deployment. (markt)

#### Other

- Switch the check for terminal availability to test for stdin as using stdout does not work when output is piped to another process. Patch provided by Radosław Józwik. (markt)
- Add user buildable optional modules for easier CDI 2 and JAX-RS support. Also include a new documentation page describing how to use it. (remm)

### 2019-06-07 Tomcat 9.0.21 (markt)

#### Catalina

- 57287: Add file sorting to DefaultServlet (schultz)
- Fix `--no-jmx` flag processing, which was called after registry initialization. (remm)
- Ensure that a default request character encoding set on a `ServletContext` is used when calling `ServletRequest#getReader()`. (markt)
- Make a best efforts attempt to clean-up if a request fails during processing due to an `OutOfMemoryException`. (markt)
- Improve the BoM detection for static files handled by the default servlet for the rarely used UTF-32 encodings. Identified by Coverity Scan. (markt)
- Ensure that the default servlet reads the entire global XSLT file if one is defined. Identified by Coverity Scan. (markt)
- Avoid potential `NullPointerException` when generating an HTTP `Allow` header. Identified by Coverity Scan. (markt)
- Add `Context.createInstanceManager()` for easier framework integration. (remm)
- Add utility `org.apache.catalina.core.FrameworkListener` to allow replicating adding a Listener to context.xml in a programmatic way. (remm)
- Move `Container.ADD_CHILD_EVENT` to before the child container start, and `Container.REMOVE_CHILD_EVENT` to before removal of the child from the internal child collection. (remm)
- Remove any fragment included in the target path used to obtain a `RequestDispatcher`. The requested target path is logged as a warning since this is an application error. (markt)

#### Coyote

- NIO poller seems to create some unwanted concurrency, causing rare CI test failures. Add sync when processing async operation to avoid this. (remm)
- Fix concurrency issue that lead to incorrect HTTP/2 connection timeout. (remm/markt)
- Avoid useless exception wrapping in async IO. (remm)
- 63412: Security manager failure when using the async IO API from a webapp. (remm)
- Remove `acceptorThreadCount` Connector attribute, one accept thread is sufficient. As documented, value `2` was the only other sensible value, but without and impact beyond certain microbenchmarks. (remm)
- Avoid possible NPEs on connector stop. (remm)
- Remove `pollerThreadCount` Connector attribute for NIO, one poller thread is sufficient. (remm)
- Add async IO for APR connector for consistency, but disable it by default due to low performance. (remm)
- Avoid blocking write of internal buffer when using async IO. (remm)
- Refactor async IO implementation to the `SocketWrapperBase`. (remm)
- Refactor `SocketWrapperBase` close using an atomic boolean and a `doClose` method that subclasses will implement, with a guarantee that it will be run only once. (remm)
- Decouple the socket wrapper, which is not recycled, from the NIOx channel after close, and replace it with a dummy static object. (remm)
- Clear buffers on socket wrapper close. (remm)
- NIO2 failed to properly close sockets on connector stop. (remm)
- Reduce the default for `maxConcurrentStreams` on the `Http2Protocol` from 200 to 100 to align with typical defaults for HTTP/2 implementations. (markt)
- Reduce the default HTTP/2 header list size from 4GB to 32kB to align with typical HTTP/2 implementations. (markt)
- Add support for same-site cookie attribute. Patch provided by John Kelly. (markt)
- Drop legacy NIO double socket close (close channel, then close socket). (remm)
- Fix HTTP/2 end of stream concurrency with async. (remm)
- Correct a bug in the stream flushing code that could lead to multiple threads processing the stream concurrently which in turn could cause errors processing the stream. (markt)

#### Cluster

- 62841: Refactor the `DeltaRequest` serialization to reduce the window during which the `DeltaSession` is locked and to remove a potential cause of deadlocks during serialization. (markt)
- 63441: Further streamline the processing of session creation messages in the `DeltaManager` to reduce the possibility of a session update message being processed before the session has been created. (markt)

#### WebSocket

- Fix timeout logic for async non blocking writes. Identified by Coverity Scan. (remm)

#### Web applications

- Expand the explanation of how deprecated TLS configuration attributes are converted to the new TLS configuration style. (markt)

#### Tribes

- Treat `NoRouteToHostException` the same way as `SocketTimeoutException` when checking the health of group members. This avoids a SEVERE log message every time the check is performed when the host associated with a group member is not powered on. (markt)

#### Other

- Switch from FindBugs to SpotBugs. (fschumacher)
- Start Graal native image compatibility, using the tomcat-maven packaging. (remm)
- 63403: Fix TestHttp2InitialConnection test failures when running with a non-English locale. (kkolinko)
- Add Graal JreCompat, and use it to disable JMX and URL stream handlers. (remm)
- Expand the coverage and quality of the Czech translations provided with Apache Tomcat. Includes contributions by Arnošt Havelka. (markt)
- Expand the coverage and quality of the German translations provided with Apache Tomcat. Includes contributions by Niklasmerz, dusiema and Jens. (markt)
- Expand the coverage and quality of the French translations provided with Apache Tomcat. (remm)
- Expand the coverage and quality of the Simplified Chinese translations provided with Apache Tomcat. Includes contributions by 諵. (markt)
- Use the `test` command to check for terminal availability rather than the `tty` command since the `tty` based test fails on non-English locales. (markt)

### 2019-05-13 Tomcat 9.0.20 (markt)

#### Catalina

- Fix some edge cases where the docBase was not being set using a canonical path which in turn meant resource URLs were not being constructed as expected. (markt)
- Fix a potential resource leak when executing CGI scripts from a WAR file. Identified by Coverity scan. (markt)
- Fix a potential concurrency issue in the StringCache identified by Coverity scan. (markt)
- Fix a potential concurrency issue in the main Sendfile thread of the APR connector. Identified by Coverity scan. (markt)
- Fix a potential resource leak when running a web application from a WAR file. Identified by Coverity scan. (markt)
- Fix a potential resource leak on some exception paths in the `DataSourceRealm`. Identified by Coverity scan. (markt)
- Fix a potential resource leak on an exception path when parsing JSP files. Identified by Coverity scan. (markt)
- Fix a potential resource leak when a JNDI lookup returns an object of an in compatible class. Identified by Coverity scan. (markt)
- Refactor `ManagerServlet` to avoid loading classes when filtering JNDI resources for resources of a specified type. (markt)
- 63324: Refactor the `CrawlerSessionManagerValve` so that the object placed in the session is compatible with session serialization with mem-cached. Patch provided by Martin Lemanski. (markt)
- 63358: Expand the `throwOnFailure` support in the `Connector` to include the adding of a `Connector` to a running `Service`. (markt)
- 63361: Add a new method (`Registry.disableRegistry()`) that can be used to disable JMX registration of Tomcat components providing it is called before the first component is registered. (markt)
- Avoid `OutOfMemoryError`s and `ArrayIndexOutOfBoundsException`s when accessing large files via the default servlet when resource caching has been disabled. (markt)
- Avoid a `NullPointerException` when a `Context` is defined in `server.xml` with a `docBase` but not the optional `path`. (markt)
- 63333: Override the `isAvailable()` method in the `JAASRealm` so that only login failures caused by invalid credentials trigger account lock out when the `LockOutRealm` is in use. Patch provided by jchobantonov. (markt)
- Add `--no-jmx` flag to allow disabling JMX in `startup.Tomcat.main`. (remm)

#### Coyote

- The `useAsyncIO` boolean attribute on the Connector element value now defaults to `true`. (remm)
- Possible HTTP/2 connection leak issue when using async with NIO. (remm)
- Fix socket close discrepancies for NIO, now the wrapper close is used everywhere except for socket accept problems. (remm)
- Implement poller timeout when using async IO with NIO. (remm)
- Avoid creating and using object caches when they are disabled. (remm)
- When running on newer JREs that don't support SSLv2Hello, don't warn that it is not available unless explicitly configured. (markt)
- Change default value of `pollerThreadCount` of NIO to `1`. (remm)
- Associate BlockPoller thread name with its NIO connector for better readability. (remm)
- The async HTTP/2 frame parser should tolerate concurrency so clearing shared buffers before attempting a read is not possible. (remm)
- Update the HTTP/2 connection preface and initial frame reading to be asynchronous instead of blocking IO. (remm)
- Refactor Hostname validation to improve performance. Patch provided by Uwe Hees. (markt)
- Add additional NIO2 style read and write methods closer to core NIO2, for possible use with an asynchronous workflow like CompletableFuture. (remm)
- Expand HTTP/2 timeout handling to include connection window exhaustion on write. This is the fix for CVE-2019-10072. (markt)

#### Jasper

- 63359: Ensure that the type conversions used when converting from strings for `jsp:setProperty` actions are correctly implemented as per section JSP.1.14.2.1 of the JSP 2.3 specification. (markt)

#### Other

- 63335: Ensure that stack traces written by the `OneLineFormatter` are fully indented. The entire stack trace is now indented by an additional TAB character. (markt)
- 63370: Message files (LocalStrings_*.properties) of the examples webapp not converted to ascii. (woonsan)
- Expand the coverage and quality of the French translations provided with Apache Tomcat. (remm)
- Expand the coverage and quality of the Japanese translations provided with Apache Tomcat. Includes contributions by motohashi.yuki. (markt)
- Expand the coverage and quality of the Czech translations provided with Apache Tomcat. Includes contributions by Arnošt Havelka. (markt)
- When using the `OneLineFormatter`, don't print a blank line in the log after printing a stack trace. (markt)
- Update the internal fork of Apache Commons FileUpload to 41e4047 (2019-04-24) pick up some enhancements. (markt)
- Update the internal fork of Apache Commons DBCP 2 to dcdbc72 (2019-04-24) to pick up some clean-up and enhancements. (markt)
- Update the internal fork of Apache Commons Pool 2 to 0664f4d (2019-04-30) to pick up some enhancements and bug fixes. (markt)

### 2019-04-13 Tomcat 9.0.19 (markt)

#### Catalina

- Fix wrong JMX registration regression in 9.0.18. (remm)

#### Coyote

- Add vectoring for NIO in the base and SSL channels. (remm)
- Add asynchronous IO from NIO2 to the NIO connector, with support for the async IO implementations for HTTP/2 and Websockets. The `useAsyncIO` boolean attribute on the Connector element allows enabling use of the asynchronous IO API. (remm)

#### Other

- Ensure that the correct files are included in the source distribution for javacc based parsers depending on whether jjtree is used or not. (markt)
- Ensure that text files in the source distribution have the correct line endings for the target platform. (markt)

### not released Tomcat 9.0.18 (markt)

#### Catalina

- 63196: Provide a default (`X-Forwarded-Proto`) for the `protocolHeader` attribute of the `RemoteIpFilter` and `RemoteIpValve`. (markt)
- 63235: Refactor Charset cache to reduce start time. (markt)
- 63249: Use a consistent log level (`WARN`) when logging the failure to register or deregister a JMX Bean. (markt)
- 63249: Use a consistent log level (`ERROR`) when logging the `LifecycleException` associated with the failure to start or stop a component. (markt)
- When the SSI directive `fsize` is used with an invalid target, return a file size of `-` rather than `1k`. (markt)
- 63251: Implement a work-around for a known JRE bug (JDK-8194653) that may cause a dead-lock when Tomcat starts. (markt)
- 63275: When using a `RequestDispatcher` ensure that `HttpServletRequest.getContextPath()` returns an encoded path in the dispatched request. (markt)
- Add optional listeners for Server/Listener, as a slight variant of a standard listener. The difference is that loading is not fatal when it fails. This would allow adding example configuration to the standard server.xml if deemed useful. Storeconfig will not attempt to persist the new listener. (remm)
- 63286: Document the differences in behaviour between the `LogFormat` directive in httpd and the `pattern` attribute in the `AccessLogValve` for `%D` and `%T`. (markt)
- 63287: Make logging levels more consistent for similar issues of similar severity. (markt)
- 63311: Add support for https URLs to the local resolver within Tomcat used to resolve standard XML DTDs and schemas when Tomcat is configured to validate XML configuration files such as web.xml. (markt)
- Encode the output of the SSI `printenv` command. This is the fix for CVE-2019-0221. (markt)
- Use constants for SSI encoding values. (markt)
- When the CGI Servlet is configured with `enableCmdLineArguments` set to true, limit the encoded form of the individual command line arguments to those values allowed by RFC 3875. This restriction may be relaxed by the use of the new initialisation parameter `cmdLineArgumentsEncoded`. (markt)
- When the CGI Servlet is configured with `enableCmdLineArguments` set to true, limit the decoded form of the individual command line arguments to known safe values when running on Windows. This restriction may be relaxed by the use of the new initialisation parameter `cmdLineArgumentsDecoded`. This is the fix for CVE-2019-0232. (markt)

#### Coyote

- Fix bad interaction between NIO2 async read API and the regular read. (remm)
- Refactor NIO2 write pending strategy for the classic IO API. (remm)
- Restore original maxConnections default for NIO2 as the underlying close issues have been fixed. (remm)
- Harmonize NIO2 isReadyForWrite with isReadyForRead code. (remm)
- When using a JSSE TLS connector that supported ALPN (Java 9 onwards) and a protocol was not negotiated, Tomcat failed to fallback to HTTP/1.1 and instead dropped the connection. (markt)
- Correct a regression in the TLS connector refactoring in Tomcat 9.0.17 that prevented the use of PKCS#8 private keys with OpenSSL based connectors. (markt)
- Fix NIO2 SSL edge cases. (remm)
- When performing an upgrade from HTTP/1.1 to HTTP/2, ensure that any query string present in the original HTTP/1.1 request is passed to the HTTP/2 request processing. (markt)
- When Tomcat writes a final response without reading all of an HTTP/2 request, reset the stream to inform the client that the remaining request body is not required. (markt)

#### Jasper

- Add support for specifying Java 11 (with the value `11`) as the compiler source and/or compiler target for JSP compilation. (markt)
- Add support for specifying Java 12 (with the value `12`) and Java 13 (with the value `13`) as the compiler source and/or compiler target for JSP compilation. If used with an ECJ version that does not support these values, a warning will be logged and the latest supported version will used. Based on a patch by Thomas Collignon. (markt)

#### Web applications

- 63184: Expand the SSI documentation to provide more information on the supported directives and their attributes. Patch provided by nightwatchcyber. (markt)
- Add a note to the documentation about the risk of DoS with poorly written regular expressions and the `RewriteValve`. Patch provided by salgattas. (markt)

#### jdbc-pool

- Improved maxAge handling. Add support for age check on idle connections. Connection that expired reconnects rather than closes it. Patch provided by toby1984. (kfujino)
- 63320: Ensure that `StatementCache` caches statements that include arrays in arguments. (kfujino)

#### Other

- Update to the Eclipse JDT compiler 4.10. (markt)
- Expand the coverage and quality of the Spanish translations provided with Apache Tomcat. Includes contributions by Ulises Gonzalez Horta. (markt)
- Expand the coverage and quality of the Czech translations provided with Apache Tomcat. Includes contributions by Arnošt Havelka. (markt)
- Expand the coverage and quality of the Chinese translations provided with Apache Tomcat. Includes contributions by winsonzhao and wjt. (markt)
- Expand the coverage and quality of the Russian translations provided with Apache Tomcat. (kkolinko)
- Expand the coverage and quality of the Japanese translations provided with Apache Tomcat. (kfujino)
- Expand the coverage and quality of the Korean translations provided with Apache Tomcat. (woonsan)
- Expand the coverage and quality of the German translations provided with Apache Tomcat. (fschumacher)
- Expand the coverage and quality of the French translations provided with Apache Tomcat. (remm)

### 2019-03-18 Tomcat 9.0.17 (markt)

#### Catalina

- Refactor how cookies are transferred from the base request to a `PushBuilder` so that they are accessible, and may be edited, via the standard `PushBuilder` methods for working with HTTP headers. (markt)
- Simplify the value of `jarsToSkip` property in `catalina.properties` file for tomcat-i18n jar files. Use prefix pattern instead of listing each language. (kkolinko)
- Restore the getter and setter for the access log valve attribute `maxLogMessageBufferSize` that were accidentally removed. (markt)
- 63206: Add a new attribute to `Context` - `createUploadTargets` which, if `true` enables Tomcat to create the temporary upload location used by a Servlet if the location specified by the Servlet does not already exist. The default value is `false`. (markt)
- 63210: Ensure that the Apache Commons DBCP 2 based default connection pool is correctly shutdown when it is no longer required. This ensures that a non-daemon thread is not left running that will prevent Tomcat from shutting down cleanly. (markt)
- 63213: Ensure the correct escaping of group names when searching for nested groups when the JNDIRealm is configured with `roleNested` set to `true`. (markt)
- 63236: Use `String.intern()` as suggested by Phillip Webb to reduce memory wasted due to String duplication. This changes saves ~245k when starting a clean installation. With additional thanks to YourKit Java profiler for helping to track down the wasted memory and the root causes. (markt)
- 63246: Fix a potential `NullPointerException` when calling `AsyncContext.dispatch()`. (markt)
- Always use the absolute path of the `docBase` during the deployment process to determine the Context name, deployment type, whether the `docBase` is located within the `appBase` etc. (markt)

#### Coyote

- When performing an HTTP/1.1 upgrade to HTTP/2 (h2c) ensure that the hostname and port from the HTTP/1.1 Host header of the upgraded request are made available via the standard methods `ServletRequest.getServerName()` and `ServletRequest.getServerPort()`. (markt)
- Refactor the APR/Native endpoint TLS configuration code to enable JSSE style configuration - including JKS keystores - to be used with the APR/Native connector. (markt)
- With the TLS configuration refactoring, the configuration attributes `sessionCacheSize` and `sessionTimeout` are no longer limited to JSSE implementations. They may now be used with OpenSSL implementations as well. (markt)
- Refactor NIO2 read pending strategy for the classic IO API. (remm)
- 63182: Avoid extra read notifications for HTTP/1.1 with NIO2 when using asynchronous threads. (remm)
- 63205: Add a work-around for a known JRE KeyStore loading bug. (markt)
- NIO2 should try to use SocketTimeoutException everywhere rather than a mix of it and InterruptedByTimeout. (remm)
- Correct an error in the request validation that meant that HTTP/2 push requests always resulted in a 400 response. (markt)
- 63223: Correctly account for push requests when tracking currently active HTTP/2 streams. (markt)
- Ensure enough buffer space when using TLS with NIO2 by using the main read buffer to store additional decrypted data. (remm)
- Verify HTTP/2 stream is still writable before assuming a timeout occurred. (remm)
- Avoid some overflow cases with OpenSSL to improve efficiency, as the OpenSSL engine has an internal buffer. (remm)
- Harmonize HTTP/1.1 NIO2 keepalive code. (remm)

#### WebSocket

- Remove the `STREAMS_DROP_EMPTY_MESSAGES` system property that was introduced to work-around four failing TCK tests. An alternative solution has been implemented. Sending messages via `getSendStream()` and `getSendWriter()` will now only result in messages on the wire if data is written to the `OutputStream` or `Writer`. Writing zero length data will result in an empty message. Note that sending a message via an `Encoder` may result in the message being send via `getSendStream()` or `getSendWriter()`. (markt)

#### Web applications

- Fix messages used by Manager and Host Manager web applications. Disambiguate message keys used when adding or removing a host. Improve display of summary values on the status page: separate terms and values with a whitespace. Improve wording of messages for expire sessions command. (kkolinko)
- Do not add CSRF nonce parameter and suppress Referer header for external links in Manager and Host Manager web applications. (kkolinko)

#### Tribes

- Add feature that discover local member from the static member list. (kfujino)
- Ensure that members registered in the addSuspects list are static members. (kfujino)

#### Other

- Expand the coverage and quality of the French translations provided with Apache Tomcat. (remm)
- 63041: Revert the changes for 53930 that added support for the `CATALINA_OUT_CMD` environment variable as they prevented correct operation with systemd configurations that did not explicitly specify a PID file. (markt)
- Expand the coverage and quality of the Russian translations provided with Apache Tomcat. (kkolinko)
- Fix the artifactId of `tomcat-i18n-cs`. (rjung)
- Expand the coverage and quality of the Korean translations provided with Apache Tomcat. (woonsan)
- Expand the coverage and quality of the Chinese translations provided with Apache Tomcat. Includes contributions by winsonzhao. (markt)
- Expand the coverage and quality of the Czech translations provided with Apache Tomcat. Includes contributions by Arnošt Havelka. (markt)
- Expand the coverage and quality of the Spanish translations provided with Apache Tomcat. Includes contributions by Ulises Gonzalez Horta. (markt)

### 2019-02-08 Tomcat 9.0.16 (markt)

#### Web applications

- Use client's preferred language for the Server Status page of the Manager web application. Review and fix several cases when the client's language preference was not respected in Manager and Host Manager web applications. (kkolinko)
- 63141: Ensure that translated manager response strings still start with `OK -` where expected by the associated Ant tasks. (markt)
- 63143: Ensure that the Manager web application respects the language preferences of the user as configured in the browser when the language of the default system locale is not English. (markt)

#### Tribes

- Remove unnecessary shutdown for executor. (kfujino)

#### Other

- Update the NSIS Installer used to build the Windows installer to version 3.04. (markt)
- Add Czech translations to Apache Tomcat. Includes contributions from Arnošt Havelka and Alice. (markt)
- Expand the coverage and quality of the Spanish translations provided with Apache Tomcat. Includes contributions from Ulises Gonzalez Horta. (markt)
- Expand the coverage and quality of the French translations provided with Apache Tomcat. (remm)
- Expand the coverage and quality of the Korean translations provided with Apache Tomcat. (woonsan)
- Expand the coverage and quality of the Japanese translations provided with Apache Tomcat. Includes contributions from Yujiorama. (markt)
- Expand the coverage and quality of the Chinese translations provided with Apache Tomcat. Includes contributions from zheng. (markt)
- Expand the coverage and quality of the Russian translations provided with Apache Tomcat. (kkolinko)

