hbase-server/src/test/java/org/apache/hadoop/hbase/TestSequenceIdMonotonicallyIncreasing.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;
  19
  20 import static org.junit.Assert.assertEquals;
  21
  22 import java.io.IOException;
  23 import java.util.List;
  24 import java.util.concurrent.ExecutionException;
  25 import java.util.concurrent.TimeUnit;
  26 import java.util.concurrent.TimeoutException;
  27 import org.apache.hadoop.fs.Path;
  28 import org.apache.hadoop.hbase.client.Admin;
  29 import org.apache.hadoop.hbase.client.Put;
  30 import org.apache.hadoop.hbase.client.RegionInfo;
  31 import org.apache.hadoop.hbase.client.RegionLocator;
  32 import org.apache.hadoop.hbase.client.Table;
  33 import org.apache.hadoop.hbase.regionserver.HRegion;
  34 import org.apache.hadoop.hbase.regionserver.HRegionServer;
  35 import org.apache.hadoop.hbase.regionserver.wal.AbstractFSWAL;
  36 import org.apache.hadoop.hbase.testclassification.LargeTests;
  37 import org.apache.hadoop.hbase.testclassification.RegionServerTests;
  38 import org.apache.hadoop.hbase.util.Bytes;
  39 import org.apache.hadoop.hbase.wal.WAL;
  40 import org.apache.hadoop.hbase.wal.WALFactory;
  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 /**
  49  * Testcase for HBASE-20066
  50  */
  51 @Category({ RegionServerTests.class, LargeTests.class })
  52 public class TestSequenceIdMonotonicallyIncreasing {
  53
  54   @ClassRule
  55   public static final HBaseClassTestRule CLASS_RULE =
  56     HBaseClassTestRule.forClass(TestSequenceIdMonotonicallyIncreasing.class);
  57
  58   private static final HBaseTestingUtility UTIL = new HBaseTestingUtility();
  59
  60   private static final TableName NAME = TableName.valueOf("test");
  61
  62   private static final byte[] CF = Bytes.toBytes("cf");
  63
  64   private static final byte[] CQ = Bytes.toBytes("cq");
  65
  66   @BeforeClass
  67   public static void setUpBeforeClass() throws Exception {
  68     UTIL.startMiniCluster(2);
  69   }
  70
  71   @AfterClass
  72   public static void tearDownAfterClass() throws Exception {
  73     UTIL.shutdownMiniCluster();
  74   }
  75
  76   @After
  77   public void tearDown() throws IOException {
  78     Admin admin = UTIL.getAdmin();
  79     if (admin.tableExists(NAME)) {
  80       admin.disableTable(NAME);
  81       admin.deleteTable(NAME);
  82     }
  83   }
  84
  85   private Table createTable(boolean multiRegions) throws IOException {
  86     if (multiRegions) {
  87       return UTIL.createTable(NAME, CF, new byte[][] { Bytes.toBytes(1) });
  88     } else {
  89       return UTIL.createTable(NAME, CF);
  90     }
  91   }
  92
  93   private long getMaxSeqId(HRegionServer rs, RegionInfo region) throws IOException {
  94     Path walFile = ((AbstractFSWAL<?>) rs.getWAL(null)).getCurrentFileName();
  95     long maxSeqId = -1L;
  96     try (WAL.Reader reader =
  97       WALFactory.createReader(UTIL.getTestFileSystem(), walFile, UTIL.getConfiguration())) {
  98       for (;;) {
  99         WAL.Entry entry = reader.next();
 100         if (entry == null) {
 101           break;
 102         }
 103         if (Bytes.equals(region.getEncodedNameAsBytes(), entry.getKey().getEncodedRegionName())) {
 104           maxSeqId = Math.max(maxSeqId, entry.getKey().getSequenceId());
 105         }
 106       }
 107     }
 108     return maxSeqId;
 109   }
 110
 111   @Test
 112   public void testSplit()
 113       throws IOException, InterruptedException, ExecutionException, TimeoutException {
 114     try (Table table = createTable(false)) {
 115       table.put(new Put(Bytes.toBytes(0)).addColumn(CF, CQ, Bytes.toBytes(0)));
 116       table.put(new Put(Bytes.toBytes(1)).addColumn(CF, CQ, Bytes.toBytes(0)));
 117     }
 118     UTIL.flush(NAME);
 119     HRegionServer rs = UTIL.getRSForFirstRegionInTable(NAME);
 120     RegionInfo region = UTIL.getMiniHBaseCluster().getRegions(NAME).get(0).getRegionInfo();
 121     UTIL.getAdmin().splitRegionAsync(region.getRegionName(), Bytes.toBytes(1)).get(1,
 122       TimeUnit.MINUTES);
 123     long maxSeqId = getMaxSeqId(rs, region);
 124     RegionLocator locator = UTIL.getConnection().getRegionLocator(NAME);
 125     HRegionLocation locA = locator.getRegionLocation(Bytes.toBytes(0), true);
 126     HRegionLocation locB = locator.getRegionLocation(Bytes.toBytes(1), true);
 127     assertEquals(maxSeqId + 1, locA.getSeqNum());
 128     assertEquals(maxSeqId + 1, locB.getSeqNum());
 129   }
 130
 131   @Test
 132   public void testMerge()
 133       throws IOException, InterruptedException, ExecutionException, TimeoutException {
 134     try (Table table = createTable(true)) {
 135       table.put(new Put(Bytes.toBytes(0)).addColumn(CF, CQ, Bytes.toBytes(0)));
 136       table.put(new Put(Bytes.toBytes(1)).addColumn(CF, CQ, Bytes.toBytes(0)));
 137       table.put(new Put(Bytes.toBytes(2)).addColumn(CF, CQ, Bytes.toBytes(0)));
 138     }
 139     UTIL.flush(NAME);
 140     MiniHBaseCluster cluster = UTIL.getMiniHBaseCluster();
 141     List<HRegion> regions = cluster.getRegions(NAME);
 142     HRegion regionA = regions.get(0);
 143     HRegion regionB = regions.get(1);
 144     HRegionServer rsA =
 145       cluster.getRegionServer(cluster.getServerWith(regionA.getRegionInfo().getRegionName()));
 146     HRegionServer rsB =
 147       cluster.getRegionServer(cluster.getServerWith(regionB.getRegionInfo().getRegionName()));
 148     UTIL.getAdmin().mergeRegionsAsync(regionA.getRegionInfo().getRegionName(),
 149       regionB.getRegionInfo().getRegionName(), false).get(1, TimeUnit.MINUTES);
 150     long maxSeqIdA = getMaxSeqId(rsA, regionA.getRegionInfo());
 151     long maxSeqIdB = getMaxSeqId(rsB, regionB.getRegionInfo());
 152     HRegionLocation loc =
 153       UTIL.getConnection().getRegionLocator(NAME).getRegionLocation(Bytes.toBytes(0), true);
 154     assertEquals(Math.max(maxSeqIdA, maxSeqIdB) + 1, loc.getSeqNum());
 155   }
 156 }