hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestIncreaseMetaReplicaThroughConfig.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.client;
  19
  20 import static org.junit.Assert.assertEquals;
  21
  22 import org.apache.hadoop.hbase.HBaseClassTestRule;
  23 import org.apache.hadoop.hbase.HConstants;
  24 import org.apache.hadoop.hbase.TableDescriptors;
  25 import org.apache.hadoop.hbase.TableName;
  26 import org.apache.hadoop.hbase.master.HMaster;
  27 import org.apache.hadoop.hbase.testclassification.MediumTests;
  28 import org.apache.hadoop.hbase.testclassification.MiscTests;
  29 import org.junit.BeforeClass;
  30 import org.junit.ClassRule;
  31 import org.junit.Test;
  32 import org.junit.experimental.categories.Category;
  33
  34 /**
  35  * Make sure we will honor the {@link HConstants#META_REPLICAS_NUM}.And also test upgrading.
  36  */
  37 @Category({ MiscTests.class, MediumTests.class })
  38 public class TestIncreaseMetaReplicaThroughConfig extends MetaWithReplicasTestBase {
  39
  40   @ClassRule
  41   public static final HBaseClassTestRule CLASS_RULE =
  42     HBaseClassTestRule.forClass(TestIncreaseMetaReplicaThroughConfig.class);
  43
  44   @BeforeClass
  45   public static void setUp() throws Exception {
  46     startCluster();
  47   }
  48
  49   @Test
  50   public void testUpgradeAndIncreaseReplicaCount() throws Exception {
  51     HMaster oldMaster = TEST_UTIL.getMiniHBaseCluster().getMaster();
  52     TableDescriptors oldTds = oldMaster.getTableDescriptors();
  53     TableDescriptor oldMetaTd = oldTds.get(TableName.META_TABLE_NAME);
  54     assertEquals(3, oldMetaTd.getRegionReplication());
  55     // force update the replica count to 1 and then kill the master, to simulate that hen upgrading,
  56     // we have no region replication in meta table descriptor but we actually have meta region
  57     // replicas
  58     oldTds.update(TableDescriptorBuilder.newBuilder(oldMetaTd).setRegionReplication(1).build());
  59     oldMaster.stop("Restarting");
  60     TEST_UTIL.waitFor(30000, () -> oldMaster.isStopped());
  61
  62     // increase replica count to 5 through Configuration
  63     TEST_UTIL.getMiniHBaseCluster().getConfiguration().setInt(HConstants.META_REPLICAS_NUM, 5);
  64     TEST_UTIL.getMiniHBaseCluster().startMaster();
  65     TEST_UTIL.waitFor(30000,
  66       () -> TEST_UTIL.getZooKeeperWatcher().getMetaReplicaNodes().size() == 5);
  67   }
  68 }