hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestAsyncTableScannerCloseWhileSuspending.java

   1 /**
   2  * Licensed to the Apache Software Foundation (ASF) under one
   3  * or more contributor license agreements.  See the NOTICE file
   4  * distributed with this work for additional information
   5  * regarding copyright ownership.  The ASF licenses this file
   6  * to you under the Apache License, Version 2.0 (the
   7  * "License"); you may not use this file except in compliance
   8  * with the License.  You may obtain a copy of the License at
   9  *
  10  *     http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  */
  18 package org.apache.hadoop.hbase.client;
  19
  20 import static org.junit.Assert.assertEquals;
  21
  22 import java.util.concurrent.ForkJoinPool;
  23 import java.util.stream.Collectors;
  24 import java.util.stream.IntStream;
  25 import org.apache.hadoop.hbase.HBaseClassTestRule;
  26 import org.apache.hadoop.hbase.HBaseTestingUtility;
  27 import org.apache.hadoop.hbase.TableName;
  28 import org.apache.hadoop.hbase.Waiter.ExplainingPredicate;
  29 import org.apache.hadoop.hbase.testclassification.ClientTests;
  30 import org.apache.hadoop.hbase.testclassification.MediumTests;
  31 import org.apache.hadoop.hbase.util.Bytes;
  32 import org.junit.AfterClass;
  33 import org.junit.BeforeClass;
  34 import org.junit.ClassRule;
  35 import org.junit.Test;
  36 import org.junit.experimental.categories.Category;
  37
  38 @Category({ MediumTests.class, ClientTests.class })
  39 public class TestAsyncTableScannerCloseWhileSuspending {
  40
  41   @ClassRule
  42   public static final HBaseClassTestRule CLASS_RULE =
  43       HBaseClassTestRule.forClass(TestAsyncTableScannerCloseWhileSuspending.class);
  44
  45   private static final HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
  46
  47   private static TableName TABLE_NAME = TableName.valueOf("async");
  48
  49   private static byte[] FAMILY = Bytes.toBytes("cf");
  50
  51   private static byte[] CQ = Bytes.toBytes("cq");
  52
  53   private static AsyncConnection CONN;
  54
  55   private static AsyncTable<?> TABLE;
  56
  57   @BeforeClass
  58   public static void setUp() throws Exception {
  59     TEST_UTIL.startMiniCluster(1);
  60     TEST_UTIL.createTable(TABLE_NAME, FAMILY);
  61     CONN = ConnectionFactory.createAsyncConnection(TEST_UTIL.getConfiguration()).get();
  62     TABLE = CONN.getTable(TABLE_NAME, ForkJoinPool.commonPool());
  63     TABLE.putAll(IntStream.range(0, 100).mapToObj(
  64       i -> new Put(Bytes.toBytes(String.format("%02d", i))).addColumn(FAMILY, CQ, Bytes.toBytes(i)))
  65         .collect(Collectors.toList())).get();
  66   }
  67
  68   @AfterClass
  69   public static void tearDown() throws Exception {
  70     CONN.close();
  71     TEST_UTIL.shutdownMiniCluster();
  72   }
  73
  74   private int getScannersCount() {
  75     return TEST_UTIL.getHBaseCluster().getRegionServerThreads().stream()
  76         .map(t -> t.getRegionServer()).mapToInt(rs -> rs.getRSRpcServices().getScannersCount())
  77         .sum();
  78   }
  79
  80   @Test
  81   public void testCloseScannerWhileSuspending() throws Exception {
  82     try (ResultScanner scanner = TABLE.getScanner(new Scan().setMaxResultSize(1))) {
  83       TEST_UTIL.waitFor(10000, 100, new ExplainingPredicate<Exception>() {
  84
  85         @Override
  86         public boolean evaluate() throws Exception {
  87           return ((AsyncTableResultScanner) scanner).isSuspended();
  88         }
  89
  90         @Override
  91         public String explainFailure() throws Exception {
  92           return "The given scanner has been suspended in time";
  93         }
  94       });
  95       assertEquals(1, getScannersCount());
  96     }
  97     TEST_UTIL.waitFor(10000, 100, new ExplainingPredicate<Exception>() {
  98
  99       @Override
 100       public boolean evaluate() throws Exception {
 101         return getScannersCount() == 0;
 102       }
 103
 104       @Override
 105       public String explainFailure() throws Exception {
 106         return "Still have " + getScannersCount() + " scanners opened";
 107       }
 108     });
 109   }
 110 }