001/** 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 019package org.apache.hadoop.hbase.chaos.actions; 020 021import org.apache.hadoop.hbase.ClusterMetrics; 022import org.apache.hadoop.hbase.ServerName; 023import org.slf4j.Logger; 024import org.slf4j.LoggerFactory; 025 026/** 027* Action that tries to restart the HRegionServer holding Meta. 028*/ 029public class RestartRsHoldingMetaAction extends RestartActionBaseAction { 030 private static final Logger LOG = 031 LoggerFactory.getLogger(RestartRsHoldingMetaAction.class); 032 033 public RestartRsHoldingMetaAction(long sleepTime) { 034 super(sleepTime); 035 } 036 @Override 037 public void perform() throws Exception { 038 LOG.info("Performing action: Restart region server holding META"); 039 ServerName server = cluster.getServerHoldingMeta(); 040 if (server == null) { 041 LOG.warn("No server is holding hbase:meta right now."); 042 return; 043 } 044 ClusterMetrics clusterStatus = cluster.getClusterMetrics(); 045 if (server.equals(clusterStatus.getMasterName())) { 046 // Master holds the meta, so restart the master. 047 restartMaster(server, sleepTime); 048 } else { 049 restartRs(server, sleepTime); 050 } 051 } 052}