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 */
018package org.apache.hadoop.hbase.regionserver;
019
020import java.io.IOException;
021import java.util.ArrayList;
022import java.util.List;
023import org.apache.hadoop.hbase.HBaseConfiguration;
024import org.apache.hadoop.hbase.client.Put;
025
026import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;
027import org.apache.hadoop.hbase.shaded.protobuf.RequestConverter;
028import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.MutateRequest;
029
030/**
031 * A region server that will OOME. Everytime {@link #put(byte[], Put)} is called, we add keep around
032 * a reference to the batch. Use this class to test OOME extremes. Needs to be started manually as
033 * in
034 * <code>${HBASE_HOME}/bin/hbase ./bin/hbase org.apache.hadoop.hbase.OOMERegionServer start</code>.
035 */
036public class OOMERegionServer extends HRegionServer {
037  private List<Put> retainer = new ArrayList<>();
038
039  public OOMERegionServer(HBaseConfiguration conf) throws IOException, InterruptedException {
040    super(conf);
041  }
042
043  public void put(byte[] regionName, Put put) throws IOException {
044    try {
045      MutateRequest request = RequestConverter.buildMutateRequest(regionName, put);
046      rpcServices.mutate(null, request);
047      for (int i = 0; i < 30; i++) {
048        // Add the batch update 30 times to bring on the OOME faster.
049        this.retainer.add(put);
050      }
051    } catch (org.apache.hbase.thirdparty.com.google.protobuf.ServiceException e) {
052      throw ProtobufUtil.handleRemoteException(e);
053    }
054  }
055
056  public static void main(String[] args) {
057    new HRegionServerCommandLine(OOMERegionServer.class).doMain(args);
058  }
059}