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.replication.regionserver;
019
020import static org.junit.Assert.assertArrayEquals;
021import static org.junit.Assert.assertEquals;
022
023import java.io.IOException;
024import java.io.UncheckedIOException;
025import java.util.UUID;
026import org.apache.hadoop.fs.FileSystem;
027import org.apache.hadoop.fs.Path;
028import org.apache.hadoop.hbase.Cell;
029import org.apache.hadoop.hbase.CellUtil;
030import org.apache.hadoop.hbase.HBaseClassTestRule;
031import org.apache.hadoop.hbase.HBaseTestingUtil;
032import org.apache.hadoop.hbase.HConstants;
033import org.apache.hadoop.hbase.TableName;
034import org.apache.hadoop.hbase.Waiter.ExplainingPredicate;
035import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder;
036import org.apache.hadoop.hbase.client.Put;
037import org.apache.hadoop.hbase.client.Table;
038import org.apache.hadoop.hbase.client.TableDescriptorBuilder;
039import org.apache.hadoop.hbase.replication.BaseReplicationEndpoint;
040import org.apache.hadoop.hbase.replication.ReplicationPeerConfig;
041import org.apache.hadoop.hbase.testclassification.MediumTests;
042import org.apache.hadoop.hbase.testclassification.ReplicationTests;
043import org.apache.hadoop.hbase.util.Bytes;
044import org.apache.hadoop.hbase.util.JVMClusterUtil.RegionServerThread;
045import org.apache.hadoop.hbase.wal.WAL;
046import org.apache.hadoop.hbase.wal.WAL.Entry;
047import org.apache.hadoop.hbase.wal.WALFactory;
048import org.apache.hadoop.hbase.wal.WALProvider;
049import org.junit.AfterClass;
050import org.junit.BeforeClass;
051import org.junit.ClassRule;
052import org.junit.Test;
053import org.junit.experimental.categories.Category;
054
055/**
056 * Testcase for HBASE-20624.
057 */
058@Category({ ReplicationTests.class, MediumTests.class })
059public class TestRaceWhenCreatingReplicationSource {
060
061  @ClassRule
062  public static final HBaseClassTestRule CLASS_RULE =
063    HBaseClassTestRule.forClass(TestRaceWhenCreatingReplicationSource.class);
064
065  private static final HBaseTestingUtil UTIL = new HBaseTestingUtil();
066
067  private static String PEER_ID = "1";
068
069  private static TableName TABLE_NAME = TableName.valueOf("race");
070
071  private static byte[] CF = Bytes.toBytes("CF");
072
073  private static byte[] CQ = Bytes.toBytes("CQ");
074
075  private static FileSystem FS;
076
077  private static Path LOG_PATH;
078
079  private static WALProvider.Writer WRITER;
080
081  private static volatile boolean NULL_UUID = true;
082
083  public static final class LocalReplicationEndpoint extends BaseReplicationEndpoint {
084
085    private static final UUID PEER_UUID = UTIL.getRandomUUID();
086
087    @Override
088    public UUID getPeerUUID() {
089      if (NULL_UUID) {
090        return null;
091      } else {
092        return PEER_UUID;
093      }
094    }
095
096    @Override
097    public boolean replicate(ReplicateContext replicateContext) {
098      synchronized (WRITER) {
099        try {
100          for (Entry entry : replicateContext.getEntries()) {
101            WRITER.append(entry);
102          }
103          WRITER.sync(false);
104        } catch (IOException e) {
105          throw new UncheckedIOException(e);
106        }
107      }
108      return true;
109    }
110
111    @Override
112    public void start() {
113      startAsync();
114    }
115
116    @Override
117    public void stop() {
118      stopAsync();
119    }
120
121    @Override
122    protected void doStart() {
123      notifyStarted();
124    }
125
126    @Override
127    protected void doStop() {
128      notifyStopped();
129    }
130
131    @Override
132    public boolean canReplicateToSameCluster() {
133      return true;
134    }
135  }
136
137  @BeforeClass
138  public static void setUpBeforeClass() throws Exception {
139    UTIL.getConfiguration().set(WALFactory.WAL_PROVIDER, "multiwal");
140    // make sure that we will create a new group for the table
141    UTIL.getConfiguration().setInt("hbase.wal.regiongrouping.numgroups", 8);
142    UTIL.startMiniCluster(3);
143    Path dir = UTIL.getDataTestDirOnTestFS();
144    FS = UTIL.getTestFileSystem();
145    LOG_PATH = new Path(dir, "replicated");
146    WRITER = WALFactory.createWALWriter(FS, LOG_PATH, UTIL.getConfiguration());
147    UTIL.getAdmin().addReplicationPeer(PEER_ID,
148      ReplicationPeerConfig.newBuilder().setClusterKey("127.0.0.1:2181:/hbase")
149        .setReplicationEndpointImpl(LocalReplicationEndpoint.class.getName()).build(),
150      true);
151  }
152
153  @AfterClass
154  public static void tearDownAfterClass() throws Exception {
155    UTIL.shutdownMiniCluster();
156  }
157
158  @Test
159  public void testRace() throws Exception {
160    UTIL.waitFor(30000, new ExplainingPredicate<Exception>() {
161
162      @Override
163      public boolean evaluate() throws Exception {
164        for (RegionServerThread t : UTIL.getMiniHBaseCluster().getRegionServerThreads()) {
165          ReplicationSource source =
166            (ReplicationSource) ((Replication) t.getRegionServer().getReplicationSourceService())
167              .getReplicationManager().getSource(PEER_ID);
168          if (source == null || source.getReplicationEndpoint() == null) {
169            return false;
170          }
171        }
172        return true;
173      }
174
175      @Override
176      public String explainFailure() throws Exception {
177        return "Replication source has not been initialized yet";
178      }
179    });
180    UTIL.getAdmin().createTable(
181      TableDescriptorBuilder.newBuilder(TABLE_NAME).setColumnFamily(ColumnFamilyDescriptorBuilder
182        .newBuilder(CF).setScope(HConstants.REPLICATION_SCOPE_GLOBAL).build()).build());
183    UTIL.waitTableAvailable(TABLE_NAME);
184    try (Table table = UTIL.getConnection().getTable(TABLE_NAME)) {
185      table.put(new Put(Bytes.toBytes(1)).addColumn(CF, CQ, Bytes.toBytes(1)));
186    }
187    NULL_UUID = false;
188    UTIL.waitFor(30000, new ExplainingPredicate<Exception>() {
189
190      @Override
191      public boolean evaluate() throws Exception {
192        try (WAL.Reader reader = WALFactory.createReader(FS, LOG_PATH, UTIL.getConfiguration())) {
193          return reader.next() != null;
194        } catch (IOException e) {
195          return false;
196        }
197      }
198
199      @Override
200      public String explainFailure() throws Exception {
201        return "Replication has not catched up";
202      }
203    });
204    try (WAL.Reader reader = WALFactory.createReader(FS, LOG_PATH, UTIL.getConfiguration())) {
205      Cell cell = reader.next().getEdit().getCells().get(0);
206      assertEquals(1, Bytes.toInt(cell.getRowArray(), cell.getRowOffset(), cell.getRowLength()));
207      assertArrayEquals(CF, CellUtil.cloneFamily(cell));
208      assertArrayEquals(CQ, CellUtil.cloneQualifier(cell));
209      assertEquals(1,
210        Bytes.toInt(cell.getValueArray(), cell.getValueOffset(), cell.getValueLength()));
211    }
212  }
213}