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.wal;
019
020import static org.junit.Assert.assertEquals;
021
022import java.util.Arrays;
023import java.util.concurrent.CountDownLatch;
024import org.apache.hadoop.hbase.HBaseTestingUtility;
025import org.apache.hadoop.hbase.TableName;
026import org.apache.hadoop.hbase.client.Durability;
027import org.apache.hadoop.hbase.client.Get;
028import org.apache.hadoop.hbase.client.Put;
029import org.apache.hadoop.hbase.client.Result;
030import org.apache.hadoop.hbase.client.Table;
031import org.apache.hadoop.hbase.util.Bytes;
032import org.junit.Test;
033import org.slf4j.Logger;
034import org.slf4j.LoggerFactory;
035
036/**
037 * Testcase for HBASE-22539
038 */
039public abstract class WALCorruptionDueToDanglingByteBufferTestBase {
040
041  private static final Logger LOG =
042    LoggerFactory.getLogger(TestAsyncFSWALCorruptionDueToDanglingByteBuffer.class);
043
044  protected static final HBaseTestingUtility UTIL = new HBaseTestingUtility();
045
046  protected static CountDownLatch ARRIVE;
047
048  protected static CountDownLatch RESUME;
049
050  protected static TableName TABLE_NAME = TableName.valueOf("Corruption");
051
052  protected static byte[] CF = Bytes.toBytes("cf");
053
054  protected static byte[] CQ = Bytes.toBytes("cq");
055
056  private byte[] getBytes(String prefix, int index) {
057    return Bytes.toBytes(String.format("%s-%08d", prefix, index));
058  }
059
060  @Test
061  public void test() throws Exception {
062    LOG.info("Stop WAL appending...");
063    ARRIVE = new CountDownLatch(1);
064    RESUME = new CountDownLatch(1);
065    try (Table table = UTIL.getConnection().getTable(TABLE_NAME)) {
066      LOG.info("Put 100 rows with " + Durability.ASYNC_WAL + "...");
067      for (int i = 0; i < 100; i++) {
068        table.batch(Arrays.asList(new Put(getBytes("row", i))
069          .addColumn(CF, CQ, getBytes("value", i)).setDurability(Durability.ASYNC_WAL)),
070          new Object[1]);
071      }
072      ARRIVE.await();
073      ARRIVE = null;
074      LOG.info("Resume WAL appending...");
075      RESUME.countDown();
076      LOG.info("Put a single row to force a WAL sync...");
077      table.put(new Put(Bytes.toBytes("row")).addColumn(CF, CQ, Bytes.toBytes("value")));
078      LOG.info("Abort the only region server");
079      UTIL.getMiniHBaseCluster().abortRegionServer(0);
080      LOG.info("Start a new region server");
081      UTIL.getMiniHBaseCluster().startRegionServerAndWait(30000);
082      UTIL.waitTableAvailable(TABLE_NAME);
083      LOG.info("Check if all rows are still valid");
084      for (int i = 0; i < 100; i++) {
085        Result result = table.get(new Get(getBytes("row", i)));
086        assertEquals(Bytes.toString(getBytes("value", i)), Bytes.toString(result.getValue(CF, CQ)));
087      }
088      Result result = table.get(new Get(Bytes.toBytes("row")));
089      assertEquals("value", Bytes.toString(result.getValue(CF, CQ)));
090    }
091  }
092}