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    *
    * 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
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  package org.apache.hadoop.hbase.regionserver;
  
  import java.io.IOException;
  
  import org.apache.hadoop.hbase.HBaseTestingUtility;
  import org.apache.hadoop.hbase.HConstants;
  import org.apache.hadoop.hbase.HTableDescriptor;
  import org.apache.hadoop.hbase.TableName;
  import org.apache.hadoop.hbase.client.Delete;
  import org.apache.hadoop.hbase.client.Get;
  import org.apache.hadoop.hbase.client.Increment;
  import org.apache.hadoop.hbase.client.Result;
  import org.apache.hadoop.hbase.client.Table;
  import org.apache.hadoop.hbase.coprocessor.BaseRegionObserver;
  import org.apache.hadoop.hbase.coprocessor.ObserverContext;
  import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;
  import org.apache.hadoop.hbase.testclassification.LargeTests;
  import org.apache.hadoop.hbase.util.Bytes;
  import org.apache.hadoop.hbase.util.Threads;
  import org.junit.AfterClass;
  import org.junit.Assert;
  import org.junit.BeforeClass;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  import org.junit.rules.TestName;
  
  @Category({LargeTests.class})
  public class TestSettingTimeoutOnBlockingPoint {
  
    private final static HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
    private static final byte[] FAM = Bytes.toBytes("f");
    private static final byte[] ROW1 = Bytes.toBytes("row1");
    private static final byte[] ROW2 = Bytes.toBytes("row2");
  
    @Rule
    public TestName testName = new TestName();
  
    @BeforeClass
    public static void setUpBeforeClass() throws Exception {
      TEST_UTIL.getConfiguration().setBoolean(HConstants.STATUS_PUBLISHED, true);
      TEST_UTIL.getConfiguration().setInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER, 1);
      // simulate queue blocking
      TEST_UTIL.getConfiguration().setInt(HConstants.REGION_SERVER_HANDLER_COUNT, 2);
      TEST_UTIL.startMiniCluster(2);
    }
  
    @AfterClass
    public static void setUpAfterClass() throws Exception {
      TEST_UTIL.shutdownMiniCluster();
    }
  
    public static class SleepCoprocessor extends BaseRegionObserver {
      public static final int SLEEP_TIME = 10000;
  
      @Override
      public Result preIncrementAfterRowLock(final ObserverContext<RegionCoprocessorEnvironment> e,
          final Increment increment) throws IOException {
        Threads.sleep(SLEEP_TIME);
        return super.preIncrementAfterRowLock(e, increment);
      }
    }
  
    @Test
    public void testRowLock() throws IOException {
      final TableName tableName = TableName.valueOf(testName.getMethodName());
      HTableDescriptor hdt = TEST_UTIL.createTableDescriptor(tableName.getNameAsString());
      hdt.addCoprocessor(SleepCoprocessor.class.getName());
      TEST_UTIL.createTable(hdt, new byte[][]{FAM}, TEST_UTIL.getConfiguration());
  
      Thread incrementThread = new Thread(new Runnable() {
        @Override
        public void run() {
          try {
            try(Table table = TEST_UTIL.getConnection().getTable(tableName)) {
              table.incrementColumnValue(ROW1, FAM, FAM, 1);
            }
          } catch (IOException e) {
            Assert.fail(e.getMessage());
          }
        }
     });
     Thread getThread = new Thread(new Runnable() {
       @Override
       public void run() {
         try {
           try(Table table = TEST_UTIL.getConnection().getTable(tableName)) {
             table.setRpcTimeout(1000);
             Delete delete = new Delete(ROW1);
             table.delete(delete);
           }
         } catch (IOException e) {
           Assert.fail(e.getMessage());
         }
       }
     });
 
     incrementThread.start();
     Threads.sleep(1000);
     getThread.start();
     Threads.sleep(2000);
     try (Table table = TEST_UTIL.getConnection().getTable(tableName)) {
       // We have only two handlers. The first thread will get a write lock for row1 and occupy
       // the first handler. The second thread need a read lock for row1, it should quit after 1000
       // ms and give back the handler because it can not get the lock in time.
       // So we can get the value using the second handler.
       table.setRpcTimeout(1000);
       table.get(new Get(ROW2)); // Will throw exception if the timeout checking is failed
     } finally {
       incrementThread.interrupt();
       getThread.interrupt();
     }
   }
 }