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.HConstants;
028import org.apache.hadoop.hbase.NamespaceDescriptor;
029import org.apache.hadoop.hbase.ServerName;
030import org.apache.hadoop.hbase.TableName;
031import org.apache.hadoop.hbase.Waiter;
032import org.apache.hadoop.hbase.Waiter.Predicate;
033import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder;
034import org.apache.hadoop.hbase.client.RegionInfo;
035import org.apache.hadoop.hbase.client.TableDescriptor;
036import org.apache.hadoop.hbase.client.TableDescriptorBuilder;
037import org.apache.hadoop.hbase.master.HMaster;
038import org.apache.hadoop.hbase.testclassification.MediumTests;
039import org.apache.hadoop.hbase.util.Bytes;
040import org.junit.After;
041import org.junit.AfterClass;
042import org.junit.Before;
043import org.junit.BeforeClass;
044import org.junit.ClassRule;
045import org.junit.Test;
046import org.junit.experimental.categories.Category;
047import org.slf4j.Logger;
048import org.slf4j.LoggerFactory;
049
050import org.apache.hbase.thirdparty.com.google.common.collect.Sets;
051
052@Category({ MediumTests.class })
053public class TestRSGroupsBalance extends TestRSGroupsBase {
054
055  @ClassRule
056  public static final HBaseClassTestRule CLASS_RULE =
057    HBaseClassTestRule.forClass(TestRSGroupsBalance.class);
058
059  protected static final Logger LOG = LoggerFactory.getLogger(TestRSGroupsBalance.class);
060
061  @BeforeClass
062  public static void setUp() throws Exception {
063    setUpTestBeforeClass();
064  }
065
066  @AfterClass
067  public static void tearDown() throws Exception {
068    tearDownAfterClass();
069  }
070
071  @Before
072  public void beforeMethod() throws Exception {
073    setUpBeforeMethod();
074  }
075
076  @After
077  public void afterMethod() throws Exception {
078    tearDownAfterMethod();
079  }
080
081  @Test
082  public void testGroupBalance() throws Exception {
083    LOG.info(name.getMethodName());
084    String newGroupName = getGroupName(name.getMethodName());
085    addGroup(newGroupName, 3);
086
087    final TableName tableName = TableName.valueOf(tablePrefix + "_ns", name.getMethodName());
088    admin.createNamespace(NamespaceDescriptor.create(tableName.getNamespaceAsString())
089      .addConfiguration(RSGroupInfo.NAMESPACE_DESC_PROP_GROUP, newGroupName).build());
090    final TableDescriptor desc = TableDescriptorBuilder.newBuilder(tableName)
091      .setColumnFamily(ColumnFamilyDescriptorBuilder.of("f")).build();
092    byte[] startKey = Bytes.toBytes("aaaaa");
093    byte[] endKey = Bytes.toBytes("zzzzz");
094    admin.createTable(desc, startKey, endKey, 6);
095    TEST_UTIL.waitFor(WAIT_TIMEOUT, new Waiter.Predicate<Exception>() {
096      @Override
097      public boolean evaluate() throws Exception {
098        List<String> regions = getTableRegionMap().get(tableName);
099        if (regions == null) {
100          return false;
101        }
102        return regions.size() >= 6;
103      }
104    });
105
106    // make assignment uneven, move all regions to one server
107    Map<ServerName, List<String>> assignMap = getTableServerRegionMap().get(tableName);
108    final ServerName first = assignMap.entrySet().iterator().next().getKey();
109    for (RegionInfo region : admin.getRegions(tableName)) {
110      if (!assignMap.get(first).contains(region.getRegionNameAsString())) {
111        admin.move(region.getEncodedNameAsBytes(), first);
112      }
113    }
114    TEST_UTIL.waitFor(WAIT_TIMEOUT, new Waiter.Predicate<Exception>() {
115      @Override
116      public boolean evaluate() throws Exception {
