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.apache.zookeeper.KeeperException;
039import org.junit.AfterClass;
040import org.junit.BeforeClass;
041import org.junit.ClassRule;
042import org.junit.Test;
043import org.junit.experimental.categories.Category;
044
045import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos.RegionStateTransition.TransitionCode;
046import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos.ReportRegionStateTransitionRequest;
047import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos.ReportRegionStateTransitionResponse;
048
049@Category({ MasterTests.class, MediumTests.class })
050public class TestCloseAnOpeningRegion {
051
052  @ClassRule
053  public static final HBaseClassTestRule CLASS_RULE =
054    HBaseClassTestRule.forClass(TestCloseAnOpeningRegion.class);
055
056  private static final HBaseTestingUtility UTIL = new HBaseTestingUtility();
057
058  private static TableName TABLE_NAME = TableName.valueOf("race");
059
060  private static byte[] CF = Bytes.toBytes("cf");
061
062  private static volatile CountDownLatch ARRIVE;
063
064  private static volatile CountDownLatch RESUME;
065
066  public static final class MockHMaster extends HMaster {
067
068    public MockHMaster(Configuration conf) throws IOException, KeeperException {
069      super(conf);
070    }
071
072    @Override
073    protected AssignmentManager createAssignmentManager(MasterServices master) {
074      return new AssignmentManager(master) {
075
076        @Override
077        public ReportRegionStateTransitionResponse reportRegionStateTransition(
078            ReportRegionStateTransitionRequest req) throws PleaseHoldException {
079          ReportRegionStateTransitionResponse resp = super.reportRegionStateTransition(req);
080          TransitionCode code = req.getTransition(0).getTransitionCode();
081          if (code == TransitionCode.OPENED && ARRIVE != null) {
082            ARRIVE.countDown();
083            try {
084              RESUME.await();
085            } catch (InterruptedException e) {
086              throw new RuntimeException(e);
087            }
088          }
089          return resp;
090        }
091      };
092    }
093  }
094
095  @BeforeClass
096  public static void setUp() throws Exception {
097    UTIL.getConfiguration().setInt(HConstants.HBASE_RPC_SHORTOPERATION_TIMEOUT_KEY, 60000);
098    UTIL.startMiniCluster(
099      StartMiniClusterOption.builder().numRegionServers(2).masterClass(MockHMaster.class).build());
100    UTIL.createTable(TABLE_NAME, CF);
101    UTIL.getAdmin().balancerSwitch(false, true);
102  }
103
104  @AfterClass
105  public static void tearDown() throws Exception {
106    UTIL.shutdownMiniCluster();
107  }
108
109  @Test
110  public void test() throws IOException, InterruptedException {
111    ARRIVE = new CountDownLatch(1);
112    RESUME = new CountDownLatch(1);
113    RegionInfo region = UTIL.getAdmin().getRegions(TABLE_NAME).get(0);
114    HRegionServer src = UTIL.getRSForFirstRegionInTable(TABLE_NAME);
115    HRegionServer dst = UTIL.getOtherRegionServer(src);
116    Thread move0 = new Thread(() -> {
117      try {
118        UTIL.getAdmin().move(region.getEncodedNameAsBytes(), dst.getServerName());
119      } catch (IOException e) {
120        throw new UncheckedIOException(e);
121      }
122    });
123    move0.start();
124    ARRIVE.await();
125    Thread move1 = new Thread(() -> {
126      try {
127        UTIL.getAdmin().move(region.getEncodedNameAsBytes(), src.getServerName());
128      } catch (IOException e) {
129        throw new UncheckedIOException(e);
130      }
131    });
132    move1.start();
133    // No simple way to determine when it is safe to go on and produce the race so let's sleep for a
134    // well...
135    Thread.sleep(10000);
136    RESUME.countDown();
137    move0.join();
138    move1.join();
139    try (Table table = UTIL.getConnection().getTable(TABLE_NAME)) {
140      // make sure that we can write to the table, which means the region is online
141      table.put(new Put(Bytes.toBytes(0)).addColumn(CF, Bytes.toBytes("cq"), Bytes.toBytes(0)));
142    }
143  }
144}