### not released Tomcat 9.0.15 (markt)

#### Catalina

- 54741: Add a new method, `Tomcat.addWebapp(String,URL)`, that allows a web application to be deployed from a URL when using Tomcat in embedded mode. (markt)
- 63002: Fix setting rewrite qsdiscard flag. (remm)
- Implement the requirements of section 8.2.2 2c of the Servlet specification and prevent a web application from deploying if it has fragments with duplicate names and is configured to use relative ordering of fragments. (markt)
- Ensure that the HEAD response is consistent with the GET response when `HttpServlet` is relied upon to generate the HEAD response and the GET response uses chunking. (markt)
- Ensure that the `ServletOutputStream` implementation is consistent with the requirements of asynchronous I/O and that all of the write methods use a single write rather than multiple writes. (markt)
- Correct the Javadoc for `Context.getDocBase()` and `Context.setDocBase()` and remove text that indicates that a URL may be used for the `docBase` as this has not been the case for quite some time. (markt)
- Add basic health check valve. (remm)
- Correct a bug exposed in 9.0.14 and ensure that the Tomcat terminates in a timely manner when running as a service. (markt)
- Log a message when using a Connector that requires Apr without enabling the AprLifecycleListener first. (csutherl)
- Utility thread count for special negative or zero values will again be based on Runtime.getRuntime().availableProcessors(). (remm)
- Treat I/O errors during request body reads the same way as I/O errors during response body writes. The errors are treated as client side errors rather than server side errors and only logged at debug level. (markt)
- 63038: Ensure that a `ClassNotFoundException` is thrown when attempting to load a class from a corrupted JAR file. (markt)
- 63078: Ensure the utility thread pool is at least two, as the deployer uses a blocking pattern. (remm, markt)
- Make the removal of leading and trailing whitespace from credentials passed to BASIC authentication configurable via a new attribute, `trimCredentials` on the `BasicAuthenticator`. (markt)
- 63003: Extend the `unloadDelay` attribute on a `Context` to include in-flight asynchronous requests. (markt)
- 63026: Add a new attribute, `forceDnHexEscape`, to the `JNDIRealm` that forces escaping in the String representation of a distinguished name to use the `\nn` form. This may avoid issues with realms using Active Directory which appears to be more tolerant of optional escaping when the `\nn` form is used. (markt)
- Avoid a swallowed (and therefore ignored) access failure during web application class loading when running under a `SecurityManager`. (markt)
- Add SSL configuration options to the JMX remote listener using the `SSLHostConfig` framework. (remm)
- Update the recommended minimum Tomcat Native version to 1.2.21. (markt)
- 63137: If the resources for a web application have been configured with multiple locations mapped to `/WEB-INF/classes`, ensure that all of those locations are used when building the web application class path. Patch provided by Marcin Gołębski. (markt)

#### Coyote

- 63009: Include the optional `content-length` header in HTTP/2 responses where an appropriate value is available. (markt)
- 63022: Do not use the socket open state when using the wrapper isClosed method for NIO and NIO2, as it will disable all further processing. (remm)
- Fix socket close discrepancies for NIO2, now the wrapper close is used everywhere except for socket accept problems. (remm)
- Fix use of write timeout instead of read timeout for HTTP/2 NIO2 frame read. (remm)
- Fix incorrect APR sendfile thread stop. (remm)

#### Jasper

- 63056: Correct a regression in the fix for 53737 that did not correctly scan the web application directory structure for JSPs. (markt)
- Update the performance optimisation for using expressions in tags that depend on uninitialised tag attributes with implied scope to make the performance optimisation aware of the new public class (`java.lang.Enum$EnumDesc`) added in Java 12. (markt)

#### WebSocket

- 57974: Ensure implementation of `Session.getOpenSessions()` returns correct value for both client-side and server-side calls. (markt)
- 63019: Use payload remaining bytes rather than limit when writing. Submitted by Benoit Courtilly. (remm)
- When running under a `SecurityManager`, ensure that the `ServiceLoader` look-up for the default `javax.websocket.server.ServerEndpointConfig.Configurator` implementation completes correctly rather than silently using the hard-coded fall-back. (markt)
- Ensure that the network connection is closed if the client receives an I/O error trying to communicate with the server. (markt)
- Ignore synthetic methods when scanning POJO methods. (markt)
- Implement the requirements of section 5.2.1 of the WebSocket 1.1 specification and ensure that if the deployment of one Endpoint fails, no Endpoints are deployed for that web application. (markt)
- Implement the requirements of section 4.3 of the WebSocket 1.1 specification and ensure that the deployment of an Endpoint fails if `@PathParam` is used with an invalid parameter type. (markt)
- Ensure a `DeploymentException` rather than an `IllegalArgumentException` is thrown if a method annotated with `@OnMessage` does not conform to the requirements set out in the Javadoc. (markt)
- Improve algorithm that determines if two `@OnMessage` annotations have been added for the same message type. Prior to this change some matches were missed. (markt)

#### Web applications

- 63103: Remove the unused source.jsp file and associated tag from the examples web application as it is no longer used. (markt)

#### Tribes

- Add dns-ping support to enumerate cluster members. This is much simpler than getting the pod list but it does not indicate pod status. Submitted by Maxime Beck. (remm)
- Never expire the local member from a Membership. (remm)

#### Other

- Update container image with monitoring contraptions. (remm)
- Expand the coverage and quality of the Korean translations provided with Apache Tomcat. Includes contributions from woonsan and Chris Cho. (markt)
- Expand the coverage and quality of the Japanese translations provided with Apache Tomcat. Includes contributions from kfujino, Yujiorama and motohashi.yuki. (markt)
- Expand the coverage and quality of the French translations provided with Apache Tomcat. Includes contributions from remm, Ludovic Pénet and evernat. (markt)
- Expand the coverage and quality of the German translations provided with Apache Tomcat. Includes contributions from fschumacher, Stefan and burghard. (markt)
- Expand the coverage and quality of the Chinese (simplified) translations provided with Apache Tomcat. Includes contributions from winsonzhao, Lanranzi, shawn, Winsonzhoa, JinXiqian, RichardHo, qingshi huang, Greenman0007, Jim Ma, huxing, 袁宇杰 and evernat. (markt)
- Expand the coverage and quality of the Spanish translations provided with Apache Tomcat. Includes contributions from Ulises Gonzalez Horta, Israel, Eduardo Quintanilla and Miguel Ortega. (markt)
- Expand the coverage and quality of the Russian translations provided with Apache Tomcat. Includes contributions from Andrei Maiseyenka and solomax. (markt)
- Expand the coverage and quality of the Brazilian Portuguese translations provided with Apache Tomcat. Includes contributions from Victor Caetano and Dabilo. (markt)
- 63041: Correct a regression in the fix for 53930 that prevented Tomcat from working correctly with systemd. Patch provided by Patrik S. (markt)
- 63072: Remove extras (JMX remote listener and webservices object factories) and merge them back into the core build. (remm)
- Update the internal fork of Apache Commons FileUpload to pick up the changes in the Apache Commons FileUpload 1.4 release. (markt)
- Update the internal fork of Apache Commons DBCP 2 to de20b77 (2019-01-29) to pick up some bug fixes and enhancements. (markt)
- Update the packaged version of the Tomcat Native Library to 1.2.21 to pick up the memory leak fixes when using NIO/NIO2 with OpenSSL. (markt)

### 2018-12-12 Tomcat 9.0.14 (markt)

#### Catalina

- 62788: Add explicit logging configuration to write log files using UTF-8 to align with Tomcat's use of UTF-8 by default elsewhere. (markt)
- The default Servlet should not override a previously set content-type. (remm)
- Fix storeconfig for the cluster encryption interceptor key attribute. (remm)
- Add a scheduled executor to the Server, which can be used to process periodic utility tasks. The utility threads are non daemon by default. (remm)
- Refactor container background processor using the Server executor, and add monitoring to reschedule it in case of an unexpected error. (remm)
- Refactor parallel deployment threads using the Server executor. (remm)
- Introduce a ConfigurationSource API to standardize access to the core configuration resources of Tomcat. (remm)
- Update the Tomcat embedded API by allowing to set a configuration source, which will allow processing of core configuration. (remm)
- Refactor processing of server.xml, web.xml, context.xml, other configuration files and resources using the ConfigurationSource API. JASPIC persistent providers load and store remains file based. StoreConfig Tomcat configuration files storing remains file based at their previous default locations. (remm)
- 62897: Provide a property (`clearReferencesThreadLocals`) on the standard `Context` implementation that enables the check for memory leaks via `ThreadLocal`s to be disabled because this check depends on the use of an API that has been deprecated in later versions of Java. (markt)
- Fix more storeconfig issues with duplicated SSL attributes. (remm)
- 62924: Fix file descriptor leak introduced in the code that monitors `tomcat-users.xml` for modifications. (markt)
- Add periodic event notification for lifecycle listeners configured on the Server. (remm)
- 62968: Avoid unnecessary (and relatively expensive) `getResources()` call in the Mapper when processing rule 7. (markt)
- Update the recommended minimum Tomcat Native version to 1.2.19. (markt)
- 62978: Update the RemoteIpValve to handle multiple values in the `x-forwarded-proto` header. Patch provided by Tom Groot. (markt)
- Update the RemoteIpFilter to handle multiple values in the `x-forwarded-proto` header. Based on a patch provided by Tom Groot. (markt)
- 62986: Refactor the code that performs class scanning during web application start to make integration simpler for downstream users. Patch provided by rmannibucau. (markt)
- Filter out tomcat-web.xml from the watched resources list in storeconfig. (remm)
- 62988: Fix the `LoadBalancerDrainingValve` so it works when the session cookie configuration is not explicitly declared. Based on a patch provided by Andreas Kurth. (markt)

#### Coyote

- Refactor connector async timeout threads using a scheduled executor. (remm)
- Avoid using a dedicated thread for accept on the NIO2 connector, it is always less efficient. (remm)
- Load SSL configuration resources for JSSE using the ConfigurationSource API. OpenSSL use requires actual files. (remm)
- 62899: Prevent the incorrect timing out of connections when Servlet non-blocking I/O is used to read a request body over an HTTP/2 stream. (markt)
- Avoid bad SSLHostConfig JMX registrations before init. (remm)
- Avoid a potential hang when a client connects using TLS 1.0 to a Tomcat HTTPS connector configured to use NIO or NIO2 with OpenSSL 1.1.1 or later. (markt)

#### Jasper

- Update the Eclipse Compiler for Java to 4.9. Additional patch by Lukasz Jader. (markt)
- 53737: Extend JspC, the precompilation tool, to include support for resource JARs. (markt)
- 62976: Avoid an `IllegalStateException` when using background compilation when tag files are packaged in JAR files. (markt)

#### Web applications

- 53553: Add the ability to specify a context.xml from the server to use when uploading a web application for deployment with the Manager web application. Patch provided by Anton Lindström. (markt)
- 62918: Filter out subtype mbeans to avoid breaking the connector status page. (remm)
- Unify letter case of the word 'How-To' in the webapps (csutherl)

#### Tribes

- Refactor various operations performed in tribes using a scheduled executor. When tribes is not running standalone, it will use the executor from the Catalina Server. If running independently, the Channel will provide the executor. (remm)
- Make EncryptInterceptor thread-safe. This makes this interceptor actually usable. (schultz/markt)
- Add support for GCM mode to EncryptInterceptor. (schultz)

#### Other

- Prevent an error when running in a Cygwin shell and the `JAVA_ENDORSED_DIRS` system property is empty. Patch provided by Zemian Deng. (markt)
- Expand the coverage and quality of the French translations provided with Apache Tomcat. Includes contributions from remm, soliplaya, Ludovic Pénet, David, NicolasG and bdelacretaz. (markt)
- Add Simplified Chinese translations to the translations to Apache Tomcat. Includes contributions from Darren Luo, syseal, Winsonzhao, 袁宇杰, Lanranzi, ZhangJieWen, Jerry, yinzhili001, 安柏诚, shawn, lavender, Zheng Feng, zengwc, RichardHo, mm, gingshi huang, Bob, geekwang, zheng, Deanzhg, Tianfengjingjing, Panblack, oking, Dave Newman, Cnfnss, Jim Ma, 852394875, huxing and Greenman0007. (markt)
- Add Korean translations to Apache Tomcat. Includes contributions from woonsan, JunSang Park, song choe and OhChan. (markt)
- Expand the coverage and quality of the Spanish translations provided with Apache Tomcat. Includes contributions from Ulises Gonzalez Horta, Israel, Eduardo Quintanilla and Miguel suarez. (markt)
- Expand the coverage and quality of the Russian translations provided with Apache Tomcat. Includes contributions from solomax, Rafael Sachakov and Andrei Maiseyenka. (markt)
- Expand the coverage and quality of the German translations provided with Apache Tomcat. Includes contributions from Matk80, burghard, Daniel Wehringer and Felix Schumacher. (markt)
- Expand the coverage and quality of the Japanese translations provided with Apache Tomcat. Includes contributions from Yujiorama, motohashi.yuki and kfujino. (markt)
- Add Brazilian Portuguese translations to Apache Tomcat. Includes contributions from geraldo netto. (markt)
- Include Brazilian Portuguese translations in the standard Tomcat distribution. (markt)
- Include Simplified Chinese translations in the standard Tomcat distribution. (markt)
- Include Korean translations in the standard Tomcat distribution. (markt)
- Add a packaging method for Tomcat using Maven, as well as a container build file for it. (remm)
- Add XML Namespace to the project element of all POM files so that the XML files are Well Formed and Valid. (csutherl)
- 53930: Add support for the `CATALINA_OUT_CMD` environment variable that defines a command to which captured stdout and stderr will be redirected. Patch provided by Casey Lucas. (markt)
- Update the packaged version of the Tomcat Native Library to 1.2.19 to pick up the latest Windows binaries built with APR 1.6.5 and OpenSSL 1.1.1a. (markt)
- Add i18n to many strings that lacked it. (remm)

### 2018-11-07 Tomcat 9.0.13 (markt)

#### Catalina

- 58590: Add the ability for a UserDatabase to monitor the backing XML file for changes and reload the source file if a change in the last modified time is detected. This is enabled by default meaning that changes to `$CATALINA_BASE/conf/tomcat-users.xml` will now take effect a short time after the file is saved. (markt)
- 61171: Add the `portOffset` attribute to the `Server` element which is added to the configured shutdown and `Connector` ports. Based on a patch by Marek Czernek. (markt)
- 61692: Add the ability to control which HTTP methods are handled by the CGI Servlet via a new initialization parameter `cgiMethods`. (markt)
- 62687: Expose content length information for resources when using a compressed war. (remm)
- 62737: Fix rewrite substitutions parsing of {} nesting. (remm)
- Add rewrite flags output when getting the rewrite configuration back. (remm)
- Add missing qsdiscard flag to the rewrite flags as a cleaner way to discard the query string. (remm)
- 62755: Add ability to opt out of adding the default web.xml config when embedding Tomcat and adding a context via `addWebapp()`. Call `setAddDefaultWebXmlToWebapp(false)` to prevent the automatic config. (isapir)
- Add documentation about the files `context.xml.default` and `web.xml.default` that can be used to customize `conf/context.xml` and `conf/web.xml` on a per host basis. (fschumacher)
- Ensure that a canonical path is always used for the docBase of a Context to ensure consistent behaviour. (markt)
- 62803: Fix SSL connector configuration processing in storeconfig. (remm)
- 62797: Pass throwable to keep client aborts with status 200 rather than 500. Patch submitted by zikfat. (remm)
- 62802: Restore the `appContextProtection` attribute to the `JreMemoryLeakPreventionListener` as application code may still trigger this memory leak. (markt)
- 62809: Correct a regression in the implementation of DIGEST authentication support for the Deployer Ant tasks (bug 45832) that prevented the `DeployTask` from working when authentication was required. (markt)
- Update the recommended minimum Tomcat Native version to 1.2.18. (markt)
- Ignore an attribute named `source` on `Context` elements provided by `StandardContext`. This is to suppress warnings generated by the Eclipse / Tomcat integration provided by Eclipse. Based on a patch by mdfst13. (markt)
- 62830: Added `JniLifeCycleListener` and static methods `Library.loadLibrary(libraryName)` and `Library.load(filename)` to load a native library by a shared class loader so that more than one Webapp can use it. (isapir)
- Refactor the `Connector` so that the port is obtained from the `Endpoint` rather than a local field that could end up out of sync. (markt)
- Correct a typo in the Spanish resource files. Patch provided by Diego Agulló. (markt)
- 62868: Order the `Enumeration<URL>` provided by `WebappClassLoaderBase.getResources(String)` according to the setting of the delegate flag. (markt)

#### Coyote

- Add TLSv1.3 to the default protocols and to the `all` alias for JSSE based TLS connectors when running on a JVM that supports TLS version 1.3. One such JVM is OpenJDK version 11. (rjung)
- 62685: Correct an error in host name validation parsing that did not allow a fully qualified domain name to terminate with a period. Patch provided by AG. (markt)
- Make PEM file parser a public utility class. (remm)
- 62739: Do not reject requests with an empty HTTP Host header. Such requests are unusual but not invalid. Patch provided by Michael Orr. (markt)
- 62748: Add TLS 1.3 support for the APR/Native connector and the NIO/NIO2 connector when using the OpenSSL backed JSSE implementation. (schultz/markt)
- 62791: Remove an unnecessary check in the NIO TLS implementation that prevented from secure WebSocket connections from being established. (markt)
- Fix server initiated TLS renegotiation to obtain a client certificate when using NIO/NIO2 and the OpenSSL backed JSSE TLS implementation. (markt)
- Ensure open sockets etc. are cleaned up if the socket binding process fails. (markt)
- 62871: Improve MBeans for Endpoint instances (type `ThreadPool` in JMX) by using explicit declaration of attributes and operations rather than relying on introspection. Add a new MBean to expose the `Socketproperties` values. (markt)

#### Jasper

- Correct parsing of XML whitespace in TLD function signatures that incorrectly only looked for the space character. (markt)
- 62674: Correct a regression in the stand-alone JSP compiler utility, `JspC`, caused by the fix for 53492, that caused the JSP compiler to hang. (markt)
- 62721: Correct generation of web.xml header when using JspC. (markt)
- 62757: Correct a regression in the fix for 62603 that caused `NullPointerException`s when compiling tag files on first access when development mode was disabled and background compilation was enabled. Based on a patch by Jordi Llach. (markt)

#### WebSocket

- 62731: Make the URI returned by `HandshakeRequest.getRequestURI()` and `Session.getRequestURI()` absolute so that the scheme, host and port are accessible. (markt)

#### Web applications

- 62676: Expand the CORS filter documentation to make it clear that explicit configuration is required to enable support for cross-origin requests. (markt)
- 62712: Correct NPE in Manager application when attempting to view configured certificates for an APR/native TLS connector. (markt)
- 62761: Correct the advanced CORS example in the Filter documentation to use a valid configuration. (markt)
- 62786: Add a note to the Context documentation to explain that, by default, settings for a Context element defined in server.xml will be overwritten by settings specified in a default context file such as `conf/context.xml`. (markt)
- Create a little visual separation between the Undeploy button and the other buttons in the Manager application. Patch provided by Łukasz Jąder. (markt)

#### Tribes

- Add `setMembershipService` method to the `MembershipProvider`. (kfujino)
- Experimental Kubernetes aware cloud membership provider, based on code by Maxime Beck. Contains code derived from jgroups. (remm/kfujino)
- Move the event notification `ThreadPoolExecutor` to `MembershipProviderBase`. (kfujino)
- Even if all members have already disappeared and PING can not be sent, ensure that members will be expired. (kfujino)
- Ensure that remove the member from suspect list when member added. (kfujino)
- Add EncryptInterceptor to the portfolio of available clustering interceptors. This adds symmetric encryption of session data to Tomcat clustering regardless of the type of cluster manager or membership being used. (schultz)

#### Other

- Port DBCP transaction synchronization registry fix (commit d49d45e). (remm)
- Update the internal fork of Apache Commons Pool 2 to d4e0e88 (2018-09-12) to pick up some bug fixes and enhancements. (markt)
- 62705: Added a fail fast check for minimum required Apache Ant version 1.9.8 when building Tomcat. (isapir)
- Added ant target ide-intellij to create an IntelliJ IDEA project. (isapir)
- Utility JSON parser generated from a public domain javacc grammar written by Robert Fischer. (remm)
- Update the packaged version of the Tomcat Native Library to 1.2.18 to pick up the latest Windows binaries built with APR 1.6.5 and OpenSSL 1.1.1. (markt)

### 2018-09-10 Tomcat 9.0.12 (markt)

#### Catalina

- Improve the handling of path parameters when working with RequestDispatcher objects. (markt)
- 62664: Process requests with content type `multipart/form-data` to servlets with a `@MultipartConfig` annotation regardless of HTTP method. (markt)
- 62667: Add recursion to rewrite substitution parsing. (remm)
- 62669: When using the SSIFilter and a resource does not specify a content type, do not force the content type to `application/x-octet-stream`. (markt)
- 62670: Adjust the memory leak protection for the `DriverManager` so that JDBC drivers located in `$CATALINA_HOME/lib` and `$CATALINA_BASE/lib` are loaded via the service loader mechanism when the protection is enabled. (markt)
- When generating a redirect to a directory in the Default Servlet, avoid generating a protocol relative redirect. (markt)

#### Coyote

- Fix potential deadlocks when using asynchronous Servlet processing with HTTP/2 connectors. (markt)
- 62620: Fix corruption of response bodies when writing large bodies using asynchronous processing over HTTP/2. (markt)
- 62628: Additional fixes for output corruption of response bodies when writing large bodies using asynchronous processing over HTTP/2. (markt)
- Support for Netware in the `org.apache.tomcat.jni` package has been removed as there has not been a supported Netware platform for a number of years. (markt)

#### Jasper

- Correct the JSP version in the X-PoweredBy HTTP header generated when the xpoweredBy option is enabled. (markt)
- 62662: Fix the corruption of web.xml output during JSP compilation caused by the fix for 53492. Patch provided by Bernhard Frauendienst. (markt)

#### Web applications

- Expand the information in the documentation web application regarding the use of `CATALINA_HOME` and `CATALINA_BASE`. Patch provided by Marek Czernek. (markt)
- 62652: Make it clearer that the version of DBCP that is packaged in Tomcat 9.0.x is DBCP 2. Correct the names of some DBCP 2 configuration attributes that changed between 1.x and 2.x. (markt)
- 62666: Expand internationalisation support in the Manager application to include the server status page and provide Russian translations in addition to English. Patch provided by Artem Chebykin. (markt)

#### Other

- Switch the build script to use http for downloads from an ASF mirror using the closer.lua script to avoid failures due to HTTPS to HTTP redirects. (rjung)

### 2018-08-17 Tomcat 9.0.11 (markt)

#### Catalina

- Make the `isLocked()` method of the `LockOutRealm` public and expose the method via JMX. (markt)
- 53387: Add support for regular expression capture groups to the SSI servlet and filter. (markt)
- 53411: Improve the handling of HTTP requests that do not explicitly specify a host name when no default host is configured. Also improve the tracking of changes to the default host as hosts are added and removed while Tomcat is running. (markt)
- Ensure that the HTTP Vary header is set correctly when using the CORS filter and improve the cacheability of requests that pass through the COPRS filter. (markt)
- 62527: Revert restriction of JNDI to the `java:` namespace. (remm)
- Introduce a new class - `MultiThrowable` - to report exceptions when multiple actions are taken where each action may throw an exception but all actions are taken before any errors are reported. Use this new class when reporting multiple container (e.g. web application) failures during start. (markt)
- Correctly decode URL paths (`+` should not be decoded to a space in the path) in the `RequestDispatcher` and the web application class loader. (markt)
- Make logout more robust if JASPIC subject is unexpectedly unavailable. (markt)
- 62547: JASPIC `cleanSubject()` was not called on logout when the authenticator was configured to cache the authenticated Principal. Patch provided by Guillermo González de Agüero. (markt)
- 62559: Add `jaxb-*.jar` to the list of JARs ignored by `StandardJarScanner`. (markt)
- 62560: Add `oraclepki.jar` to the list of JARs ignored by `StandardJarScanner`. (markt)
- 62607: Return a non-zero exit code from `catalina.[bat|sh] run` if Tomcat fails to start. (markt)
- Use short circuit logic to prevent potential NPE in CorsFilter. (fschumacher)
- Simplify construction of appName from container name in JAASRealm. (fschumacher)
- Remove `ServletException` from declaration of `Tomcat.addWebapp(String,String)` since it is never thrown. Patch provided by Tzafrir. (markt)

