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18 package org.apache.hadoop.hbase.master;
19
20 import static org.junit.Assert.assertEquals;
21 import static org.junit.Assert.assertFalse;
22 import static org.junit.Assert.assertNotNull;
23 import static org.mockito.Mockito.when;
24
25 import java.io.IOException;
26 import java.util.Collection;
27 import java.util.Iterator;
28 import java.util.List;
29
30 import org.apache.commons.logging.Log;
31 import org.apache.commons.logging.LogFactory;
32 import org.apache.hadoop.conf.Configuration;
33 import org.apache.hadoop.hbase.*;
34 import org.apache.hadoop.hbase.executor.EventType;
35 import org.apache.hadoop.hbase.master.handler.OpenedRegionHandler;
36 import org.apache.hadoop.hbase.regionserver.HRegion;
37 import org.apache.hadoop.hbase.regionserver.HRegionServer;
38 import org.apache.hadoop.hbase.util.Bytes;
39 import org.apache.hadoop.hbase.util.MockServer;
40 import org.apache.hadoop.hbase.zookeeper.ZKAssign;
41 import org.apache.hadoop.hbase.zookeeper.ZKTable;
42 import org.apache.hadoop.hbase.zookeeper.ZKUtil;
43 import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
44 import org.apache.zookeeper.KeeperException;
45 import org.apache.zookeeper.data.Stat;
46 import org.junit.After;
47 import org.junit.Before;
48 import org.junit.Test;
49 import org.junit.experimental.categories.Category;
50 import org.mockito.Mockito;
51
52 @Category(MediumTests.class)
53 public class TestOpenedRegionHandler {
54
55 private static final Log LOG = LogFactory
56 .getLog(TestOpenedRegionHandler.class);
57
58 private HBaseTestingUtility TEST_UTIL;
59 private final int NUM_MASTERS = 1;
60 private final int NUM_RS = 1;
61 private Configuration conf;
62 private Configuration resetConf;
63 private ZooKeeperWatcher zkw;
64
65 @Before
66 public void setUp() throws Exception {
67 conf = HBaseConfiguration.create();
68 conf.setBoolean("hbase.assignment.usezk", true);
69 TEST_UTIL = HBaseTestingUtility.createLocalHTU(conf);
70 }
71
72 @After
73 public void tearDown() throws Exception {
74
75 TEST_UTIL.shutdownMiniCluster();
76 TEST_UTIL = new HBaseTestingUtility(resetConf);
77 }
78
79 @Test
80 public void testOpenedRegionHandlerOnMasterRestart() throws Exception {
81
82 log("Starting cluster");
83 conf = HBaseConfiguration.create();
84 conf.setBoolean("hbase.assignment.usezk", true);
85 resetConf = conf;
86 conf.setInt("hbase.master.assignment.timeoutmonitor.period", 2000);
87 conf.setInt("hbase.master.assignment.timeoutmonitor.timeout", 5000);
88 TEST_UTIL = new HBaseTestingUtility(conf);
89 TEST_UTIL.startMiniCluster(NUM_MASTERS, NUM_RS);
90 String tableName = "testOpenedRegionHandlerOnMasterRestart";
91 MiniHBaseCluster cluster = createRegions(tableName);
92 abortMaster(cluster);
93
94 HRegionServer regionServer = cluster.getRegionServer(0);
95 HRegion region = getRegionBeingServed(cluster, regionServer);
96
97
98
99 zkw = HBaseTestingUtility.createAndForceNodeToOpenedState(TEST_UTIL,
100 region, regionServer.getServerName());
101
102
103 log("Starting up a new master");
104 cluster.startMaster().getMaster();
105 log("Waiting for master to be ready");
106 cluster.waitForActiveAndReadyMaster();
107 log("Master is ready");
108
109
110 log("Waiting for no more RIT");
111 ZKAssign.blockUntilNoRIT(zkw);
112 }
113 @Test
114 public void testShouldNotCompeleteOpenedRegionSuccessfullyIfVersionMismatches()
115 throws Exception {
116 HRegion region = null;
117 try {
118 int testIndex = 0;
119 TEST_UTIL.startMiniZKCluster();
