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 java.util.List;
022import org.apache.commons.lang3.RandomUtils;
023import org.apache.hadoop.hbase.HRegionLocation;
024import org.apache.hadoop.hbase.client.RegionLocator;
025import org.slf4j.Logger;
026import org.slf4j.LoggerFactory;
027
028/**
029* Action that restarts an HRegionServer holding one of the regions of the table.
030*/
031public class RestartRsHoldingTableAction extends RestartActionBaseAction {
032  private static final Logger LOG = LoggerFactory.getLogger(RestartRsHoldingTableAction.class);
033
034  private final RegionLocator locator;
035
036  public RestartRsHoldingTableAction(long sleepTime, RegionLocator locator) {
037    super(sleepTime);
038    this.locator = locator;
039  }
040
041  @Override protected Logger getLogger() {
042    return LOG;
043  }
044
045  @Override
046  public void perform() throws Exception {
047    getLogger().info(
048      "Performing action: Restart random RS holding table " + this.locator.getName());
049
050    List<HRegionLocation> locations = locator.getAllRegionLocations();
051    restartRs(locations.get(RandomUtils.nextInt(0, locations.size())).getServerName(), sleepTime);
052  }
053}