| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.hbase.master; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertNotNull; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.util.List; |
| |
| import org.apache.hadoop.hbase.HBaseClassTestRule; |
| import org.apache.hadoop.hbase.HConstants; |
| import org.apache.hadoop.hbase.MiniHBaseCluster; |
| import org.apache.hadoop.hbase.ServerName; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.client.RegionInfo; |
| import org.apache.hadoop.hbase.testclassification.MasterTests; |
| import org.apache.hadoop.hbase.testclassification.MediumTests; |
| import org.apache.hadoop.hbase.util.JVMClusterUtil; |
| import org.junit.ClassRule; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| @Category({ MasterTests.class, MediumTests.class }) |
| public class TestRoundRobinAssignmentOnRestart extends AbstractTestRestartCluster { |
| |
| @ClassRule |
| public static final HBaseClassTestRule CLASS_RULE = |
| HBaseClassTestRule.forClass(TestRoundRobinAssignmentOnRestart.class); |
| |
| private static final Logger LOG = |
| LoggerFactory.getLogger(TestRoundRobinAssignmentOnRestart.class); |
| |
| @Override |
| protected boolean splitWALCoordinatedByZk() { |
| return true; |
| } |
| |
| private final int regionNum = 10; |
| private final int rsNum = 2; |
| |
| /** |
| * This tests retaining assignments on a cluster restart |
| */ |
| @Test |
| public void test() throws Exception { |
| UTIL.startMiniCluster(rsNum); |
| // Turn off balancer |
| UTIL.getMiniHBaseCluster().getMaster().getMasterRpcServices().synchronousBalanceSwitch(false); |
| LOG.info("\n\nCreating tables"); |
| for (TableName TABLE : TABLES) { |
| UTIL.createMultiRegionTable(TABLE, FAMILY, regionNum); |
| } |
| // Wait until all regions are assigned |
| for (TableName TABLE : TABLES) { |
| UTIL.waitTableEnabled(TABLE); |
| } |
| UTIL.waitUntilNoRegionsInTransition(60000); |
| |
| MiniHBaseCluster cluster = UTIL.getHBaseCluster(); |
| List<JVMClusterUtil.RegionServerThread> threads = cluster.getLiveRegionServerThreads(); |
| assertEquals(2, threads.size()); |
| |
| ServerName testServer = threads.get(0).getRegionServer().getServerName(); |
| int port = testServer.getPort(); |
| List<RegionInfo> regionInfos = |
| cluster.getMaster().getAssignmentManager().getRegionsOnServer(testServer); |
| LOG.debug("RegionServer {} has {} regions", testServer, regionInfos.size()); |
| assertTrue(regionInfos.size() >= (TABLES.length * regionNum / rsNum)); |
| |
| // Restart 1 regionserver |
| cluster.stopRegionServer(testServer); |
| cluster.waitForRegionServerToStop(testServer, 60000); |
| cluster.getConf().setInt(HConstants.REGIONSERVER_PORT, port); |
| cluster.startRegionServer(); |
| |
| HMaster master = UTIL.getMiniHBaseCluster().getMaster(); |
| List<ServerName> localServers = master.getServerManager().getOnlineServersList(); |
| ServerName newTestServer = null; |
| for (ServerName serverName : localServers) { |
| if (serverName.getAddress().equals(testServer.getAddress())) { |
| newTestServer = serverName; |
| break; |
| } |
| } |
| assertNotNull(newTestServer); |
| |
| // Wait until all regions are assigned |
| for (TableName TABLE : TABLES) { |
| UTIL.waitTableAvailable(TABLE); |
| } |
| UTIL.waitUntilNoRegionsInTransition(60000); |
| |
| List<RegionInfo> newRegionInfos = |
| cluster.getMaster().getAssignmentManager().getRegionsOnServer(newTestServer); |
| LOG.debug("RegionServer {} has {} regions", newTestServer, newRegionInfos.size()); |
| assertTrue("Should not retain all regions when restart", |
| newRegionInfos.size() < regionInfos.size()); |
| } |
| } |