#### Coyote

- Refactor HTTP date creation and parsing to reduce code duplication, reduce the use of ThreadLocals and to increase the use of caching. (markt)
- 56676: Add a default location for the native library, as ${catalina.home}/bin, which the testsuite already uses. (remm)
- 60560: Add support for using an inherited channel to the NIO connector. Based on a patch submitted by Thomas Meyer with testing and suggestions by Coty Sutherland. (remm)
- 62507: Ensure that JSSE based TLS connectors work correctly with a DKS keystore. (markt)
- Refactor code that adds an additional header name to the `Vary` HTTP response header to use a common utility method that addresses several additional edge cases. (markt)
- 62515: When a connector is configured (via setting `bindOnInit` to `false`) to bind/unbind the server socket during start/stop, close the socket earlier in the stop process so new connections do not sit in the TCP backlog during the shutdown process only to be dropped as stop completes. In this scenario new connections will now be refused immediately. (markt)
- 62526: Correctly handle PKCS12 format key stores when the key store password is configured to be the empty string. (markt)
- 62605: Ensure `ReadListener.onDataAvailable()` is called when the initial request body data arrives after the request headers when using asynchronous processing over HTTP/2. (markt)
- 62614: Ensure that `WriteListener.onWritePossible()` is called after `isReady()` returns `false` and the window size is subsequently incremented when using asynchronous processing over HTTP/2. (markt)

#### Jasper

- 53492: Make the Java file generation process multi-threaded. By default, one thread will be used per core. Based on a patch by Dan Fabulich. (markt)
- 62453: Add a performance optimisation for using expressions in tags that depend on uninitialised tag attributes with implied scope. Generally, using an explicit scope with tag attributes in EL is the best way to avoid various potential performance issues. (markt)
- Correctly decode URL paths (`+` should not be decoded to a space in the path) in the Jasper class loader. (markt)
- 62603: Fix a potential race condition when development mode is disabled and background compilation checks are enabled. It was possible that some updates would not take effect and/or `ClassNotFoundException`s would occur. (markt)

#### WebSocket

- 62596: Remove the limit on the size of the initial HTTP upgrade request used to establish the web socket connection. (markt)

#### Web applications

- 62558: Add Russian translations for the Manager and Host Manager web applications. Based on a patch by Ivan Krasnov. (markt)
- Add documents for Static Membership service. (kfujino)
- 62561: Add advanced class loader configuration information regarding the use of the Server and Shared class loaders to the documentation web application. (markt)

#### Tribes

- Ensures that the specified `rxBufSize` is correctly set to receiver buffer size. (kfujino)
- Correct the stop order of the Channel components. It stops in the reverse order to that at startup. (kfujino)
- Added new StaticMembership implementation. This implementation does not require any additional configuration of other `ChannelInterceptors`. It works only with membership service. (kfujino)

#### Other

- Support building with Java 9+ while preserving the Java 8 compatibility at runtime (requires Ant 1.9.8 or later). (ebourg)
- Update WSDL4J library to version 1.6.3 (from 1.6.2). (kkolinko)
- Update JUnit library to version 4.12 (from 4.11). (kkolinko)
- Downgrade CGLib library used for testing with EasyMock to version 2.2.2 (from 2.2.3) as version 2.2.3 is not available from Maven Central. (markt)
- Implement checksum checks when downloading dependencies that are used to build Tomcat. (kkolinko)
- Fixed spelling. Patch provided by Jimmy Casey via GitHub. (violetagg)
- Update the internal fork of Apache Commons Pool 2 to 3e02523 (2018-08-09) to pick up some bug fixes and enhancements. (markt)
- Update the internal fork of Apache Commons DBCP 2 to abc0484 (2018-08-09) to pick up some bug fixes and enhancements. (markt)
- Correct various spelling errors throughout the source code and documentation. Patch provided by Kazuhiro Sera. (markt)

### 2018-06-25 Tomcat 9.0.10 (markt)

#### Catalina

- 62476: Use GMT timezone for the value of `Expires` header as required by HTTP specification (RFC 7231, 7234). (kkolinko)

### not released Tomcat 9.0.9 (markt)

#### Catalina

- Treat the `<mapped-name>` element of a `<env-entry>` in web.xml in the same way as the `mappedName` element of the equivalent `@Resource` annotation. Both now attempt to set the `mappedName` property of the resource. (markt)
- Correct the processing of resources with `<injection-target>`s defined in web.xml. First look for a match using JavaBean property names and then, only if a match is not found, look for a match using fields. (markt)
- When restoring a saved request with a request body after FORM authentication, ensure that calls to the `HttpServletRequest` methods `getRequestURI()`, `getQueryString()` and `getProtocol()` are not corrupted by the processing of the saved request body. (markt)
- JNDI resources that are defined with injection targets but no value are now treated as if the resource is not defined. (markt)
- Ensure that JNDI names used for `<lookup-name>` entries in web.xml and for `lookup` elements of `@Resource` annotations specify a name with an explicit `java:` namespace. (markt)
- 50019: Add support for `<lookup-name>`. Based on a patch by Gurkan Erdogdu. (markt)
- Add the `AuthenticatedUserRealm` for use with CLIENT-CERT and SPNEGO when just the authenticated user name is required. (markt)
- 50175: Add a new attribute to the standard context implementation, `skipMemoryLeakChecksOnJvmShutdown`, that allows the user to configure Tomcat to skip the memory leak checks usually performed during web application stop if that stop is triggered by a JVM shutdown. (markt)
- 51497: Add an option, `ipv6Canonical`, to the `AccessLogValve` that causes IPv6 addresses to be output in canonical form defined by RFC 5952. (ognjen/markt)
- 51953: Add the `RemoteCIDRFilter` and `RemoteCIDRValve` that can be used to allow/deny requests based on IPv4 and/or IPv6 client address where the IP ranges are defined using CIDR notation. Based on a patch by Francis Galiegue. (markt)
- 62343: Make CORS filter defaults more secure. This is the fix for CVE-2018-8014. (markt)
- Ensure that the web application resources implementation does not incorrectly cache results for resources that are only visible as class loader resources. (markt)
- 62387: Do not log a warning message if the file based persistent session store fails to delete the file for a session when the session is invalidated because the file has not been created yet. (markt)
- Make all loggers associated with Tomcat provided Filters non-static to ensure that log messages are not lost when a web application is reloaded. (markt)
- Correct the manifest for the annotations-api.jar. The JAR implements the Common Annotations API 1.3 and the manifest should reflect that. (markt)
- Switch to non-static loggers where there is a possibility of a logger becoming associated with a web application class loader causing log messages to be lost if the web application is stopped. (markt)
- 62389: Add the IPv6 loopback address to the default `internalProxies` regular expression. Patch by Craig Andrews. (markt)
- In the `RemoteIpValve` and `RemoteIpFilter`, correctly handle the case when the request passes through one or more `trustedProxies` but no `internalProxies`. Based on a patch by zhanhb. (markt)
- Correct the logic in `MBeanFactory.removeConnector()` to ensure that the correct Connector is removed when there are multiple Connectors using different addresses but the same port. (markt)
- Make `JAASRealm` mis-configuration more obvious by requiring the authenticated Subject to include at least one Principal of a type specified by `userClassNames`. (markt)

#### Coyote

- Correct a regression in the error page handling that prevented error pages from issuing redirects or taking other action that required the response status code to be changed. (markt)
- Consistent exception propagation for NIO2 SSL close. (remm)
- Followup sync fix for NIO2 async IO blocking read/writes. (remm)
- Log an error message if the AJP connector detects that the reverse proxy is sending AJP messages that are too large for the configured `packetSize`. (markt)
- Relax Host validation by removing the requirement that the final component of a FQDN must be alphabetic. (markt)
- 62371: Improve logging of Host validation failures. (markt)
- Fix a couple of unlikely edge cases in the shutting down of the APR/native connector. (markt)
- Add missing handshake timeout for NIO2. (remm)
- Correctly handle a digest authorization header when the user name contains an escaped character. (markt)
- Correctly handle a digest authorization header when one of the hex field values ends the header with in an invalid character. (markt)
- Correctly handle an invalid quality value in an `Accept-Language` header. (markt)
- 62423: Fix SSL docs CRL attribute typo. (remm)
- Improve IPv6 validation by ensuring that IPv4-Mapped IPv6 addresses do not contain leading zeros in the IPv4 part. Based on a patch by Katya Stoycheva. (markt)
- Fix `NullPointerException` thrown from `replaceSystemProperties()` when trying to log messages. (csutherl)
- Avoid unnecessary processing of async timeouts. (markt)

#### Jasper

- 50234: Add the capability to generate a web-fragment.xml file to JspC. (markt)
- 62080: Ensure that all reads of the current thread's context class loader made by the UEL API and implementation are performed via a `PrivilegedAction` to ensure that a `SecurityException` is not triggered when running under a `SecurityManager`. (mark)
- 62350: Refactor `org.apache.jasper.runtime.BodyContentImpl` so a `SecurityException` is not thrown when running under a SecurityManger and additional permissions are not required in the `catalina.policy` file. This is a follow-up to the fix for 43925. (kkolinko/markt)
- Enable JspC from Tomcat 9 to work with Maven JspC compiler plug-ins written for Tomcat 8.5.x. Patch provided by Pavel Cibulka. (markt)
- Update web.xml, web-fragment.xml and web.xml extracts generated by JspC to use the Servlet 4.0 version of the relevant schemas. (markt)

#### Cluster

- Remove duplicate calls when creating a replicated session to reduce the time taken to create the session and thereby reduce the chances of a subsequent session update message being ignored because the session does not yet exist. (markt)
- Add the method to send a message with a specified sendOptions. (kfujino)
- When sending the `GET_ALL_SESSIONS` message, make sure that sends with asynchronous option in order to avoid ack timeout. Waiting to receive the `ALL_SESSION_DATA` message should be done with `waitForSendAllSessions` instead of ACK. (kfujino)

#### WebSocket

- Use NIO2 API for websockets writes. (remm)
- When decoding of path parameter failed, make sure to throw `DecodeException` instead of throwing `ArrayIndexOutOfBoundsException`. (kfujino)
- Improve the handling of exceptions during TLS handshakes for the WebSocket client. (markt)
- Enable host name verification when using TLS with the WebSocket client. (markt)

#### Web applications

- 62395: Clarify the meaning of the connector attribute `minSpareThreads` in the documentation web application. (markt)
- Correct the documentation for the `allowHostHeaderMismatch` attribute of the standard HTTP Connector implementations. (markt)

#### Tribes

- Ensure that the correct default value is returned when retrieve unset properties in `McastService`. (kfujino)
- Make `MembershipService` more easily extensible. (kfujino)

#### jdbc-pool

- When `logValidationErrors` is set to true, the connection validation error is logged as `SEVERE` instead of `WARNING`. (kfujino)

#### Other

- Ensure that Apache Tomcat may be built from source with Java 11. (markt)
- 52381: Add OSGi metadata to JAR files. (markt)
- 62391: Remove references to `javaw.exe` as this file is not required by Tomcat and the references prevent the use of the Server JRE. (markt)
- Update the packaged version of the Tomcat Native Library to 1.2.17 to pick up the latest Windows binaries built with APR 1.6.3 and OpenSSL 1.0.2o. (markt)
- 62458: Update the internal fork of Commons Pool 2 to dfef97b (2018-06-18) to pick up some bug fixes and enhancements. (markt)
- Update the internal fork of Commons DBCP 2 to 2.4.0. (markt)

### 2018-05-03 Tomcat 9.0.8 (markt)

#### Catalina

- 62263: Avoid a `NullPointerException` when the `RemoteIpValve` processes a request for which no Context can be found. (markt)
- 62258: Don't trigger the standard error page mechanism when the error has caused the connection to the client to be closed as no-one will ever see the error page. (markt)
- Register MBean when DataSource Resource `type="javax.sql.XADataSource"`. Patch provided by Masafumi Miura. (csutherl)
- Fix a rare edge case that is unlikely to occur in real usage. This edge case meant that writing long streams of UTF-8 characters to the HTTP response that consisted almost entirely of surrogate pairs could result in one surrogate pair being dropped. (markt)
- Update the internal fork of Apache Commons BCEL to r1829827 to add early access Java 11 support to the annotation scanning code. (markt)
- 62297: Enable the `CrawlerSessionManagerValve` to correctly handle bots that crawl multiple hosts and/or web applications when the Valve is configured on a Host or an Engine. (fschumacher)
- 62309: Fix a `SecurityException` when using JASPIC under a `SecurityManager` when authentication is not mandatory. (markt)
- 62329: Correctly list resources in JAR files when directories do not have dedicated entries. Patch provided by Meelis Müür. (markt)
- Collapse multiple leading `/` characters to a single `/` in the return value of `HttpServletRequest#getContextPath()` to avoid issues if the value is used with `HttpServletResponse#sendRedirect()`. This behaviour is enabled by default and configurable via the new Context attribute `allowMultipleLeadingForwardSlashInPath`. (markt)
- Improve handling of overflow in the UTF-8 decoder with supplementary characters. (markt)

#### Coyote

- Correct off-by-one error in thread pool that allowed thread pools to increase in size to one more than the configured limit. Patch provided by usc. (markt)
- Prevent unexpected TLS handshake failures caused by errors during a previous handshake that were not correctly cleaned-up when using the NIO or NIO2 connector with the `OpenSSLImplementation`. (markt)
- 62273: Implement configuration options to work-around specification non-compliant user agents (including all the major browsers) that do not correctly %nn encode URI paths and query strings as required by RFC 7230 and RFC 3986. (markt)
- Fix sync for NIO2 async IO blocking read/writes. (remm)

#### Jasper

- Update the Eclipse Compiler for Java to 4.7.3a. (markt)
- Allow `9` to be used to specify Java 9 as the compiler source and/or compiler target for JSP compilation. The Early Access value of `1.9` is still supported. (markt)
- Add support for specifying Java 10 (with the value `10`) as the compiler source and/or compiler target for JSP compilation. (markt)
- 62287: Do not rely on hash codes to test instances of `ValueExpressionImpl` for equality. Patch provided by Mark Struberg. (markt)

#### WebSocket

- 62301: Correct a regression in the fix for 61491 that didn't correctly handle a final empty message part in all circumstances when using `PerMessageDeflate`. (markt)
- 62332: Ensure WebSocket connections are closed after an I/O error is experienced reading from the client. (markt)

#### Other

- Avoid warning when running under Cygwin when the `JAVA_ENDORSED_DIRS` environment variable is not set. Patch provided by Zemian Deng. (markt)

### 2018-04-07 Tomcat 9.0.7 (markt)

#### Catalina

- 51195: Avoid a false positive report of a web application memory leak by clearing `ObjectStreamClass$Caches` of classes loaded by the web application when the web application is stopped. (markt)
- 52688: Add support for the `maxDays` attribute to the `AccessLogValve` and `ExtendedAccessLogValve`. This allows the maximum number of days for which rotated access logs should be retained before deletion to be defined. (markt)
- Ensure the MBean names for the `SSLHostConfig` and `SSLHostConfigCertificate` are correctly formed when the `Connector` is bound to a specific IP address. (markt)
- 62168: When using the `PersistentManager` honor a value of `-1` for `minIdleSwap` and do not swap out sessions to keep the number of active sessions under `maxActive`. Patch provided by Holger Sunke. (markt)
- 62172: Improve Javadoc for `org.apache.catalina.startup.Constants` and ensure that the constants are correctly used. (markt)
- 62175: Avoid infinite recursion, when trying to validate a session while loading it with `PersistentManager`. (fschumacher)
- Ensure that `NamingContextListener` instances are only notified once of property changes on the associated naming resources. (markt)
- 62224: Disable the `forkJoinCommonPoolProtection` of the `JreMemoryLeakPreventionListener` when running on Java 9 and above since the underlying JRE bug has been fixed. (markt)

#### Coyote

- Avoid potential loop in APR/Native poller. (markt)
- Ensure streams that are received but not processed are excluded from the tracking of maximum ID of processed streams. (markt)
- Refactor the check for a paused connector to consistently prevent new streams from being created after the connector has been paused. (markt)
- Improve debug logging for HTTP/2 pushed streams. (markt)
- The OpenSSL engine SSL session will now ignore invalid accesses. (remm)
- 62177: Correct two protocol errors with HTTP/2 `PUSH_PROMISE` frames. Firstly, the HTTP/2 protocol only permits pushes to be sent on peer initiated requests. Secondly, pushes must be sent in order of increasing stream ID. These restriction were not being enforced leading to protocol errors at the client. (markt)

#### Web applications

- Add document for `FragmentationInterceptor`. (kfujino)
- Document how the roles for an authenticated user are determined when the `CombinedRealm` is used. (markt)
- 62163: Correct the Tomcat Setup documentation that incorrectly referred to Java 7 as the minimum version rather than Java 8. (markt)

#### Tribes

- Add JMX support for `FragmentationInterceptor` in order to prevent warning of startup. (kfujino)

#### jdbc-pool

- Ensure that `SQLWarning` has been cleared when connection returns to the pool. (kfujino)
- Enable clearing of `SQLWarning` via JMX. (kfujino)
- Ensure that parameters have been cleared when `PreparedStatement` and/or `CallableStatement` are cached. (kfujino)
- Enable PoolCleaner to be started even if `validationQuery` is not set. (kfujino)

#### Other

- Update the build script so MD5 hashes are no longer generated for releases as per the change in the ASF distribution policy. (markt)
- 62164: Switch the build script to use TLS for downloads from SourceForge and Maven Central to avoid failures due to HTTP to HTTPS redirects. (markt)
- Always report the OS's umask when launching the JVM. (schultz)
- Add managed connections package to the package renamed DBCP 2 to provide a complete DBCP 2 in Tomcat. (remm)

### 2018-03-08 Tomcat 9.0.6 (markt)

#### Catalina

- 43866: Add additional attributes to the Manager to provide control over which listeners are called when an attribute is added to the session when it has already been added under the same name. This is to aid clustering scenarios where `setAttribute()` is often called to signal that the attribute value has been mutated and needs to be replicated but it may not be required, or even desired, for the associated listeners to be triggered. The default behaviour has not been changed. (markt)
- Minor optimization when calling class transformers. (rjung)
- Pass errors triggered by invalid requests or unavailable services to the application provided error handling and/or the container provided error handling (`ErrorReportValve`) as appropriate. (markt)
- 41007: Add the ability to specify static HTML responses for specific error codes and/or exception types with the `ErrorReportValve`. (markt)
- Prevent Tomcat from applying gzip compression to content that is already compressed with brotli compression. Based on a patch provided by burka. (markt)
- 62090: Null container names are not allowed. (remm)
- 62104: Fix programmatic login regression as the NonLoginAuthenticator has to be set for it to work (if no login method is specified). (remm)
- 62117: Improve error message in `catalina.sh` when calling `kill -0 <pid>` fails. Based on a suggestion from Mark Morschhaeuser. (markt)
- 62118: Correctly create a JNDI `ServiceRef` using the specified interface rather than the concrete type. Based on a suggestion by Ángel Álvarez Páscua. (markt)
- Fix for `RequestDumperFilter` log attribute. Patch provided by Kirill Romanov via Github. (violetagg)
- 62123: Avoid `ConcurrentModificationException` when attempting to clean up application triggered RMI memory leaks on web application stop. (markt)
- When a deployment descriptor is deployed that includes a `path` attribute, log a warning that the `path` attribute will be ignored. (markt)
- When a deployment descriptor is deployed that references an external `docBase` and, as a result, a `docBase` under the `appBase` will be ignored, log a warning. (markt)
- Correct a regression in the fix for 60276 that meant that compression was applied to all MIME types. Patch provided by Stefan Knoblich. (markt)

#### Coyote

- Add async HTTP/2 parser for NIO2. (remm)
- Add minor HPACK fixes, based on fixes by Stuart Douglas. (remm)
- 61751: Follow up fix so that OpenSSL engine returns underflow when unwrapping if no bytes were produced and the input is empty. (remm)
- Minor OpenSSL engine cleanups. (remm)
- NIO SSL handshake should throw an exception on overflow status, like NIO2 SSL. (remm)

#### Web applications

- 47467: When deploying a web application via the manager application and a path is not explicitly specified, derive it from the provided deployment descriptor or, if that is not present, the WAR or DIR. (markt)
- 48672: Add documentation for the Host Manager web application. Patch provided by Marek Czernek. (markt)
- Add support for specifying the application version when deploying an application via the Manager application HTML interface. (markt)
- Work-around a known, non-specification compliant behaviour in some versions of IE that can allow XSS when the Manager application generates a plain text response. Based on a suggestion from Muthukumar Marikani. (markt)

### 2018-02-11 Tomcat 9.0.5 (markt)

#### Catalina

- Prevent a stack trace being written to standard out when running on Java 10 due to changes in the `LogManager` implementation. (markt)
- Avoid duplicate load attempts if one has been made already. (remm)
- Avoid NPE in ThreadLocalLeakPreventionListener if there is no Engine. (remm)
- 62000: When a JNDI reference cannot be resolved, ensure that the root cause exception is reported rather than swallowed. (markt)
- 62036: When caching an authenticated user Principal in the session when the web application is configured with the `NonLoginAuthenticator`, cache the internal Principal object rather than the user facing Principal object as Tomcat requires the internal object to correctly process later authorization checks. (markt)
- Refactor error handling to enable errors that occur before processing is passed to the application to be handled by the application provided error handling and/or the container provided error handling (`ErrorReportValve`) as appropriate. (markt)
- Pass 404 errors triggered by a missing ROOT web application to the container error handling to generate the response body. (markt)
- Pass 400 errors triggered by invalid request targets to the container error handling to generate the response body. (markt)
- Provide a correct `Allow` header when responding to an HTTP `TRACE` request for a JSP with a 405 status code. (markt)
- When using Tomcat embedded, only perform Authenticator configuration once during web application start. (markt)
- 62067: Correctly apply security constraints mapped to the context root using a URL pattern of `""`. (markt)
- Process all `ServletSecurity` annotations at web application start rather than at servlet load time to ensure constraints are applied consistently. (markt)

#### Coyote

- 61751: Fix truncated request input streams when using NIO2 with TLS. (markt)
- 62023: Log error reporting multiple SSLHostConfig elements when using the APR Connector instead of crashing Tomcat. (csutherl)
- 62032: Fix NullPointerException when certificateFile is not defined on an SSLHostConfig and unify the behavior when a certificateFile is defined but the file does not exist for both JKS and PEM file types. (csutherl)
- Ensure that the `toString()` method behaves consistently for `ByteChunk` and `CharChunk` and that `null` is returned when `toString()` is called both on newly created objects and immediately after a call to `recycle()`. This should not impact typical Tomcat users. It may impact users who use these classes directly in their own code. (markt)
- Ensure that the `toString()`, `toBytes()` and `toChars()` methods of `MessageBytes` behave consistently and do not throw a `NullPointerException` both on newly created objects and immediately after a call to `recycle()`. This should not impact typical Tomcat users. It may impact users who use these classes directly in their own code. (markt)
- When processing an HTTP 1.0 request in the HTTP connector and no host information is provided in the request, obtain the server port from the local port rather than the connector configuration since the configured value maybe zero. (markt)
- Enable strict validation of the provided host name and port for all connectors. Requests with invalid host names and/or ports will be rejected with a 400 response. (markt)
- Update the host validation to permit host names and components of domain names (excluding top-level domains) to start with a number and to ensure that top-level domains are fully alphabetic. (markt)
- 62053: Fix NPE when writing push headers with HTTP/2 NIO2. Patch submitted by Holger Sunke. (remm)

