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 {
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) {
53 HRegionServer.doMain(args, OOMERegionServer.class);
54 }
55 }