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.assignment;
019
020import static org.junit.Assert.assertFalse;
021import static org.junit.Assert.fail;
022
023import java.io.IOException;
024import java.util.List;
025import java.util.concurrent.locks.ReentrantLock;
026import java.util.stream.Collectors;
027import java.util.stream.IntStream;
028import java.util.stream.Stream;
029import org.apache.hadoop.hbase.HBaseClassTestRule;
030import org.apache.hadoop.hbase.HBaseIOException;
031import org.apache.hadoop.hbase.HBaseTestingUtility;
032import org.apache.hadoop.hbase.TableName;
033import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder;
034import org.apache.hadoop.hbase.client.RegionInfo;
035import org.apache.hadoop.hbase.client.RegionReplicaUtil;
036import org.apache.hadoop.hbase.client.TableDescriptorBuilder;
037import org.apache.hadoop.hbase.master.HMaster;
038import org.apache.hadoop.hbase.master.procedure.MasterProcedureEnv;
039import org.apache.hadoop.hbase.testclassification.MasterTests;
040import org.apache.hadoop.hbase.testclassification.MediumTests;
041import org.apache.hadoop.hbase.util.Bytes;
042import org.junit.After;
043import org.junit.AfterClass;
044import org.junit.BeforeClass;
045import org.junit.ClassRule;
046import org.junit.Test;
047import org.junit.experimental.categories.Category;
048
049@Category({ MasterTests.class, MediumTests.class })
050public class TestAssignmentManagerUtil {
051  @ClassRule
052  public static final HBaseClassTestRule CLASS_RULE =
053    HBaseClassTestRule.forClass(TestAssignmentManagerUtil.class);
054
055  private static final HBaseTestingUtility UTIL = new HBaseTestingUtility();
056
057  private static TableName TABLE_NAME = TableName.valueOf("AM");
058
059  private static MasterProcedureEnv ENV;
060
061  private static AssignmentManager AM;
062
063  private static int REGION_REPLICATION = 3;
064
065  @BeforeClass
066  public static void setUp() throws Exception {
067    UTIL.startMiniCluster(1);
068    UTIL.getAdmin().balancerSwitch(false, true);
069    UTIL.createTable(TableDescriptorBuilder.newBuilder(TABLE_NAME)
070      .setColumnFamily(ColumnFamilyDescriptorBuilder.of("cf"))
071      .setRegionReplication(REGION_REPLICATION).build(), new byte[][] { Bytes.toBytes(0) });
072    UTIL.waitTableAvailable(TABLE_NAME);
073    HMaster master = UTIL.getMiniHBaseCluster().getMaster();
074    ENV = master.getMasterProcedureExecutor().getEnvironment();
075    AM = master.getAssignmentManager();
076  }
077
078  @After
079  public void tearDownAfterTest() throws IOException {
080    for (RegionInfo region : UTIL.getAdmin().getRegions(TABLE_NAME)) {
081      RegionStateNode regionNode = AM.getRegionStates().getRegionStateNode(region);
082      // confirm that we have released the lock
083      assertFalse(((ReentrantLock) regionNode.lock).isLocked());
084      TransitRegionStateProcedure proc = regionNode.getProcedure();
085      if (proc != null) {
086        regionNode.unsetProcedure(proc);
087      }
088    }
089  }
090
091  @AfterClass
092  public static void tearDown() throws Exception {
093    UTIL.shutdownMiniCluster();
094  }
095
096  private List<RegionInfo> getPrimaryRegions() throws IOException {
097    return UTIL.getAdmin().getRegions(TABLE_NAME).stream()
098      .filter(r -> RegionReplicaUtil.isDefaultReplica(r)).collect(Collectors.toList());
099  }
100
101  @Test
102  public void testCreateUnassignProcedureForSplitFail() throws IOException {
103    RegionInfo region = getPrimaryRegions().get(0);
104    AM.getRegionStates().getRegionStateNode(region)
105      .setProcedure(TransitRegionStateProcedure.unassign(ENV, region));
106    try {
107      AssignmentManagerUtil.createUnassignProceduresForSplitOrMerge(ENV, Stream.of(region),
108        REGION_REPLICATION);
109      fail("Should fail as the region is in transition");
110    } catch (HBaseIOException e) {
111      // expected
112    }
113  }
114
115  @Test
116  public void testCreateUnassignProceduresForMergeFail() throws IOException {
117    List<RegionInfo> regions = getPrimaryRegions();
118    RegionInfo regionA = regions.get(0);
119    RegionInfo regionB = regions.get(1);
120    AM.getRegionStates().getRegionStateNode(regionB)
121      .setProcedure(TransitRegionStateProcedure.unassign(ENV, regionB));
122    try {
123      AssignmentManagerUtil.createUnassignProceduresForSplitOrMerge(ENV,
124        Stream.of(regionA, regionB), REGION_REPLICATION);
125      fail("Should fail as the region is in transition");
126    } catch (HBaseIOException e) {
127      // expected
128    }
129    IntStream.range(0, REGION_REPLICATION)
130      .mapToObj(i -> RegionReplicaUtil.getRegionInfoForReplica(regionA, i))
131      .map(AM.getRegionStates()::getRegionStateNode).forEachOrdered(
132        rn -> assertFalse("Should have unset the proc for " + rn, rn.isInTransition()));
133  }
134}