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 java.io.IOException;
021import java.io.UncheckedIOException;
022import java.util.concurrent.CountDownLatch;
023import org.apache.hadoop.conf.Configuration;
024import org.apache.hadoop.hbase.HBaseClassTestRule;
025import org.apache.hadoop.hbase.HBaseTestingUtility;
026import org.apache.hadoop.hbase.HConstants;
027import org.apache.hadoop.hbase.PleaseHoldException;
028import org.apache.hadoop.hbase.StartMiniClusterOption;
029import org.apache.hadoop.hbase.TableName;
030import org.apache.hadoop.hbase.client.Put;
031import org.apache.hadoop.hbase.client.RegionInfo;
032import org.apache.hadoop.hbase.client.Table;
033import org.apache.hadoop.hbase.master.assignment.AssignmentManager;
034import org.apache.hadoop.hbase.regionserver.HRegionServer;
035import org.apache.hadoop.hbase.testclassification.MasterTests;
036import org.apache.hadoop.hbase.testclassification.MediumTests;
037import org.apache.hadoop.hbase.util.Bytes;
038import org.junit.AfterClass;
039import org.junit.BeforeClass;
040import org.junit.ClassRule;
041import org.junit.Test;
042import org.junit.experimental.categories.Category;
043
044import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos.RegionStateTransition.TransitionCode;
045import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos.ReportRegionStateTransitionRequest;
046import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos.ReportRegionStateTransitionResponse;
047
048@Category({ MasterTests.class, MediumTests.class })
049public class TestCloseAnOpeningRegion {
050
051  @ClassRule
052  public static final HBaseClassTestRule CLASS_RULE =
053    HBaseClassTestRule.forClass(TestCloseAnOpeningRegion.class);
054
055  private static final HBaseTestingUtility UTIL = new HBaseTestingUtility();
056
057  private static TableName TABLE_NAME = TableName.valueOf("race");
058
059  private static byte[] CF = Bytes.toBytes("cf");
060
061  private static volatile CountDownLatch ARRIVE;
062
063  private static volatile CountDownLatch RESUME;
064
065  public static final class MockHMaster extends HMaster {
066
067    public MockHMaster(Configuration conf) throws IOException {
068      super(conf);
069    }
070
071    @Override
072    protected AssignmentManager createAssignmentManager(MasterServices master) {
073      return new AssignmentManager(master) {
074
075        @Override
076        public ReportRegionStateTransitionResponse reportRegionStateTransition(
077            ReportRegionStateTransitionRequest req) throws PleaseHoldException {
078          ReportRegionStateTransitionResponse resp = super.reportRegionStateTransition(req);
079          TransitionCode code = req.getTransition(0).getTransitionCode();
080          if (code == TransitionCode.OPENED && ARRIVE != null) {
081            ARRIVE.countDown();
082            try {
083              RESUME.await();
084            } catch (InterruptedException e) {
085              throw new RuntimeException(e);
086            }
087          }
088          return resp;
089        }
090      };
091    }
092  }
093
094  @BeforeClass
095  public static void setUp() throws Exception {
096    UTIL.getConfiguration().setInt(HConstants.HBASE_RPC_SHORTOPERATION_TIMEOUT_KEY, 60000);
097    UTIL.startMiniCluster(
098      StartMiniClusterOption.builder().numRegionServers(2).masterClass(MockHMaster.class).build());
099    UTIL.createTable(TABLE_NAME, CF);
100    UTIL.getAdmin().balancerSwitch(false, true);
101  }
102
103  @AfterClass
104  public static void tearDown() throws Exception {
105    UTIL.shutdownMiniCluster();
106  }
107
108  @Test
109  public void test() throws IOException, InterruptedException {
110    ARRIVE = new CountDownLatch(1);
111    RESUME = new CountDownLatch(1);
112    RegionInfo region = UTIL.getAdmin().getRegions(TABLE_NAME).get(0);
113    HRegionServer src = UTIL.getRSForFirstRegionInTable(TABLE_NAME);
114    HRegionServer dst = UTIL.getOtherRegionServer(src);
115    Thread move0 = new Thread(() -> {
116      try {
117        UTIL.getAdmin().move(region.getEncodedNameAsBytes(), dst.getServerName());
118      } catch (IOException e) {
119        throw new UncheckedIOException(e);
120      }
121    });
122    move0.start();
123    ARRIVE.await();
124    Thread move1 = new Thread(() -> {
125      try {
126        UTIL.getAdmin().move(region.getEncodedNameAsBytes(), src.getServerName());
127      } catch (IOException e) {
128        throw new UncheckedIOException(e);
129      }
130    });
131    move1.start();
132    // No simple way to determine when it is safe to go on and produce the race so let's sleep for a
133    // well...
134    Thread.sleep(10000);
135    RESUME.countDown();
136    move0.join();
137    move1.join();
138    try (Table table = UTIL.getConnection().getTable(TABLE_NAME)) {
139      // make sure that we can write to the table, which means the region is online
140      table.put(new Put(Bytes.toBytes(0)).addColumn(CF, Bytes.toBytes("cq"), Bytes.toBytes(0)));
141    }
142  }
143}