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1   /**
2    *
3    * Licensed to the Apache Software Foundation (ASF) under one
4    * or more contributor license agreements.  See the NOTICE file
5    * distributed with this work for additional information
6    * regarding copyright ownership.  The ASF licenses this file
7    * to you under the Apache License, Version 2.0 (the
8    * "License"); you may not use this file except in compliance
9    * with the License.  You may obtain a copy of the License at
10   *
11   *     http://www.apache.org/licenses/LICENSE-2.0
12   *
13   * Unless required by applicable law or agreed to in writing, software
14   * distributed under the License is distributed on an "AS IS" BASIS,
15   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16   * See the License for the specific language governing permissions and
17   * limitations under the License.
18   */
19  package org.apache.hadoop.hbase.regionserver;
20  
21  import static org.junit.Assert.assertEquals;
22  import static org.junit.Assert.assertTrue;
23  
24  import java.io.IOException;
25  import java.util.List;
26  
27  import org.apache.commons.logging.Log;
28  import org.apache.commons.logging.LogFactory;
29  import org.apache.hadoop.conf.Configuration;
30  import org.apache.hadoop.hbase.HBaseConfiguration;
31  import org.apache.hadoop.hbase.HBaseTestingUtility;
32  import org.apache.hadoop.hbase.HConstants;
33  import org.apache.hadoop.hbase.LargeTests;
34  import org.apache.hadoop.hbase.LocalHBaseCluster;
35  import org.apache.hadoop.hbase.MiniHBaseCluster;
36  import org.apache.hadoop.hbase.ServerName;
37  import org.apache.hadoop.hbase.master.HMaster;
38  import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.NameStringPair;
39  import org.apache.hadoop.hbase.protobuf.generated.RegionServerStatusProtos.RegionServerStartupResponse;
40  import org.apache.hadoop.hbase.util.JVMClusterUtil.MasterThread;
41  import org.apache.hadoop.hbase.util.Threads;
42  import org.junit.Test;
43  import org.junit.experimental.categories.Category;
44  
45  /**
46   * Tests region server termination during startup.
47   */
48  @Category(LargeTests.class)
49  public class TestRSKilledWhenInitializing {
50    private static final Log LOG = LogFactory.getLog(TestRSKilledWhenInitializing.class);
51  
52    private static boolean masterActive = false;
53  
54    /**
55     * Test verifies whether a region server is removing from online servers list in master if it went
56     * down after registering with master.
57     * @throws Exception
58     */
59    @Test(timeout = 180000)
60    public void testRSTermnationAfterRegisteringToMasterBeforeCreatingEphemeralNod() throws Exception {
61  
62      final int NUM_MASTERS = 1;
63      final int NUM_RS = 1;
64      // Create config to use for this cluster
65      Configuration conf = HBaseConfiguration.create();
66  
67      // Start the cluster
68      final HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility(conf);
69      TEST_UTIL.startMiniDFSCluster(3);
70      TEST_UTIL.startMiniZKCluster();
71      TEST_UTIL.createRootDir();
72      final LocalHBaseCluster cluster =
73          new LocalHBaseCluster(conf, NUM_MASTERS, NUM_RS, HMaster.class, MockedRegionServer.class);
74      final MasterThread master = cluster.getMasters().get(0);
75      master.start();
76      try {
77        long startTime = System.currentTimeMillis();
78        while (!master.getMaster().isActiveMaster()) {
79          try {
80            Thread.sleep(100);
81          } catch (InterruptedException ignored) {
82          }
83          if (System.currentTimeMillis() > startTime + 30000) {
84            throw new RuntimeException("Master not active after 30 seconds");
85          }
86        }
87        masterActive = true;
88        cluster.getRegionServers().get(0).start();
89        Thread.sleep(10000);
90        List<ServerName> onlineServersList =
91            master.getMaster().getServerManager().getOnlineServersList();
92        while (!onlineServersList.isEmpty()) {
93          Thread.sleep(100);
94          onlineServersList = master.getMaster().getServerManager().getOnlineServersList();
95        }
96        assertTrue(onlineServersList.isEmpty());
97        master.getMaster().stop("stopping master");
98        master.join();
99      } finally {
100       masterActive = false;
101       TEST_UTIL.shutdownMiniZKCluster();
102       TEST_UTIL.shutdownMiniDFSCluster();
103       TEST_UTIL.cleanupTestDir();
104     }
105   }
106 
107   public static class MockedRegionServer extends MiniHBaseCluster.MiniHBaseClusterRegionServer {
108 
109     public MockedRegionServer(Configuration conf) throws IOException, InterruptedException {
110       super(conf);
111     }
112 
113     @Override
114     protected void handleReportForDutyResponse(RegionServerStartupResponse c) throws IOException {
115       for (NameStringPair e : c.getMapEntriesList()) {
116         String key = e.getName();
117         // The hostname the master sees us as.
118         if (key.equals(HConstants.KEY_FOR_HOSTNAME_SEEN_BY_MASTER)) {
119           String hostnameFromMasterPOV = e.getValue();
120           assertEquals(super.getRpcServer().getListenerAddress().getHostName(),
121             hostnameFromMasterPOV);
122         }
123       }
124       while (!masterActive) {
125         Threads.sleep(100);
126       }
127       super.kill();
128     }
129   }
130 }