#### Jasper

- Include an HTTP `Allow` header when a JSP generates a 405 response due to a request with an unsupported method. (markt)
- Add support for the HTTP `OPTION` method to JSPs. The JSP specification explicitly states that the behaviour for this method is undefined for JSPs so this is a Tomcat specific behaviour. (markt)

#### WebSocket

- 62024: When closing a connection with an abnormal close, close the socket immediately rather than waiting for a close message from the client that may never arrive. (markt)

#### Webapps

- 62049: Fix missing class from manager 404 JSP error page. (remm)

#### jdbc-pool

- Enhance the JMX support for jdbc-pool in order to expose `PooledConnection` and `JdbcInterceptors`. (kfujino)
- Add MBean for `PooledConnection`. (kfujino)
- 62011: Add MBean for `StatementCache`. (kfujino)
- Expose the cache size for each connection via JMX in `StatementCache`. (kfujino)
- Add MBean for `ResetAbandonedTimer`. (kfujino)

#### Other

- Update the list with the public interfaces in the RELEASE-NOTES. (violetagg)
- Update the NSIS Installer used to build the Windows installer to version 3.03. (kkolinko)

### 2018-01-22 Tomcat 9.0.4 (markt)

#### Catalina

- Correct a regression in the previous fix for 61916 that meant that any call to `addHeader()` would have been replaced with a call to `setHeader()` for all requests mapped to the `AddDefaultCharsetFilter`. (markt)
- 61999: maxSavePostSize set to 0 should disable saving POST data during authentication. (remm)

#### Coyote

- Fix NIO2 HTTP/2 sendfile. (remm)
- 61993: Improve handling for `ByteChunk` and `CharChunk` instances that grow close to the maximum size allowed by the JRE. (markt)

#### Jasper

- 43925: Add a new system property (`org.apache.jasper.runtime.BodyContentImpl.BUFFER_SIZE`) to control the size of the buffer used by Jasper when buffering tag bodies. (markt)

#### Web applications

- 62006: Document the new `JvmOptions9` command line parameter for `tomcat9.exe`. (markt)

### not released Tomcat 9.0.3 (markt)

#### Catalina

- 57619: Implement a small optimisation to how JAR URLs are processed to reduce the storage of duplicate String objects in memory. Patch provided by Dmitri Blinov. (markt)
- Add some missing NPEs to ServletContext. (remm)
- Update the Java EE 8 XML schema to the released versions. (markt)
- Minor HTTP/2 push fixes. (remm)
- 61916: Extend the `AddDefaultCharsetFilter` to add a character set when the content type is set via `setHeader()` or `addHeader()` as well as when it is set via `setContentType()`. (markt)
- When using WebDAV to copy a file resource to a destination that requires a collection to be overwritten, ensure that the operation succeeds rather than fails (with a 500 response). This enables Tomcat to pass two additional tests from the Litmus WebDAV test suite. (markt)
- Modify the Default and WebDAV Servlets so that a 405 status code is returned for `PUT` and `DELETE` requests when disabled via the `readonly` initialisation parameter.
- Align the contents of the `Allow` header with the response code for the Default and WebDAV Servlets. For any given resource a method that returns a 405 status code will not be listed in the `Allow` header and a method listed in the `Allow` header will not return a 405 status code. (markt)

#### Coyote

- 60276: Implement GZIP compression support for responses served over HTTP/2. (markt)
- Do not call onDataAvailable without any data to read. (remm)
- Correctly handle EOF when `ServletInputStream.isReady()` is called. (markt)
- 61886: Log errors on non-container threads at `DEBUG` rather than `INFO`. The exception will be made available to the application via the asynchronous error handling mechanism. (markt)
- 61914: Possible NPE with Java 9 when creating an SSL engine. Patch submitted by Evgenij Ryazanov. (remm)
- 61918: Fix connectionLimitLatch counting when closing an already closed socket. Based on a patch by Ryan Fong. (remm)
- Add support for the OpenSSL ARIA ciphers to the OpenSSL to JSSE cipher mapping. (markt)
- 61932: Allow a call to `AsyncContext.dispatch()` to terminate non-blocking I/O. (markt)
- 61948: Improve the handling of malformed ClientHello messages in the code that extracts the SNI information from a TLS handshake for the JSSE based NIO and NIO2 connectors. (markt)
- Fix NIO2 handshaking with a full input buffer. (remm)
- Return a simple, plain text error message if a client attempts to make a plain text HTTP connection to a TLS enabled NIO or NIO2 Connector. (markt)

#### Jasper

- 61854: When using sets and/or maps in EL expressions, ensure that Jasper correctly parses the expression. Patch provided by Ricardo Martin Camarero. (markt)
- Improve the handling of methods with varargs in EL expressions. In particular, the calling of a varargs method with no parameters now works correctly. Based on a patch by Nitkalya (Ing) Wiriyanuparb. (markt)
- 61945: Fix prototype mode used to compile tags. (remm)

#### Web applications

- 61223: Add the mbeans-descriptors.dtd file to the custom MBean documentation so users have a reference to use when constructing mbeans-descriptors.xml files for custom components. (markt)
- 61565: Add the ability to trigger a reloading of TLS host configuration (certificate and key files, server.xml is not re-parsed) via the Manager web application. (markt)
- 61566: Expose the currently in use certificate chain and list of trusted certificates for all virtual hosts configured using the JSSE style (keystore) TLS configuration via the Manager web application. (markt)
- Partial fix for 61886. Ensure that multiple threads do not attempt to complete the `AsyncContext` if an I/O error occurs in the stock ticker example Servlet. (markt)
- 61886: Prevent `ConcurrentModificationException` when running the asynchronous stock ticker in the examples web application. (markt)
- 61886: Prevent `NullPointerException` and other errors if the stock ticker example is running when the examples web application is stopped. (markt)
- 61910: Clarify the meaning of the `allowLinking` option in the documentation web application. (markt)
- Add OCSP configuration information to the SSL How-To. Patch provided by Marek Czernek. (markt)

#### jdbc-pool

- 61312: Prevent `NullPointerException` when using the statement cache of connection that has been closed. (kfujino)

#### Other

- Add an additional system property for the system property replacement. (remm)
- Add missing SHA-512 hash for release artifacts to the build script. (markt)
- Update the internal fork of Commons Pool 2 to 2.4.3. (markt)
- Update the internal fork of Commons DBCP 2 to 8a71764 (2017-10-18) to pick up some bug fixes and enhancements. (markt)
- Update the internal fork of Commons FileUpload to 6c00d57 (2017-11-23) to pick up some code clean-up. (markt)
- Update the internal fork of Commons Codec to r1817136 to pick up some code clean-up. (markt)
- The native source bundles (for Commons Daemon and Tomcat Native) are no longer copied to the bin directory for the deploy target. They are now only copied to the bin directory for the release target. (markt)

### 2017-11-30 Tomcat 9.0.2 (markt)

#### Catalina

- Fix possible `SecurityException` when using TLS related request attributes. (markt)
- 61597: Extend the `StandardJarScanner` to scan JARs on the module path when running on Java 9 and class path scanning is enabled. (markt)
- 61601: Add support for multi-release JARs in JAR scanning and web application class loading. (markt)
- 61681: Allow HTTP/2 push when using request wrapping. (remm)
- Provide the `SessionInitializerFilter` that can be used to ensure that an HTTP session exists when initiating a WebSocket connection. Patch provided by isapir. (markt)
- 61682: When re-prioritising HTTP/2 streams, ensure that both parent and children fields are correctly updated to avoid a possible `StackOverflowError`. (markt)
- Improve concurrency by reducing the scope of the synchronisation for `javax.security.auth.message.config.AuthConfigFactory` in the JASPIC API implementation. Based on a patch by Pavan Kumar. (markt)
- Avoid a possible `NullPointerException` when timing out `AsyncContext` instances during shut down. (markt)
- 61777: Avoid a `NullPointerException` when detaching a JASPIC `RegistrationListener`. Patch provided by Lazar. (markt)
- 61778: Correct the return value when detaching a JASPIC `RegistrationListener`. Patch provided by Lazar. (markt)
- 61779: Avoid a `NullPointerException` when a `null` `RegistrationListener` is passed to `AuthConfigFactory.getConfigProvider()`. Patch provided by Lazar. (markt)
- 61780: Only include the default JASPIC registration ID in the return value for a call to `AuthConfigFactory.getRegistrationIDs()` if a `RegistrationContext` has been registered using the default registration ID. Patch provided by Lazar. (markt)
- 61781: Enable JASPIC provider registrations to be persisted when the layer and/or application context are `null`. Patch provided by Lazar. (markt)
- 61782: When calling `AuthConfigFactory.doRegisterConfigProvider()` and the requested JASPIC config provider class is found by the web application class loader, do not attempt to load the class with the class loader that loaded the JASPIC API. Patch provided by Lazar. (markt)
- 61783: When calling `AuthConfigFactory.removeRegistration()` and the registration is persistent, it should be removed from the persistent store. Patch provided by Lazar. (markt)
- 61784: Correctly handle the case when `AuthConfigFactoryImpl.registerConfigProvider()` is called with a provider name of `null`. Patch provided by Lazar. (markt)
- 61795: Add a property to the `Authenticator` implementations to enable a custom JASPIC `CallbackHandler` to be specified. Patch provided by Lazar. (markt)

#### Coyote

- 61568: Avoid a potential `SecurityException` when using the NIO2 connector and a new thread is added to the pool. (markt)
- 61583: Correct a further regression in the fix to enable the use of Java key stores that contained multiple keys that did not all have the same password. This fixes PKCS11 key store handling with multiple keys selected with an alias. (markt)
- Improve NIO2 syncing for async IO operations. (remm)
- Sendfile support for HTTP/2 and NIO2. (remm)
- Reduce default HTTP/2 stream concurrent execution within a connection from 200 to 20. (remm)
- 61668: Avoid a possible NPE when calling `AbstractHttp11Protocol.getSSLProtocol()`. (markt)
- 61673: Avoid a possible `ConcurrentModificationException` when working with the streams associated with a connection. (markt)
- 61719: Avoid possible NPE calling InputStream.setReadListener with HTTP/2. (remm)
- 61736: Improve performance of NIO connector when clients leave large time gaps between network packets. Patch provided by Zilong Song. (markt)
- 61740: Correct an off-by-one error in the Hpack header index validation that caused intermittent request failures when using HTTP/2. (markt)

#### Jasper

- 61604: Fix SMAP generation for JSPs that generate no output. (markt)
- 61816: Invalid expressions in attribute values or template text should trigger a translation (compile time) error, not a run time error. (markt)

#### WebSocket

- 61604: Add support for authentication in the websocket client. Patch submitted by J Fernandez. (remm)

#### Web applications

- Correct Javadoc links to point to Java SE 8 and Java EE 8. (markt)
- Enable Javadoc to be built with Java 9. (markt)
- 61603: Add XML filtering for the status servlet output where needed. (remm)
- Correct the description of how the CGI servlet maps a request to a script in the CGI How-To. (markt)

#### Tribes

- Fix incorrect behavior that attempts to resend channel messages more than the actual setting value of `maxRetryAttempts`. (kfujino)
- Ensure that the remaining Sender can send channel messages by avoiding unintended `ChannelException` caused by comparing the number of failed members and the number of remaining Senders. (kfujino)
- Ensure that remaining SelectionKeys that were not handled by throwing a `ChannelException` during SelectionKey processing are handled. (kfujino)

#### Other

- Improve the fix for 61439 and exclude the JPA, JAX-WS and EJB annotations completely from the Tomcat distributions. (markt)
- Improve handling of endorsed directories. The endorsed directory mechanism will only be used if the `JAVA_ENDORSED_DIRS` system property is explicitly set or if `$CATALINA_HOME/endorsed` exists. When running on Java 9, any such attempted use of the endorsed directory mechanism will trigger an error and Tomcat will fail to start. (rjung)
- 51496: When using the Windows installer, check if the requested service name already exists and, if it does, prompt the user to select an alternative service name. Patch provided by Ralph Plawetzki. (markt)
- 61590: Enable `service.bat` to recognise when `JAVA_HOME` is configured for a Java 9 JDK. (markt)
- 61598: Update the Windows installer to search the new (as of Java 9) registry locations when looking for a JRE. (markt)
- Add generation of a SHA-512 hash for release artifacts to the build script. (markt)
- 61658: Update MIME mappings for fonts to use `font/*` as per RFC8081. (markt)
- Update the packaged version of the Tomcat Native Library to 1.2.16 to pick up the latest Windows binaries built with APR 1.6.3 and OpenSSL 1.0.2m. (markt)
- Update the NSIS Installer used to build the Windows installer to version 3.02.1. (kkolinko)
- Update the Windows installer to use "The Apache Software Foundation" as the Publisher when Tomcat is displayed in the list of installed applications in Microsoft Windows. (kkolinko)
- 61803: Remove outdated SSL information from the Security documentation. (remm)

### 2017-09-30 Tomcat 9.0.1 (markt)

#### Catalina

- Use the correct path when loading the JVM `logging.properties` file for Java 9. (rjung)
- Add additional validation to the resource handling required to fix CVE-2017-12617 on Windows. The checks were being performed elsewhere but adding them to the resource handling ensures that the checks are always performed. (markt)

#### Other

- 61563: Correct typos in Spanish translation. Patch provided by Gonzalo Vásquez. (csutherl)

### not released Tomcat 9.0.0 (markt)

#### Catalina

- 61542: Fix CVE-2017-12617 and prevent JSPs from being uploaded via a specially crafted request when HTTP PUT was enabled. (markt)
- 61554: Exclude test files in unusual encodings and markdown files intended for display in GitHub from RAT analysis. Patch provided by Chris Thistlethwaite. (markt)

#### Coyote

- 60762: Add the ability to make changes to the TLS configuration of a connector at runtime without having to restart the Connector. (markt)
- Add an option to reject requests that contain HTTP headers with invalid (non-token) header names with a 400 response and reject such requests by default. (markt)
- Implement the requirements of RFC 7230 (and RFC 2616) that HTTP/1.1 requests must include a `Host` header and any request that does not must be rejected with a 400 response. (markt)
- Implement the requirements of RFC 7230 that any HTTP/1.1 request that specifies a host in the request line, must specify the same host in the `Host` header and that any such request that does not, must be rejected with a 400 response. This check is optional but enabled by default. It may be disabled with the `allowHostHeaderMismatch` attribute of the Connector. (markt)
- Implement the requirements of RFC 7230 that any HTTP/1.1 request that contains multiple `Host` headers is rejected with a 400 response. (markt)
- Add a way to set the property source in embedded mode. (remm)
- 61557: Correct a further regression in the fix to enable the use of Java key stores that contain multiple keys that do not all have the same password. The regression broke support for some FIPS compliant key stores. (markt)

#### jdbc-pool

- 61545: Correctly handle invocations of methods defined in the `PooledConnection` interface when using pooled XA connections. Patch provided by Nils Winkler. (markt)

#### Other

- Update fix for 59904 so that values less than zero are accepted instead of throwing a NegativeArraySizeException. (remm)
- Complete the implementation of the Servlet 4.0 specification. (markt)

### 2017-09-19 Tomcat 9.0.0.M27 (markt)

#### Catalina

- Before generating an error page in the `ErrorReportValve`, check to see if I/O is still permitted for the associated connection before generating the error page so that the page generation can be skipped if the page is never going to be sent. (markt)
- 61189: Add the ability to set environment variables for individual CGI scripts. Based on a patch by jm009. (markt)
- 61210: When running under a SecurityManager, do not print a warning about not being able to read a logging configuration file when that file does not exist. (markt)
- 61280: Add RFC 7617 support to the `BasicAuthenticator`. Note that the default configuration does not change the existing behaviour. (markt)
- 61424: Avoid a possible `StackOverflowError` when running under a `SecurityManager` and using `Subject.doAs()`. (markt)
- When running under Java 9 or later, and the `urlCacheProtection` option of the `JreMemoryLeakPreventionListener` is enabled, use the API added in Java 9 to only disable the caching for JAR URL connections. (markt)
- 61489: When using the CGI servlet, make the generation of command line arguments from the query string (as per section 4.4 of RFC 3875) optional and disabled by default. Based on a patch by jm009. (markt)
- 61503: This corrects a potential regression in the fix for 60940 with an alternative solution that adds the `JarEntry` objects normally skipped by a `JarInputStream` only if those entries exist. (markt)

#### Coyote

- The minimum required Tomcat Native version has been increased to 1.2.14. This version includes a new API needed for correct client certificate support when using a Java connector with OpenSSL TLS implementation and support for the `SSL_CONF` OpenSSL API. (rjung)
- Add support for the OpenSSL `SSL_CONF` API when using TLS with OpenSSL implementation. It can be used by adding `OpenSSLConf` elements underneath `SSLHostConfig`. The new element contains a list of `OpenSSLConfCmd` elements, each with the attributes `name` and `value`. (rjung)
- When using a Java connector in combination with the OpenSSL TLS implementation, do not configure each SSL connection object via the OpenSSLEngine. For OpenSSL the SSL object inherits its settings from the SSL_CTX which we have already configured. (rjung)
- When using JSSE TLS configuration with the OpenSSL implementation and client certificates: include client CA subjects in the TLS handshake so that the client can choose an appropriate client certificate to present. (rjung)
- If an invalid option is specified for the `certificateVerification` attribute of an `SSLHostConfig` element, treat it as `required` which is the most secure / restrictive option in addition to reporting the configuration error. (markt)
- Improve the handling of client disconnections during the TLS renegotiation handshake. (markt)
- Prevent exceptions being thrown during normal shutdown of NIO connections. This enables TLS connections to close cleanly. (markt)
- Fix possible race condition when setting IO listeners on an upgraded connection. (remm)
- Ensure that the APR/native connector uses blocking I/O for TLS renegotiation. (markt)
- 48655: Enable Tomcat to shutdown cleanly when using sendfile, the APR/native connector and a multi-part download is in progress. (markt)
- 58244: Handle the case when OpenSSL resumes a TLS session using a ticket and the full client certificate chain is not available. In this case the client certificate without the chain will be presented to the application. (markt)
- Improve the warning message when JSSE and OpenSSL configuration styles are mixed on the same `SSLHostConfig`. (markt)
- 61415: Fix TLS renegotiation with OpenSSL based connections and session caching. (markt)
- Delay checking that the configured attributes for an `SSLHostConfig` instance are consistent with the configured SSL implementation until `Connector` start to avoid incorrect warnings when the SSL implementation changes during initialisation. (markt)
- 61450: Fix default key alias algorithm. (remm)
- 61451: Correct a regression in the fix to enable the use of Java key stores that contained multiple keys that did not all have the same password. The regression broke support for any key store that did not store keys in PKCS #8 format such as hardware key stores and Windows key stores. (markt)

#### WebSocket

- 60523: Reduce the number of packets used to send WebSocket messages by not flushing between the header and the payload when the two are written together. (markt)
- 61491: When using the `permessage-deflate` extension, correctly handle the sending of empty messages after non-empty messages to avoid the `IllegalArgumentException`. (markt)

#### Web applications

- Show connector cipher list in the manager web application in the correct cipher order. (rjung)

#### Tribes

- To avoid unexpected session timeout notification from backup session, update the access time when receiving the map member notification message. (kfujino)
- Add member info to the log message when the failure detection check fails in `TcpFailureDetector`. (kfujino)
- Avoid Ping timeout until the added map member by receiving `MSG_START` message is completely started. (kfujino)
- When sending a channel message, make sure that the Sender has connected. (kfujino)
- Correct the backup node selection logic that node 0 is returned twice consecutively. (kfujino)
- Fix race condition of `responseMap` in `RpcChannel`. (kfujino)

#### jdbc-pool

- 61391: Ensure that failed queries are logged if the `SlowQueryReport` interceptor is configured to do so and the connection has been abandoned. Patch provided by Craig Webb. (markt)
- 61425: Ensure that transaction of idle connection has terminated when the `testWhileIdle` is set to `true` and `defaultAutoCommit` is set to `false`. Patch provided by WangZheng. (kfujino)

#### Other

- 61419: Replace a Unix style comment in the DOS bat file `catalina.bat` with the correct `rem` markup. (rjung)
- 61439: Remove the Java Annotation API classes from tomcat-embed-core.jar and package them in a separate JAR in the embedded distribution to provide end users with greater flexibility to handle potential conflicts with the JRE and/or other JARs. (markt)
- 61441: Improve the detection of `JAVA_HOME` by the `daemon.sh` script when running on a platform where Java has been installed from an RPM. (rjung)
- Update the packaged version of the Tomcat Native Library to 1.2.14 to pick up the latest Windows binaries built with APR 1.6.2 and OpenSSL 1.0.2l. (markt)
- 61599: Update to Commons Daemon 1.1.0 for improved Java 9 support. (markt)

### 2017-08-08 Tomcat 9.0.0.M26 (markt)

#### Catalina

- Correct multiple regressions in the fix for 49464 that could corrupt static content served by the `DefaultServlet`.(markt)
- Correct a bug in the `PushBuilder` implementation that meant push URLs containing `%nn` sequences were not correctly decoded. Identified by FindBugs. (markt)
- 61164: Add support for the `%X` pattern in the `AccessLogValve` that reports the connection status at the end of the request. Patch provided by Zemian Deng. (markt)
- 61351: Correctly handle %nn decoding of URL patterns in web.xml and similar locations that may legitimately contain characters that are not permitted by RFC 3986. (markt)
- 61366: Add a new attribute, `localDataSource`, to the `JDBCStore` that allows the Store to be configured to use a DataSource defined by the web application rather than the default of using a globally defined DataSource. Patch provided by Jonathan Horowitz. (markt)

#### Coyote

- 61086: Ensure to explicitly signal an empty request body for HTTP 205 responses. Additional fix to r1795278. Based on a patch provided by Alexandr Saperov. (violetagg)
- 61345: Add a server listener that can be used to do system property replacement from the property source configured in the digester. (remm)
- Add additional logging to record problems that occur while waiting for the NIO pollers to stop during the Connector stop process. (markt)

#### Jasper

- 61364: Ensure that files are closed after detecting encoding of JSPs so that files do not remain locked by the file system. (markt)

#### WebSocket

- 57767: Add support to the WebSocket client for following redirects when attempting to establish a WebSocket connection. Patch provided by J Fernandez. (markt)

### 2017-07-28 Tomcat 9.0.0.M25 (markt)

#### Catalina

- Performance improvements for service loader look-ups (and look-ups of other class loader resources) when the web application is deployed in a packed WAR file. (markt)
- 60963: Add `ExtractingRoot`, a new `WebResourceRoot` implementation that extracts JARs to the work directory for improved performance when deploying packed WAR files. (markt)
- 61253: Add warn message when Digester.updateAttributes throws an exception instead of ignoring it. (csutherl)
- Correct a further regression in the fix for 49464 that could cause an byte order mark character to appear at the start of content included by the `DefaultServlet`. (markt)
- 61313: Make the read timeout configurable in the `JNDIRealm` and ensure that a read timeout will result in an attempt to fail over to the alternateURL. Based on patches by Peter Maloney and Felix Schumacher. (markt)

