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