/** * 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 java.io.IOException; import java.io.UncheckedIOException; import java.util.concurrent.CountDownLatch; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.hbase.HBaseClassTestRule; import org.apache.hadoop.hbase.HBaseTestingUtility; import org.apache.hadoop.hbase.HConstants; import org.apache.hadoop.hbase.PleaseHoldException; import org.apache.hadoop.hbase.StartMiniClusterOption; import org.apache.hadoop.hbase.TableName; import org.apache.hadoop.hbase.client.Put; import org.apache.hadoop.hbase.client.RegionInfo; import org.apache.hadoop.hbase.client.Table; import org.apache.hadoop.hbase.master.assignment.AssignmentManager; import org.apache.hadoop.hbase.regionserver.HRegionServer; import org.apache.hadoop.hbase.testclassification.MasterTests; import org.apache.hadoop.hbase.testclassification.MediumTests; import org.apache.hadoop.hbase.util.Bytes; import org.junit.AfterClass; import org.junit.BeforeClass; import org.junit.ClassRule; import org.junit.Test; import org.junit.experimental.categories.Category; import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos.RegionStateTransition.TransitionCode; import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos.ReportRegionStateTransitionRequest; import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos.ReportRegionStateTransitionResponse; @Category({ MasterTests.class, MediumTests.class }) public class TestCloseAnOpeningRegion { @ClassRule public static final HBaseClassTestRule CLASS_RULE = HBaseClassTestRule.forClass(TestCloseAnOpeningRegion.class); private static final HBaseTestingUtility UTIL = new HBaseTestingUtility(); private static TableName TABLE_NAME = TableName.valueOf("race"); private static byte[] CF = Bytes.toBytes("cf"); private static volatile CountDownLatch ARRIVE; private static volatile CountDownLatch RESUME; public static final class MockHMaster extends HMaster { public MockHMaster(Configuration conf) throws IOException { super(conf); } @Override protected AssignmentManager createAssignmentManager(MasterServices master) { return new AssignmentManager(master) { @Override public ReportRegionStateTransitionResponse reportRegionStateTransition( ReportRegionStateTransitionRequest req) throws PleaseHoldException { ReportRegionStateTransitionResponse resp = super.reportRegionStateTransition(req); TransitionCode code = req.getTransition(0).getTransitionCode(); if (code == TransitionCode.OPENED && ARRIVE != null) { ARRIVE.countDown(); try { RESUME.await(); } catch (InterruptedException e) { throw new RuntimeException(e); } } return resp; } }; } } @BeforeClass public static void setUp() throws Exception { UTIL.getConfiguration().setInt(HConstants.HBASE_RPC_SHORTOPERATION_TIMEOUT_KEY, 60000); UTIL.startMiniCluster( StartMiniClusterOption.builder().numRegionServers(2).masterClass(MockHMaster.class).build()); UTIL.createTable(TABLE_NAME, CF); UTIL.getAdmin().balancerSwitch(false, true); } @AfterClass public static void tearDown() throws Exception { UTIL.shutdownMiniCluster(); } @Test public void test() throws IOException, InterruptedException { ARRIVE = new CountDownLatch(1); RESUME = new CountDownLatch(1); RegionInfo region = UTIL.getAdmin().getRegions(TABLE_NAME).get(0); HRegionServer src = UTIL.getRSForFirstRegionInTable(TABLE_NAME); HRegionServer dst = UTIL.getOtherRegionServer(src); Thread move0 = new Thread(() -> { try { UTIL.getAdmin().move(region.getEncodedNameAsBytes(), dst.getServerName()); } catch (IOException e) { throw new UncheckedIOException(e); } }); move0.start(); ARRIVE.await(); Thread move1 = new Thread(() -> { try { UTIL.getAdmin().move(region.getEncodedNameAsBytes(), src.getServerName()); } catch (IOException e) { throw new UncheckedIOException(e); } }); move1.start(); // No simple way to determine when it is safe to go on and produce the race so let's sleep for a // well... Thread.sleep(10000); RESUME.countDown(); move0.join(); move1.join(); try (Table table = UTIL.getConnection().getTable(TABLE_NAME)) { // make sure that we can write to the table, which means the region is online table.put(new Put(Bytes.toBytes(0)).addColumn(CF, Bytes.toBytes("cq"), Bytes.toBytes(0))); } } }