1 /**
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 */
19 package org.apache.hadoop.hbase.util;
20
21 import java.util.HashSet;
22 import java.util.Set;
23
24 import org.apache.hadoop.hbase.classification.InterfaceAudience;
25 import org.apache.hadoop.hbase.classification.InterfaceStability;
26
27 /**
28 * Utility class to get and check the current JVM version.
29 */
30 @InterfaceAudience.Private
31 @InterfaceStability.Stable
32 public abstract class JvmVersion {
33 private static Set<String> BAD_JVM_VERSIONS = new HashSet<String>();
34 static {
35 BAD_JVM_VERSIONS.add("1.6.0_18");
36 }
37
38 /**
39 * Return true if the current JVM version is known to be unstable with HBase.
40 */
41 public static boolean isBadJvmVersion() {
42 String version = System.getProperty("java.version");
43 return version != null && BAD_JVM_VERSIONS.contains(version);
44 }
45
46 /**
47 * Return the current JVM version information.
48 */
49 public static String getVersion() {
50 return System.getProperty("java.vm.vendor", "UNKNOWN_VM_VENDOR") + ' ' +
51 System.getProperty("java.version", "UNKNOWN_JAVA_VERSION") + '-' +
52 System.getProperty("java.vm.version", "UNKNOWN_VM_VERSION");
53 }
54 }