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 }