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.HBaseTestingUtility;
023import org.apache.hadoop.hbase.TableName;
024import org.apache.hadoop.hbase.client.Admin;
025import org.slf4j.Logger;
026import org.slf4j.LoggerFactory;
027
028public class SplitAllRegionOfTableAction extends Action {
029  private static final Logger LOG = LoggerFactory.getLogger(SplitAllRegionOfTableAction.class);
030  private static final int DEFAULT_MAX_SPLITS = 3;
031  private static final String MAX_SPLIT_KEY = "hbase.chaosmonkey.action.maxFullTableSplits";
032
033  private final TableName tableName;
034  private int maxFullTableSplits = DEFAULT_MAX_SPLITS;
035  private int splits = 0;
036
037  public SplitAllRegionOfTableAction(TableName tableName) {
038    this.tableName = tableName;
039  }
040
041  @Override
042  public void init(ActionContext context) throws IOException {
043    super.init(context);
044    this.maxFullTableSplits = getConf().getInt(MAX_SPLIT_KEY, DEFAULT_MAX_SPLITS);
045  }
046
047  @Override
048  protected Logger getLogger() {
049    return LOG;
050  }
051
052  @Override
053  public void perform() throws Exception {
054    HBaseTestingUtility util = context.getHBaseIntegrationTestingUtility();
055    Admin admin = util.getAdmin();
056    // Don't try the split if we're stopping
057    if (context.isStopping()) {
058      return;
059    }
060    // Don't always split. This should allow splitting of a full table later in the run
061    if (
062      ThreadLocalRandom.current().nextDouble()
063          < (((double) splits) / ((double) maxFullTableSplits)) / ((double) 2)
064    ) {
065      splits++;
066      getLogger().info("Performing action: Split all regions of {}", tableName);
067      admin.split(tableName);
068    } else {
069      getLogger().info("Skipping split of all regions.");
070    }
071  }
072}