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.client;
019
020import static org.junit.Assert.assertEquals;
021
022import java.util.List;
023import org.apache.hadoop.hbase.HBaseClassTestRule;
024import org.apache.hadoop.hbase.HConstants;
025import org.apache.hadoop.hbase.master.HMaster;
026import org.apache.hadoop.hbase.testclassification.MediumTests;
027import org.apache.hadoop.hbase.testclassification.MiscTests;
028import org.apache.hadoop.hbase.util.JVMClusterUtil;
029import org.apache.hadoop.hbase.zookeeper.ZKWatcher;
030import org.junit.BeforeClass;
031import org.junit.ClassRule;
032import org.junit.Test;
033import org.junit.experimental.categories.Category;
034
035/**
036 * Make sure we will honor the {@link HConstants#META_REPLICAS_NUM}.
037 */
038@Category({ MiscTests.class, MediumTests.class })
039public class TestCleanupMetaReplicaThroughConfig extends MetaWithReplicasTestBase {
040
041  @ClassRule
042  public static final HBaseClassTestRule CLASS_RULE =
043    HBaseClassTestRule.forClass(TestCleanupMetaReplicaThroughConfig.class);
044
045  @BeforeClass
046  public static void setUp() throws Exception {
047    startCluster();
048  }
049
050  @Test
051  public void testReplicaCleanup() throws Exception {
052    ZKWatcher zkw = TEST_UTIL.getZooKeeperWatcher();
053    List<String> metaReplicaZnodes = zkw.getMetaReplicaNodes();
054    assertEquals(3, metaReplicaZnodes.size());
055
056    final HMaster master = TEST_UTIL.getMiniHBaseCluster().getMaster();
057    master.stop("Restarting");
058    TEST_UTIL.waitFor(30000, () -> master.isStopped());
059    TEST_UTIL.getMiniHBaseCluster().getConfiguration().setInt(HConstants.META_REPLICAS_NUM, 1);
060
061    JVMClusterUtil.MasterThread newMasterThread = TEST_UTIL.getMiniHBaseCluster().startMaster();
062    final HMaster newMaster = newMasterThread.getMaster();
063
064    // wait until new master finished meta replica assignment logic
065    TEST_UTIL.waitFor(30000, () -> newMaster.getMasterQuotaManager() != null);
066    TEST_UTIL.waitFor(30000,
067      () -> TEST_UTIL.getZooKeeperWatcher().getMetaReplicaNodes().size() == 1);
068  }
069}