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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.regionserver.HRegion;
31  import org.apache.hadoop.hbase.regionserver.HRegionServer;
32  import org.apache.hadoop.hbase.util.Bytes;
33  import org.apache.hadoop.hbase.util.FSUtils;
34  import org.apache.hadoop.hdfs.MiniDFSCluster;
35  import org.apache.hadoop.hdfs.server.datanode.DataNode;
36  import org.apache.hadoop.hdfs.server.namenode.LeaseManager;
37  import org.apache.log4j.Level;
38  import org.junit.After;
39  import org.junit.Before;
40  import org.junit.BeforeClass;
41  import org.junit.Test;
42  import org.junit.experimental.categories.Category;
43  
44  /**
45   * Tests for conditions that should trigger RegionServer aborts when
46   * rolling the current HLog fails.
47   */
48  @Category(MediumTests.class)
49  public class TestLogRollAbort {
50    private static final Log LOG = LogFactory.getLog(TestLogRolling.class);
51    private static MiniDFSCluster dfsCluster;
52    private static HBaseAdmin admin;
53    private static MiniHBaseCluster cluster;
54    private final static HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
55  
56    // verbose logging on classes that are touched in these tests
57    {
58      ((Log4JLogger)DataNode.LOG).getLogger().setLevel(Level.ALL);
59      ((Log4JLogger)LeaseManager.LOG).getLogger().setLevel(Level.ALL);
60      ((Log4JLogger)LogFactory.getLog("org.apache.hadoop.hdfs.server.namenode.FSNamesystem"))
61          .getLogger().setLevel(Level.ALL);
62      ((Log4JLogger)HRegionServer.LOG).getLogger().setLevel(Level.ALL);
63      ((Log4JLogger)HRegion.LOG).getLogger().setLevel(Level.ALL);
64      ((Log4JLogger)HLog.LOG).getLogger().setLevel(Level.ALL);
65    }
66  
67    // Need to override this setup so we can edit the config before it gets sent
68    // to the HDFS & HBase cluster startup.
69    @BeforeClass
70    public static void setUpBeforeClass() throws Exception {
71      // Tweak default timeout values down for faster recovery
72      TEST_UTIL.getConfiguration().setInt(
73          "hbase.regionserver.logroll.errors.tolerated", 2);
74      TEST_UTIL.getConfiguration().setInt("ipc.ping.interval", 10 * 1000);
75      TEST_UTIL.getConfiguration().setInt("ipc.socket.timeout", 10 * 1000);
76      TEST_UTIL.getConfiguration().setInt("hbase.rpc.timeout", 10 * 1000);
77  
78      // Increase the amount of time between client retries
79      TEST_UTIL.getConfiguration().setLong("hbase.client.pause", 5 * 1000);
80  
81      // make sure log.hflush() calls syncFs() to open a pipeline
82      TEST_UTIL.getConfiguration().setBoolean("dfs.support.append", true);
83      // lower the namenode & datanode heartbeat so the namenode
84      // quickly detects datanode failures
85      TEST_UTIL.getConfiguration().setInt("heartbeat.recheck.interval", 5000);
86      TEST_UTIL.getConfiguration().setInt("dfs.heartbeat.interval", 1);
87      // the namenode might still try to choose the recently-dead datanode
88      // for a pipeline, so try to a new pipeline multiple times
89      TEST_UTIL.getConfiguration().setInt("dfs.client.block.write.retries", 10);
90      // set periodic sync to 2 min so it doesn't run during test
91      TEST_UTIL.getConfiguration().setInt("hbase.regionserver.optionallogflushinterval",
92          120 * 1000);
93    }
94  
95    @Before
96    public void setUp() throws Exception {
97      TEST_UTIL.startMiniCluster(2);
98  
99      cluster = TEST_UTIL.getHBaseCluster();
100     dfsCluster = TEST_UTIL.getDFSCluster();
101     admin = TEST_UTIL.getHBaseAdmin();
102 
103     // disable region rebalancing (interferes with log watching)
104     cluster.getMaster().balanceSwitch(false);
105   }
106 
107   @After
108   public void tearDown() throws Exception {
109     TEST_UTIL.shutdownMiniCluster();
110   }
111 
112   /**
113    * Tests that RegionServer aborts if we hit an error closing the WAL when
114    * there are unsynced WAL edits.  See HBASE-4282.
115    */
116   @Test
117   public void testRSAbortWithUnflushedEdits() throws Exception {
118     LOG.info("Starting testRSAbortWithUnflushedEdits()");
119 
120     // When the hbase:meta table can be opened, the region servers are running
121     new HTable(TEST_UTIL.getConfiguration(),
122       TableName.META_TABLE_NAME).close();
123 
124     // Create the test table and open it
125     String tableName = this.getClass().getSimpleName();
126     HTableDescriptor desc = new HTableDescriptor(tableName);
127     desc.addFamily(new HColumnDescriptor(HConstants.CATALOG_FAMILY));
128     desc.setDeferredLogFlush(true);
129 
130     admin.createTable(desc);
131     HTable table = new HTable(TEST_UTIL.getConfiguration(), tableName);
132 
133     HRegionServer server = TEST_UTIL.getRSForFirstRegionInTable(Bytes.toBytes(tableName));
134     HLog log = server.getWAL();
135 
136     assertTrue("Need HDFS-826 for this test", ((FSHLog) log).canGetCurReplicas());
137     // don't run this test without append support (HDFS-200 & HDFS-142)
138     assertTrue("Need append support for this test",
139         FSUtils.isAppendSupported(TEST_UTIL.getConfiguration()));
140 
141     Put p = new Put(Bytes.toBytes("row2001"));
142     p.add(HConstants.CATALOG_FAMILY, Bytes.toBytes("col"), Bytes.toBytes(2001));
143     table.put(p);
144 
145     log.sync();
146 
147     p = new Put(Bytes.toBytes("row2002"));
148     p.add(HConstants.CATALOG_FAMILY, Bytes.toBytes("col"), Bytes.toBytes(2002));
149     table.put(p);
150 
151     dfsCluster.restartDataNodes();
152     LOG.info("Restarted datanodes");
153 
154     assertTrue("Should have an outstanding WAL edit", ((FSHLog) log).hasDeferredEntries());
155     try {
156       log.rollWriter(true);
157       fail("Log roll should have triggered FailedLogCloseException");
158     } catch (FailedLogCloseException flce) {
159       assertTrue("Should have deferred flush log edits outstanding",
160           ((FSHLog) log).hasDeferredEntries());
161     }
162   }
163 
164 }
165