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 */ 018package org.apache.hadoop.hbase.master; 019 020import static org.junit.Assert.assertNotNull; 021 022import java.io.IOException; 023import java.util.concurrent.CountDownLatch; 024import org.apache.hadoop.conf.Configuration; 025import org.apache.hadoop.hbase.HBaseClassTestRule; 026import org.apache.hadoop.hbase.HBaseTestingUtility; 027import org.apache.hadoop.hbase.HConstants; 028import org.apache.hadoop.hbase.MiniHBaseCluster; 029import org.apache.hadoop.hbase.testclassification.MasterTests; 030import org.apache.hadoop.hbase.testclassification.MediumTests; 031import org.apache.hadoop.hbase.util.JVMClusterUtil.MasterThread; 032import org.apache.zookeeper.KeeperException; 033import org.junit.AfterClass; 034import org.junit.BeforeClass; 035import org.junit.ClassRule; 036import org.junit.Test; 037import org.junit.experimental.categories.Category; 038 039/** 040 * Test to confirm that we will not hang when stop a backup master which is trying to become the 041 * active master. See HBASE-19838 042 */ 043@Category({ MasterTests.class, MediumTests.class }) 044public class TestShutdownBackupMaster { 045 046 @ClassRule 047 public static final HBaseClassTestRule CLASS_RULE = 048 HBaseClassTestRule.forClass(TestShutdownBackupMaster.class); 049 050 private static final HBaseTestingUtility UTIL = new HBaseTestingUtility(); 051 052 private static volatile CountDownLatch ARRIVE; 053 054 private static volatile CountDownLatch CONTINUE; 055 056 public static final class MockHMaster extends HMaster { 057 058 public MockHMaster(Configuration conf) throws IOException, KeeperException { 059 super(conf); 060 } 061 062 @Override 063 protected void initClusterSchemaService() throws IOException, InterruptedException { 064 if (ARRIVE != null) { 065 ARRIVE.countDown(); 066 CONTINUE.await(); 067 } 068 super.initClusterSchemaService(); 069 } 070 } 071 072 @BeforeClass 073 public static void setUpBeforeClass() throws Exception { 074 UTIL.getConfiguration().setClass(HConstants.MASTER_IMPL, MockHMaster.class, HMaster.class); 075 UTIL.startMiniCluster(2, 2); 076 UTIL.waitUntilAllSystemRegionsAssigned(); 077 } 078 079 @AfterClass 080 public static void tearDownAfterClass() throws Exception { 081 // make sure that we can stop the cluster cleanly 082 UTIL.shutdownMiniCluster(); 083 } 084 085 @Test 086 public void testShutdownWhileBecomingActive() throws InterruptedException { 087 MiniHBaseCluster cluster = UTIL.getHBaseCluster(); 088 HMaster activeMaster = null; 089 HMaster backupMaster = null; 090 for (MasterThread t : cluster.getMasterThreads()) { 091 if (t.getMaster().isActiveMaster()) { 092 activeMaster = t.getMaster(); 093 } else { 094 backupMaster = t.getMaster(); 095 } 096 } 097 assertNotNull(activeMaster); 098 assertNotNull(backupMaster); 099 ARRIVE = new CountDownLatch(1); 100 CONTINUE = new CountDownLatch(1); 101 activeMaster.abort("Aborting active master for test"); 102 // wait until we arrive the initClusterSchemaService 103 ARRIVE.await(); 104 // killall RSes 105 cluster.getRegionServerThreads().stream().map(t -> t.getRegionServer()) 106 .forEachOrdered(rs -> rs.abort("Aborting RS for test")); 107 CONTINUE.countDown(); 108 } 109}