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1   /**
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  package org.apache.hadoop.hbase.ipc;
19  
20  import org.apache.hadoop.hbase.HBaseIOException;
21  import org.apache.hadoop.hbase.classification.InterfaceAudience;
22  import org.apache.hadoop.hbase.classification.InterfaceStability;
23  
24  /**
25   * Indicate that the rpc server tells client to fallback to simple auth but client is disabled to do
26   * so.
27   */
28  @InterfaceAudience.Public
29  @InterfaceStability.Evolving
30  public class FallbackDisallowedException extends HBaseIOException {
31  
32    private static final long serialVersionUID = -6942845066279358253L;
33  
34    public FallbackDisallowedException() {
35      super("Server asks us to fall back to SIMPLE auth, "
36          + "but this client is configured to only allow secure connections.");
37    }
38  }