saintstack commented on a change in pull request #1866: URL: https://github.com/apache/hbase/pull/1866#discussion_r436981312
########## File path: hbase-server/src/test/java/org/apache/hadoop/hbase/master/assignment/TestAssignmentManagerLoadMetaRegionState.java ########## @@ -0,0 +1,76 @@ +/** + * 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.assignment; + +import static org.junit.Assert.assertEquals; +import static org.junit.Assert.assertTrue; + +import java.io.IOException; +import java.util.HashSet; +import java.util.List; +import java.util.Set; +import org.apache.hadoop.hbase.HBaseClassTestRule; +import org.apache.hadoop.hbase.HBaseTestingUtility; +import org.apache.hadoop.hbase.ServerName; +import org.apache.hadoop.hbase.client.RegionInfo; +import org.apache.hadoop.hbase.master.HMaster; +import org.apache.hadoop.hbase.testclassification.MasterTests; +import org.apache.hadoop.hbase.testclassification.MediumTests; +import org.junit.AfterClass; +import org.junit.BeforeClass; +import org.junit.ClassRule; +import org.junit.Test; +import org.junit.experimental.categories.Category; + +@Category({ MasterTests.class, MediumTests.class }) +public class TestAssignmentManagerLoadMetaRegionState { + + @ClassRule + public static final HBaseClassTestRule CLASS_RULE = + HBaseClassTestRule.forClass(TestAssignmentManagerLoadMetaRegionState.class); + + private static final HBaseTestingUtility UTIL = new HBaseTestingUtility(); + + @BeforeClass + public static void setUp() throws Exception { + UTIL.startMiniCluster(1); + } + + @AfterClass + public static void tearDown() throws IOException { + UTIL.shutdownMiniCluster(); + } + + @Test + public void testRestart() throws InterruptedException, IOException { + ServerName sn = UTIL.getMiniHBaseCluster().getRegionServer(0).getServerName(); + AssignmentManager am = UTIL.getMiniHBaseCluster().getMaster().getAssignmentManager(); + Set<RegionInfo> regions = new HashSet<>(am.getRegionsOnServer(sn)); + + UTIL.getMiniHBaseCluster().stopMaster(0).join(); + HMaster newMaster = UTIL.getMiniHBaseCluster().startMaster().getMaster(); + UTIL.waitFor(30000, () -> newMaster.isInitialized()); + + am = UTIL.getMiniHBaseCluster().getMaster().getAssignmentManager(); + List<RegionInfo> newRegions = am.getRegionsOnServer(sn); Review comment: How does the lock interfere here? ########## File path: hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/AssignmentManager.java ########## @@ -231,17 +231,15 @@ public void start() throws IOException, KeeperException { RegionState regionState = MetaTableLocator.getMetaRegionState(zkw); RegionStateNode regionNode = regionStates.getOrCreateRegionStateNode(RegionInfoBuilder.FIRST_META_REGIONINFO); - regionNode.lock(); Review comment: We need a note here? Normally, we want to lock RegionNode because we do not want concurrent modifications happening. I see this is happening early in startup so should be safe. I do notice that the RpcServer is up by the time we get to here but Master is not active yet so we can't get requests at this point? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
