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.io.IOException;
021import java.util.concurrent.ThreadLocalRandom;
022import org.apache.hadoop.hbase.HConstants;
023import org.apache.hadoop.hbase.TableName;
024import org.apache.hadoop.hbase.client.Admin;
025import org.apache.hadoop.hbase.client.TableDescriptor;
026import org.apache.hadoop.hbase.client.TableDescriptorBuilder;
027import org.slf4j.Logger;
028import org.slf4j.LoggerFactory;
029
030public class DecreaseMaxHFileSizeAction extends Action {
031
032  private static final Logger LOG = LoggerFactory.getLogger(DecreaseMaxHFileSizeAction.class);
033
034  private final long sleepTime;
035  private final long minHFileSize;
036  private final float hfileSizeJitter;
037  private final TableName tableName;
038  private Admin admin;
039
040  public DecreaseMaxHFileSizeAction(long sleepTime, long minHFileSize, float hfileSizeJitter,
041    TableName tableName) {
042    this.sleepTime = sleepTime;
043    this.minHFileSize = minHFileSize;
044    this.hfileSizeJitter = hfileSizeJitter;
045    this.tableName = tableName;
046  }
047
048  @Override
049  protected Logger getLogger() {
050    return LOG;
051  }
052
053  @Override
054  public void init(ActionContext context) throws IOException {
055    super.init(context);
056    this.admin = context.getHBaseIntegrationTestingUtility().getAdmin();
057  }
058
059  @Override
060  public void perform() throws Exception {
061    TableDescriptor td = admin.getDescriptor(tableName);
062
063    // Try and get the current value.
064    long currentValue = td.getMaxFileSize();
065
066    // If the current value is not set use the default for the cluster.
067    // If configs are really weird this might not work.
068    // That's ok. We're trying to cause chaos.
069    if (currentValue <= 0) {
070      currentValue = context.getHBaseCluster().getConf().getLong(HConstants.HREGION_MAX_FILESIZE,
071        HConstants.DEFAULT_MAX_FILE_SIZE);
072    }
073
074    // Decrease by 10% at a time.
075    long newValue = (long) (currentValue * 0.9);
076
077    // We don't want to go too far below 1gb.
078    // So go to about 1gb +/- 512 on each side.
079    newValue = Math.max(minHFileSize, newValue);
080    newValue +=
081      newValue * ThreadLocalRandom.current().nextDouble(-hfileSizeJitter, hfileSizeJitter);
082
083    // Change the table descriptor.
084    TableDescriptor modifiedTable =
085      TableDescriptorBuilder.newBuilder(td).setMaxFileSize(newValue).build();
086
087    // Don't try the modify if we're stopping
088    if (context.isStopping()) {
089      return;
090    }
091
092    // modify the table.
093    admin.modifyTable(modifiedTable);
094
095    // Sleep some time.
096    if (sleepTime > 0) {
097      Thread.sleep(sleepTime);
098    }
099  }
100}