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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.regionserver.wal;
19  
20  import static org.junit.Assert.assertTrue;
21  import static org.junit.Assert.fail;
22  
23  import org.apache.commons.logging.Log;
24  import org.apache.commons.logging.LogFactory;
25  import org.apache.commons.logging.impl.Log4JLogger;
26  import org.apache.hadoop.hbase.*;
27  import org.apache.hadoop.hbase.client.HBaseAdmin;
28  import org.apache.hadoop.hbase.client.HTable;
29  import org.apache.hadoop.hbase.client.Put;
30  import org.apache.hadoop.hbase.ipc.RpcClient;
31  import org.apache.hadoop.hbase.regionserver.HRegion;
32  import org.apache.hadoop.hbase.regionserver.HRegionServer;
33  import org.apache.hadoop.hbase.util.Bytes;
34  import org.apache.hadoop.hbase.util.FSUtils;
35  import org.apache.hadoop.hdfs.MiniDFSCluster;
36  import org.apache.hadoop.hdfs.server.datanode.DataNode;
37  import org.apache.hadoop.hdfs.server.namenode.LeaseManager;
38  import org.apache.log4j.Level;
39  import org.junit.After;
40  import org.junit.Before;
41  import org.junit.BeforeClass;
42  import org.junit.Test;
43  import org.junit.experimental.categories.Category;
44  
45  /**
46   * Tests for conditions that should trigger RegionServer aborts when
47   * rolling the current HLog fails.
48   */
49  @Category(MediumTests.class)
50  public class TestLogRollAbort {
51    private static final Log LOG = LogFactory.getLog(TestLogRolling.class);
52    private static MiniDFSCluster dfsCluster;
53    private static HBaseAdmin admin;
54    private static MiniHBaseCluster cluster;
55    private final static HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
56  
57    // verbose logging on classes that are touched in these tests
58    {
59      ((Log4JLogger)DataNode.LOG).getLogger().setLevel(Level.ALL);
60      ((Log4JLogger)LeaseManager.LOG).getLogger().setLevel(Level.ALL);
61      ((Log4JLogger)LogFactory.getLog("org.apache.hadoop.hdfs.server.namenode.FSNamesystem"))
62          .getLogger().setLevel(Level.ALL);
63      ((Log4JLogger)HRegionServer.LOG).getLogger().setLevel(Level.ALL);
64      ((Log4JLogger)HRegion.LOG).getLogger().setLevel(Level.ALL);
65      ((Log4JLogger)HLog.LOG).getLogger().setLevel(Level.ALL);
66    }
67  
68    // Need to override this setup so we can edit the config before it gets sent
69    // to the HDFS & HBase cluster startup.
70    @BeforeClass
71    public static void setUpBeforeClass() throws Exception {
72      // Tweak default timeout values down for faster recovery
73      TEST_UTIL.getConfiguration().setInt(
74          "hbase.regionserver.logroll.errors.tolerated", 2);
75      TEST_UTIL.getConfiguration().setInt(RpcClient.PING_INTERVAL_NAME, 10 * 1000);
76      TEST_UTIL.getConfiguration().setInt(RpcClient.SOCKET_TIMEOUT, 10 * 1000);
77      TEST_UTIL.getConfiguration().setInt("hbase.rpc.timeout", 10 * 1000);
78  
79      // Increase the amount of time between client retries
80      TEST_UTIL.getConfiguration().setLong("hbase.client.pause", 5 * 1000);
81  
82      // make sure log.hflush() calls syncFs() to open a pipeline
83      TEST_UTIL.getConfiguration().setBoolean("dfs.support.append", true);
84      // lower the namenode & datanode heartbeat so the namenode
85      // quickly detects datanode failures
86      TEST_UTIL.getConfiguration().setInt("heartbeat.recheck.interval", 5000);
87      TEST_UTIL.getConfiguration().setInt("dfs.heartbeat.interval", 1);
88      // the namenode might still try to choose the recently-dead datanode
89      // for a pipeline, so try to a new pipeline multiple times
90      TEST_UTIL.getConfiguration().setInt("dfs.client.block.write.retries", 10);
91    }
92  
93    @Before
94    public void setUp() throws Exception {
95      TEST_UTIL.startMiniCluster(2);
96  
97      cluster = TEST_UTIL.getHBaseCluster();
98      dfsCluster = TEST_UTIL.getDFSCluster();
99      admin = TEST_UTIL.getHBaseAdmin();
100 
101     // disable region rebalancing (interferes with log watching)
102     cluster.getMaster().balanceSwitch(false);
103   }
104 
105   @After
106   public void tearDown() throws Exception {
107     TEST_UTIL.shutdownMiniCluster();
108   }
109 
110   /**
111    * Tests that RegionServer aborts if we hit an error closing the WAL when
112    * there are unsynced WAL edits.  See HBASE-4282.
113    */
114   @Test
115   public void testRSAbortWithUnflushedEdits() throws Exception {
116     LOG.info("Starting testRSAbortWithUnflushedEdits()");
117 
118     // When the hbase:meta table can be opened, the region servers are running
119     new HTable(TEST_UTIL.getConfiguration(),
120       TableName.META_TABLE_NAME).close();
121 
122     // Create the test table and open it
123     String tableName = this.getClass().getSimpleName();
124     HTableDescriptor desc = new HTableDescriptor(tableName);
125     desc.addFamily(new HColumnDescriptor(HConstants.CATALOG_FAMILY));
126     desc.setDeferredLogFlush(true);
127 
128     admin.createTable(desc);
129     HTable table = new HTable(TEST_UTIL.getConfiguration(), tableName);
130 
131     HRegionServer server = TEST_UTIL.getRSForFirstRegionInTable(Bytes.toBytes(tableName));
132     HLog log = server.getWAL();
133 
134     assertTrue("Need HDFS-826 for this test", ((FSHLog) log).canGetCurReplicas());
135     // don't run this test without append support (HDFS-200 & HDFS-142)
136     assertTrue("Need append support for this test",
137         FSUtils.isAppendSupported(TEST_UTIL.getConfiguration()));
138 
139     Put p = new Put(Bytes.toBytes("row2001"));
140     p.add(HConstants.CATALOG_FAMILY, Bytes.toBytes("col"), Bytes.toBytes(2001));
141     table.put(p);
142 
143     log.sync();
144 
145     p = new Put(Bytes.toBytes("row2002"));
146     p.add(HConstants.CATALOG_FAMILY, Bytes.toBytes("col"), Bytes.toBytes(2002));
147     table.put(p);
148 
149     dfsCluster.restartDataNodes();
150     LOG.info("Restarted datanodes");
151 
152     try {
153       log.rollWriter(true);
154     } catch (FailedLogCloseException flce) {
155       assertTrue("Should have deferred flush log edits outstanding",
156           ((FSHLog) log).hasUnSyncedEntries());
157     }
158   }
159 
160 }
161