hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestCloseAnOpeningRegion.java

   1 /**
   2  * Licensed to the Apache Software Foundation (ASF) under one
   3  * or more contributor license agreements.  See the NOTICE file
   4  * distributed with this work for additional information
   5  * regarding copyright ownership.  The ASF licenses this file
   6  * to you under the Apache License, Version 2.0 (the
   7  * "License"); you may not use this file except in compliance
   8  * with the License.  You may obtain a copy of the License at
   9  *
  10  *     http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  */
  18 package org.apache.hadoop.hbase.master;
  19
  20 import java.io.IOException;
  21 import java.io.UncheckedIOException;
  22 import java.util.concurrent.CountDownLatch;
  23 import org.apache.hadoop.conf.Configuration;
  24 import org.apache.hadoop.hbase.HBaseClassTestRule;
  25 import org.apache.hadoop.hbase.HBaseTestingUtility;
  26 import org.apache.hadoop.hbase.HConstants;
  27 import org.apache.hadoop.hbase.PleaseHoldException;
  28 import org.apache.hadoop.hbase.StartMiniClusterOption;
  29 import org.apache.hadoop.hbase.TableName;
  30 import org.apache.hadoop.hbase.client.Put;
  31 import org.apache.hadoop.hbase.client.RegionInfo;
  32 import org.apache.hadoop.hbase.client.Table;
  33 import org.apache.hadoop.hbase.master.assignment.AssignmentManager;
  34 import org.apache.hadoop.hbase.regionserver.HRegionServer;
  35 import org.apache.hadoop.hbase.testclassification.MasterTests;
  36 import org.apache.hadoop.hbase.testclassification.MediumTests;
  37 import org.apache.hadoop.hbase.util.Bytes;
  38 import org.junit.AfterClass;
  39 import org.junit.BeforeClass;
  40 import org.junit.ClassRule;
  41 import org.junit.Test;
  42 import org.junit.experimental.categories.Category;
  43
  44 import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos.RegionStateTransition.TransitionCode;
  45 import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos.ReportRegionStateTransitionRequest;
  46 import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos.ReportRegionStateTransitionResponse;
  47
  48 @Category({ MasterTests.class, MediumTests.class })
  49 public class TestCloseAnOpeningRegion {
  50
  51   @ClassRule
  52   public static final HBaseClassTestRule CLASS_RULE =
  53     HBaseClassTestRule.forClass(TestCloseAnOpeningRegion.class);
  54
  55   private static final HBaseTestingUtility UTIL = new HBaseTestingUtility();
  56
  57   private static TableName TABLE_NAME = TableName.valueOf("race");
  58
  59   private static byte[] CF = Bytes.toBytes("cf");
  60
  61   private static volatile CountDownLatch ARRIVE;
  62
  63   private static volatile CountDownLatch RESUME;
  64
  65   public static final class MockHMaster extends HMaster {
  66
  67     public MockHMaster(Configuration conf) throws IOException {
  68       super(conf);
  69     }
  70
  71     @Override
  72     protected AssignmentManager createAssignmentManager(MasterServices master) {
  73       return new AssignmentManager(master) {
  74
  75         @Override
  76         public ReportRegionStateTransitionResponse reportRegionStateTransition(
  77             ReportRegionStateTransitionRequest req) throws PleaseHoldException {
  78           ReportRegionStateTransitionResponse resp = super.reportRegionStateTransition(req);
  79           TransitionCode code = req.getTransition(0).getTransitionCode();
  80           if (code == TransitionCode.OPENED && ARRIVE != null) {
  81             ARRIVE.countDown();
  82             try {
  83               RESUME.await();
  84             } catch (InterruptedException e) {
  85               throw new RuntimeException(e);
  86             }
  87           }
  88           return resp;
  89         }
  90       };
  91     }
  92   }
  93
  94   @BeforeClass
  95   public static void setUp() throws Exception {
  96     UTIL.getConfiguration().setInt(HConstants.HBASE_RPC_SHORTOPERATION_TIMEOUT_KEY, 60000);
  97     UTIL.startMiniCluster(
  98       StartMiniClusterOption.builder().numRegionServers(2).masterClass(MockHMaster.class).build());
  99     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 }