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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.testclassification.MediumTests;
34  import org.apache.hadoop.hbase.util.Bytes;
35  import org.apache.hadoop.hbase.util.FSUtils;
36  import org.apache.hadoop.hdfs.MiniDFSCluster;
37  import org.apache.hadoop.hdfs.server.datanode.DataNode;
38  import org.apache.hadoop.hdfs.server.namenode.LeaseManager;
39  import org.apache.log4j.Level;
40  import org.junit.After;
41  import org.junit.Before;
42  import org.junit.BeforeClass;
43  import org.junit.Test;
44  import org.junit.experimental.categories.Category;
45  
46  /**
47   * Tests for conditions that should trigger RegionServer aborts when
48   * rolling the current HLog fails.
49   */
50  @Category(MediumTests.class)
51  public class TestLogRollAbort {
52    private static final Log LOG = LogFactory.getLog(TestLogRolling.class);
53    private static MiniDFSCluster dfsCluster;
54    private static HBaseAdmin admin;
55    private static MiniHBaseCluster cluster;
56    private final static HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
57  
58    // verbose logging on classes that are touched in these tests
59    {
60      ((Log4JLogger)DataNode.LOG).getLogger().setLevel(Level.ALL);
61      ((Log4JLogger)LeaseManager.LOG).getLogger().setLevel(Level.ALL);
62      ((Log4JLogger)LogFactory.getLog("org.apache.hadoop.hdfs.server.namenode.FSNamesystem"))
63          .getLogger().setLevel(Level.ALL);
64      ((Log4JLogger)HRegionServer.LOG).getLogger().setLevel(Level.ALL);
65      ((Log4JLogger)HRegion.LOG).getLogger().setLevel(Level.ALL);
66      ((Log4JLogger)HLog.LOG).getLogger().setLevel(Level.ALL);
67    }
68  
69    // Need to override this setup so we can edit the config before it gets sent
70    // to the HDFS & HBase cluster startup.
71    @BeforeClass
72    public static void setUpBeforeClass() throws Exception {
73      // Tweak default timeout values down for faster recovery
74      TEST_UTIL.getConfiguration().setInt(
75          "hbase.regionserver.logroll.errors.tolerated", 2);
76      TEST_UTIL.getConfiguration().setInt(RpcClient.PING_INTERVAL_NAME, 10 * 1000);
77      TEST_UTIL.getConfiguration().setInt(RpcClient.SOCKET_TIMEOUT, 10 * 1000);
78      TEST_UTIL.getConfiguration().setInt("hbase.rpc.timeout", 10 * 1000);
79  
80      // Increase the amount of time between client retries
81      TEST_UTIL.getConfiguration().setLong("hbase.client.pause", 5 * 1000);
82  
83      // make sure log.hflush() calls syncFs() to open a pipeline
84      TEST_UTIL.getConfiguration().setBoolean("dfs.support.append", true);
85      // lower the namenode & datanode heartbeat so the namenode
86      // quickly detects datanode failures
87      TEST_UTIL.getConfiguration().setInt("heartbeat.recheck.interval", 5000);
88      TEST_UTIL.getConfiguration().setInt("dfs.heartbeat.interval", 1);
89      // the namenode might still try to choose the recently-dead datanode
90      // for a pipeline, so try to a new pipeline multiple times
91      TEST_UTIL.getConfiguration().setInt("dfs.client.block.write.retries", 10);
92    }
93  
94    @Before
95    public void setUp() throws Exception {
96      TEST_UTIL.startMiniCluster(2);
97  
98      cluster = TEST_UTIL.getHBaseCluster();
99      dfsCluster = TEST_UTIL.getDFSCluster();
100     admin = TEST_UTIL.getHBaseAdmin();
101 
102     // disable region rebalancing (interferes with log watching)
103     cluster.getMaster().balanceSwitch(false);
104   }
105 
106   @After
107   public void tearDown() throws Exception {
108     TEST_UTIL.shutdownMiniCluster();
109   }
110 
111   /**
112    * Tests that RegionServer aborts if we hit an error closing the WAL when
113    * there are unsynced WAL edits.  See HBASE-4282.
114    */
115   @Test
116   public void testRSAbortWithUnflushedEdits() throws Exception {
117     LOG.info("Starting testRSAbortWithUnflushedEdits()");
118 
119     // When the hbase:meta table can be opened, the region servers are running
120     new HTable(TEST_UTIL.getConfiguration(),
121       TableName.META_TABLE_NAME).close();
122 
123     // Create the test table and open it
124     String tableName = this.getClass().getSimpleName();
125     HTableDescriptor desc = new HTableDescriptor(tableName);
126     desc.addFamily(new HColumnDescriptor(HConstants.CATALOG_FAMILY));
127     desc.setDeferredLogFlush(true);
128 
129     admin.createTable(desc);
130     HTable table = new HTable(TEST_UTIL.getConfiguration(), tableName);
131 
132     HRegionServer server = TEST_UTIL.getRSForFirstRegionInTable(Bytes.toBytes(tableName));
133     HLog log = server.getWAL();
134 
135     assertTrue("Need HDFS-826 for this test", ((FSHLog) log).canGetCurReplicas());
136     // don't run this test without append support (HDFS-200 & HDFS-142)
137     assertTrue("Need append support for this test",
138         FSUtils.isAppendSupported(TEST_UTIL.getConfiguration()));
139 
140     Put p = new Put(Bytes.toBytes("row2001"));
141     p.add(HConstants.CATALOG_FAMILY, Bytes.toBytes("col"), Bytes.toBytes(2001));
142     table.put(p);
143 
144     log.sync();
145 
146     p = new Put(Bytes.toBytes("row2002"));
147     p.add(HConstants.CATALOG_FAMILY, Bytes.toBytes("col"), Bytes.toBytes(2002));
148     table.put(p);
149 
150     dfsCluster.restartDataNodes();
151     LOG.info("Restarted datanodes");
152 
153     try {
154       log.rollWriter(true);
155     } catch (FailedLogCloseException flce) {
156       assertTrue("Should have deferred flush log edits outstanding",
157           ((FSHLog) log).hasUnSyncedEntries());
158     }
159   }
160 
161 }
162