/**
* 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.
*/
package org.apache.hadoop.hbase.chaos.actions;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import org.apache.commons.lang.math.RandomUtils;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.chaos.factories.MonkeyConstants;
import org.apache.hadoop.hbase.client.Admin;
import org.apache.hadoop.hbase.util.Bytes;
/**
* Action that tries to move every region of a table.
*/
public class MoveRegionsOfTableAction extends Action {
private final long sleepTime;
private final TableName tableName;
private final long maxTime;
public MoveRegionsOfTableAction(TableName tableName) {
this(-1, MonkeyConstants.DEFAULT_MOVE_REGIONS_MAX_TIME, tableName);
}
public MoveRegionsOfTableAction(long sleepTime, long maxSleepTime, TableName tableName) {
this.sleepTime = sleepTime;
this.tableName = tableName;
this.maxTime = maxSleepTime;
}
@Override
public void perform() throws Exception {
if (sleepTime > 0) {
Thread.sleep(sleepTime);
}
Admin admin = this.context.getHBaseIntegrationTestingUtility().getHBaseAdmin();
Collection<ServerName> serversList = admin.getClusterStatus().getServers();
ServerName[] servers = serversList.toArray(new ServerName[serversList.size()]);
LOG.info("Performing action: Move regions of table " + tableName);
List<HRegionInfo> regions = admin.getTableRegions(tableName);
if (regions == null || regions.isEmpty()) {
LOG.info("Table " + tableName + " doesn't have regions to move");
return;
}
Collections.shuffle(regions);
long start = System.currentTimeMillis();
for (HRegionInfo regionInfo:regions) {
try {
String destServerName =
servers[RandomUtils.nextInt(servers.length)].getServerName();
LOG.debug("Moving " + regionInfo.getRegionNameAsString() + " to " + destServerName);
admin.move(regionInfo.getEncodedNameAsBytes(), Bytes.toBytes(destServerName));
} catch (Exception ex) {
LOG.warn("Move failed, might be caused by other chaos: " + ex.getMessage());
}
if (sleepTime > 0) {
Thread.sleep(sleepTime);
}
// put a limit on max num regions. Otherwise, this won't finish
// with a sleep time of 10sec, 100 regions will finish in 16min
if (System.currentTimeMillis() - start > maxTime) {
break;
}
}
}
}