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.rsgroup;
019
020import static org.junit.Assert.assertEquals;
021import static org.junit.Assert.assertFalse;
022import static org.junit.Assert.assertTrue;
023
024import java.util.List;
025import java.util.Map;
026import org.apache.hadoop.hbase.HBaseClassTestRule;
027import org.apache.hadoop.hbase.NamespaceDescriptor;
028import org.apache.hadoop.hbase.ServerName;
029import org.apache.hadoop.hbase.TableName;
030import org.apache.hadoop.hbase.Waiter;
031import org.apache.hadoop.hbase.Waiter.Predicate;
032import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder;
033import org.apache.hadoop.hbase.client.RegionInfo;
034import org.apache.hadoop.hbase.client.TableDescriptor;
035import org.apache.hadoop.hbase.client.TableDescriptorBuilder;
036import org.apache.hadoop.hbase.testclassification.MediumTests;
037import org.apache.hadoop.hbase.util.Bytes;
038import org.junit.After;
039import org.junit.AfterClass;
040import org.junit.Before;
041import org.junit.BeforeClass;
042import org.junit.ClassRule;
043import org.junit.Test;
044import org.junit.experimental.categories.Category;
045import org.slf4j.Logger;
046import org.slf4j.LoggerFactory;
047
048import org.apache.hbase.thirdparty.com.google.common.collect.Sets;
049
050@Category({ MediumTests.class })
051public class TestRSGroupsBalance extends TestRSGroupsBase {
052
053  @ClassRule
054  public static final HBaseClassTestRule CLASS_RULE =
055    HBaseClassTestRule.forClass(TestRSGroupsBalance.class);
056
057  protected static final Logger LOG = LoggerFactory.getLogger(TestRSGroupsBalance.class);
058
059  @BeforeClass
060  public static void setUp() throws Exception {
061    setUpTestBeforeClass();
062  }
063
064  @AfterClass
065  public static void tearDown() throws Exception {
066    tearDownAfterClass();
067  }
068
069  @Before
070  public void beforeMethod() throws Exception {
071    setUpBeforeMethod();
072  }
073
074  @After
075  public void afterMethod() throws Exception {
076    tearDownAfterMethod();
077  }
078
079  @Test
080  public void testGroupBalance() throws Exception {
081    LOG.info(name.getMethodName());
082    String newGroupName = getGroupName(name.getMethodName());
083    addGroup(newGroupName, 3);
084
085    final TableName tableName = TableName.valueOf(tablePrefix + "_ns", name.getMethodName());
086    admin.createNamespace(NamespaceDescriptor.create(tableName.getNamespaceAsString())
087      .addConfiguration(RSGroupInfo.NAMESPACE_DESC_PROP_GROUP, newGroupName).build());
088    final TableDescriptor desc = TableDescriptorBuilder.newBuilder(tableName)
089      .setColumnFamily(ColumnFamilyDescriptorBuilder.of("f")).build();
090    byte[] startKey = Bytes.toBytes("aaaaa");
091    byte[] endKey = Bytes.toBytes("zzzzz");
092    admin.createTable(desc, startKey, endKey, 6);
093    TEST_UTIL.waitFor(WAIT_TIMEOUT, new Waiter.Predicate<Exception>() {
094      @Override
095      public boolean evaluate() throws Exception {
096        List<String> regions = getTableRegionMap().get(tableName);
097        if (regions == null) {
098          return false;
099        }
100        return regions.size() >= 6;
101      }
102    });
103
104    // make assignment uneven, move all regions to one server
105    Map<ServerName, List<String>> assignMap = getTableServerRegionMap().get(tableName);
106    final ServerName first = assignMap.entrySet().iterator().next().getKey();
107    for (RegionInfo region : admin.getRegions(tableName)) {
108      if (!assignMap.get(first).contains(region.getRegionNameAsString())) {
109        admin.move(region.getEncodedNameAsBytes(), first);
110      }
111    }
112    TEST_UTIL.waitFor(WAIT_TIMEOUT, new Waiter.Predicate<Exception>() {
113      @Override
114      public boolean evaluate() throws Exception {
115        Map<ServerName, List<String>> map = getTableServerRegionMap().get(tableName);
116        if (map == null) {
117          return true;
118        }
119        List<String> regions = map.get(first);
120        if (regions == null) {
121          return true;
122        }
123        return regions.size() >= 6;
124      }
125    });
126
127    // balance the other group and make sure it doesn't affect the new group
128    admin.balancerSwitch(true, true);
129    rsGroupAdmin.balanceRSGroup(RSGroupInfo.DEFAULT_GROUP);
130    assertEquals(6, getTableServerRegionMap().get(tableName).get(first).size());
131
132    // disable balance, balancer will not be run and return false
133    admin.balancerSwitch(false, true);
134    assertFalse(rsGroupAdmin.balanceRSGroup(newGroupName));
135    assertEquals(6, getTableServerRegionMap().get(tableName).get(first).size());
136
137    // enable balance
138    admin.balancerSwitch(true, true);
139    rsGroupAdmin.balanceRSGroup(newGroupName);
140    TEST_UTIL.waitFor(WAIT_TIMEOUT, new Waiter.Predicate<Exception>() {
141      @Override
142      public boolean evaluate() throws Exception {
143        for (List<String> regions : getTableServerRegionMap().get(tableName).values()) {
144          if (2 != regions.size()) {
145            return false;
146          }
147        }
148        return true;
149      }
150    });
151    admin.balancerSwitch(false, true);
152  }
153
154  @Test
155  public void testMisplacedRegions() throws Exception {
156    final TableName tableName = TableName.valueOf(tablePrefix + "_testMisplacedRegions");
157    LOG.info("testMisplacedRegions");
158
159    final RSGroupInfo RSGroupInfo = addGroup("testMisplacedRegions", 1);
160
161    TEST_UTIL.createMultiRegionTable(tableName, new byte[] { 'f' }, 15);
162    TEST_UTIL.waitUntilAllRegionsAssigned(tableName);
163
164    rsGroupAdminEndpoint.getGroupInfoManager().moveTables(Sets.newHashSet(tableName),
165      RSGroupInfo.getName());
166
167    admin.balancerSwitch(true, true);
168    assertTrue(rsGroupAdmin.balanceRSGroup(RSGroupInfo.getName()));
169    admin.balancerSwitch(false, true);
170    assertTrue(observer.preBalanceRSGroupCalled);
171    assertTrue(observer.postBalanceRSGroupCalled);
172
173    TEST_UTIL.waitFor(60000, new Predicate<Exception>() {
174      @Override
175      public boolean evaluate() throws Exception {
176        ServerName serverName =
177          ServerName.valueOf(RSGroupInfo.getServers().iterator().next().toString(), 1);
178        return admin.getConnection().getAdmin().getRegions(serverName).size() == 15;
179      }
180    });
181  }
182
183}