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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.regionserver;
19  
20  import static org.junit.Assert.*;
21  
22  import java.io.IOException;
23  import java.util.ArrayList;
24  import java.util.List;
25  
26  import org.apache.hadoop.hbase.HBaseTestingUtility;
27  import org.apache.hadoop.hbase.HColumnDescriptor;
28  import org.apache.hadoop.hbase.HRegionInfo;
29  import org.apache.hadoop.hbase.HTableDescriptor;
30  import org.apache.hadoop.hbase.MiniHBaseCluster;
31  import org.apache.hadoop.hbase.TableName;
32  import org.apache.hadoop.hbase.client.Admin;
33  import org.apache.hadoop.hbase.client.HTable;
34  import org.apache.hadoop.hbase.client.Put;
35  import org.apache.hadoop.hbase.client.Result;
36  import org.apache.hadoop.hbase.client.ResultScanner;
37  import org.apache.hadoop.hbase.client.Scan;
38  import org.apache.hadoop.hbase.client.Table;
39  import org.apache.hadoop.hbase.master.HMaster;
40  import org.apache.hadoop.hbase.util.Bytes;
41  import org.apache.hadoop.hbase.testclassification.MediumTests;
42  import org.junit.Test;
43  import org.junit.experimental.categories.Category;
44  import org.mortbay.log.Log;
45  
46  /**
47   * Tests that need to spin up a cluster testing an {@link HRegion}.  Use
48   * {@link TestHRegion} if you don't need a cluster, if you can test w/ a
49   * standalone {@link HRegion}.
50   */
51  @Category(MediumTests.class)
52  public class TestHRegionOnCluster {
53    private static final HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
54  
55    @Test (timeout=300000)
56    public void testDataCorrectnessReplayingRecoveredEdits() throws Exception {
57      final int NUM_MASTERS = 1;
58      final int NUM_RS = 3;
59      Admin hbaseAdmin = null;
60      TEST_UTIL.startMiniCluster(NUM_MASTERS, NUM_RS);
61  
62      try {
63        final TableName TABLENAME = TableName.valueOf("testDataCorrectnessReplayingRecoveredEdits");
64        final byte[] FAMILY = Bytes.toBytes("family");
65        MiniHBaseCluster cluster = TEST_UTIL.getHBaseCluster();
66        HMaster master = cluster.getMaster();
67  
68        // Create table
69        HTableDescriptor desc = new HTableDescriptor(TABLENAME);
70        desc.addFamily(new HColumnDescriptor(FAMILY));
71        hbaseAdmin = master.getConnection().getAdmin();
72        hbaseAdmin.createTable(desc);
73  
74        assertTrue(hbaseAdmin.isTableAvailable(TABLENAME));
75  
76        // Put data: r1->v1
77        Log.info("Loading r1 to v1 into " + TABLENAME);
78        HTable table = new HTable(TEST_UTIL.getConfiguration(), TABLENAME);
79        putDataAndVerify(table, "r1", FAMILY, "v1", 1);
80  
81        TEST_UTIL.waitUntilAllRegionsAssigned(table.getName());
82        // Move region to target server
83        HRegionInfo regionInfo = table.getRegionLocation("r1").getRegionInfo();
84        int originServerNum = cluster.getServerWith(regionInfo.getRegionName());
85        HRegionServer originServer = cluster.getRegionServer(originServerNum);
86        int targetServerNum = (originServerNum + 1) % NUM_RS;
87        HRegionServer targetServer = cluster.getRegionServer(targetServerNum);
88        assertFalse(originServer.equals(targetServer));
89  
90        TEST_UTIL.waitUntilAllRegionsAssigned(table.getName());
91        Log.info("Moving " + regionInfo.getEncodedName() + " to " + targetServer.getServerName());
92        hbaseAdmin.move(regionInfo.getEncodedNameAsBytes(),
93            Bytes.toBytes(targetServer.getServerName().getServerName()));
94        do {
95          Thread.sleep(1);
96        } while (cluster.getServerWith(regionInfo.getRegionName()) == originServerNum);
97  
98        // Put data: r2->v2
99        Log.info("Loading r2 to v2 into " + TABLENAME);
100       putDataAndVerify(table, "r2", FAMILY, "v2", 2);
101 
102       TEST_UTIL.waitUntilAllRegionsAssigned(table.getName());
103       // Move region to origin server
104       Log.info("Moving " + regionInfo.getEncodedName() + " to " + originServer.getServerName());
105       hbaseAdmin.move(regionInfo.getEncodedNameAsBytes(),
106           Bytes.toBytes(originServer.getServerName().getServerName()));
107       do {
108         Thread.sleep(1);
109       } while (cluster.getServerWith(regionInfo.getRegionName()) == targetServerNum);
110 
111       // Put data: r3->v3
112       Log.info("Loading r3 to v3 into " + TABLENAME);
113       putDataAndVerify(table, "r3", FAMILY, "v3", 3);
114 
115       // Kill target server
116       Log.info("Killing target server " + targetServer.getServerName());
117       targetServer.kill();
118       cluster.getRegionServerThreads().get(targetServerNum).join();
119       // Wait until finish processing of shutdown
120       while (master.getServerManager().areDeadServersInProgress()) {
121         Thread.sleep(5);
122       }
123       // Kill origin server
124       Log.info("Killing origin server " + targetServer.getServerName());
125       originServer.kill();
126       cluster.getRegionServerThreads().get(originServerNum).join();
127 
128       // Put data: r4->v4
129       Log.info("Loading r4 to v4 into " + TABLENAME);
130       putDataAndVerify(table, "r4", FAMILY, "v4", 4);
131 
132     } finally {
133       if (hbaseAdmin != null) hbaseAdmin.close();
134       TEST_UTIL.shutdownMiniCluster();
135     }
136   }
137 
138   private void putDataAndVerify(Table table, String row, byte[] family,
139       String value, int verifyNum) throws IOException {
140     System.out.println("=========Putting data :" + row);
141     Put put = new Put(Bytes.toBytes(row));
142     put.add(family, Bytes.toBytes("q1"), Bytes.toBytes(value));
143     table.put(put);
144     ResultScanner resultScanner = table.getScanner(new Scan());
145     List<Result> results = new ArrayList<Result>();
146     while (true) {
147       Result r = resultScanner.next();
148       if (r == null)
149         break;
150       results.add(r);
151     }
152     resultScanner.close();
153     if (results.size() != verifyNum) {
154       System.out.println(results);
155     }
156     assertEquals(verifyNum, results.size());
157   }
158 
159 }