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.balancer;
019
020import static org.apache.hadoop.hbase.favored.FavoredNodeAssignmentHelper.FAVORED_NODES_NUM;
021import static org.junit.Assert.assertEquals;
022import static org.junit.Assert.assertNotNull;
023import static org.junit.Assert.assertTrue;
024import java.util.List;
025import java.util.Set;
026import org.apache.hadoop.conf.Configuration;
027import org.apache.hadoop.hbase.HBaseClassTestRule;
028import org.apache.hadoop.hbase.HBaseTestingUtility;
029import org.apache.hadoop.hbase.HColumnDescriptor;
030import org.apache.hadoop.hbase.HConstants;
031import org.apache.hadoop.hbase.HRegionInfo;
032import org.apache.hadoop.hbase.HTableDescriptor;
033import org.apache.hadoop.hbase.ServerName;
034import org.apache.hadoop.hbase.TableName;
035import org.apache.hadoop.hbase.client.Admin;
036import org.apache.hadoop.hbase.favored.FavoredNodesManager;
037import org.apache.hadoop.hbase.master.HMaster;
038import org.apache.hadoop.hbase.testclassification.MediumTests;
039import org.apache.hadoop.hbase.util.Bytes;
040import org.apache.hadoop.hbase.util.Threads;
041import org.junit.After;
042import org.junit.ClassRule;
043import org.junit.Test;
044import org.junit.experimental.categories.Category;
045import org.slf4j.Logger;
046import org.slf4j.LoggerFactory;
047import org.apache.hbase.thirdparty.com.google.common.collect.Sets;
048
049/*
050 * This case tests a scenario when a cluster with tables is moved from Stochastic Load Balancer
051 * to FavoredStochasticLoadBalancer and the generation of favored nodes after switch.
052 */
053@Category(MediumTests.class)
054public class TestFavoredNodeTableImport {
055
056  @ClassRule
057  public static final HBaseClassTestRule CLASS_RULE =
058      HBaseClassTestRule.forClass(TestFavoredNodeTableImport.class);
059
060  private static final Logger LOG = LoggerFactory.getLogger(TestFavoredNodeTableImport.class);
061
062  private static final int SLAVES = 3;
063  private static final int REGION_NUM = 20;
064  private static final HBaseTestingUtility UTIL = new HBaseTestingUtility();
065  private static final Configuration conf = UTIL.getConfiguration();
066
067  @After
068  public void stopCluster() throws Exception {
069    UTIL.shutdownMiniCluster();
070  }
071
072  @Test
073  public void testTableCreation() throws Exception {
074
075    conf.set(HConstants.HBASE_MASTER_LOADBALANCER_CLASS, StochasticLoadBalancer.class.getName());
076
077    LOG.info("Starting up cluster");
078    UTIL.startMiniCluster(SLAVES);
079    while (!UTIL.getMiniHBaseCluster().getMaster().isInitialized()) {
080      Threads.sleep(1);
081    }
082    Admin admin = UTIL.getAdmin();
083    admin.balancerSwitch(false, true);
084
085    String tableName = "testFNImport";
086    HTableDescriptor desc = new HTableDescriptor(TableName.valueOf(tableName));
087    desc.addFamily(new HColumnDescriptor(HConstants.CATALOG_FAMILY));
088    admin.createTable(desc, Bytes.toBytes("a"), Bytes.toBytes("z"), REGION_NUM);
089    UTIL.waitTableAvailable(desc.getTableName());
090    admin.balancerSwitch(true, true);
091
092    LOG.info("Shutting down cluster");
093    UTIL.shutdownMiniHBaseCluster();
094
095    Thread.sleep(2000);
096    LOG.info("Starting cluster again with FN Balancer");
097    UTIL.getConfiguration().set(HConstants.HBASE_MASTER_LOADBALANCER_CLASS,
098        FavoredStochasticBalancer.class.getName());
099    UTIL.restartHBaseCluster(SLAVES);
100    HMaster master = UTIL.getMiniHBaseCluster().getMaster();
101    while (!master.isInitialized()) {
102      Threads.sleep(1);
103    }
104    UTIL.waitTableAvailable(desc.getTableName());
105    UTIL.waitUntilNoRegionsInTransition(10000);
106    assertTrue(master.isBalancerOn());
107
108    FavoredNodesManager fnm = master.getFavoredNodesManager();
109    assertNotNull(fnm);
110
111    admin = UTIL.getAdmin();
112    List<HRegionInfo> regionsOfTable = admin.getTableRegions(TableName.valueOf(tableName));
113    for (HRegionInfo rInfo : regionsOfTable) {
114      assertNotNull(rInfo);
115      assertNotNull(fnm);
116      List<ServerName> fns = fnm.getFavoredNodes(rInfo);
117      LOG.info("FNS {} {}", rInfo, fns);
118      assertNotNull(rInfo.toString(), fns);
119      Set<ServerName> favNodes = Sets.newHashSet(fns);
120      assertNotNull(favNodes);
121      assertEquals("Required no of favored nodes not found.", FAVORED_NODES_NUM, favNodes.size());
122      for (ServerName fn : favNodes) {
123        assertEquals("StartCode invalid for:" + fn, ServerName.NON_STARTCODE, fn.getStartcode());
124      }
125    }
126  }
127}