1 /**
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 */
19 package org.apache.hadoop.hbase.regionserver;
20
21 import java.io.IOException;
22 import java.util.ArrayList;
23 import java.util.List;
24
25 import org.apache.hadoop.hbase.HBaseConfiguration;
26 import org.apache.hadoop.hbase.client.Put;
27 import org.apache.hadoop.hbase.client.Durability;
28 import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
29 import org.apache.hadoop.hbase.protobuf.RequestConverter;
30 import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.MutateRequest;
31
32 import com.google.protobuf.ServiceException;
33
34 /**
35 * A region server that will OOME.
36 * Everytime {@link #put(regionName, Durability)} is called, we add
37 * keep around a reference to the batch. Use this class to test OOME extremes.
38 * Needs to be started manually as in
39 * <code>${HBASE_HOME}/bin/hbase ./bin/hbase org.apache.hadoop.hbase.OOMERegionServer start</code>.
40 */
41 public class OOMERegionServer extends HRegionServer {
42 private List<Put> retainer = new ArrayList<Put>();
43
44 public OOMERegionServer(HBaseConfiguration conf) throws IOException, InterruptedException {
45 super(conf);
46 }
47
48 public void put(byte [] regionName, Put put)
49 throws IOException {
50 try {
51 MutateRequest request =
52 RequestConverter.buildMutateRequest(regionName, put);
53 super.mutate(null, request);
54 for (int i = 0; i < 30; i++) {
55 // Add the batch update 30 times to bring on the OOME faster.
56 this.retainer.add(put);
57 }
58 } catch (ServiceException se) {
59 throw ProtobufUtil.getRemoteException(se);
60 }
61 }
62
63 public static void main(String[] args) {
64 new HRegionServerCommandLine(OOMERegionServer.class).doMain(args);
65 }
66 }