001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *     http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    
019    
020    package org.apache.hadoop.hdfs.server.datanode;
021    
022    import java.io.IOException;
023    
024    /**
025     * Exception indicating that the target block already exists 
026     * and is not set to be recovered/overwritten.  
027     */
028    public class ReplicaAlreadyExistsException extends IOException {
029      private static final long serialVersionUID = 1L;
030    
031      public ReplicaAlreadyExistsException() {
032        super();
033      }
034    
035      public ReplicaAlreadyExistsException(String msg) {
036        super(msg);
037      }
038    }