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 java.util.List;
021import java.util.concurrent.ThreadLocalRandom;
022import org.apache.hadoop.hbase.HRegionLocation;
023import org.apache.hadoop.hbase.client.RegionLocator;
024import org.slf4j.Logger;
025import org.slf4j.LoggerFactory;
026
027/**
028 * Action that restarts an HRegionServer holding one of the regions of the table.
029 */
030public class RestartRsHoldingTableAction extends RestartActionBaseAction {
031  private static final Logger LOG = LoggerFactory.getLogger(RestartRsHoldingTableAction.class);
032
033  private final RegionLocator locator;
034
035  public RestartRsHoldingTableAction(long sleepTime, RegionLocator locator) {
036    super(sleepTime);
037    this.locator = locator;
038  }
039
040  @Override
041  protected Logger getLogger() {
042    return LOG;
043  }
044
045  @Override
046  public void perform() throws Exception {
047    getLogger()
048      .info("Performing action: Restart random RS holding table " + this.locator.getName());
049    List<HRegionLocation> locations = locator.getAllRegionLocations();
050    restartRs(locations.get(ThreadLocalRandom.current().nextInt(locations.size())).getServerName(),
051      sleepTime);
052  }
053}