View Javadoc

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;
19  
20  import org.apache.hadoop.hbase.HBaseTestingUtility;
21  import org.apache.hadoop.hbase.ServerName;
22  import org.apache.hadoop.hbase.master.procedure.ServerCrashProcedure;
23  import org.apache.hadoop.hbase.procedure2.ProcedureExecutor;
24  import org.apache.hadoop.hbase.procedure2.ProcedureTestingUtility;
25  import org.apache.hadoop.hbase.testclassification.MediumTests;
26  import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
27  import org.apache.hadoop.hbase.util.ManualEnvironmentEdge;
28  import org.apache.hadoop.hbase.util.Pair;
29  import org.junit.AfterClass;
30  import org.junit.Assert;
31  import org.junit.BeforeClass;
32  import org.junit.Test;
33  import org.junit.experimental.categories.Category;
34  
35  import java.util.List;
36  import java.util.Set;
37  
38  import static org.junit.Assert.assertFalse;
39  import static org.junit.Assert.assertTrue;
40  
41  @Category({MediumTests.class})
42  public class TestDeadServer {
43    private static final HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
44  
45    final ServerName hostname123 = ServerName.valueOf("127.0.0.1", 123, 3L);
46    final ServerName hostname123_2 = ServerName.valueOf("127.0.0.1", 123, 4L);
47    final ServerName hostname1234 = ServerName.valueOf("127.0.0.2", 1234, 4L);
48    final ServerName hostname12345 = ServerName.valueOf("127.0.0.2", 12345, 4L);
49  
50    @BeforeClass
51    public static void setupBeforeClass() throws Exception {
52      TEST_UTIL.startMiniCluster();
53    }
54  
55    @AfterClass
56    public static void tearDownAfterClass() throws Exception {
57      TEST_UTIL.shutdownMiniCluster();
58    }
59  
60    @Test public void testIsDead() {
61      DeadServer ds = new DeadServer();
62      ds.add(hostname123);
63      ds.notifyServer(hostname123);
64      assertTrue(ds.areDeadServersInProgress());
65      ds.finish(hostname123);
66      assertFalse(ds.areDeadServersInProgress());
67  
68      ds.add(hostname1234);
69      ds.notifyServer(hostname1234);
70      assertTrue(ds.areDeadServersInProgress());
71      ds.finish(hostname1234);
72      assertFalse(ds.areDeadServersInProgress());
73  
74      ds.add(hostname12345);
75      ds.notifyServer(hostname12345);
76      assertTrue(ds.areDeadServersInProgress());
77      ds.finish(hostname12345);
78      assertFalse(ds.areDeadServersInProgress());
79  
80      // Already dead =       127.0.0.1,9090,112321
81      // Coming back alive =  127.0.0.1,9090,223341
82  
83      final ServerName deadServer = ServerName.valueOf("127.0.0.1", 9090, 112321L);
84      assertFalse(ds.cleanPreviousInstance(deadServer));
85      ds.add(deadServer);
86      assertTrue(ds.isDeadServer(deadServer));
87      Set<ServerName> deadServerNames = ds.copyServerNames();
88      for (ServerName eachDeadServer : deadServerNames) {
89        Assert.assertNotNull(ds.getTimeOfDeath(eachDeadServer));
90      }
91      final ServerName deadServerHostComingAlive =
92          ServerName.valueOf("127.0.0.1", 9090, 223341L);
93      assertTrue(ds.cleanPreviousInstance(deadServerHostComingAlive));
94      assertFalse(ds.isDeadServer(deadServer));
95      assertFalse(ds.cleanPreviousInstance(deadServerHostComingAlive));
96    }
97  
98    @Test(timeout = 15000)
99    public void testCrashProcedureReplay() {
100     HMaster master = TEST_UTIL.getHBaseCluster().getMaster();
101     ProcedureExecutor pExecutor = master.getMasterProcedureExecutor();
102     ServerCrashProcedure proc = new ServerCrashProcedure(hostname123, false, false);
103 
104     ProcedureTestingUtility.submitAndWait(pExecutor, proc);
105 
106     assertFalse(master.getServerManager().getDeadServers().areDeadServersInProgress());
107   }
108 
109   @Test
110   public void testSortExtract(){
111     ManualEnvironmentEdge mee = new ManualEnvironmentEdge();
112     EnvironmentEdgeManager.injectEdge(mee);
113     mee.setValue(1);
114 
115     DeadServer d = new DeadServer();
116 
117 
118     d.add(hostname123);
119     mee.incValue(1);
120     d.add(hostname1234);
121     mee.incValue(1);
122     d.add(hostname12345);
123 
124     List<Pair<ServerName, Long>> copy = d.copyDeadServersSince(2L);
125     Assert.assertEquals(2, copy.size());
126 
127     Assert.assertEquals(hostname1234, copy.get(0).getFirst());
128     Assert.assertEquals(new Long(2L), copy.get(0).getSecond());
129 
130     Assert.assertEquals(hostname12345, copy.get(1).getFirst());
131     Assert.assertEquals(new Long(3L), copy.get(1).getSecond());
132 
133     EnvironmentEdgeManager.reset();
134   }
135 
136   @Test
137   public void testClean(){
138     DeadServer d = new DeadServer();
139     d.add(hostname123);
140 
141     d.cleanPreviousInstance(hostname12345);
142     Assert.assertFalse(d.isEmpty());
143 
144     d.cleanPreviousInstance(hostname1234);
145     Assert.assertFalse(d.isEmpty());
146 
147     d.cleanPreviousInstance(hostname123_2);
148     Assert.assertTrue(d.isEmpty());
149   }
150 
151 }
152