1 /**
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19 package org.apache.hadoop.hbase.chaos.actions;
20
21 import org.apache.hadoop.hbase.ClusterStatus;
22 import org.apache.hadoop.hbase.ServerName;
23
24 /**
25 * Action that tries to restart the HRegionServer holding Meta.
26 */
27 public class RestartRsHoldingMetaAction extends RestartActionBaseAction {
28 public RestartRsHoldingMetaAction(long sleepTime) {
29 super(sleepTime);
30 }
31 @Override
32 public void perform() throws Exception {
33 LOG.info("Performing action: Restart region server holding META");
34 ServerName server = cluster.getServerHoldingMeta();
35 if (server == null) {
36 LOG.warn("No server is holding hbase:meta right now.");
37 return;
38 }
39 ClusterStatus clusterStatus = cluster.getClusterStatus();
40 if (server.equals(clusterStatus.getMaster())) {
41 // Master holds the meta, so restart the master.
42 restartMaster(server, sleepTime);
43 } else {
44 restartRs(server, sleepTime);
45 }
46 }
47 }