/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
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package org.apache.hadoop.hbase.chaos.actions;
import org.apache.hadoop.hbase.HBaseTestingUtility;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.Admin;
import java.util.Random;
public class DecreaseMaxHFileSizeAction extends Action {
private static final long minFileSize = 1 * 1024 * 1024 * 1024L;
private final long sleepTime;
private final TableName tableName;
private final Random random;
public DecreaseMaxHFileSizeAction(long sleepTime, TableName tableName) {
this.sleepTime = sleepTime;
this.tableName = tableName;
this.random = new Random();
}
@Override
public void perform() throws Exception {
HBaseTestingUtility util = context.getHBaseIntegrationTestingUtility();
Admin admin = util.getAdmin();
HTableDescriptor htd = admin.getTableDescriptor(tableName);
// Try and get the current value.
long currentValue = htd.getMaxFileSize();
// If the current value is not set use the default for the cluster.
// If configs are really weird this might not work.
// That's ok. We're trying to cause chaos.
if (currentValue <= 0) {
currentValue =
context.getHBaseCluster().getConf().getLong(HConstants.HREGION_MAX_FILESIZE,
HConstants.DEFAULT_MAX_FILE_SIZE);
}
// Decrease by 10% at a time.
long newValue = (long) (currentValue * 0.9);
// We don't want to go too far below 1gb.
// So go to about 1gb +/- 512 on each side.
newValue = Math.max(minFileSize, newValue) - (512 - random.nextInt(1024));
// Change the table descriptor.
htd.setMaxFileSize(newValue);
// Don't try the modify if we're stopping
if (context.isStopping()) {
return;
}
// modify the table.
admin.modifyTable(tableName, htd);
// Sleep some time.
if (sleepTime > 0) {
Thread.sleep(sleepTime);
}
}
}