001/**
002 *
003 * Licensed to the Apache Software Foundation (ASF) under one
004 * or more contributor license agreements.  See the NOTICE file
005 * distributed with this work for additional information
006 * regarding copyright ownership.  The ASF licenses this file
007 * to you under the Apache License, Version 2.0 (the
008 * "License"); you may not use this file except in compliance
009 * with the License.  You may obtain a copy of the License at
010 *
011 *     http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 */
019package org.apache.hadoop.hbase.regionserver;
020
021import java.io.IOException;
022import java.util.ArrayList;
023import java.util.List;
024
025import org.apache.hadoop.hbase.CoordinatedStateManager;
026import org.apache.hadoop.hbase.HBaseConfiguration;
027import org.apache.hadoop.hbase.client.Put;
028import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;
029import org.apache.hadoop.hbase.shaded.protobuf.RequestConverter;
030import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.MutateRequest;
031
032/**
033 * A region server that will OOME.
034 * Everytime {@link #put(byte[], Put)} is called, we add
035 * keep around a reference to the batch.  Use this class to test OOME extremes.
036 * Needs to be started manually as in
037 * <code>${HBASE_HOME}/bin/hbase ./bin/hbase org.apache.hadoop.hbase.OOMERegionServer start</code>.
038 */
039public class OOMERegionServer extends HRegionServer {
040  private List<Put> retainer = new ArrayList<>();
041
042  public OOMERegionServer(HBaseConfiguration conf) throws IOException, InterruptedException {
043    super(conf);
044  }
045
046  public void put(byte [] regionName, Put put)
047  throws IOException {
048    try {
049      MutateRequest request =
050        RequestConverter.buildMutateRequest(regionName, put);
051      rpcServices.mutate(null, request);
052      for (int i = 0; i < 30; i++) {
053        // Add the batch update 30 times to bring on the OOME faster.
054        this.retainer.add(put);
055      }
056    } catch (org.apache.hbase.thirdparty.com.google.protobuf.ServiceException e) {
057      throw ProtobufUtil.handleRemoteException(e);
058    }
059  }
060
061  public static void main(String[] args) {
062    new HRegionServerCommandLine(OOMERegionServer.class).doMain(args);
063  }
064}