| /** |
| * 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.io.IOException; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.List; |
| import org.apache.commons.lang3.RandomUtils; |
| 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.client.RegionInfo; |
| |
| /** |
| * 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().getAdmin(); |
| ServerName[] servers = getServers(admin); |
| |
| LOG.info("Performing action: Move regions of table {}", tableName); |
| List<RegionInfo> regions = admin.getRegions(tableName); |
| if (regions == null || regions.isEmpty()) { |
| LOG.info("Table {} doesn't have regions to move", tableName); |
| return; |
| } |
| |
| Collections.shuffle(regions); |
| |
| long start = System.currentTimeMillis(); |
| for (RegionInfo regionInfo : regions) { |
| // Don't try the move if we're stopping |
| if (context.isStopping()) { |
| return; |
| } |
| |
| moveRegion(admin, servers, regionInfo); |
| 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; |
| } |
| } |
| } |
| |
| static ServerName [] getServers(Admin admin) throws IOException { |
| Collection<ServerName> serversList = admin.getRegionServers(); |
| return serversList.toArray(new ServerName[serversList.size()]); |
| } |
| |
| static void moveRegion(Admin admin, ServerName [] servers, RegionInfo regionInfo) { |
| try { |
| ServerName destServerName = servers[RandomUtils.nextInt(0, servers.length)]; |
| LOG.debug("Moving {} to {}", regionInfo.getRegionNameAsString(), destServerName); |
| admin.move(regionInfo.getEncodedNameAsBytes(), destServerName); |
| } catch (Exception ex) { |
| LOG.warn("Move failed, might be caused by other chaos: {}", ex.getMessage()); |
| } |
| } |
| } |