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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.master.cleaner;
19  
20  import static org.junit.Assert.assertEquals;
21  
22  import java.io.IOException;
23  import java.net.URLEncoder;
24  
25  import org.apache.hadoop.conf.Configuration;
26  import org.apache.hadoop.fs.FileStatus;
27  import org.apache.hadoop.fs.FileSystem;
28  import org.apache.hadoop.fs.Path;
29  import org.apache.hadoop.hbase.*;
30  import org.apache.hadoop.hbase.catalog.CatalogTracker;
31  import org.apache.hadoop.hbase.replication.ReplicationFactory;
32  import org.apache.hadoop.hbase.replication.ReplicationQueues;
33  import org.apache.hadoop.hbase.replication.regionserver.Replication;
34  import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
35  import org.junit.AfterClass;
36  import org.junit.BeforeClass;
37  import org.junit.Test;
38  import org.junit.experimental.categories.Category;
39  
40  @Category(MediumTests.class)
41  public class TestLogsCleaner {
42  
43    private final static HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
44  
45    /**
46     * @throws java.lang.Exception
47     */
48    @BeforeClass
49    public static void setUpBeforeClass() throws Exception {
50      TEST_UTIL.startMiniZKCluster();
51    }
52  
53    /**
54     * @throws java.lang.Exception
55     */
56    @AfterClass
57    public static void tearDownAfterClass() throws Exception {
58      TEST_UTIL.shutdownMiniZKCluster();
59    }
60  
61    @Test
62    public void testLogCleaning() throws Exception{
63      Configuration conf = TEST_UTIL.getConfiguration();
64      // set TTL
65      long ttl = 10000;
66      conf.setLong("hbase.master.logcleaner.ttl", ttl);
67      conf.setBoolean(HConstants.REPLICATION_ENABLE_KEY, HConstants.REPLICATION_ENABLE_DEFAULT);
68      Replication.decorateMasterConfiguration(conf);
69      Server server = new DummyServer();
70      ReplicationQueues repQueues =
71          ReplicationFactory.getReplicationQueues(server.getZooKeeper(), conf, server);
72      repQueues.init(server.getServerName().toString());
73      final Path oldLogDir = new Path(TEST_UTIL.getDataTestDir(),
74          HConstants.HREGION_OLDLOGDIR_NAME);
75      String fakeMachineName =
76        URLEncoder.encode(server.getServerName().toString(), "UTF8");
77  
78      final FileSystem fs = FileSystem.get(conf);
79  
80      // Create 2 invalid files, 1 "recent" file, 1 very new file and 30 old files
81      long now = System.currentTimeMillis();
82      fs.delete(oldLogDir, true);
83      fs.mkdirs(oldLogDir);
84      // Case 1: 2 invalid files, which would be deleted directly
85      fs.createNewFile(new Path(oldLogDir, "a"));
86      fs.createNewFile(new Path(oldLogDir, fakeMachineName + "." + "a"));
87      // Case 2: 1 "recent" file, not even deletable for the first log cleaner
88      // (TimeToLiveLogCleaner), so we are not going down the chain
89      System.out.println("Now is: " + now);
90      for (int i = 1; i < 31; i++) {
91        // Case 3: old files which would be deletable for the first log cleaner
92        // (TimeToLiveLogCleaner), and also for the second (ReplicationLogCleaner)
93        Path fileName = new Path(oldLogDir, fakeMachineName + "." + (now - i) );
94        fs.createNewFile(fileName);
95        // Case 4: put 3 old log files in ZK indicating that they are scheduled
96        // for replication so these files would pass the first log cleaner
97        // (TimeToLiveLogCleaner) but would be rejected by the second
98        // (ReplicationLogCleaner)
99        if (i % (30/3) == 1) {
100         repQueues.addLog(fakeMachineName, fileName.getName());
101         System.out.println("Replication log file: " + fileName);
102       }
103     }
104 
105     // sleep for sometime to get newer modifcation time
106     Thread.sleep(ttl);
107     fs.createNewFile(new Path(oldLogDir, fakeMachineName + "." + now));
108 
109     // Case 2: 1 newer file, not even deletable for the first log cleaner
110     // (TimeToLiveLogCleaner), so we are not going down the chain
111     fs.createNewFile(new Path(oldLogDir, fakeMachineName + "." + (now + 10000) ));
112 
113     for (FileStatus stat : fs.listStatus(oldLogDir)) {
114       System.out.println(stat.getPath().toString());
115     }
116 
117     assertEquals(34, fs.listStatus(oldLogDir).length);
118 
119     LogCleaner cleaner  = new LogCleaner(1000, server, conf, fs, oldLogDir);
120     cleaner.chore();
121 
122     // We end up with the current log file, a newer one and the 3 old log
123     // files which are scheduled for replication
124     TEST_UTIL.waitFor(1000, new Waiter.Predicate<Exception>() {
125       @Override
126       public boolean evaluate() throws Exception {
127         return 5 == fs.listStatus(oldLogDir).length;
128       }
129     });
130 
131     for (FileStatus file : fs.listStatus(oldLogDir)) {
132       System.out.println("Kept log files: " + file.getPath().getName());
133     }
134   }
135 
136   static class DummyServer implements Server {
137 
138     @Override
139     public Configuration getConfiguration() {
140       return TEST_UTIL.getConfiguration();
141     }
142 
143     @Override
144     public ZooKeeperWatcher getZooKeeper() {
145       try {
146         return new ZooKeeperWatcher(getConfiguration(), "dummy server", this);
147       } catch (IOException e) {
148         e.printStackTrace();
149       }
150       return null;
151     }
152 
153     @Override
154     public CatalogTracker getCatalogTracker() {
155       return null;
156     }
157 
158     @Override
159     public ServerName getServerName() {
160       return ServerName.valueOf("regionserver,60020,000000");
161     }
162 
163     @Override
164     public void abort(String why, Throwable e) {}
165 
166     @Override
167     public boolean isAborted() {
168       return false;
169     }
170 
171     @Override
172     public void stop(String why) {}
173 
174     @Override
175     public boolean isStopped() {
176       return false;
177     }
178   }
179 
180 }
181