#### Web applications

- Correct the documentation for how `StandardRoot` is configured. (markt)

#### Other

- 61316: Fix corruption of UTF-16 encoded source files in released source distributions. (markt)

### not released Tomcat 9.0.0.M24 (markt)

#### Catalina

- 52924: Add support for a Tomcat specific deployment descriptor, `/WEB-INF/tomcat-web.xml`. This descriptor has an identical format to `/WEB-INF/web.xml`. The Tomcat descriptor takes precedence over any settings in `conf/web.xml` but does not take precedence over any settings in `/WEB-INF/web.xml`. (markt)
- 61232: When log rotation is disabled only one separator will be used when generating the log file name. For example if the prefix is `catalina.` and the suffix is `.log` then the log file name will be `catalina.log` instead of `catalina..log`. Patch provided by Katya Stoycheva. (violetagg)
- 61264: Correct a regression in the refactoring to use `Charset` rather than `String` to store request character encoding that prevented `getReader()` throwing an `UnsupportedEncodingException` if the user agent specifies an unsupported character encoding. (markt)
- Correct a regression in the fix for 49464 that could cause an incorrect `Content-Length` header to be sent by the `DefaultServlet` if the encoding of a static is not consistent with the encoding of the response. (markt)

#### Coyote

- Enable TLS connectors to use Java key stores that contain multiple keys where each key has a separate password. Based on a patch by Frank Taffelt. (markt)
- Improve the handling of HTTP/2 stream resets due to excessive headers when a continuation frame is used. (markt)

#### Jasper

- 53031: Add support for the `fork` option when compiling JSPs with the Jasper Ant task and javac. (markt)

#### Other

- 52791: Add the ability to set the defaults used by the Windows installer from a configuration file. Patch provided by Sandra Madden. (markt)

### not released Tomcat 9.0.0.M23 (markt)

#### Catalina

- 49464: Improve the Default Servlet's handling of static files when the file encoding is not compatible with the required response encoding. (markt)
- 61214: Remove deleted attribute `servlets` from the Context MBean description. Patch provided by Alexis Hassler. (markt)
- 61215: Correctly define `addConnectorPort` and `invalidAuthenticationWhenDeny` in the `mbean-descriptors.xml` file for the `org.apache.catalina.valves` package so that the attributes are accessible via JMX. (markt)
- 61216: Improve layout for `CompositeData` and `TabularData` when viewing via the JMX proxy servlet. Patch provided by Alexis Hassler. (markt)
- Additional permission for deleting files is granted to JULI as it is required by FileHandler when running under a Security Manager. The thread that cleans the log files is marked as daemon thread. (violetagg)
- 61229: Correct a regression in 9.0.0.M21 that broke WebDAV handling for resources with names that included a `&` character. (markt)

#### Coyote

- Restore the ability to configure support for SSLv3. Enabling this protocol will trigger a warning in the logs since it is known to be insecure. (markt)
- Add LoadBalancerDrainingValve, a Valve designed to reduce the amount of time required for a node to drain its authenticated users. (schultz)
- Do not log a warning when a `null` session is returned for an OpenSSL based TLS session since this is expected when session tickets are enabled. (markt)
- When the access log valve logs a TLS related request attribute and the NIO2 connector is used with OpenSSL, ensure that the TLS attributes are available to the access log valve when the connection is closing. (markt)
- 60461: Sync SSL session access for the APR connector. (remm)
- 61224: Make the `GlobalRequestProcessor` MBean attributes read-only. Patch provided by Alexis Hassler. (markt)

#### Jasper

- 49176: When generating JSP runtime error messages that quote the relevant JSP source code, switch from using the results of the JSP page parsing process to using the JSR 045 source map data to identify the correct part of the JSP source from the stack trace. This significantly reduces the memory footprint of Jasper in development mode, provides a small performance improvement for error page generation and enables source quotes to continue to be provided after a Tomcat restart. (markt)

#### Web applications

- Remove references to the Loader attribute `searchExternalFirst` from the documentation since the attribute is no longer supported. (markt)

#### Tribes

- 51513: Add support for the `compressionMinSize` attribute to the `GzipInterceptor`, add optional statistics collection and expose the Interceptor over JMX. Based on a patch by Christian Stöber. (markt)
- 61127: Allow human-readable names for channelSendOptions and mapSendOptions. Patch provided by Igal Sapir. (schultz)

#### Other

- Restore the local definition of the web service annotations since the JRE provided versions are deprecated and Java 9 does not provide them by default. (markt)
- Add necessary Java 9 configuration options to the startup scripts to prevent warnings being generated on web application stop. (markt)

### 2017-06-26 Tomcat 9.0.0.M22 (markt)

#### Catalina

- 48543: Add the option to specify an alternative file name for the `catalina.config` system property. Also document that relative, as well as absolute, URLs are permitted. (markt)
- 61072: Respect the documentation statements that allow using the platform default secure random for session id generation. (remm)
- Correct the javadoc for `o.a.c.connector.CoyoteAdapter#parseSessionCookiesId`. Patch provided by John Andrew (XUZHOUWANG) via Github. (violetagg)
- 61101: CORS filter should set Vary header in response. Submitted by Rick Riemer. (remm)
- 61105: Add a new JULI FileHandler configuration for specifying the maximum number of days to keep the log files. By default the log files will be kept 90 days as configured in `logging.properties`. (violetagg)
- Update the Servlet 4.0 implementation to add support for setting trailer fields for HTTP responses. (markt)
- 61125: Ensure that `WarURLConnection` returns the correct value for calls to `getLastModified()` as this is required for the correct detection of JSP modifications when the JSP is packaged in a WAR file. (markt)
- Improve the `SSLValve` so it is able to handle client certificate headers from Nginx. Based on a patch by Lucas Ventura Carro. (markt)
- 61134: Do not use '[' and ']' symbols around substituted text fragments when generating the default error pages. Patch provided by Katya Todorova. (violetagg)
- 61154: Allow the Manager and Host Manager web applications to start by default when running under a security manager. This was accomplished by adding a custom permission, `org.apache.catalina.security.DeployXmlPermission`, that permits an application to use a `META-INF/context.xml` file and then granting that permission to the Manager and Host Manager. (markt)
- 61173: Polish the javadoc for `o.a.catalina.startup.Tomcat`. Patch provided by peterhansson_se. (violetagg)
- A new configuration property `crawlerIps` is added to the `o.a.catalina.valves.CrawlerSessionManagerValve`. Using this property one can specify a regular expression that will be used to identify crawlers based on their IP address. Based on a patch provided by Tetradeus. (violetagg)
- 61180: Log a warning message rather than an information message if it takes more than 100ms to initialised a `SecureRandom` instance for a web application to use to generate session identifiers. Patch provided by Piotr Chlebda. (markt)
- 61185: When an asynchronous request is dispatched via `AsyncContext.dispatch()` ensure that `getRequestURI()` for the dispatched request matches that of the original request. (markt)
- 61197: Ensure that the charset name used in the `Content-Type` header has exactly the same form as that provided by the application. This reverts a behavioural change in 9.0.0.M21 that caused problems for some clients. (markt)
- 61201: Ensure that the `SCRIPT_NAME` environment variable for CGI executables is populated in a consistent way regardless of how the CGI servlet is mapped to a request. (markt)
- Ensure to send a space between trailer field name and field value for HTTP responses trailer fields. (huxing)

#### Coyote

- 61086: Explicitly signal an empty request body for HTTP 205 responses. (markt)
- 61120: Do not ignore path parameters when processing HTTP/2 requests. (markt)
- Revert a change introduced in the fix for bug 60718 that changed the status code recorded in the access log when the client dropped the connection from 200 to 500. (markt)
- Make asynchronous error handling more robust. In particular ensure that `onError()` is called for any registered `AsyncListener`s after an I/O error on a non-container thread. (markt)
- Add additional syncs to the SSL session object provided by the OpenSSL engine so that a concurrent destruction cannot cause a JVM crash. (remm)

#### Jasper

- 44787: Improve error message when JSP compiler configuration options are not valid. (markt)
- 45931: Extend Jasper's `timeSpaces` option to add support for `single` which replaces template text that consists entirely of whitespace with a single space character. Based on a patch by Meetesh Karia. (markt)
- 53011: When pre-compiling with JspC, report all compilation errors rather than stopping after the first error. A new option `-failFast` can be used to restore the previous behaviour of stopping after the first error. Based on a patch provided by Marc Pompl. (markt)
- 61137: `j.s.jsp.tagext.TagLibraryInfo#uri` and `j.s.jsp.tagext.TagLibraryInfo#prefix` fields should not be final. Patch provided by Katya Todorova. (violetagg)

#### WebSocket

- Correct the log message when a `MessageHandler` for `PongMessage` does not implement `MessageHandler.Whole`. (rjung)
- Improve thread-safety of `Future`s used to report the result of sending WebSocket messages. (markt)
- 61183: Correct a regression in the previous fix for 58624 that could trigger a deadlock depending on the locking strategy employed by the client code. (markt)

#### Web applications

- Better document the meaning of the trimSpaces option for Jasper. (markt)
- 61150: Configure the Manager and Host-Manager web applications to permit serialization and deserialization of CRSFPreventionFilter related session objects to avoid warning messages and/or stack traces on web application stop and/or start when running under a security manager. (markt)
- Correct the TLS configuration documentation to remove SSLv2 and SSLv3 from the list of supported protocols. (markt)

#### Other

- 45832: Add HTTP DIGEST authentication support to the Catalina Ant tasks used to communicate with the Manager application. (markt)
- 45879: Add the `RELEASE-NOTES` file to the root of the installation created by the Tomcat installer for Windows to make it easier for users to identify the installed Tomcat version. (markt)
- 61055: Clarify the code comments in the rewrite valve to make clear that there are no plans to provide proxy support for this valve since Tomcat does not have proxy capabilities. (markt)
- 61076: Document the `altDDName` attribute for the `Context` element. (markt)
- Correct typo in Jar Scan Filter Configuration Reference. Issue reported via comments.apache.org. (violetagg)
- Correct the requirement for the minimum Java SE version in Application Developer's Guide. Issue reported via comments.apache.org. (violetagg)
- 61145: Add missing `@Documented` annotation to annotations in the annotations API. Patch provided by Katya Todorova. (markt)
- 61146: Add missing `lookup()` method to `@EJB` annotation in the annotations API. Patch provided by Katya Todorova. (markt)
- Correct typo in Context Container Configuration Reference. Patch provided by Katya Todorova. (violetagg)

### 2017-05-10 Tomcat 9.0.0.M21 (markt)

#### General

- Allow to exclude JUnit test classes using the build property `test.exclude` and document the property in BUILDING.txt. (rjung)

#### Catalina

- Review those places where Tomcat re-encodes a URI or URI component and ensure that the correct encoding (path differs from query string) is applied and that the encoding is applied consistently. (markt)
- Avoid a `NullPointerException` when reading attributes for a initialised HTTP connector where TLS is enabled. (markt)
- Always quote the `hostName` of an `SSLHostConfig` element when using it as part of the JMX object name to avoid errors that prevent the associated TLS connector from starting if a wild card `hostName` is configured (because `*` is a reserved character for JMX object names). (markt)
- Update the default `URIEncoding` for a `Connector` to `UTF-8` as required by the Servlet 4.0 specification. (markt)
- Switch to using `Charset` rather than `String` to store encoding settings (including for configuration and for the `Content-Type header`) to reduce the number of places the associated `Charset` needs to be looked up. (markt)
- Use a more reliable mechanism for the `DefaultServlet` when determining if the current request is for custom error page or not. (markt)
- Ensure that when the Default or WebDAV servlets process an error dispatch that the error resource is processed via the `doGet()` method irrespective of the method used for the original request that triggered the error. (markt)
- If a static custom error page is specified that does not exist or cannot be read, ensure that the intended error status is returned rather than a 404 or 403. (markt)
- When the WebDAV servlet is configured and an error dispatch is made to a custom error page located below `WEB-INF`, ensure that the target error page is displayed rather than a 404 response. (markt)
- Update the Servlet 4.0 implementation to add support for obtaining trailer fields from chunked HTTP requests. (markt)
- 61047: Add MIME mapping for woff2 fonts in the default web.xml. Patch provided by Justin Williamson. (violetagg)
- Correct the logic that selects the encoding to use to decode the query string in the `SSIServletExternalResolver` so that the `useBodyEncodingForURI` attribute of the `Connector` is correctly taken into account. (markt)
- Within the Expires filter, make the content type value specified with the `ExpiresByType` parameter, case insensitive. (markt)

#### Coyote

- When a `TrustManager` is configured that does not support `certificateVerificationDepth` only log a warning about that lack of support when `certificateVerificationDepth` has been explicitly set. (markt)
- 60970: Extend the fix for large headers to push requests. (markt)
- Do not include a `Date` header in HTTP/2 responses with status codes less than 200. (markt)
- When sending an HTTP/2 push promise with the NIO2 connector, the pushed stream ID should only be included with the initial push promise frame and not any subsequent continuation frames. (markt)

#### Jasper

- When no BOM is present and an encoding is detected, do not skip the bytes used to detect the encoding since they are not part of a BOM. (markt)
- 61057: Update to Eclipse JDT Compiler 4.6.3. (violetagg)
- 61065: Ensure that once the class is resolved by `javax.el.ImportHandler#resolveClass` it will be cached with the proper name. (violetagg)

#### WebSocket

- Introduce new API `o.a.tomcat.websocket.WsSession#suspend`/ `o.a.tomcat.websocket.WsSession#resume` that can be used to suspend/resume reading of the incoming messages. (violetagg)
- 61003: Ensure the flags for reading/writing in `o.a.t.websocket.AsyncChannelWrapperSecure` are correctly reset even if some exceptions occurred during processing. (markt/violetagg)

#### Web Applications

- Add documents for `maxIdleTime` attribute to Channel Receiver docs. (kfujino)

#### Tribes

- Add features to get the statistics of the thread pool of the `Receiver` component and `MessageDispatchInterceptor`. These statistics information can be acquired via JMX. (kfujino)
- Add `maxIdleTime` attribute to `NioReceiverMBean` in order to expose to JMX. (kfujino)
- Add JMX support for `Channel Interceptors`. The Interceptors that implement JMX support are `TcpFailureDetector`, `ThroughputInterceptor`, `TcpPingInterceptor`, `StaticMembershipInterceptor`, `MessageDispatchInterceptor` and `DomainFilterInterceptor`. (kfujino)

#### Other

- Modify the Ant build script used to publish to a Maven repository so that it no longer requires artifacts to be GPG signed. This is make it possible for the CI system to upload snapshot builds to the ASF Maven repository. (markt)

### 2017-04-18 Tomcat 9.0.0.M20 (markt)

#### Catalina

- Update the Servlet 4.0 API implementation to reflect the change in method name from `getPushBuilder()` to `newPushBuilder()`. (markt)
- Correct various edge cases in the new HTTP Host header validation parser. Patch provided by Katya Todorova. (martk)
- Correct a regression in the X to comma refactoring that broke JMX operations that take parameters. (markt)
- Avoid a `NullPointerException` when reading attributes for a running HTTP connector where TLS is not enabled. (markt)
- 47214: Refactor code so that explicitly referenced inner classes are given explicit names rather than being anonymous. (markt)
- 59825: Log a message that lists the components in the processing chain that do not support async processing when a call to `ServletRequest.startAsync()` fails. (markt)
- 60940: Improve the handling of the `META-INF/` and `META-INF/MANIFEST.MF` entries for Jar files located in `/WEB-INF/lib` when running a web application from a packed WAR file. (markt)
- Pre-load the `ExceptionUtils` class. Since the class is used extensively in error handling, it is prudent to pre-load it to avoid any failure to load this class masking the true problem during error handling. (markt)
- Avoid potential `NullPointerException`s related to access logging during shutdown, some of which have been observed when running the unit tests. (markt)
- When there is no `javax.servlet.WriteListener` registered then a call to `javax.servlet.ServletOutputStream#isReady` will return `false` instead of throwing `IllegalStateException`. (violetagg)
- When there is no `javax.servlet.ReadListener` registered then a call to `javax.servlet.ServletInputStream#isReady` will return `false` instead of throwing `IllegalStateException`. (violetagg)

#### Coyote

- Align cipher configuration parsing with current OpenSSL master. (markt)
- 60970: Fix infinite loop if application tries to write a large header to the response when using HTTP/2. (markt)

#### Jasper

- 47214: Refactor code so that explicitly referenced inner classes are given explicit names rather than being anonymous. (markt)
- 60925: Improve the handling of access to properties defined by interfaces when a `BeanELResolver` is used under a `SecurityManager`. (markt)

#### Tribes

- Add JMX support for Tribes components. (kfujino)

#### jdbc-pool

- Refactor the creating a constructor for a proxy class to reduce duplicate code. (kfujino)
- In `StatementFacade`, the method call on the statements that have been closed throw `SQLException` rather than `NullPointerException`. (kfujino)

#### Other

- 60932: Correctly escape single quotes when used in i18n messages. Based on a patch by Michael Osipov. (markt)
- Review i18n property files, remove unnecessary escaping and consistently use `[...]` to delimit inserted values. (markt)
- Update the custom Ant task that integrates with the Symantec code signing service to use the now mandatory 2-factor authentication. (markt)
- Refactoring in preparation for Java 9. Refactor to avoid using some methods that will be deprecated in Java 9 onwards. (markt)

### 2017-03-30 Tomcat 9.0.0.M19 (markt)

#### Catalina

- 54618: Add support to the `HttpHeaderSecurityFilter` for the HSTS preload parameter. (markt)
- Correct a bug in the implementation of the Servlet 4.0 feature that allows specifying a default request and/or response character encoding per web application. `null` values passed via the programmatic interface no longer trigger a `NullPointerException`. (markt)
- Correct a potential exception during shutdown when one or more Containers are configured with a value of 1 for startStopThreads. (markt)
- 60853: Expose the `SSLHostConfig` and `SSLHostConfigCertificate` objects via JMX. (markt)
- 60876: Ensure that `Set-Cookie` headers generated by the `Rfc6265CookieProcessor` are aligned with the specification. Patch provided by Jim Griswold. (markt)
- 60882: Fix a `NullPointerException` when obtaining a `RequestDispatcher` for a request that will not have any pathInfo associated with it. This was a regression in the changes in 9.0.0.M18 for the Servlet 4.0 API changes. (markt)
- Align `PushBuilder` API with changes from the Servlet expert group. (markt)
- Align web.xml parsing rules with changes from the Servlet expert group for `<request-character-encoding>` and `<response-character-encoding>`. (markt)
- Refactor the various implementations of X to comma separated list to a single utility class and update the code to use the new utility class. (markt)
- 60911: Ensure NPE will not be thrown when looking for SSL session ID. Based on a patch by Didier Gutacker. (violetagg)

#### Coyote

- Add async based IO groundwork for HTTP/2. (remm)
- Fix HTTP/2 incorrect input unblocking on EOF. (remm)
- Close the connection sooner if an event occurs for a current connection that is not consistent with the current state of that connection. (markt)
- Speed up shutdown when using multiple acceptor threads by ensuring that the code that unlocks the acceptor threads correctly handles the case where there are multiple threads. (markt)
- 60851: Add `application/xml` and `application/json` to the default list of compressible MIME types. Patch by Michael Osipov. (markt)
- 60852: Correctly spell compressible when used in configuration attributes and internal code. Based on a patch by Michael Osipov. (markt)
- 60900: Avoid a `NullPointerException` in the APR Poller if a connection is closed at the same time as new data arrives on that connection. (markt)
- Improve HPACK specification compliance by fixing some test failures reported by the h2spec tool written by Moto Ishizawa. (markt)
- Improve HTTP/2 specification compliance by fixing some test failures reported by the h2spec tool written by Moto Ishizawa. (markt)
- 60918: Fix sendfile processing error that could lead to subsequent requests experiencing an `IllegalStateException`. (markt)
- Improve sendfile handling when requests are pipelined. (markt)

#### Jasper

- 60844: Correctly handle the error when fewer parameter values than required by the method are used to invoke an EL method expression. Patch provided by Daniel Gray. (markt)

#### jdbc-pool

- 60764: Implement `equals()` and `hashCode()` in the `StatementFacade` in order to enable these methods to be called on the closed statements if any statement proxy is set. This behavior can be changed with `useStatementFacade` attribute. (kfujino)

#### Other

- Refactor the build script and the NSIS installer script so that either NSIS 2.x or NSIS 3.x can be used to build the installer. This is primarily to re-enable building the installer on the Linux based CI system where the combination of NSIS 3.x and wine leads to failed installer builds. (markt)

### 2017-03-13 Tomcat 9.0.0.M18 (markt)

#### Catalina

- 60469: Refactor `RealmBase` for better code re-use when implementing Realms that use a custom `Principal`. (markt)
- 60490: Various formatting and layout improvements for the `ErrorReportValve`. Patch provided by Michael Osipov. (markt)
- 60573: Remove the reason phrase when sending a `100` response status for consistency with other response status lines. Patch provided by Michael Osipov. (markt)
- 60596: Improve performance of DefaultServlet when sendfile feature is disabled on connector. (kkolinko)
- Make it easier for sub-classes of `Tomcat` to modify the default web.xml settings by over-riding `getDefaultWebXmlListener()`. Patch provided by Aaron Anderson. (markt)
- Reduce the contention in the default `InstanceManager` implementation when multiple threads are managing objects and need to reference the annotation cache. (markt)
- 60623: When startStopThreads is 1 (or a special value that is equivalent to 1) then rather than using an `ExecutorService` to start the children of the current component, the children will be started on the current thread. (markt)
- 60674: Remove `final` marker from `CorsFilter` to enable sub-classing. (markt)
- 60683: Security manager failure causing NPEs when doing IO on some JVMs. (csutherl)
- 60688: Update the internal fork of Apache Commons BCEL to r1782855 to add early access Java 9 support to the annotation scanning code. (markt)
- 60694: Prevent NPE during authentication when no JASPIC `AuthConfigFactory` is available. (markt)
- 60697: When HTTP TRACE requests are disabled on the Connector, ensure that the HTTP OPTIONS response from custom servlets does not include TRACE in the returned Allow header. (markt)
- 60718: Improve error handling for asynchronous processing and correct a number of cases where the `requestDestroyed()` event was not being fired and an entry wasn't being made in the access logs. (markt)
- 60720: Replace "WWW-Authenticate" literal with static final AUTH_HEADER_NAME in SpnegoAuthenticator. Patch provided by Michael Osipov. (violetagg)
- The default JASPIC `AuthConfigFactory` now correctly notifies registered `RegistrationListener`s when a new `AuthConfigProvider` is registered. (markt)
- Improve the performance of `AuthenticatorBase` when there is no JASPIC configuration available. (violetagg)
- When HTTP TRACE requests are disabled on the Connector, ensure that the HTTP OPTIONS response from the WebDAV servlet does not include TRACE in the returned Allow header. (markt)
- 60722: Take account of the dispatchersUseEncodedPaths setting on the current Context when generating paths for dispatches triggered by `AsyncContext.dispatch()`. (markt)
- 60728: Make the separator Tomcat uses in the Tomcat specific `war:file:...` URL protocol customizable via a system property. The separator is equivalent to the use of the `!` character in `jar:file:...` URLs. The default separator of `*` remains unchanged. (markt)
- Update the Servlet 4.0 API implementation to align with the latest proposals from the Servlet 4.0 expert group. This includes updates to the new Servlet mapping API, new methods on the `ServletContext` to make the available API more equivalent to the deployment descriptor, updates to the HTTP push API and the ability to set default request and response character encoding per web application. Note that the Servlet 4.0 API is still a work in progress and further changes are likely. (markt)
- 60798: Correct a bug in the handling of JARs in unpacked WARs that meant multiple attempts to read the same entry from a JAR in succession would fail for the second and subsequent attempts. (markt)
- 60808: Ensure that the `Map` returned by `ServletRequest.getParameterMap()` is fully immutable. Based on a patch provided by woosan. (markt)
- 60824: Correctly cache the `Subject` in the session - if there is a session - when running under a `SecurityManager`. Patch provided by Jan Engehausen. (markt)
- Ensure request and response facades are used when firing application listeners. (markt/remm)