120 final Server server = new MockServer(TEST_UTIL);
121 HTableDescriptor htd = new HTableDescriptor(
122 TableName.valueOf("testShouldNotCompeleteOpenedRegionSuccessfullyIfVersionMismatches"));
123 HRegionInfo hri = new HRegionInfo(htd.getTableName(),
124 Bytes.toBytes(testIndex), Bytes.toBytes(testIndex + 1));
125 region = HRegion.createHRegion(hri, TEST_UTIL.getDataTestDir(), TEST_UTIL.getConfiguration(), htd);
126 assertNotNull(region);
127 AssignmentManager am = Mockito.mock(AssignmentManager.class);
128 RegionStates rsm = Mockito.mock(RegionStates.class);
129 Mockito.doReturn(rsm).when(am).getRegionStates();
130 when(rsm.isRegionInTransition(hri)).thenReturn(false);
131 when(rsm.getRegionState(hri)).thenReturn(
132 new RegionState(region.getRegionInfo(), RegionState.State.OPEN,
133 System.currentTimeMillis(), server.getServerName()));
134
135 zkw = HBaseTestingUtility.createAndForceNodeToOpenedState(TEST_UTIL,
136 region, server.getServerName());
137 when(am.getZKTable()).thenReturn(new ZKTable(zkw));
138 Stat stat = new Stat();
139 String nodeName = ZKAssign.getNodeName(zkw, region.getRegionInfo()
140 .getEncodedName());
141 ZKUtil.getDataAndWatch(zkw, nodeName, stat);
142
143
144 OpenedRegionHandler handler = new OpenedRegionHandler(server, am, region
145 .getRegionInfo(), server.getServerName(), stat.getVersion());
146
147 ZKAssign.transitionNode(zkw, region.getRegionInfo(), server
148 .getServerName(), EventType.RS_ZK_REGION_OPENED,
149 EventType.RS_ZK_REGION_OPENED, stat.getVersion());
150
151
152
153 boolean expectedException = false;
154 try {
155 handler.process();
156 } catch (Exception e) {
157 expectedException = true;
158 }
159 assertFalse("The process method should not throw any exception.",
160 expectedException);
161 List<String> znodes = ZKUtil.listChildrenAndWatchForNewChildren(zkw,
162 zkw.assignmentZNode);
163 String regionName = znodes.get(0);
164 assertEquals("The region should not be opened successfully.", regionName,
165 region.getRegionInfo().getEncodedName());
166 } finally {
167 HRegion.closeHRegion(region);
168 TEST_UTIL.shutdownMiniZKCluster();
169 }
170 }
171 private MiniHBaseCluster createRegions(String tableName)
172 throws InterruptedException, ZooKeeperConnectionException, IOException,
173 KeeperException {
174 MiniHBaseCluster cluster = TEST_UTIL.getHBaseCluster();
175 log("Waiting for active/ready master");
176 cluster.waitForActiveAndReadyMaster();
177 zkw = new ZooKeeperWatcher(conf, "testOpenedRegionHandler", null);
178
179
180 byte[] table = Bytes.toBytes(tableName);
181 byte[] family = Bytes.toBytes("family");
182 TEST_UTIL.createTable(table, family);
183
184
185 log("Waiting for no more RIT");
186 ZKAssign.blockUntilNoRIT(zkw);
187
188 return cluster;
189 }
190 private void abortMaster(MiniHBaseCluster cluster) {
191
192 log("Aborting master");
193 cluster.abortMaster(0);
194 cluster.waitOnMaster(0);
195 log("Master has aborted");
196 }
197 private HRegion getRegionBeingServed(MiniHBaseCluster cluster,
198 HRegionServer regionServer) {
199 Collection<HRegion> onlineRegionsLocalContext = regionServer
200 .getOnlineRegionsLocalContext();
201 Iterator<HRegion> iterator = onlineRegionsLocalContext.iterator();
202 HRegion region = null;
203 while (iterator.hasNext()) {
204 region = iterator.next();
205 if (!region.getRegionInfo().isMetaTable()) {
206 break;
207 }
208 }
209 return region;
210 }
211 private void log(String msg) {
212 LOG.debug("\n\nTRR: " + msg + "\n");
213 }
214
215 }
216