1 /** 2 * Copyright 2007 The Apache Software Foundation 3 * 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 package org.apache.hadoop.hbase.regionserver; 21 22 import java.io.IOException; 23 import java.util.ArrayList; 24 import java.util.List; 25 26 import org.apache.hadoop.hbase.HBaseConfiguration; 27 import org.apache.hadoop.hbase.client.Put; 28 29 /** 30 * A region server that will OOME. 31 * Everytime {@link #put(regionName, Put)} is called, we add 32 * keep around a reference to the batch. Use this class to test OOME extremes. 33 * Needs to be started manually as in 34 * <code>${HBASE_HOME}/bin/hbase ./bin/hbase org.apache.hadoop.hbase.OOMERegionServer start</code>. 35 */ 36 public class OOMERegionServer extends HRegionServer { 37 private List<Put> retainer = new ArrayList<Put>(); 38 39 public OOMERegionServer(HBaseConfiguration conf) throws IOException, InterruptedException { 40 super(conf); 41 } 42 43 public void put(byte [] regionName, Put put) 44 throws IOException { 45 super.put(regionName, put); 46 for (int i = 0; i < 30; i++) { 47 // Add the batch update 30 times to bring on the OOME faster. 48 this.retainer.add(put); 49 } 50 } 51 52 public static void main(String[] args) throws Exception { 53 new HRegionServerCommandLine(OOMERegionServer.class).doMain(args); 54 } 55 }