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.jupiter.api.Assertions.assertEquals;
021import static org.junit.jupiter.api.Assertions.assertFalse;
022import static org.junit.jupiter.api.Assertions.assertNotEquals;
023import static org.junit.jupiter.api.Assertions.assertTrue;
024
025import java.util.List;
026import java.util.Set;
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.jupiter.api.AfterAll;
039import org.junit.jupiter.api.BeforeAll;
040import org.junit.jupiter.api.Tag;
041import org.junit.jupiter.api.Test;
042
043@Tag(MasterTests.TAG)
044@Tag(MediumTests.TAG)
045public class TestDeadServer {
046
047  private static final HBaseTestingUtil TEST_UTIL = new HBaseTestingUtil();
048
049  final ServerName hostname123 = ServerName.valueOf("127.0.0.1", 123, 3L);
050  final ServerName hostname123_2 = ServerName.valueOf("127.0.0.1", 123, 4L);
051  final ServerName hostname1234 = ServerName.valueOf("127.0.0.2", 1234, 4L);
052  final ServerName hostname12345 = ServerName.valueOf("127.0.0.2", 12345, 4L);
053
054  @BeforeAll
055  public static void setupBeforeClass() throws Exception {
056    TEST_UTIL.startMiniCluster();
057  }
058
059  @AfterAll
060  public static void tearDownAfterClass() throws Exception {
061    TEST_UTIL.shutdownMiniCluster();
062  }
063
064  @Test
065  public void testIsDead() {
066    DeadServer ds = new DeadServer();
067    ds.putIfAbsent(hostname123);
068
069    ds.putIfAbsent(hostname1234);
070
071    ds.putIfAbsent(hostname12345);
072
073    // Already dead = 127.0.0.1,9090,112321
074    // Coming back alive = 127.0.0.1,9090,223341
075
076    final ServerName deadServer = ServerName.valueOf("127.0.0.1", 9090, 112321L);
077    assertFalse(ds.cleanPreviousInstance(deadServer));
078    ds.putIfAbsent(deadServer);
079    assertTrue(ds.isDeadServer(deadServer));
080    Set<ServerName> deadServerNames = ds.copyServerNames();
081    for (ServerName eachDeadServer : deadServerNames) {
082      assertNotEquals(0, ds.getDeathTimestamp(eachDeadServer));
083    }
084    final ServerName deadServerHostComingAlive = ServerName.valueOf("127.0.0.1", 9090, 223341L);
085    assertTrue(ds.cleanPreviousInstance(deadServerHostComingAlive));
086    assertFalse(ds.isDeadServer(deadServer));
087    assertFalse(ds.cleanPreviousInstance(deadServerHostComingAlive));
088  }
089
090  @Test
091  public void testCrashProcedureReplay() throws Exception {
092    HMaster master = TEST_UTIL.getHBaseCluster().getMaster();
093    final ProcedureExecutor<MasterProcedureEnv> pExecutor = master.getMasterProcedureExecutor();
094    ServerCrashProcedure proc =
095      new ServerCrashProcedure(pExecutor.getEnvironment(), hostname123, false, false);
096
097    pExecutor.stop();
098    ProcedureTestingUtility.submitAndWait(pExecutor, proc);
099    assertTrue(master.getServerManager().areDeadServersInProgress());
100
101    ProcedureTestingUtility.restart(pExecutor);
102    ProcedureTestingUtility.waitProcedure(pExecutor, proc);
103    assertFalse(master.getServerManager().areDeadServersInProgress());
104  }
105
106  @Test
107  public void testSortExtract() {
108    ManualEnvironmentEdge mee = new ManualEnvironmentEdge();
109    EnvironmentEdgeManager.injectEdge(mee);
110    mee.setValue(1);
111
112    DeadServer d = new DeadServer();
113
114    d.putIfAbsent(hostname123);
115    mee.incValue(1);
116    d.putIfAbsent(hostname1234);
117    mee.incValue(1);
118    d.putIfAbsent(hostname12345);
119
120    List<Pair<ServerName, Long>> copy = d.copyDeadServersSince(2L);
121    assertEquals(2, copy.size());
122
123    assertEquals(hostname1234, copy.get(0).getFirst());
124    assertEquals(Long.valueOf(2L), copy.get(0).getSecond());
125
126    assertEquals(hostname12345, copy.get(1).getFirst());
127    assertEquals(Long.valueOf(3L), copy.get(1).getSecond());
128
129    EnvironmentEdgeManager.reset();
130  }
131
132  @Test
133  public void testClean() {
134    DeadServer d = new DeadServer();
135    d.putIfAbsent(hostname123);
136
137    d.cleanPreviousInstance(hostname12345);
138    assertFalse(d.isEmpty());
139
140    d.cleanPreviousInstance(hostname1234);
141    assertFalse(d.isEmpty());
142
143    d.cleanPreviousInstance(hostname123_2);
144    assertTrue(d.isEmpty());
145  }
146
147  @Test
148  public void testClearDeadServer() {
149    DeadServer d = new DeadServer();
150    d.putIfAbsent(hostname123);
151    d.putIfAbsent(hostname1234);
152    assertEquals(2, d.size());
153
154    d.removeDeadServer(hostname123);
155    assertEquals(1, d.size());
156    d.removeDeadServer(hostname1234);
157    assertTrue(d.isEmpty());
158
159    d.putIfAbsent(hostname1234);
160    assertFalse(d.removeDeadServer(hostname123_2));
161    assertEquals(1, d.size());
162    assertTrue(d.removeDeadServer(hostname1234));
163    assertTrue(d.isEmpty());
164  }
165}