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.regionserver;
019
020import static org.junit.Assert.assertEquals;
021import static org.junit.Assert.assertFalse;
022import static org.junit.Assert.assertTrue;
023
024import java.io.IOException;
025import java.util.ArrayList;
026import java.util.List;
027import org.apache.hadoop.hbase.HBaseClassTestRule;
028import org.apache.hadoop.hbase.HBaseTestingUtility;
029import org.apache.hadoop.hbase.HColumnDescriptor;
030import org.apache.hadoop.hbase.HRegionInfo;
031import org.apache.hadoop.hbase.HTableDescriptor;
032import org.apache.hadoop.hbase.MiniHBaseCluster;
033import org.apache.hadoop.hbase.TableName;
034import org.apache.hadoop.hbase.client.Admin;
035import org.apache.hadoop.hbase.client.Put;
036import org.apache.hadoop.hbase.client.RegionLocator;
037import org.apache.hadoop.hbase.client.Result;
038import org.apache.hadoop.hbase.client.ResultScanner;
039import org.apache.hadoop.hbase.client.Scan;
040import org.apache.hadoop.hbase.client.Table;
041import org.apache.hadoop.hbase.master.HMaster;
042import org.apache.hadoop.hbase.testclassification.MediumTests;
043import org.apache.hadoop.hbase.testclassification.RegionServerTests;
044import org.apache.hadoop.hbase.util.Bytes;
045import org.junit.ClassRule;
046import org.junit.Rule;
047import org.junit.Test;
048import org.junit.experimental.categories.Category;
049import org.junit.rules.TestName;
050import org.slf4j.Logger;
051import org.slf4j.LoggerFactory;
052
053/**
054 * Tests that need to spin up a cluster testing an {@link HRegion}.  Use
055 * {@link TestHRegion} if you don't need a cluster, if you can test w/ a
056 * standalone {@link HRegion}.
057 */
058@Category({RegionServerTests.class, MediumTests.class})
059public class TestHRegionOnCluster {
060
061  @ClassRule
062  public static final HBaseClassTestRule CLASS_RULE =
063      HBaseClassTestRule.forClass(TestHRegionOnCluster.class);
064
065  private static final Logger LOG = LoggerFactory.getLogger(TestHRegionOnCluster.class);
066  private static final HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
067
068  @Rule
069  public TestName name = new TestName();
070
071  @Test
072  public void testDataCorrectnessReplayingRecoveredEdits() throws Exception {
073    final int NUM_MASTERS = 1;
074    final int NUM_RS = 3;
075    Admin hbaseAdmin = null;
076    TEST_UTIL.startMiniCluster(NUM_MASTERS, NUM_RS);
077
078    try {
079      final TableName tableName = TableName.valueOf(name.getMethodName());
080      final byte[] FAMILY = Bytes.toBytes("family");
081      MiniHBaseCluster cluster = TEST_UTIL.getHBaseCluster();
082      HMaster master = cluster.getMaster();
083
084      // Create table
085      HTableDescriptor desc = new HTableDescriptor(tableName);
086      desc.addFamily(new HColumnDescriptor(FAMILY));
087      hbaseAdmin = master.getConnection().getAdmin();
088      hbaseAdmin.createTable(desc);
089
090      assertTrue(hbaseAdmin.isTableAvailable(tableName));
091
092      // Put data: r1->v1
093      LOG.info("Loading r1 to v1 into " + tableName);
094      Table table = TEST_UTIL.getConnection().getTable(tableName);
095      putDataAndVerify(table, "r1", FAMILY, "v1", 1);
096
097      TEST_UTIL.waitUntilAllRegionsAssigned(table.getName());
098      // Move region to target server
099
100      HRegionInfo regionInfo;
101      try (RegionLocator locator = TEST_UTIL.getConnection().getRegionLocator(tableName)) {
102        regionInfo = locator.getRegionLocation(Bytes.toBytes("r1")).getRegionInfo();
103      }
104
105      int originServerNum = cluster.getServerWith(regionInfo.getRegionName());
106      HRegionServer originServer = cluster.getRegionServer(originServerNum);
107      int targetServerNum = (originServerNum + 1) % NUM_RS;
108      HRegionServer targetServer = cluster.getRegionServer(targetServerNum);
109      assertFalse(originServer.equals(targetServer));
110
111      TEST_UTIL.waitUntilAllRegionsAssigned(table.getName());
112      LOG.info("Moving " + regionInfo.getEncodedName() + " to " + targetServer.getServerName());
113      hbaseAdmin.move(regionInfo.getEncodedNameAsBytes(),
114          Bytes.toBytes(targetServer.getServerName().getServerName()));
115      do {
116        Thread.sleep(1);
117      } while (cluster.getServerWith(regionInfo.getRegionName()) == originServerNum);
118
119      // Put data: r2->v2
120      LOG.info("Loading r2 to v2 into " + tableName);
121      putDataAndVerify(table, "r2", FAMILY, "v2", 2);
122
123      TEST_UTIL.waitUntilAllRegionsAssigned(table.getName());
124      // Move region to origin server
125      LOG.info("Moving " + regionInfo.getEncodedName() + " to " + originServer.getServerName());
126      hbaseAdmin.move(regionInfo.getEncodedNameAsBytes(),
127          Bytes.toBytes(originServer.getServerName().getServerName()));
128      do {
129        Thread.sleep(1);
130      } while (cluster.getServerWith(regionInfo.getRegionName()) == targetServerNum);
131
132      // Put data: r3->v3
133      LOG.info("Loading r3 to v3 into " + tableName);
134      putDataAndVerify(table, "r3", FAMILY, "v3", 3);
135
136      // Kill target server
137      LOG.info("Killing target server " + targetServer.getServerName());
138      targetServer.kill();
139      cluster.getRegionServerThreads().get(targetServerNum).join();
140      // Wait until finish processing of shutdown
141      while (master.getServerManager().areDeadServersInProgress()) {
142        Thread.sleep(5);
143      }
144      // Kill origin server
145      LOG.info("Killing origin server " + targetServer.getServerName());
146      originServer.kill();
147      cluster.getRegionServerThreads().get(originServerNum).join();
148
149      // Put data: r4->v4
150      LOG.info("Loading r4 to v4 into " + tableName);
151      putDataAndVerify(table, "r4", FAMILY, "v4", 4);
152
153    } finally {
154      if (hbaseAdmin != null) hbaseAdmin.close();
155      TEST_UTIL.shutdownMiniCluster();
156    }
157  }
158
159  private void putDataAndVerify(Table table, String row, byte[] family,
160      String value, int verifyNum) throws IOException {
161    System.out.println("=========Putting data :" + row);
162    Put put = new Put(Bytes.toBytes(row));
163    put.addColumn(family, Bytes.toBytes("q1"), Bytes.toBytes(value));
164    table.put(put);
165    ResultScanner resultScanner = table.getScanner(new Scan());
166    List<Result> results = new ArrayList<>();
167    while (true) {
168      Result r = resultScanner.next();
169      if (r == null)
170        break;
171      results.add(r);
172    }
173    resultScanner.close();
174    if (results.size() != verifyNum) {
175      System.out.println(results);
176    }
177    assertEquals(verifyNum, results.size());
178  }
179
180}