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.procedure;
019
020import static org.junit.Assert.assertTrue;
021
022import java.util.List;
023import org.apache.hadoop.conf.Configuration;
024import org.apache.hadoop.hbase.HBaseClassTestRule;
025import org.apache.hadoop.hbase.HBaseTestingUtil;
026import org.apache.hadoop.hbase.TableName;
027import org.apache.hadoop.hbase.Waiter;
028import org.apache.hadoop.hbase.client.RegionInfo;
029import org.apache.hadoop.hbase.procedure2.ProcedureExecutor;
030import org.apache.hadoop.hbase.procedure2.ProcedureTestingUtility;
031import org.apache.hadoop.hbase.testclassification.MediumTests;
032import org.apache.hadoop.hbase.util.Bytes;
033import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
034import org.apache.hadoop.hbase.util.JVMClusterUtil;
035import org.apache.hadoop.hdfs.DistributedFileSystem;
036import org.apache.hadoop.hdfs.MiniDFSCluster;
037import org.apache.hadoop.hdfs.protocol.HdfsConstants;
038import org.junit.After;
039import org.junit.AfterClass;
040import org.junit.Before;
041import org.junit.BeforeClass;
042import org.junit.ClassRule;
043import org.junit.Test;
044import org.junit.experimental.categories.Category;
045import org.slf4j.Logger;
046import org.slf4j.LoggerFactory;
047
048@Category(MediumTests.class)
049public class TestSafemodeBringsDownMaster {
050
051  @ClassRule
052  public static final HBaseClassTestRule CLASS_RULE =
053    HBaseClassTestRule.forClass(TestSafemodeBringsDownMaster.class);
054
055  private static final Logger LOG = LoggerFactory.getLogger(TestSafemodeBringsDownMaster.class);
056
057  protected static final HBaseTestingUtil UTIL = new HBaseTestingUtil();
058
059  private static void setupConf(Configuration conf) {
060    conf.setInt(MasterProcedureConstants.MASTER_PROCEDURE_THREADS, 1);
061  }
062
063  @BeforeClass
064  public static void setupCluster() throws Exception {
065    setupConf(UTIL.getConfiguration());
066    UTIL.startMiniCluster(1);
067  }
068
069  @AfterClass
070  public static void cleanupTest() throws Exception {
071    try {
072      UTIL.shutdownMiniCluster();
073    } catch (Exception e) {
074      LOG.warn("failure shutting down cluster", e);
075    }
076  }
077
078  @Before
079  public void setup() throws Exception {
080    resetProcExecutorTestingKillFlag();
081  }
082
083  private ProcedureExecutor<MasterProcedureEnv> getMasterProcedureExecutor() {
084    return UTIL.getHBaseCluster().getMaster().getMasterProcedureExecutor();
085  }
086
087  private void resetProcExecutorTestingKillFlag() {
088    final ProcedureExecutor<MasterProcedureEnv> procExec = getMasterProcedureExecutor();
089    ProcedureTestingUtility.setKillAndToggleBeforeStoreUpdate(procExec, false);
090    assertTrue("expected executor to be running", procExec.isRunning());
091  }
092
093  @After
094  public void tearDown() throws Exception {
095  }
096
097  @Test
098  public void testSafemodeBringsDownMaster() throws Exception {
099    final TableName tableName = TableName.valueOf("testSafemodeBringsDownMaster");
100    final byte[][] splitKeys =
101      new byte[][] { Bytes.toBytes("a"), Bytes.toBytes("b"), Bytes.toBytes("c") };
102    RegionInfo[] regions = MasterProcedureTestingUtility.createTable(getMasterProcedureExecutor(),
103      tableName, splitKeys, "f1", "f2");
104    MiniDFSCluster dfsCluster = UTIL.getDFSCluster();
105    DistributedFileSystem dfs = (DistributedFileSystem) dfsCluster.getFileSystem();
106    dfs.setSafeMode(HdfsConstants.SafeModeAction.SAFEMODE_ENTER);
107    final long timeOut = 180000;
108    long startTime = EnvironmentEdgeManager.currentTime();
109    int index = -1;
110    do {
111      index = UTIL.getMiniHBaseCluster().getServerWithMeta();
112    } while (index == -1 && startTime + timeOut < EnvironmentEdgeManager.currentTime());
113
114    if (index != -1) {
115      UTIL.getMiniHBaseCluster().abortRegionServer(index);
116      UTIL.getMiniHBaseCluster().waitOnRegionServer(index);
117    }
118    UTIL.waitFor(timeOut, new Waiter.Predicate<Exception>() {
119      @Override
120      public boolean evaluate() throws Exception {
121        List<JVMClusterUtil.MasterThread> threads =
122          UTIL.getMiniHBaseCluster().getLiveMasterThreads();
123        return threads == null || threads.isEmpty();
124      }
125    });
126    dfs.setSafeMode(HdfsConstants.SafeModeAction.SAFEMODE_LEAVE);
127  }
128}