#### Coyote

- Improve handling of case when an HTTP/2 client sends more data that is subject to flow control than the current window size allows. (markt)
- Improve NIO2 look-ahead parsing of TLS client hello for SNI with large client hello messages. (markt)
- Enable ALPN and also, therefore, HTTP/2 for the NIO and NIO2 HTTP connectors when using the JSSE implementation for TLS when running on Java 9. (markt)
- Restore Java 9 direct byte buffer compatibility. (remm)
- 59807: Provide a better error message when there is no SSLHostConfig defined with a `hostName` that matches the `defaultSSLHostConfigName` for the associated Connector. (markt)
- 60627: Modify the `Rfc6265CookieProcessor` so that in addition to cookie headers that start with an explicit RFC 2109 `$Version=1`, cookies that start with `$Version=0` are also parsed as RFC 2109 cookies. (markt)
- Include the value of `SslHostConfig.truststoreAlgorithm` when warning that the algorithm does not support the `certificateVerificationDepth` configuration option. (markt)
- Ensure that executor thread pools used with connectors pre-start the configured minimum number of idle threads. (markt)
- 60716: Add a new JSSE specific attribute, `revocationEnabled`, to `SSLHostConfig` to permit JSSE provider revocation checks to be enabled when no `certificateRevocationListFile` has been configured. The expectation is that configuration will be performed via a JSSE provider specific mechanisms. (markt)
- Modify the cookie header generated by the `Rfc6265CookieProcessor` so it always sends an `Expires` attribute as well as a `Max-Age` attribute to avoid problems with Microsoft browsers that do not support the `Max-Age` attribute. (markt)
- 60761: Expose a protected getter and setter for `NioEndpoint.stopLatch` to make the class easier to extend. (markt)
- Prevent blocking reads after a stream exception occurs with HTTP/2. (remm)

#### Jasper

- Follow up to the fix for 58178. When creating the `ELContext` for a tag file, ensure that any registered `ELContextListener`s are fired. (markt)
- Refactor code generated for JSPs to reduce the size of the code required for tags. (markt)
- Improve the error handling for simple tags to ensure that the tag is released and destroyed once used. (remm, violetagg)
- 60769: Correct a regression in the XML encoding detection refactoring carried out for 9.0.0.M16 that incorrectly always used the detected BOM encoding in preference to any encoding specified in the prolog. (markt)

#### Cluster

- Make the `accessTimeout` configurable in `BackupManager` and `ClusterSingleSignOn`. The `accessTimeout` is used as a timeout period for PING in replication map. (kfujino)
- 60806: To avoid `ClassNotFoundException`, make sure that the web application class loader is passed to `ReplicatedContext`. (kfujino)

#### WebSocket

- 60617: Correctly create a `CONNECT` request when establishing a WebSocket connection via a proxy. Patch provided by Svetlin Zarev. (markt)

#### Tribes

- Add log message that PING message has received beyond the timeout period. (kfujino)
- When a PING message that beyond the time-out period has been received, make sure that valid member is added to the map membership. (kfujino)
- Ensure that `NoRpcChannelReply` messages are not received on `RpcCallback`. (kfujino)

#### Web Applications

- Add Specification and Javadoc references for JASPIC to the Docs application. (csutherl)

#### Other

- Spelling corrections provided by Josh Soref. (violetagg)
- Remove local definition of web service annotations since these are provided by the JRE. (markt)
- Update the packaged version of the Tomcat Native Library to 1.2.12 to pick up the latest Windows binaries built with OpenSSL 1.0.2k. (violetagg)
- 60784: Update all unit tests that test the HTTP status line to check for the required space after the status code. Patch provided by Michael Osipov. (markt)

### 2017-01-16 Tomcat 9.0.0.M17 (markt)

#### Catalina

- 60620: Extend the `JreMemoryLeakPreventionListener` to provide protection against `ForkJoinPool.commonPool()` related memory leaks. (markt)

#### Coyote

- Ensure UpgradeProcessor instances associated with closed connections are removed from the map of current connections to Processors. (markt)
- Remove a workaround for a problem previously reported with WebSocket, TLS and APR that treated some error conditions as not errors. The original problem cannot be reproduced with the current code and the work-around is now causing problems. (markt)

#### Jasper

- 60497: Follow up fix using a better variable name for the tag reuse flag. (remm)
- Revert use of try/finally for simple tags. (remm)

#### WebSocket

- Prevent potential processing loop on unexpected WebSocket connection closure. (markt)

#### jdbc-pool

- Enable reset the statistics without restarting the pool. (kfujino)

#### Other

- Update the NSIS Installer used to build the Windows installer to version 3.01. (markt)
- Spelling corrections provided by Josh Soref. (violetagg)

### not released Tomcat 9.0.0.M16 (markt)

#### Catalina

- 53602: Add HTTP status code 451 (RFC 7725) to the list of HTTP status codes recognised by the ErrorReportValve. (markt)
- 60446: Handle the case where the stored user credential uses a different key length than the length currently configured for the `CredentialHandler`. Based on a patch by Niklas Holm. (markt)
- Update the warnings that reference required options for running on Java 9 to use the latest syntax for those options. (markt)
- 60513: Fix thread safety issue with RMI cleanup code. (remm)

#### Coyote

- Expand the search process for a server certificate when OpenSSL is used with a JSSE connector and an explicit alias has not been configured. (markt)
- Extract the common Acceptor code from each Endpoint into a new Acceptor class that is used by all Endpoints. (markt)
- 60450: Improve the selection algorithm for the default trust store type for a TLS Virtual Host. In particular, don't use `PKCS12` as a default trust store type. Better document how the default trust store type is selected for a TLS virtual host. (markt)
- 60451: Correctly handle HTTP/2 header values that contain characters with unicode code points in the range 128 to 255. Reject with a clear error message HTTP/2 header values that contain characters with unicode code points above 255. (markt)
- Improve the logic that selects an address to use to unlock the Acceptor to take account of platforms what do not listen on all local addresses when configured with an address of `0.0.0.0` or `::`. (markt)
- Correct a regression in the refactoring to make wider use of `ByteBuffer` that caused an intermittent failure in the unit tests. (markt)
- 60482: HTTP/2 shouldn't do URL decoding on the query string. (remm)
- Fix an HTTP/2 compression error. Once a new size has been agreed for the dynamic HPACK table, the next header block must begin with a dynamic table update. (markt)
- 60508: Set request start time for HTTP/2. (remm)
- The default output buffer size for AJP connectors is now based on the configured AJP packet size rather than the minimum permitted AJP packet size. (markt)

#### Jasper

- Implement a simpler JSP file encoding detector that delegates XML prolog encoding detection to the JRE rather than using a custom XML parser. (markt)
- 60497: Restore previous tag reuse behavior following the use of try/finally. (remm)
- Improve the error handling for simple tags to ensure that the tag is released and destroyed once used. (remm)

#### WebSocket

- Correctly handle blocking WebSocket writes when the write times out just before the write is attempted. (markt)

#### Web Applications

- 60344: Add a note to BUILDING.txt regarding using the source bundle with the correct line endings. (markt)
- 60467: remove problematic characters from XML documentation. Based upon a patch by Michael Osipov. (schultz)
- In the documentation web application, be explicit that clustering requires a secure network for all of the cluster network traffic. (markt)
- Update the ASF logos to the new versions.
- 60468: Correct the format of the sample ISO-8601 date used to report the build date for the documentation. Patch provided by Michael Osipov. (markt)

#### Other

- Update the ASF logos used in the Apache Tomcat installer for Windows to use the new versions.

### 2016-12-08 Tomcat 9.0.0.M15 (markt)

#### Other

- Increment version due a local build configuration error with 9.0.0.M14 that wasn't caught until after digital signing had been completed Signing requires unique names so a new tag was required. (markt)

### not released Tomcat 9.0.0.M14 (markt)

#### Catalina

- 60202: Add an available flag to realms, to indicate the state, or the realm backend. Update lockout realm to only register auth failures if the realm is available. (remm)
- 60340: Readability improvements for CSS used in DefaultServlet and ErrorReportValve. Patch provided by Michael Osipov. (violetagg)
- 60351: Delay creating `META-INF/war-tracker` file until after the WAR has been expanded to address the case where the Tomcat process terminates during the expansion. (markt)
- Correctly generate URLs for resources located inside JARs that are themselves located inside a packed WAR file. (markt)
- Correctly handle the `configClass` attribute of a Host when embedding Tomcat. (markt)
- 60368: Stop creating a default connector on start in embedded mode. (remm)
- 60379: Dispose of the GSS credential once it is no longer required. Patch provided by Michael Osipov. (markt)
- 60380: Ensure that a call to `HttpServletRequest#logout()` triggers a call to `TomcatPrincipal#logout()`. Based on a patch by Michael Osipov. (markt)
- 60381: Provide a standard `toString()` implementation for components that implement `Contained`. (markt)
- 60387: Correct the javadoc for `o.a.catalina.AccessLog.setRequestAttributesEnabled`. The default value is different for the different implementations. (violetagg)
- 60393: Use consistent parameter naming in implementations of `Realm#authenticate(GSSContext, boolean)`. (markt)
- Refactor the `org.apache.naming` package to reduce duplicate code. Duplicate code identified by the Simian tool. (markt)
- Refactor the implementations of `HttpServletRequest#getRequestURL()` to reduce duplicate code. Duplicate code identified by the Simian tool. (markt)
- Refactor Catalina interfaces to make wider use of the `Contained` interface and reduce duplication. (markt)
- Remove the `getName()` method from `RealmBase` along with the various constants used by the sub-classes to store the return value. (markt)
- 60395: Log when an `Authenticator` passes an incomplete `GSSContext` to a Realm since it indicates a bug in the `Authenticator`. Patch provided by Michael Osipov. (markt)
- 60400: When expanding the buffer used for reading the request body, ensure the read position will be restored to the original one. (violetagg)
- Refactor the MBean implementations for the internal Tomcat components to reduce code duplication. (markt)
- 60410: Ensure that multiple calls to `JarInputStreamWrapper#close()` do not incorrectly trigger the closure of the underlying JAR or WAR file. (markt)
- 60411: Implement support in the `RewriteValve` for symbolic names to specify the redirect code to use when returning a redirect response to the user agent. Patch provided by Michael Osipov. (markt)
- 60413: In the `RewriteValve` write empty capture groups as the empty string rather than as `"null"` when generating the re-written URL. Based on a patch by Michael Osipov. (markt)

#### Coyote

- 60372: Ensure the response headers' buffer limit is reset to the capacity of this buffer when IOException occurs while writing the headers to the socket. (violetagg)
- Ensure that the availability of configured upgrade protocols that require ALPN is correctly reported during Tomcat start. (markt)
- 60386: Implement a more sophisticated pruning algorithm for removing closed streams from the priority tree to ensure that the tree does not grow too large. (markt)
- 60409: When unable to complete sendfile request, ensure the Processor will be added to the cache only once. (markt/violetagg)
- Ensure that the endpoint is able to unlock the acceptor thread during shutdown if the endpoint is configured to listen to any local address of a specific type such as `0.0.0.0` or `::`. (markt)
- Add a new configuration option, `ipv6v6only` to the APR connectors that allows them to be configure to only accept IPv6 connections when configured with an IPv6 address rather than the default which is to accept IPv4 connections as well if the operating system uses a dual network stack. (markt)
- Improve the logic that unlocks the acceptor thread so a better choice is made for the address to connect to when a connector is configured for any local port. This reduces the likelihood of the unlock failing. (markt)
- 60436: Avoid a potential NPE when processing async timeouts. (markt)
- Reduce the window in which an async request that has just started processing on a container thread remains eligible for an async timeout. (markt)

#### Jasper

- 60431: Improve handling of varargs in UEL expressions. Based on a patch by Ben Wolfe. (markt)

#### Web applications

- Correct a typo in Host Configuration Reference. Issue reported via comments.apache.org. (violetagg)
- 60412: Add information on the comment syntax for the `RewriteValve` configuration. (markt)

#### Tribes

- Reduce the warning logs for a message received from a different domain in order to avoid excessive log outputs. (kfujino)

#### WebSocket

- 60437: Avoid possible handshake overflows in the websocket client. (remm)

#### jdbc-pool

- 58816: Implement the statistics of jdbc-pool. The stats infos are `borrowedCount`, `returnedCount`, `createdCount`, `releasedCount`, `reconnectedCount`, `releasedIdleCount` and `removeAbandonedCount`. (kfujino)
- 60194: If `validationQuery` is not specified, connection validation is done by calling the `isValid()` method. (kfujino)
- 60398: Fix testcase of `TestSlowQueryReport`. (kfujino)

#### Other

- Allow customization of service.bat, such as heap memory size, service startup mode and JVM args. Patch provided by isapir via Github. (violetagg)
- 60366: Change `catalina.bat` to use directly `LOGGING_MANAGER` and `LOGGING_CONFIG` variables in order to configure logging, instead of modifying `JAVA_OPTS`. Patch provided by Petter Isberg. (violetagg)
- 60383: JASPIC API is added as a dependency to the `org.apache.tomcat:tomcat-catalina` maven artifact. (violetagg)
- Update the comments associated with the TLS Connector examples in `server.xml`. (markt)
- New property is added `test.verbose` in order to control whether the output of the tests is displayed on the console or not. Patch provided by Emmanuel Bourg. (violetagg)
- `TestOpenSSLCipherConfigurationParser.testSpecification` - if there are test failures, provide more detailed information. Patch provided by Emmanuel Bourg. (violetagg)

### 2016-11-08 Tomcat 9.0.0.M13 (markt)

#### Coyote

- Check that threadPriority values used in AbstractProtocol are valid. (fschumacher)

### not released Tomcat 9.0.0.M12 (markt)

#### Catalina

- When creating a new Connector via JMX, ensure that both HTTP/1.1 and AJP/1.3 connectors can be created. (markt)
- Reduce multiple error messages when Connector fails to instantiate the associated ProtocolHandler. (markt)
- 60152: Provide an option for Connector Lifecycle exceptions to be re-thrown rather than logged. This is controlled by the new `throwOnFailure` attribute of the Connector. (markt)
- Include the Context name in the log message when an item cannot be added to the cache. (markt)
- Exclude JAR files in `/WEB-INF/lib` from the static resource cache. (markt)
- When calling `getResourceAsStream()` on a directory, ensure that `null` is returned. (markt)
- 60161: Allow creating subcategories of the container logger, and use it for the rewrite valve. (remm)
- Correctly test for control characters when reading the provided shutdown password. (markt)
- 60297: Simplify connector creation in embedded mode. (remm)
- Refactor creation of containers in embedded mode for more consistency and flexibility. (remm)
- Log a warning if running on Java 9 with the ThreadLocal memory leak detection enabled (the default) but without the command line option it now requires. (markt)
- When a Connector is configured to use an executor, ensure that the StoreConfig component includes the executor name when writing the Connector configuration. (markt)
- When configuring the JMX remote listener, specify the allowed types for the credentials. (markt)

#### Coyote

- Correct the HPACK header table size configuration that transposed the client and server table sizes when creating the encoder and decoder. (markt)
- Review HTTP/2 implementation removing unused code, reducing visibility where possible and using final where appropriate. (markt)
- Don't continue to process an HTTP/2 stream if it is reset during header parsing. (markt)
- HTTP/2 uses separate headers for each Cookie. As required by RFC 7540, merge these into a single Cookie header before processing continues. (markt)
- Align the HTTP/2 implementation with the HTTP/1.1 implementation and return a 500 response when an unhandled exception occurs during request processing. (markt)
- Correct the HTTP header parser so that DEL is not treated as a valid token character. (markt)
- Add checks around the handling of HTTP/2 pseudo headers. (markt)
- Add support for trailer headers to the HTTP/2 implementation. (markt)
- 60232: When processing headers for an HTTP/2 stream, ensure that the read buffer is large enough for the header being processed. (markt)
- Add configuration options to the HTTP/2 implementation to control the maximum number of headers allowed, the maximum size of headers allowed, the maximum number of trailer headers allowed, the maximum size of trailer headers allowed and the maximum number of cookies allowed. (markt)
- Correctly differentiate between sending and receiving a reset frame when tracking the state of an HTTP/2 stream. (markt)
- Remove the undocumented support for using the old Connector attribute names `backlog`, `soLinger` and `soTimeout` that were renamed several major versions ago. (markt)
- 60319: When using an Executor, disconnect it from the Connector attributes `maxThreads`, `minSpareThreads` and `threadPriority` to enable the configuration settings to be consistently reported. These Connector attributes will be reported as `-1` when an Executor is in use. The values used by the executor may be set and obtained via the Executor. (markt)
- If an I/O error occurs during async processing on a non-container thread, ensure that the `onError()` event is triggered. (markt)
- Improve detection of I/O errors during async processing on non-container threads and trigger async error handling when they are detected. (markt)
- Add additional checks for valid characters to the HTTP request line parsing so invalid request lines are rejected sooner. (markt)

#### Jasper

- Update to the Eclipse JDT Compiler 4.6.1. (markt)

#### Web applications

- Add HTTP/2 configuration information to the documentation web application. (markt)
- Fix default value of `validationInterval` attribute in jdbc-pool. (kfujino)
- Correct a typo in CGI How-To. Issue reported via comments.apache.org. (violetagg)

#### Tribes

- When the proxy node sends a backup retrieve message, ensure that using the `channelSendOptions` that has been set rather than the default `channelSendOptions`. (kfujino)

#### Other

- Add the JASPIC API jar to the Maven Central publication script. (markt)
- Remove classes from tomcat-util-scan.jar that are duplicates of those in tomcat-util.jar. (markt)
- Update the NSIS Installer used to build the Windows installer to version 3.0. (markt)

### 2016-10-10 Tomcat 9.0.0.M11 (markt)

#### Catalina

- 59961: Add an option to the `StandardJarScanner` to control whether or not JAR Manifests are scanned for additional class path entries. (markt)
- 60013: Refactor the previous fix to align the behaviour of the Rewrite Valve with mod_rewrite. As part of this, provide an implementation for the `B` and `NE` flags and improve the handling for the `QSA` flag. Includes multiple test cases by Santhana Preethiand a patch by Tiago Oliveira. (markt)
- 60087: Refactor the web resources handling to use the Tomcat specific `war:file:...` URL protocol to refer to WAR files and their contents rather than the standard `jar:file:...` form since some components of the JRE, such as JAR verification, give unexpected results when the standard form is used. A side-effect of the refactoring is that when using packed WARs, it is now possible to reference a WAR and/or specific JARs within a WAR in the security policy file used when running under a `SecurityManager`. (markt)
- 60116: Fix a problem with the rewrite valve that caused back references evaluated in conditions to be forced to lower case when using the `NC` flag. (markt)
- Ensure `Digester.useContextClassLoader` is considered in case the class loader is used. (violetagg)
- 60117: Ensure that the name of `LogLevel` is localized when using `OneLineFormatter`. Patch provided by Tatsuya Bessho. (kfujino)
- 60138: Fix the `SSLHostConfig` so that the `protocols` attribute is limited to the protocols supported by the current JSSE implementation rather than the default protocols used by the implementation. (markt)
- 60146: Improve performance for resource retrieval by making calls to WebResource.getInputStream() trigger caching if the resource is small enough. Patch provided by mohitchugh. (markt)
- 60151: Improve the exception error messages when a `ResourceLink` fails to specify the type, specifies an unknown type or specifies the wrong type. (markt)
- 60167: Ignore empty lines in `/etc/passwd` files when using the `PasswdUserDatabase`. (markt)
- 60170: Exclude the compressed test file `index.html.br` from RAT analysis. Patch provided by Gavin McDonald. (markt)
- When starting web resources, ensure that class resources are only started once. (markt)
- Improve the access checks for linked global resources to handle the case where the current class loader is a child of the web application class loader. (markt)
- 60196: Ensure that the `isMandatory` flag is correctly set when using JASPIC authentication. (markt)
- 60199: Log a warning if deserialization issues prevent a session attribute from being loaded. (markt)
- 60208: When using RFC6265 compliant cookies, the `/` character should not be allowed in a cookie name since the RFC6265 will drop such cookies as invalid. (markt)
- Introduce new methods `read(ByteBuffer)`/ `write(ByteBuffer)` in `o.a.catalina.connector.CoyoteInputStream`/ `o.a.catalina.connector.CoyoteOutputStream`. (violetagg)

#### Coyote

- Refactor the code that implements the requirement that a call to `complete()` or `dispatch()` made from a non-container thread before the container initiated thread that called `startAsync()` completes must be delayed until the container initiated thread has completed. Rather than implementing this by blocking the non-container thread, extend the internal state machine to track this. This removes the possibility that blocking the non-container thread could trigger a deadlock. (markt)
- Fail earlier if the client closes the connection during SNI processing. (markt)
- 60123: Avoid potential threading issues that could cause excessively large values to be returned for the processing time of a current request. (markt)
- 60174: Log instances of `HeadersTooLargeException` during request processing. (markt)
- 60173: Allow up to 64kB HTTP/2 header table size limit. (remm)
- Java 9 compatibility of direct ByteBuffer cleaner. (remm)

#### Jasper

- 60101: Remove preloading of the class that was deleted. (violetagg)

#### Web applications

- Expand the documentation for the nested elements within a `Resources` element to clarify the behaviour of different configuration options with respect to the order in which resources are searched. (markt)
- Add an example of using the `classesToInitialize` attribute of the `JreMemoryLeakPreventionListener` to the documentation web application. Based on a patch by Cris Berneburg. (markt)
- 60192: Correct a typo in the status output of the Manager application. Patch provided by Radhakrishna Pemmasani. (markt)

#### jdbc-pool

- Notify jmx when returning the connection that has been marked suspect. (kfujino)
- Ensure that the `POOL_EMPTY` notification has been added to the jmx notification types. (kfujino)
- 60099: Ensure that use all method arguments as a cache key when using `StatementCache`. (kfujino)

