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;
019
020import java.io.IOException;
021import java.util.Optional;
022import org.apache.hadoop.hbase.HBaseClassTestRule;
023import org.apache.hadoop.hbase.HBaseTestingUtil;
024import org.apache.hadoop.hbase.HConstants;
025import org.apache.hadoop.hbase.TableName;
026import org.apache.hadoop.hbase.client.RegionInfo;
027import org.apache.hadoop.hbase.coprocessor.CoprocessorHost;
028import org.apache.hadoop.hbase.coprocessor.ObserverContext;
029import org.apache.hadoop.hbase.coprocessor.RegionCoprocessor;
030import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;
031import org.apache.hadoop.hbase.coprocessor.RegionObserver;
032import org.apache.hadoop.hbase.testclassification.LargeTests;
033import org.apache.hadoop.hbase.testclassification.MasterTests;
034import org.junit.BeforeClass;
035import org.junit.ClassRule;
036import org.junit.Test;
037import org.junit.experimental.categories.Category;
038import org.slf4j.Logger;
039import org.slf4j.LoggerFactory;
040
041@Category({ MasterTests.class, LargeTests.class })
042public class TestMasterHandlerFullWhenTransitRegion {
043
044  private static Logger LOG =
045    LoggerFactory.getLogger(TestMasterHandlerFullWhenTransitRegion.class.getName());
046
047  @ClassRule
048  public static final HBaseClassTestRule CLASS_RULE =
049    HBaseClassTestRule.forClass(TestMasterHandlerFullWhenTransitRegion.class);
050
051  private static final HBaseTestingUtil UTIL = new HBaseTestingUtil();
052
053  private static final String TABLENAME = "table";
054
055  @BeforeClass
056  public static void setUp() throws Exception {
057    UTIL.getConfiguration().setStrings(CoprocessorHost.REGION_COPROCESSOR_CONF_KEY,
058      DelayOpenCP.class.getName());
059    // set handler number to 1.
060    UTIL.getConfiguration().setInt(HConstants.REGION_SERVER_HANDLER_COUNT, 1);
061    UTIL.startMiniCluster(2);
062    UTIL.createTable(TableName.valueOf(TABLENAME), "fa");
063  }
064
065  @Test
066  public void test() throws Exception {
067    RegionInfo regionInfo = UTIL.getAdmin().getRegions(TableName.valueOf(TABLENAME)).get(0);
068    // See HBASE-21754
069    // There is Only one handler, if ReportRegionStateTransitionRequest executes in the same kind
070    // of thread with moveRegion, it will lock each other. Making the move operation can not finish.
071    UTIL.getAdmin().move(regionInfo.getEncodedNameAsBytes());
072    LOG.info("Region move complete");
073  }
074
075  /**
076   * Make open region very slow
077   */
078  public static class DelayOpenCP implements RegionCoprocessor, RegionObserver {
079
080    @Override
081    public void preOpen(ObserverContext<? extends RegionCoprocessorEnvironment> c)
082      throws IOException {
083      try {
084        if (!c.getEnvironment().getRegion().getRegionInfo().getTable().isSystemTable()) {
085          LOG.info("begin to sleep");
086          Thread.sleep(10000);
087          LOG.info("finish sleep");
088        }
089      } catch (Throwable t) {
090
091      }
092    }
093
094    @Override
095    public Optional<RegionObserver> getRegionObserver() {
096      return Optional.of(this);
097    }
098  }
099
100}