117        Map<ServerName, List<String>> map = getTableServerRegionMap().get(tableName);
118        if (map == null) {
119          return true;
120        }
121        List<String> regions = map.get(first);
122        if (regions == null) {
123          return true;
124        }
125        return regions.size() >= 6;
126      }
127    });
128
129    // balance the other group and make sure it doesn't affect the new group
130    admin.balancerSwitch(true, true);
131    rsGroupAdmin.balanceRSGroup(RSGroupInfo.DEFAULT_GROUP);
132    assertEquals(6, getTableServerRegionMap().get(tableName).get(first).size());
133
134    // disable balance, balancer will not be run and return false
135    admin.balancerSwitch(false, true);
136    assertFalse(rsGroupAdmin.balanceRSGroup(newGroupName));
137    assertEquals(6, getTableServerRegionMap().get(tableName).get(first).size());
138
139    // enable balance
140    admin.balancerSwitch(true, true);
141    rsGroupAdmin.balanceRSGroup(newGroupName);
142    TEST_UTIL.waitFor(WAIT_TIMEOUT, new Waiter.Predicate<Exception>() {
143      @Override
144      public boolean evaluate() throws Exception {
145        for (List<String> regions : getTableServerRegionMap().get(tableName).values()) {
146          if (2 != regions.size()) {
147            return false;
148          }
149        }
150        return true;
151      }
152    });
153    admin.balancerSwitch(false, true);
154  }
155
156  @Test
157  public void testMisplacedRegions() throws Exception {
158    final TableName tableName = TableName.valueOf(tablePrefix + "_testMisplacedRegions");
159    LOG.info("testMisplacedRegions");
160
161    final RSGroupInfo RSGroupInfo = addGroup("testMisplacedRegions", 1);
162
163    TEST_UTIL.createMultiRegionTable(tableName, new byte[] { 'f' }, 15);
164    TEST_UTIL.waitUntilAllRegionsAssigned(tableName);
165
166    rsGroupAdminEndpoint.getGroupInfoManager().moveTables(Sets.newHashSet(tableName),
167      RSGroupInfo.getName());
168
169    admin.balancerSwitch(true, true);
170    assertTrue(rsGroupAdmin.balanceRSGroup(RSGroupInfo.getName()));
171    admin.balancerSwitch(false, true);
172    assertTrue(observer.preBalanceRSGroupCalled);
173    assertTrue(observer.postBalanceRSGroupCalled);
174
175    TEST_UTIL.waitFor(60000, new Predicate<Exception>() {
176      @Override
177      public boolean evaluate() throws Exception {
178        ServerName serverName =
179          ServerName.valueOf(RSGroupInfo.getServers().iterator().next().toString(), 1);
180        return admin.getConnection().getAdmin().getRegions(serverName).size() == 15;
181      }
182    });
183  }
184
185  @Test
186  public void testGetRSGroupAssignmentsByTable() throws Exception {
187    final TableName tableName = TableName.valueOf(name.getMethodName());
188    TEST_UTIL.createMultiRegionTable(tableName, HConstants.CATALOG_FAMILY, 10);
189    // disable table
190    final TableName disableTableName = TableName.valueOf("testDisableTable");
191    TEST_UTIL.createMultiRegionTable(disableTableName, HConstants.CATALOG_FAMILY, 10);
192    TEST_UTIL.getAdmin().disableTable(disableTableName);
193
194    HMaster master = TEST_UTIL.getMiniHBaseCluster().getMaster();
195    Map<TableName, Map<ServerName, List<RegionInfo>>> assignments =
196        rsGroupAdminEndpoint.getGroupAdminServer()
197            .getRSGroupAssignmentsByTable(master.getTableStateManager(), RSGroupInfo.DEFAULT_GROUP);
198    assertFalse(assignments.containsKey(disableTableName));
199    assertTrue(assignments.containsKey(tableName));
200  }
201}