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 */ 018 019package org.apache.hadoop.hbase.chaos.actions; 020 021import java.util.List; 022 023import org.apache.hadoop.hbase.HBaseTestingUtility; 024import org.apache.hadoop.hbase.HRegionInfo; 025import org.apache.hadoop.hbase.TableName; 026import org.apache.hadoop.hbase.chaos.monkies.PolicyBasedChaosMonkey; 027import org.apache.hadoop.hbase.client.Admin; 028 029/** 030* Action that tries to flush a random region of a table. 031*/ 032public class FlushRandomRegionOfTableAction extends Action { 033 private final long sleepTime; 034 private final TableName tableName; 035 036 public FlushRandomRegionOfTableAction(TableName tableName) { 037 this (-1, tableName); 038 } 039 040 public FlushRandomRegionOfTableAction(int sleepTime, TableName tableName) { 041 this.sleepTime = sleepTime; 042 this.tableName = tableName; 043 } 044 045 @Override 046 public void perform() throws Exception { 047 HBaseTestingUtility util = context.getHBaseIntegrationTestingUtility(); 048 Admin admin = util.getAdmin(); 049 050 LOG.info("Performing action: Flush random region of table " + tableName); 051 List<HRegionInfo> regions = admin.getTableRegions(tableName); 052 if (regions == null || regions.isEmpty()) { 053 LOG.info("Table " + tableName + " doesn't have regions to flush"); 054 return; 055 } 056 057 HRegionInfo region = PolicyBasedChaosMonkey.selectRandomItem( 058 regions.toArray(new HRegionInfo[regions.size()])); 059 LOG.debug("Flushing region " + region.getRegionNameAsString()); 060 try { 061 admin.flushRegion(region.getRegionName()); 062 } catch (Exception ex) { 063 LOG.warn("Flush failed, might be caused by other chaos: " + ex.getMessage()); 064 } 065 if (sleepTime > 0) { 066 Thread.sleep(sleepTime); 067 } 068 } 069}