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; 028import org.slf4j.Logger; 029import org.slf4j.LoggerFactory; 030 031/** 032* Action that tries to flush a random region of a table. 033*/ 034public class FlushRandomRegionOfTableAction extends Action { 035 private static final Logger LOG = 036 LoggerFactory.getLogger(FlushRandomRegionOfTableAction.class); 037 private final long sleepTime; 038 private final TableName tableName; 039 040 public FlushRandomRegionOfTableAction(TableName tableName) { 041 this (-1, tableName); 042 } 043 044 public FlushRandomRegionOfTableAction(int sleepTime, TableName tableName) { 045 this.sleepTime = sleepTime; 046 this.tableName = tableName; 047 } 048 049 @Override 050 public void perform() throws Exception { 051 HBaseTestingUtility util = context.getHBaseIntegrationTestingUtility(); 052 Admin admin = util.getAdmin(); 053 054 LOG.info("Performing action: Flush random region of table " + tableName); 055 List<HRegionInfo> regions = admin.getTableRegions(tableName); 056 if (regions == null || regions.isEmpty()) { 057 LOG.info("Table " + tableName + " doesn't have regions to flush"); 058 return; 059 } 060 061 HRegionInfo region = PolicyBasedChaosMonkey.selectRandomItem( 062 regions.toArray(new HRegionInfo[regions.size()])); 063 LOG.debug("Flushing region " + region.getRegionNameAsString()); 064 try { 065 admin.flushRegion(region.getRegionName()); 066 } catch (Exception ex) { 067 LOG.warn("Flush failed, might be caused by other chaos: " + ex.getMessage()); 068 } 069 if (sleepTime > 0) { 070 Thread.sleep(sleepTime); 071 } 072 } 073}