#### Other

- Update the download location for Objenesis. (violetagg)
- 60164: Replace `log4j-core*.jar` with `log4j-web*.jar` since it is `log4j-web*.jar` that contains the `ServletContainerInitializer`. (markt)
- Add documentation to the bin/catalina.bat script to remind users that environment variables don't affect the configuration of Tomcat when run as a Windows Service. Based upon a documentation patch by James H.H. Lampert. (schultz)
- Update the packaged version of the Tomcat Native Library to 1.2.10 to pick up the latest Windows binaries built with OpenSSL 1.0.2j. (markt)

### 2016-09-05 Tomcat 9.0.0.M10 (markt)

#### Catalina

- 59813: Ensure that circular relations of the Class-Path attribute from JAR manifests will be processed correctly. (violetagg)
- Ensure that reading the `singleThreadModel` attribute of a `StandardWrapper` via JMX does not trigger initialisation of the associated servlet. With some frameworks this can trigger an unexpected initialisation thread and if initialisation is not thread-safe the initialisation can then fail. (markt)
- Compatibility with rewrite from httpd for non existing headers. (jfclere)
- By default, treat paths used to obtain a request dispatcher as encoded. This behaviour can be changed per web application via the `dispatchersUseEncodedPaths` attribute of the Context. (markt)
- Provide a mechanism that enables the container to check if a component (typically a web application) has been granted a given permission when running under a SecurityManager without the current execution stack having to have passed through the component. Use this new mechanism to extend SecurityManager protection to the system property replacement feature of the digester. (markt)
- When retrieving an object via a `ResourceLink`, ensure that the object obtained is of the expected type. (markt)
- 59823: Ensure that JASPIC configuration is taken into account when calling `HttpServletRequest.authenticate()`. (markt)
- 59824: Mark the `RewriteValve` as supporting async processing by default. (markt)
- 59839: Apply `roleSearchAsUser` to all nested searches in JNDIRealm. (fschumacher)
- 59859: Fix resource leak in WebDAV servlet. Based on patch by Coty Sutherland. (fschumacher)
- 59862: Allow nested jar files scanning to be filtered with the system property `tomcat.util.scan.StandardJarScanFilter.jarsToSkip`. Patch is provided by Terence Bandoian. (violetagg)
- 59866: When scanning `WEB-INF/classes` for annotations, don't scan the contents of `WEB-INF/classes/META-INF` (if present) since classes will never be loaded from that location. (markt)
- 59888: Correctly handle tabs and spaces in quoted version one cookies when using the `Rfc6265CookieProcessor`. (markt)
- A number of the JRE memory leaks addressed by the `JreMemoryLeakPreventionListener` have been fixed in Java 9 so the associated protection is now disabled when running on Java 9 onwards. (markt)
- 59912: Fix an edge case in input stream handling where an `IOException` could be thrown when reading a POST body. (markt)
- 59913: Correct a regression introduced with the support for the Servlet 4 `HttpServletRequest.getMapping()` API that caused the attributes for forwarded requests to be lost if requested from within a subsequent include. (markt)
- 59966: Do not start the web application if the error page configuration in web.xml is invalid. (markt)
- Switch the CGI servlet to the standard logging mechanism and remove support for the debug attribute. (markt)
- 60012: Improvements in the log messages. Based on suggestions by Nemo Chen. (violetagg)
- Changes to the `allowLinking` attribute of a `StandardRoot` instance now invalidate the cache if caching is enabled. (markt)
- Add a new initialisation parameter, `envHttpHeaders`, to the CGI Servlet to mitigate httpoxy (CVE-2016-5388) by default and to provide a mechanism that can be used to mitigate any future, similar issues. (markt)
- When adding and removing `ResourceLink`s dynamically, ensure that the global resource is only visible via the `ResourceLinkFactory` when it is meant to be. (markt)
- 60008: When processing CORs requests, treat any origin with a URI scheme of `file` as a valid origin. (markt)
- Improve handling of exceptions during a Lifecycle events triggered by a state transition. The exception is now caught and the component is now placed into the `FAILED` state. (markt)
- 60013: Fix encoding issues when using the RewriteValve with UTF-8 query strings or UTF-8 redirect URLs. (markt)
- 60022: Improve handling when a WAR file and/or the associated exploded directory are symlinked into the `appBase`. (markt)
- Fix a file descriptor leak when reading the global web.xml. (markt)
- Consistently decode URL patterns provided via web.xml using the encoding of the web.xml file where specified or UTF-8 where no explicit encoding is specified. (markt)
- Make timing attacks against the Realm implementations harder. (schultz)

#### Coyote

- Correct a regression in refactoring to enable injection of custom keystores that broke the automatic conversion of OpenSSL style PEM key and certificate files for use with JSSE TLS connectors. (markt)
- 59910: Don't hardcode key alias value to "tomcat" for JSSE. When using a keystore, OpenSSL will still default to it. (remm)
- 59904: Add a limit (default 200) for the number of cookies allowed per request. Based on a patch by gehui. (markt)
- 59925: Correct regression in r1628368 and ensure that HTTP separators are handled as configured in the `LegacyCookieProcessor`. Patch provided by Kyohei Nakamura. (markt)
- 59950: Correct log message when reporting that the current number of HTTP/2 streams for a connection could not be pruned to below the limit. (markt)
- Ensure that `Semaphore.release` is called in all cases. Even when there is an exception. (violetagg)
- 60030: Correct a potential infinite loop in the SNI parsing code triggered by failing to handle an end of stream condition. (markt)
- Refactor the JSSE client certificate validation so that the effectiveness of the `certificateVerificationDepth` configuration attribute does not depend on the presence of a certificate revocation list. (markt)
- Small logging optimization in the `Rfc6265CookieProcessor`. Patch provided by Svetlin Zarev. (markt)
- OpenSSL now disables 3DES by default so reflect this when using OpenSSL syntax to select ciphers. (markt)
- Use the proper ERROR socket status code for async errors with NIO2. (remm)
- 60035: Fix a potential connection leak if the client drops a TLS connection before the handshake completes. (markt)
- Log a warning at start up if a JSSE TLS connector is configured with a trusted certificate that is either not yet valid or has expired. (markt)

#### Jasper

- When writing out a full web.xml file with JspC ensure that the encoding used in the XML prolog matches the encoding used to write the contents of the file. (markt)
- Improve the error handling for custom tags to ensure that the tag is returned to the pool or released and destroyed once used. (markt)
- 60032: Fix handling of method calls that use varargs within EL value expressions. (markt)
- Ignore `engineOptionsClass` and `scratchdir` when running under a security manager. (markt)
- Fixed StringIndexOutOfBoundsException. Based on a patch provided by wuwen via Github. (violetagg)

#### WebSocket

- 59908: Ensure that a reason phrase is included in the close message if a session is closed due to a timeout. (markt)

#### Web applications

- 59867: Correct the documentation provided by Manager's 403.jsp. (violetagg)
- 59868: Clarify the documentation for the Manager web application to make clearer that the host name and IP address in the server section are the primary host name and IP address. (markt)
- 59940: Correct the name of the `truststorePassword` attribute of the `SSLHostConfig` element in the configuration documentation. (markt)
- MBeans Descriptors How-To is moved to `mbeans-descriptors-howto.html`. Patch provided by Radoslav Husar. (violetagg)
- Update NIO Connector configuration documentation with an information about `socket.directSslBuffer`. (violetagg)
- 60034: Correct a typo in the Manager How-To page of the documentation web application. (markt)
- Correct the name of the CRL location configuration attributes in the documentation web application. (markt)

#### jdbc-pool

- In order to avoid the unintended skip of `PoolCleaner`, remove the check code of the execution interval in the task that has been scheduled. (kfujino)
- 59850: Ensure that the `ResultSet` is closed when enabling the `StatementCache` interceptor. (kfujino)
- 59923: Reduce the default value of `validationInterval` in order to avoid the potential issue that continues to return an invalid connection after database restart. (kfujino)
- Ensure that the `ResultSet` is returned as Proxy object when enabling the `StatementDecoratorInterceptor`. (kfujino)
- 60043: Ensure that the `suspectTimeout` works without removing connection when the `removeAbandoned` is disabled. (kfujino)
- Add log message of when returning the connection that has been marked suspect. (kfujino)
- Correct Javadoc for `ConnectionPool.suspect()`. Based on a patch by Yahya Cahyadi. (markt)

#### Other

- 59871: Add a property (`timeFormat`) to JULI's `OneLineFormatter` to enable the format of the time stamp used in log messages to be configured. (markt)
- 59899: Update Tomcat's copy of the Java Persistence annotations to include the changes made in 2.1 / JavaEE 7. (markt)
- Fixed typos in mbeans-descriptors.xml files. (violetagg)
- Update the internal fork of Commons BCEL to r1757132 to align with the BCEL 6 release. (markt)
- Update the internal fork of Commons DBCP 2 to r1757164 to pick up a couple of bug fixes. (markt)
- Update the internal fork of Commons Codec to r1757174. Code formatting changes only. (markt)
- Update the internal fork of Commons FileUpload to afdedc9. This pulls in a fix to improve the performance with large multipart boundaries. (markt)

### 2016-07-12 Tomcat 9.0.0.M9 (markt)

#### Catalina

- 18500: Add limited support for wildcard host names and host aliases. Names of the form `*.domainname` are now permitted. Note that an exact host name match takes precedence over a wild card host name match. (markt)
- 57705: Add debug logging for requests denied by the remote host and remote address valves and filters. Based on a patch by Graham Leggett. (markt)
- Correct a regression in the fix for 58588 that removed the entire `org.apache.juli` package from the embedded JARs rendering them unusable. (markt)
- 59399: Add a new option to the Realm implementations that ship with Tomcat that allows the HTTP status code used for HTTP -> HTTPS redirects to be controlled per Realm. (markt)
- 59708: Modify the LockOutRealm logic. Valid authentication attempts during the lock out period will no longer reset the lock out timer to zero. (markt)
- Change the default of the `sessionCookiePathUsesTrailingSlash` attribute of the `Context` element to `false` since the problems caused when a Servlet is mapped to `/*` are more significant than the security risk of not enabling this option by default. (markt)
- Follow-up to 59655. Improve the documentation for configuring permitted cookie names. Patch provided by Kyohei Nakamura. (markt)
- Do not attempt to start web resources during a web application's initialisation phase since the web application is not fully configured at that point and the web resources may not be correctly configured. (markt)
- Improve error handling around user code prior to calling `InstanceManager.destroy()` to ensure that the method is executed. (markt)

#### Coyote

- Fix a cause of multiple attempts to close the same socket. (markt)
- Refactor the certificate keystore and trust store generation to make it easier for embedded users to inject their own key stores. (markt)
- Add a `maxConcurrentStreamExecution` on the HTTP/2 protocol handler to allow restricting the amount of concurrent stream that are being executed in a single connection. The default is to not limit it. (remm)
- 59233: Add the ability to add TLS virtual hosts dynamically. (markt)
- Correct a problem with `ServletRequest.getServerPort()` for secure HTTP/2 connections that meant an incorrect value was returned when using the default port. (markt)
- Improve error handling around user code prior to calling `InstanceManager.destroy()` to ensure that the method is executed. (markt)
- Document the default for the HTTP/2 configuration parameter `maxConcurrentStreamExecution` as 20. (markt)

#### Jasper

- Improve error handling around user code prior to calling `InstanceManager.destroy()` to ensure that the method is executed. (markt)

#### WebSocket

- Now the WebSocket implementation is not built directly on top of the Servlet API and can use Tomcat internals, there is no need for the dedicated WebSocket Executor. It has been replaced by the use of the Connector/Endpoint provided Executor. (markt)
- Improve error handling around user code prior to calling `InstanceManager.destroy()` to ensure that the method is executed. (markt)

#### Web Applications

- Do not log an additional case of `IOException`s in the error handler for the Drawboard WebSocket example when the root cause is the client disconnecting since the logs add no value. (markt)
- 59642: Mention the `localDataSource` in the `DataSourceRealm` section of the Realm How-To. (markt)
- 59672: Update the security considerations page of the documentation web application to take account of the fact that the Manager and HostManager applications now have a `RemoteAddrValve` configured by default. (markt)
- Follow-up to the fix for 59399. Ensure that the new attribute `transportGuaranteeRedirectStatus` is documented for all Realms. Also document the `NullRealm` and when it is automatically created for an Engine. (markt)
- Fix the description of `maxAge` attribute in jdbc-pool doc. This attribute works both when a connection is returned and when a connection is borrowed. (kfujino)
- 59774: Correct the `prefix` values in the documented examples for configuring the `AccessLogValve`. Patch provided by Mike Noordermeer. (markt)

#### Tribes

- Add log message when the ping has timed-out. (kfujino)
- If the ping message has been received at the `AbstractReplicatedMap#leftOver` method, ensure that notify the member is alive than ignore it. (kfujino)

#### jdbc-pool

- Fix the duplicated connection release when connection verification failed. (kfujino)
- Ensure that do not remove the abandoned connection that has been already released. (kfujino)

#### Other

- Remove JULI plus log4j extras and embedded artifacts from Maven release script. (markt)
- Use the mirror network rather than the ASF master site to download the current ASF dependencies. (markt)
- Update the packaged version of the Tomcat Native Library to 1.2.8 to pick up the latest fixes and make 1.2.8 the minimum recommended version. (markt)

### 2016-06-13 Tomcat 9.0.0.M8 (markt)

#### Coyote

- Remove accidentally committed debug code. (markt)

### not released Tomcat 9.0.0.M7 (markt)

#### Catalina

- RMI Target related memory leaks are avoidable which makes them an application bug that needs to be fixed rather than a JRE bug to work around. Therefore, start logging RMI Target related memory leaks on web application stop. Add an option that controls if the check for these leaks is made. Log a warning if running on Java 9 with this check enabled but without the command line option it requires. (markt)
- Ensure NPE will not be thrown during deployment when scanning jar files without MANIFEST.MF file. (violetagg)
- Remove the `clearReferencesStatic` option from `StandardContext`. It was known to cause problems with some libraries (such as log4j) and was only linked to suspected memory leaks rather than known memory leaks. It had been disabled by default with no increase in the reports of memory leaks for some time. (markt)
- 59604: Correct the assumption made in the URL decoding that the default platform encoding is always compatible with ISO-8859-1. This assumption is not always valid, e.g. on z/OS. (markt)
- 59608: Skip over any invalid `Class-Path` attribute from JAR manifests. Log errors at debug level due to many bad libraries. (remm)
- Fix error message when failed to register MBean. (kfujino)
- 59655: Configure the cookie name validation to use RFC6265 rules by default to align it with the default cookie parser. Document the impact system properties have on cookie name validation. (mark)

#### Coyote

- Ensure that requests with HTTP method names that are not tokens (as required by RFC 7231) are rejected with a 400 response. (markt)
- When an asynchronous request is processed by the AJP connector, ensure that request processing has fully completed before starting the next request. (markt)
- Improve handling of HTTP/2 stream resets. (markt)
- 58750: The HTTP Server header is no longer set by default. A Server header may be configured by setting the `server` attribute on the `Connector`. A new `Connector` attribute, `serverRemoveAppProvidedValues` may be used to remove any Server header set by a web application. (markt)
- 59564: Correct offset when reading into HTTP/2 input buffer that could cause problems reading request bodies. (violetagg/markt)
- Modify the handling of read/write timeouts so that the appropriate error handling (`ReadListener.onError()`, `WriteListener.onError()` or `AsyncListener.onError()`) is called. (markt)
- If an async dispatch results in the completion of request processing, ensure that any remaining request body is swallowed before starting the processing of the next request else the remaining body may be read as the start of the next request leading to a 400 response. (markt)

#### Jasper

- 59567: Fix NPE scanning webapps for TLDs when an exploded JAR has an empty WEB-INF/classes/META-INF folder. (remm)
- Fix a memory leak in the expression language implementation that caused the class loader of the first web application to use expressions to be pinned in memory. (markt)
- 59654: Improve error message when attempting to use a TLD file from an invalid location. Patch provided by Huxing Zhang. (markt)

#### WebSocket

- 59659: Fix possible memory leak in WebSocket handling of unexpected client disconnects. (markt)

#### Web applications

- 58891: Update the SSL How-To. Based on a suggestion by Alexander Kjäll. (markt)

#### Extras

- 58588: Remove the JULI extras package from the distribution. It was only useful for switching Tomcat's internal logging to log4j 1.2.x and that version of log4j is no longer supported. No additional Tomcat code is required if switching Tomcat's internal logging to log via log4j 2.x. (markt)

#### jdbc-pool

- Fix a memory leak with the pool cleaner thread that retained a reference to the web application class loader for the first web application to use a connection pool. (markt)

#### Other

- Update the internal fork of Commons DBCP 2 to r1743696 (2.1.1 plus additional fixes). (markt)
- Update the internal fork of Commons Pool 2 to r1743697 (2.4.2 plus additional fixes). (markt)
- Update the internal fork of Commons File Upload to r1743698 (1.3.1 plus additional fixes). (markt)
- Use UTF-8 with a standard prolog for all XML files. (markt)
- 58626: Add support for a new environment variable (`USE_NOHUP`) that causes `nohup` to be used when starting Tomcat. It is disabled by default except on HP-UX where it is enabled by default since it is required when starting Tomcat at boot on HP-UX. (markt)

### 2016-05-16 Tomcat 9.0.0.M6 (markt)

#### Catalina

- Ensure that annotated web components packed in web fragments will be processed when `unpackWARs` is enabled. (violetagg)

### not released Tomcat 9.0.0.M5 (markt)

#### Catalina

- 48922: Apply a very small performance improvement to the date formatting in Tomcat's internal request object. Based on a patch provided by Ondrej Medek. (markt)
- 59206: Ensure NPE will not be thrown by `o.a.tomcat.util.file.ConfigFileLoader` when `catalina.base` is not specified. (violetagg)
- 59217: Remove duplication in the recycling of the path in `o.a.tomcat.util.http.ServerCookie`. Patch is provided by Kyohei Nakamura. (violetagg)
- Fixed possible NPE in `o.a.catalina.loader.WebappClassLoaderBase.getResourceAsStream` (violetagg)
- 59213: Async dispatches should be based off a wrapped request. (remm)
- Ensure that `javax.servlet.ServletRequest` and `javax.servlet.ServletResponse` provided during `javax.servlet.AsyncListener` registration are made available via `javax.servlet.AsyncEvent.getSuppliedRequest` and `javax.servlet.AsyncEvent.getSuppliedResponse` (violetagg)
- 59219: Ensure `AsyncListener.onError()` is called if an `Exception` is thrown during async processing. (markt)
- 59220: Ensure that `AsyncListener.onComplete()` is called if the async request times out and the response is already committed. (markt)
- 59226: Process the `Class-Path` attribute from JAR manifests for JARs on the class path excluding JARs packaged in `WEB-INF/lib`. (markt)
- 59255: Fix possible NPE in mapper. (kkolinko/remm)
- 59256: `slf4j-taglib*.jar` should not be excluded from the standard JAR scanning by default. (violetagg)
- Clarify the log message that specifying both urlPatterns and value attributes in @WebServlet and @WebFilter annotations is not allowed. (violetagg)
- Ensure the exceptions caused by Valves will be available in the log files so that they can be evaluated when `o.a.catalina.valves.ErrorReportValve.showReport` is disabled. Patch is provided by Svetlin Zarev. (violetagg)
- Remove unused `distributable` attribute that is defined as `TransientAttribute` of `Manager` in StoreConfig. (kfujino)
- Fix handling of Cluster Receiver in StoreConfig. The `bind` and `host` attributes define as `TransientAttribute`. (kfujino)
- 59261: `ServletRequest.getAsyncContext()` now throws an `IllegalStateException` as required by the Servlet specification if the request is not in asynchronous mode when called. (markt)
- 59269: Correct the implementation of `PersistentManagerBase` so that `minIdleSwap` functions as designed and sessions are swapped out to keep the active session count below `maxActiveSessions`. (markt)
- Update the implementation of the proposed Servlet 4.0 API to provide mapping type information for the current request to reflect discussions within the EG. (markt)
- Correctly configure the base path for a resources directory provided by an expanded JAR file. Patch provided by hengyunabc. (markt)
- When multiple compressed formats are available and the client does not express a preference, use the server order to determine the preferred format. Based on a patch by gmokki. (markt)
- 59284: Allow the Tomcat provided JASPIC `SimpleServerAuthConfig` to pick up module configuration properties from either the property set passed to its constructor or from the properties passed in the call to `getAuthContext`. Based on a patch by Thomas Maslen. (markt)
- 59310: Do not add a `Content-Length: 0` header for custom responses to `HEAD` requests that do not set a `Content-Length` value. (markt)
- When normalizing paths, improve the handling when paths end with `/.` or `/..` and ensure that input and output are consistent with respect to whether or not they end with `/`. (markt)
- 59317: Ensure that `HttpServletRequest.getRequestURI()` returns an encoded URI rather than a decoded URI after a dispatch. (markt)
- Use the correct URL for the fragment when reporting errors processing a `web-fragment.xml` file from a JAR located in an unpacked WAR. (markt)
- Ensure that `JarScanner` only uses the explicit call-back to process `WEB-INF/classes` and only when configured to treat the contents of `WEB-INF/classes` as a possible exploded JAR. (markt)
- Remove the `java2DDisposerProtection` option from the `JreMemoryLeakPreventionListener`. The leak is fixed in Java 7 onwards and Tomcat 9 requires Java 8 so the option is unnecessary. (markt)
- Remove the `securityPolicyProtection` option from the `JreMemoryLeakPreventionListener`. The leak is fixed in Java 8 onwards and Tomcat 9 requires Java 8 so the option is unnecessary. (markt)
- Remove the `securityLoginConfigurationProtection` option from the `JreMemoryLeakPreventionListener`. The leak is fixed in Java 8 onwards and Tomcat 9 requires Java 8 so the option is unnecessary. (markt)
- Ensure that the value for the header `X-Frame-Options` is constructed correctly according to the specification when `ALLOW-FROM` option is used. (violetagg)
- Fix an `IllegalArgumentException` if the first use of an internal `Response` object requires JASPIC authentication. (markt)
- Do not trigger unnecessary session ID changes when using JASPIC and the user is authenticated using cached credentials. (markt)
- 59437: Ensure that the JASPIC `CallbackHandler` is thread-safe. (markt)
- 59449: In `ContainerBase`, ensure that the process to remove a child container is the reverse of the process to add one. Patch provided by Huxing Zhang. (markt)

