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 */
018package org.apache.hadoop.hbase.chaos.actions;
019
020import org.apache.hadoop.hbase.ClusterMetrics;
021import org.apache.hadoop.hbase.ServerName;
022import org.slf4j.Logger;
023import org.slf4j.LoggerFactory;
024
025/**
026 * Action that tries to restart the HRegionServer holding Meta.
027 */
028public class RestartRsHoldingMetaAction extends RestartActionBaseAction {
029  private static final Logger LOG = LoggerFactory.getLogger(RestartRsHoldingMetaAction.class);
030
031  public RestartRsHoldingMetaAction(long sleepTime) {
032    super(sleepTime);
033  }
034
035  @Override
036  protected Logger getLogger() {
037    return LOG;
038  }
039
040  @Override
041  public void perform() throws Exception {
042    getLogger().info("Performing action: Restart regionserver holding META");
043    ServerName server = cluster.getServerHoldingMeta();
044    if (server == null) {
045      getLogger().warn("No server is holding hbase:meta right now.");
046      return;
047    }
048    ClusterMetrics clusterStatus = cluster.getClusterMetrics();
049    if (server.equals(clusterStatus.getMasterName())) {
050      // Master holds the meta, so restart the master.
051      restartMaster(server, sleepTime);
052    } else {
053      restartRs(server, sleepTime);
054    }
055  }
056}