hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestAsyncTableUseMetaReplicas.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.assertArrayEquals;
  21
  22 import java.io.IOException;
  23 import java.util.Optional;
  24 import java.util.concurrent.ExecutionException;
  25 import java.util.concurrent.TimeUnit;
  26 import org.apache.hadoop.conf.Configuration;
  27 import org.apache.hadoop.hbase.HBaseClassTestRule;
  28 import org.apache.hadoop.hbase.HBaseTestingUtil;
  29 import org.apache.hadoop.hbase.HConstants;
  30 import org.apache.hadoop.hbase.TableName;
  31 import org.apache.hadoop.hbase.coprocessor.CoprocessorHost;
  32 import org.apache.hadoop.hbase.coprocessor.ObserverContext;
  33 import org.apache.hadoop.hbase.coprocessor.RegionCoprocessor;
  34 import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;
  35 import org.apache.hadoop.hbase.coprocessor.RegionObserver;
  36 import org.apache.hadoop.hbase.regionserver.StorefileRefresherChore;
  37 import org.apache.hadoop.hbase.testclassification.ClientTests;
  38 import org.apache.hadoop.hbase.testclassification.MediumTests;
  39 import org.apache.hadoop.hbase.util.Bytes;
  40 import org.apache.hadoop.hbase.util.FutureUtils;
  41 import org.junit.After;
  42 import org.junit.AfterClass;
  43 import org.junit.BeforeClass;
  44 import org.junit.ClassRule;
  45 import org.junit.Test;
  46 import org.junit.experimental.categories.Category;
  47
  48 @Category({ ClientTests.class, MediumTests.class })
  49 public class TestAsyncTableUseMetaReplicas {
  50
  51   @ClassRule
  52   public static final HBaseClassTestRule CLASS_RULE =
  53     HBaseClassTestRule.forClass(TestAsyncTableUseMetaReplicas.class);
  54
  55   private static final HBaseTestingUtil UTIL = new HBaseTestingUtil();
  56
  57   private static TableName TABLE_NAME = TableName.valueOf("Replica");
  58
  59   private static byte[] FAMILY = Bytes.toBytes("Family");
  60
  61   private static byte[] QUALIFIER = Bytes.toBytes("Qual");
  62
  63   private static byte[] ROW = Bytes.toBytes("Row");
  64
  65   private static byte[] VALUE = Bytes.toBytes("Value");
  66
  67   private static volatile boolean FAIL_PRIMARY_SCAN = false;
  68
  69   public static final class FailPrimaryMetaScanCp implements RegionObserver, RegionCoprocessor {
  70
  71     @Override
  72     public Optional<RegionObserver> getRegionObserver() {
  73       return Optional.of(this);
  74     }
  75
  76     @Override
  77     public void preScannerOpen(ObserverContext<RegionCoprocessorEnvironment> c, Scan scan)
  78         throws IOException {
  79       RegionInfo region = c.getEnvironment().getRegionInfo();
  80       if (FAIL_PRIMARY_SCAN && TableName.isMetaTableName(region.getTable()) &&
  81         region.getReplicaId() == RegionReplicaUtil.DEFAULT_REPLICA_ID) {
  82         throw new IOException("Inject error");
  83       }
  84     }
  85   }
  86
  87   @BeforeClass
  88   public static void setUp() throws Exception {
  89     Configuration conf = UTIL.getConfiguration();
  90     conf.setInt(StorefileRefresherChore.REGIONSERVER_STOREFILE_REFRESH_PERIOD, 1000);
  91     conf.setStrings(CoprocessorHost.REGION_COPROCESSOR_CONF_KEY,
  92       FailPrimaryMetaScanCp.class.getName());
  93     UTIL.startMiniCluster(3);
  94     HBaseTestingUtil.setReplicas(UTIL.getAdmin(), TableName.META_TABLE_NAME, 3);
  95     try (ConnectionRegistry registry = ConnectionRegistryFactory.getRegistry(conf)) {
  96       RegionReplicaTestHelper.waitUntilAllMetaReplicasAreReady(UTIL, registry);
  97     }
  98     try (Table table = UTIL.createTable(TABLE_NAME, FAMILY)) {
  99       table.put(new Put(ROW).addColumn(FAMILY, QUALIFIER, VALUE));
 100     }
 101     UTIL.flush(TableName.META_TABLE_NAME);
 102     // wait for the store file refresh so we can read the region location from secondary meta
 103     // replicas
 104     Thread.sleep(2000);
 105   }
 106
 107   @AfterClass
 108   public static void tearDown() throws Exception {
 109     UTIL.shutdownMiniCluster();
 110   }
 111
 112   @After
 113   public void tearDownAfterTest() {
 114     // make sure we do not mess up cleanup code.
 115     FAIL_PRIMARY_SCAN = false;
 116   }
 117
 118   private void testRead(boolean useMetaReplicas)
 119       throws IOException, InterruptedException, ExecutionException {
 120     FAIL_PRIMARY_SCAN = true;
 121     Configuration conf = new Configuration(UTIL.getConfiguration());
 122     conf.setBoolean(HConstants.USE_META_REPLICAS, useMetaReplicas);
 123     conf.setLong(HConstants.HBASE_CLIENT_META_REPLICA_SCAN_TIMEOUT, TimeUnit.SECONDS.toMicros(1));
 124     try (AsyncConnection conn = ConnectionFactory.createAsyncConnection(conf).get()) {
 125       Result result = FutureUtils.get(conn.getTableBuilder(TABLE_NAME)
 126         .setOperationTimeout(3, TimeUnit.SECONDS).build().get(new Get(ROW)));
 127       assertArrayEquals(VALUE, result.getValue(FAMILY, QUALIFIER));
 128     }
 129   }
 130
 131   @Test(expected = RetriesExhaustedException.class)
 132   public void testNotUseMetaReplicas()
 133       throws IOException, InterruptedException, ExecutionException {
 134     testRead(false);
 135   }
 136
 137   @Test
 138   public void testUseMetaReplicas() throws IOException, InterruptedException, ExecutionException {
 139     testRead(true);
 140   }
 141 }