#### Coyote

- Improves OpenSSL engine robustness when SSL allocation fails for some reason. (remm)
- OpenSSL engine code cleanups. (remm)
- Align cipher configuration parsing with current OpenSSL master. (markt)
- Change the default for `honorCipherOrder` to `false`. With the current default TLS configuration, it is no longer necessary for this to be `true` for a reasonably secure configuration. (markt)
- Add a new environment variable `JSSE_OPTS` that is intended to be used to pass JVM wide configuration to the JSSE implementation. The default value is `-Djdk.tls.ephemeralDHKeySize=2048` which protects against weak Diffie-Hellman keys. (markt)
- 58970: Fix a connection counting bug in the NIO connector that meant some dropped connections were not removed from the current connection count. (markt)
- 59289: Do not recycle upgrade processors in unexpected close situations. (remm)
- 59295: Use `Locale.toLanguageTag()` to construct the `Content-Language` HTTP header to ensure the locale is correctly represented. Patch provided by zikfat. (markt)
- 59344: Add support for using pem encoded certificates with JSSE SSL. Submitted by Emmanuel Bourg with additional tweaks. (remm)
- Make the TLS certificate chain available to clients when using JSSE+OpenSSL with the certificate chain stored in a Java KeyStore. (markt)
- Work around a known issue in OpenSSL that does not permit the TLS handshake to be failed if the ALPN negotiation fails. (markt)
- 59421: Add direct HTTP/2 connection support. (remm)
- Correctly handle a call to `AsyncContext.complete()` from a non-container thread when non-blocking I/O is being used. (markt)
- 59451: Correct Javadoc for `MessageBytes`. Patch provided by Kyohei Nakamura. (markt)
- 59450: Correctly handle the case where the `LegacyCookieProcessor` is configured with `allowHttpSepsInV0` set to `false` and `forwardSlashIsSeparator` set to `true`. Patch provided by Kyohei Nakamura. (markt)

#### Jasper

- When scanning JARs for TLDs, correctly handle the (rare) case where a JAR has been exploded into `WEB-INF/classes` and the web application is deployed as a packed WAR. (markt)
- 59640: NPEs with not found TLDs. (remm)

#### WebSocket

- 59189: Explicitly release the native memory held by the `Inflater` and `Deflater` when using PerMessageDeflate and the WebSocket session ends. Based on a patch by Henrik Olsson. (markt)
- Restore the `WsServerContainer.doUpgrade()` method which was accidentally removed since it is not used by Tomcat. (markt)
- Fix a regression caused by the connector refactoring and ensure that the thread context class loader is set to the web application classloader when processing WebSocket messages on the server. (markt)
- Ensure that a client disconnection triggers the error handling for the associated WebSocket end point. (markt)
- Make WebSocket client more robust when handling errors during the close of a WebSocket session. (markt)

#### Web applications

- 59218: Correct the path to `jaspic-providers.xml` in Jaspic How-To. Patch is provided by Tatsuya Bessho. (violetagg)
- Remove button that has accidentally been added to the host manager. Submitted by Coty Sutherland. (remm)
- Update in the documentation the link to the maven repository where Tomcat snapshot artifacts are deployed. (markt/violetagg)
- Clarify in the documentation that calls to `ServletContext.log(String, Throwable)` or `GenericServlet.log(String, Throwable)` are logged at the SEVERE level. (violetagg)
- Correct a typo in SSL/TLS Configuration How-To. Issue reported via comments.apache.org. (violetagg)

#### Tribes

- Avoid NPE when a proxy node failed to retrieve a backup entry. (kfujino)
- Add the flag indicating that member is a localMember. (kfujino)
- Fix potential NPE that depends on the setting order of attributes of static member when using the static cluster. (kfujino)
- Add get/set method for the channel that is related to `ChannelInterceptor`. (kfujino)
- As with the multicast cluster environment, in the static cluster environment, the local member inherits properties from the cluster receiver. (kfujino)
- Add get/set method for the channel that is related to each Channel services. (kfujino)
- Add name to channel in order to identify channels. In tomcat cluster environment, it is set the cluster name + "-Channel" as default value. (kfujino)
- Add the channel name to the thread which is invoked by channel services in order to identify the associated channel. (kfujino)
- Ensure that clear the channel instance from channel services when stopping channel. (kfujino)
- Implement map state in the replication map. (kfujino)
- Ensure that the ping is not executed during the start/stop of the replication map. (kfujino)
- In ping processing in the replication map, send not the `INIT` message but the newly introduced `PING` message. (kfujino)

#### Other

- 59211: Add hamcrest to Eclipse classpath. Patch is provided by Huxing Zhang. (violetagg)
- 59276: Update optional Checkstyle library to 6.17. (kkolinko)
- 59280: Update the NSIS Installer used to build the Windows Installers to version 2.51. (kkolinko)
- Update the packaged version of the Tomcat Native Library to 1.2.7 to pick up the Windows binaries that are based on OpenSSL 1.0.2h and APR 1.5.2. (markt)

### 2016-03-16 Tomcat 9.0.0.M4 (markt)

#### Catalina

- Ensure that `/WEB-INF/classes` is never processed as a web fragment. (markt)
- Switch default connector when native is installed. Unless configured otherwise, the NIO endpoint will be used by default. If SSL is configured, OpenSSL will be used rather than JSSE. (remm)
- Correct a regression in the fix for 58867. When configuring a Context to use an external directory for the `docBase`, and that directory happens to be located along side the original WAR, use the directory as the `docBase` rather than expanding the WAR into the `appBase` and using the newly created expanded directory as the `docBase`. (markt)
- 58351: Make the server build date and server version number accessible via JMX. Patch provided by Huxing Zhang. (markt)
- 58988: Special characters in the substitutions for the RewriteValve can now be quoted with a backslash. (fschumacher)
- 58999: Fix class and resource name filtering in WebappClassLoader. It throws a StringIndexOutOfBoundsException if the name is exactly "org" or "javax". (rjung)
- Add JASPIC (JSR-196) support. (markt)
- Make checking for var and map replacement in RewriteValve a bit stricter and correct detection of colon in var replacement. (fschumacher)
- Refactor the web application class loader to reduce the impact of JAR scanning on the memory footprint of the web application. (markt)
- Fix some resource leaks in the error handling for accessing files from JARs and WARs. (markt)
- Refactor the JAR and JAR-in-WAR resource handling to reduce the memory footprint of the web application. (markt)
- Refactor the web.xml parsing so a new parser is created every time the web application starts rather than creating and caching the parser when the Context is created. This enables the parser to take account of modified Context configuration parameters and reduces (slightly) the memory footprint of a running Tomcat instance. (markt)
- Switch the web application class loader to the `ParallelWebappClassLoader` by default. (markt)
- 57809: Remove the custom context attribute that held the effective web.xml. Components needing access to configuration information may access it via the Servlet API. (markt)
- Refactor JAR scanning to reduce memory footprint. (markt)
- 59001: Correctly handle the case when Tomcat is installed on a path where one of the segments ends in an exclamation mark. (markt)
- Expand the fix for 59001 to cover the special sequences used in Tomcat's custom jar:war: URLs. (markt)
- 59043: Avoid warning while expiring sessions associated with a single sign on if `HttpServletRequest.logout()` is used. (markt)
- 59054: Ensure that using the `CrawlerSessionManagerValve` in a distributed environment does not trigger an error when the Valve registers itself in the session. (markt)
- Add socket properties support to storeconfig. (remm)
- Fix incorrect parsing of the NE and NC flags in rewrite rules. (remm)
- 59065: Correct the timing of the check for colons in paths on non-Windows systems implemented in `catalina.sh` so it works correctly with Cygwin. Patch provided by Ed Randall. (markt)
- When a Host is configured with an appBase that does not exist, create the appBase before trying to expand an external WAR file into it. (markt)
- 59115: When using the Servlet 3.0 file upload, the submitted file name may be provided as a token or a quoted-string. If a quoted-string, unquote the string before returning it to the user. (markt)
- 59123: Close `NamingEnumeration` objects used by the `JNDIRealm` once they are no longer required. (fschumacher/markt)
- Implement the proposed Servlet 4.0 API to provide mapping type information for the current request. (markt)
- 59138: Correct a false positive warning for ThreadLocal related memory leaks when the key class but not the value class has been loaded by the web application class loader. (markt)
- 59017: Make the pre-compressed file support in the Default Servlet generic so any compression may be used rather than just gzip. Patch provided by Mikko Tiihonen. (markt)
- 59145: Don't log an invalid warning when a user logs out of a session associated with SSO. (markt)
- 59150: Add an additional flag on APR listener to allow disabling automatic use of OpenSSL. (remm)
- 59151: Fix a regression in the fix for 56917 that added additional (and arguably unnecessary) validation to the provided redirect location. (markt)
- 59154: Fix a `NullPointerException` in the `JAASMemoryLoginModule` resulting from the introduction of the `CredentialHandler` to `Realm`s. (schultz/markt)

#### Coyote

- Handle the case in the NIO2 connector where the required TLS buffer sizes increase after the connection has been initiated. (markt/remm)
- Bad processing of handshake errors in NIO2. (remm)
- Use JSSE session configuration options with OpenSSL. (remm)
- 59015: Fix potential cause of endless APR Poller loop during shutdown if the Poller experiences an error during the shutdown process. (markt)
- Align cipher aliases for `kECDHE` and `ECDHE` with the current OpenSSL implementation. (markt)
- 59081: Retain the user defined cipher order when defining ciphers. (markt)
- 59089: Correctly ignore HTTP headers that include non-token characters in the header name. (markt)

#### Jasper

- Update to the Eclipse JDT Compiler 4.5.1. (markt)
- 57583: Improve the performance of `javax.servlet.jsp.el.ScopedAttributeELResolver` when resolving attributes that do not exist. This improvement only works when Jasper is used with Tomcat's EL implementation. (markt)

#### WebSocket

- Fix a timing issue on session close that could result in an exception being thrown for an incomplete message even through the message was completed. (markt)
- Correctly handle compression of partial messages when the final message fragment has a zero length payload. (markt)
- 59119: Correct read logic for WebSocket client when using secure connections. (markt)
- 59134: Correct client connect logic for secure connections made through a proxy. (markt)

#### Web applications

- Correct an error in the documentation of the expected behaviour for automatic deployment. If a WAR is updated and an expanded directory is present, the directory will always be deleted and recreated by expanding the WAR if `unpackWARs` is `true`. (markt)
- 48674: Implement an option within the Host Manager web application to persist the current configuration. Based on a patch by Coty Sutherland. (markt)
- 58935: Remove incorrect references in the documentation to using `jar:file:` URLs with the Manager application. (markt)
- Correct the description of the `ServletRequest.getServerPort()` in Proxy How-To. Issue reported via comments.apache.org. (violetagg)
- The Manager and Host Manager applications are now only accessible via `localhost` by default. (markt)

#### Tribes

- If promoting a proxy node to a primary node when getting a session, notify the change of the new primary node to the original backup node. (kfujino)

#### Other

- 58283: Change the default download location for libraries during the build process from `/usr/share/java` to `${user.home}/temp`. Patch provided by Ahmed Hosni. (markt)
- 59031: When using the Windows uninstaller, do not remove the contents of any directories that have been symlinked into the Tomcat directory structure. (markt)
- Update the packaged version of the Tomcat Native Library to 1.2.5 to pick up the Windows binaries that are based on OpenSSL 1.0.2g and APR 1.5.1. (markt)
- Modify the default `tomcat-users.xml` file to make it harder for users to configure the entries intended for use with the examples web application for the Manager application. (markt)

### 2016-02-05 Tomcat 9.0.0.M3 (markt)

#### General

- Allow to configure multiple JUnit test class patterns with the build property `test.name` and document the property in BUILDING.txt. (rjung)

#### Catalina

- Protect initialization of `ResourceLinkFactory` when running with a SecurityManager. (kkolinko)
- Correct a thread safety issue in the filtering of session attributes based on the implementing class name of the value object. (markt)
- Fix class loader decision on the delegation for class loading and resource lookup and make it faster too. (rjung)
- 58768: Log a warning if a redirect fails because of an invalid location. (markt)
- 58827: Remove remains of JSR-77 implementation. (markt)
- 58946: Ensure that the request parameter map remains immutable when processing via a RequestDispatcher. (markt)
- 58905: Ensure that `Tomcat.silence()` silences the correct logger and respects the current setting. (markt)

#### Coyote

- Correct a regression in the connector refactoring in 9.0.0.M2 that broke TLS support for the APR/native connector. (remm)
- Correct an NPE when listing the enabled ciphers (e.g. via the Manager web application) for a TLS enabled APR/native connector. (markt)
- New configuration option `ajpFlush` for the AJP connectors to disable the sending of AJP flush packets. (rjung)
- Handle the case in the NIO connector where the required TLS buffer sizes increase after the connection has been initiated. (markt)

### not released Tomcat 9.0.0.M2 (markt)

#### Catalina

- Refactor creation of `MapperListener` to ensure that the `Mapper` used is the `Mapper` associated with the `Service` for which the listener was created. (markt)
- Move the functionality that provides redirects for context roots and directories where a trailing `/` is added from the Mapper to the `DefaultServlet`. This enables such requests to be processed by any configured Valves and Filters before the redirect is made. This behaviour is configurable via the `mapperContextRootRedirectEnabled` and `mapperDirectoryRedirectEnabled` attributes of the Context which may be used to restore the previous behaviour. (markt)
- Refactor `Service.getContainer()` to return an `Engine` rather than a `Container`. (markt)
- 34319: Only load those keys in `StoreBase.processExpire` from JDBCStore, that are old enough, to be expired. Based on a patch by Tom Anderson. (fschumacher)
- 56917: As per RFC7231 (HTTP/1.1), allow HTTP/1.1 and later redirects to use relative URIs. This is controlled by a new attribute `useRelativeRedirects` on the Context and defaults to `true`. (markt)
- 58629: Allow an embedded Tomcat instance to start when the `Service` has no `Engine` configured. (markt)
- Correctly notify the MapperListener associated with a Service if the Engine for that Service is changed. (markt)
- Make a web application's CredentialHandler available through a context attribute. This allows a web application to use the same algorithm for validating or generating new stored credentials from cleartext ones. (schultz)
- 58635: Enable break points to be set within agent code when running Tomcat with a Java agent. Based on a patch by Huxing Zhang. (markt)
- Fixed potential NPE in `HostConfig` while deploying an application. Issue reported by coverity scan. (violetagg)
- 58655: Fix an `IllegalStateException` when calling `HttpServletResponse.sendRedirect()` with the `RemoteIpFilter`. This was caused by trying to correctly generate the absolute URI for the redirect. With the fix for 56917, redirects may now be relative making the `sendRedirect()` implementation for the `RemoteIpFilter` much simpler. This also addresses issues where the redirect may not have behaved as expected when redirecting from http to https to from https to http. (markt)
- 58657: Exceptions in a Servlet 3.1 `ReadListener` or `WriteListener` do not need to be immediately fatal to the connection. Allow an error response to be written. (markt)
- Correct implementation of `validateClientProvidedNewSessionId` so client provided session IDs may be rejected if validation is enabled. (markt)
- 58701: Reset the `instanceInitialized` field in `StandardWrapper` when unloading a Servlet so that a new instance may be correctly initialized. (markt)
- Add a new flag `aprPreferred` to the Apr listener. if set to `false`, when using the connector defaults, it will use NIO + OpenSSL if tomcat-native is available, rather than the APR connector. (remm)
- Add path parameter handling to `HttpServletRequest.getContextPath()`. This is a follow-up to the fix for 57215. (markt)
- 58692: Make `StandardJarScanner` more robust. Log a warning if a class path entry cannot be scanned rather than triggering the failure of the web application. Includes a test case written by Derek Abdine. (markt)
- 58702: Ensure an access log entry is generated if the client aborts the connection. (markt)
- Fixed various issues reported by Findbugs. (violetagg)
- 58735: Add support for the `X-XSS-Protection` header to the `HttpHeaderSecurityFilter`. Patch provided by Jacopo Cappellato. (markt)
- Add the `StatusManagerServlet` to the list of Servlets that can only be loaded by privileged applications. (markt)
- Simplify code and fix messages in `org.apache.catalina.core.DefaultInstanceManager` class. (kkolinko)
- 58751: Correctly handle the case where an `AsyncListener` dispatches to a Servlet on an asynchronous timeout and the Servlet uses `sendError()` to trigger an error page. Includes a test case based on code provided by Andy Wilkinson.(markt)
- Ensure that the proper file encoding if specified will be used when a readme file is served by DefaultServlet. (violetagg)
- Fix declaration of `localPort` attribute of Connector MBean: it is read-only. (kkolinko)
- 58766: Make skipping non-class files during annotation scanning faster by checking the file name first. Improve debug logging. (kkolinko)
- 58836: Correctly merge query string parameters when processing a forwarded request where the target includes a query string that contains a parameter with no value. (markt/kkolinko)
- Make sure that shared Digester is reset in an unlikely error case in `HostConfig.deployWAR()`. (kkolinko)
- Extend the feature available in the cluster session manager implementations that enables session attribute replication to be filtered based on attribute name to all session manager implementations. Note that configuration attribute name has changed from `sessionAttributeFilter` to `sessionAttributeNameFilter`. Apply the filter on load as well as unload to ensure that configuration changes made while the web application is stopped are applied to any persisted data. (markt)
- Extend the session attribute filtering options to include filtering based on the implementation class of the value and optional `WARN` level logging if an attribute is filtered. These options are available for all of the Manager implementations that ship with Tomcat. When a `SecurityManager` is used filtering will be enabled by default. (markt)
- Remove `distributable` and `maxInactiveInterval` from the `Manager` interface because the attributes are never used. The equivalent attributes from the `Context` always take precedence. (markt)
- 58867: Improve checking on Host start for WAR files that have been modified while Tomcat has stopped and re-expand them if `unpackWARs` is `true`. (markt)
- 58900: Correctly undeploy symlinked resources and prevent an infinite cycle of deploy / undeploy. (markt)

#### Coyote

- 58621: The certificate chain cannot be set using the main certificate attribute, so restore the certificate chain property. (remm)
- Allow a new SSL config type where a connector can use either JSSE or OpenSSL. Both could be allowed, but it would likely create support issues. This type is used by the OpenSSL implementation for NIOx. (remm)
- Improve upgrade context classloader handling by using Context.bind and unbind. (remm)
- Improve OpenSSL keystore/truststore configuration by using the code from the JSSE implementation. (remm, jfclere)
- Fix a potential loop when a client drops the connection unexpectedly. (markt)
- OpenSSL renegotiation support for client certificate authentication. (remm)
- Fix NIO connector renegotiation. (remm)
- 58659: Fix a potential deadlock during HTTP/2 processing when the connection window size is limited. (markt)

#### Jasper

- 57136#c25: Change default value of `quoteAttributeEL` setting in Jasper to be `true` for better compatibility with other implementations and older versions of Tomcat. Add command line option `-no-quoteAttributeEL` in JspC. (kkolinko)
- Fix handling of missing messages in `org.apache.el.util.MessageFactory`. (violetagg)

#### Cluster

- Enable an explicit configuration of local member in the static cluster membership. (kfujino)
- Fix potential integer overflow in `DeltaSession`. Reported by coverity scan. (fschumacher)
- In order to avoid that the heartbeat thread and the background thread to run `Channel.heartbeat` simultaneously, if `heartbeatBackgroundEnabled` of `SimpleTcpCluster` set to `true`, ensure that the heartbeat thread does not start. (kfujino)

#### WebSocket

- 55006: The WebSocket client now honors the `java.net.java.net.ProxySelector` configuration (using the HTTP type) when establishing WebSocket connections to servers. Based on a patch by Niki Dokovski. (markt)
- 58624: Correct a potential deadlock if the WebSocket connection is closed when a message write is in progress. (markt)
- 57489: Ensure `onClose()` is called when a WebSocket connection is closed even if the sending of the close message fails. Includes test cases by Barry Coughlan. (markt)

#### Web Applications

- 58631: Correct the continuation character use in the Windows Service How-To page of the documentation web application. (markt)
- Correct the SSL documentation for deprecated attributes to point to the correct, new location for attributes related to individual certificates. (markt)
- Correct some typos in the JNDI resources How-To. (markt)
- Don't create session unnecessarily in the Manager application. (markt)
- Don't create session unnecessarily in the Host Manager application. (markt)
- 58723: Clarify documentation and error messages for the text interface of the manager to make clear that version must be used with path when referencing contexts deployed using parallel deployment. (markt)
- Document `test.threads` option in BUILDING.txt. (kkolinko)

#### Tribes

- Ensure that the static member is registered to the add suspect list even if the static member that is registered to the remove suspect list has disappeared. (kfujino)
- When using a static cluster, add the members that have been cached in the membership service to the map members list in order to ensure that the map member is a static member. (kfujino)
- Add support for the startup notification of local members in the static cluster. (kfujino)
- Ignore the unnecessary member remove operation from different domain. (kfujino)
- Add support for the shutdown notification of local members in the static cluster. (kfujino)

#### jdbc-pool

- Correct evaluation of system property `org.apache.tomcat.jdbc.pool.onlyAttemptCurrentClassLoader`. It was basically ignored before. Reported by coverity scan. (fschumacher)
- Fix potential integer overflow in `ConnectionPool` and `PooledConnection`. Reported by coverity scan. (fschumacher)

#### Other

- Update optional Checkstyle library to 6.14.1. (kkolinko)
- Update the packaged version of the Tomcat Native Library to 1.2.4 to pick up the Windows binaries that are based on OpenSSL 1.0.2e and APR 1.5.1. (markt)
- Update the NSIS Installer used to build the Windows Installers to version 2.50. (markt/kkolinko)
- Update the internal fork of Commons BCEL to r1725718 to align with the refactoring for BCEL 6, the next major BCEL release. (markt)
- Update the internal fork of Commons DBCP 2 to r1725730 (2.1.1 plus additional fixes). (markt)
- Update the internal fork of Commons Pool 2 to r1725738 (2.4.2 plus additional fixes). (markt)
- Update the internal fork of Commons Codec to r1725746 (1.9 plus additional fixes). (markt)

### 2015-11-17 Tomcat 9.0.0.M1 (markt)

#### General

- Make Java 8 the minimum required version to build and run Tomcat 9. (markt)
- Remove support for Comet. (markt)
- Tighten up the default file permissions for the `.tar.gz` distribution so no files or directories are world readable by default. Configure Tomcat to run with a default umask of `0027` which may be overridden by setting `UMASK` in `setenv.sh`. (markt)
- Remove native code (Windows Service Wrapper, APR/native connector) support for Windows Itanium. (markt)

#### Catalina

- The default HTTP cookie parser has been changed to `org.apache.tomcat.util.http.Rfc6265CookieProcessor`. (markt)

#### Coyote

- Remove support for the HTTP BIO and AJP BIO connectors. (markt)
- Refactor HTTP upgrade and AJP implementations to reduce duplication. (markt)
- Add support for HPACK header encoding and decoding, contributed by Stuart Douglas. (remm)
- 57108: Add support for Server Name Indication (SNI). There has been significant changes to the SSL configuration in server.xml to support this. (markt)
- Add SSL engine for JSSE backed by OpenSSL. Includes ALPN support. Based on code contributed by Numa de Montmollin and derived from code developed by Twitter and Netty. (remm)
- RFC 7230 states that clients should ignore reason phrases in HTTP/1.1 response messages. Since the reason phrase is optional, Tomcat no longer sends it. As a result the system property `org.apache.coyote.USE_CUSTOM_STATUS_MSG_IN_HEADER` is no longer used and has been removed. (markt)
- The minimum required Tomcat Native version has been increased to 1.2.2. The 1.2.x branch includes ALPN and SNI support which are required for HTTP/2. (markt)
- Add support for HTTP/2 including server push. (markt)

#### Tribes

- Clarify the handling of Copy message and Copy nodes. (kfujino)

#### Other

- Support the use of the `threads` attribute on Ant's junit task. Note that using this with a value of greater than one will disable Cobertura code coverage. (markt)