001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.master;
019
020import static org.junit.Assert.assertFalse;
021import static org.junit.Assert.assertNotEquals;
022import static org.junit.Assert.assertTrue;
023
024import java.util.List;
025import java.util.Set;
026import org.apache.hadoop.hbase.HBaseClassTestRule;
027import org.apache.hadoop.hbase.HBaseTestingUtil;
028import org.apache.hadoop.hbase.ServerName;
029import org.apache.hadoop.hbase.master.procedure.MasterProcedureEnv;
030import org.apache.hadoop.hbase.master.procedure.ServerCrashProcedure;
031import org.apache.hadoop.hbase.procedure2.ProcedureExecutor;
032import org.apache.hadoop.hbase.procedure2.ProcedureTestingUtility;
033import org.apache.hadoop.hbase.testclassification.MasterTests;
034import org.apache.hadoop.hbase.testclassification.MediumTests;
035import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
036import org.apache.hadoop.hbase.util.ManualEnvironmentEdge;
037import org.apache.hadoop.hbase.util.Pair;
038import org.junit.AfterClass;
039import org.junit.Assert;
040import org.junit.BeforeClass;
041import org.junit.ClassRule;
042import org.junit.Test;
043import org.junit.experimental.categories.Category;
044
045@Category({ MasterTests.class, MediumTests.class })
046public class TestDeadServer {
047
048  @ClassRule
049  public static final HBaseClassTestRule CLASS_RULE =
050    HBaseClassTestRule.forClass(TestDeadServer.class);
051
052  private static final HBaseTestingUtil TEST_UTIL = new HBaseTestingUtil();
053
054  final ServerName hostname123 = ServerName.valueOf("127.0.0.1", 123, 3L);
055  final ServerName hostname123_2 = ServerName.valueOf("127.0.0.1", 123, 4L);
056  final ServerName hostname1234 = ServerName.valueOf("127.0.0.2", 1234, 4L);
057  final ServerName hostname12345 = ServerName.valueOf("127.0.0.2", 12345, 4L);
058
059  @BeforeClass
060  public static void setupBeforeClass() throws Exception {
061    TEST_UTIL.startMiniCluster();
062  }
063
064  @AfterClass
065  public static void tearDownAfterClass() throws Exception {
066    TEST_UTIL.shutdownMiniCluster();
067  }
068
069  @Test
070  public void testIsDead() {
071    DeadServer ds = new DeadServer();
072    ds.putIfAbsent(hostname123);
073
074    ds.putIfAbsent(hostname1234);
075
076    ds.putIfAbsent(hostname12345);
077
078    // Already dead = 127.0.0.1,9090,112321
079    // Coming back alive = 127.0.0.1,9090,223341
080
081    final ServerName deadServer = ServerName.valueOf("127.0.0.1", 9090, 112321L);
082    assertFalse(ds.cleanPreviousInstance(deadServer));
083    ds.putIfAbsent(deadServer);
084    assertTrue(ds.isDeadServer(deadServer));
085    Set<ServerName> deadServerNames = ds.copyServerNames();
086    for (ServerName eachDeadServer : deadServerNames) {
087      assertNotEquals(0, ds.getDeathTimestamp(eachDeadServer));
088    }
089    final ServerName deadServerHostComingAlive = ServerName.valueOf("127.0.0.1", 9090, 223341L);
090    assertTrue(ds.cleanPreviousInstance(deadServerHostComingAlive));
091    assertFalse(ds.isDeadServer(deadServer));
092    assertFalse(ds.cleanPreviousInstance(deadServerHostComingAlive));
093  }
094
095  @Test
096  public void testCrashProcedureReplay() throws Exception {
097    HMaster master = TEST_UTIL.getHBaseCluster().getMaster();
098    final ProcedureExecutor<MasterProcedureEnv> pExecutor = master.getMasterProcedureExecutor();
099    ServerCrashProcedure proc =
100      new ServerCrashProcedure(pExecutor.getEnvironment(), hostname123, false, false);
101
102    pExecutor.stop();
103    ProcedureTestingUtility.submitAndWait(pExecutor, proc);
104    assertTrue(master.getServerManager().areDeadServersInProgress());
105
106    ProcedureTestingUtility.restart(pExecutor);
107    ProcedureTestingUtility.waitProcedure(pExecutor, proc);
108    assertFalse(master.getServerManager().areDeadServersInProgress());
109  }
110
111  @Test
112  public void testSortExtract() {
113    ManualEnvironmentEdge mee = new ManualEnvironmentEdge();
114    EnvironmentEdgeManager.injectEdge(mee);
115    mee.setValue(1);
116
117    DeadServer d = new DeadServer();
118
119    d.putIfAbsent(hostname123);
120    mee.incValue(1);
121    d.putIfAbsent(hostname1234);
122    mee.incValue(1);
123    d.putIfAbsent(hostname12345);
124
125    List<Pair<ServerName, Long>> copy = d.copyDeadServersSince(2L);
126    Assert.assertEquals(2, copy.size());
127
128    Assert.assertEquals(hostname1234, copy.get(0).getFirst());
129    Assert.assertEquals(Long.valueOf(2L), copy.get(0).getSecond());
130
131    Assert.assertEquals(hostname12345, copy.get(1).getFirst());
132    Assert.assertEquals(Long.valueOf(3L), copy.get(1).getSecond());
133
134    EnvironmentEdgeManager.reset();
135  }
136
137  @Test
138  public void testClean() {
139    DeadServer d = new DeadServer();
140    d.putIfAbsent(hostname123);
141
142    d.cleanPreviousInstance(hostname12345);
143    Assert.assertFalse(d.isEmpty());
144
145    d.cleanPreviousInstance(hostname1234);
146    Assert.assertFalse(d.isEmpty());
147
148    d.cleanPreviousInstance(hostname123_2);
149    Assert.assertTrue(d.isEmpty());
150  }
151
152  @Test
153  public void testClearDeadServer() {
154    DeadServer d = new DeadServer();
155    d.putIfAbsent(hostname123);
156    d.putIfAbsent(hostname1234);
157    Assert.assertEquals(2, d.size());
158
159    d.removeDeadServer(hostname123);
160    Assert.assertEquals(1, d.size());
161    d.removeDeadServer(hostname1234);
162    Assert.assertTrue(d.isEmpty());
163
164    d.putIfAbsent(hostname1234);
165    Assert.assertFalse(d.removeDeadServer(hostname123_2));
166    Assert.assertEquals(1, d.size());
167    Assert.assertTrue(d.removeDeadServer(hostname1234));
168    Assert.assertTrue(d.isEmpty());
169  }
170}