Source code

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.assignment;
019
020import static org.junit.Assert.assertEquals;
021import static org.junit.Assert.assertNull;
022import static org.junit.Assert.assertTrue;
023
024import java.util.concurrent.Executors;
025import java.util.concurrent.Future;
026import org.apache.hadoop.hbase.HBaseClassTestRule;
027import org.apache.hadoop.hbase.HBaseTestingUtility;
028import org.apache.hadoop.hbase.MetaTableAccessor;
029import org.apache.hadoop.hbase.TableName;
030import org.apache.hadoop.hbase.client.RegionInfo;
031import org.apache.hadoop.hbase.client.RegionInfoBuilder;
032import org.apache.hadoop.hbase.master.RegionState.State;
033import org.apache.hadoop.hbase.procedure2.ProcedureTestingUtility;
034import org.apache.hadoop.hbase.procedure2.util.StringUtils;
035import org.apache.hadoop.hbase.testclassification.LargeTests;
036import org.apache.hadoop.hbase.testclassification.MasterTests;
037import org.junit.ClassRule;
038import org.junit.Test;
039import org.junit.experimental.categories.Category;
040import org.slf4j.Logger;
041import org.slf4j.LoggerFactory;
042
043@Category({ MasterTests.class, LargeTests.class })
044public class TestAssignmentManager extends TestAssignmentManagerBase {
045
046  @ClassRule
047  public static final HBaseClassTestRule CLASS_RULE =
048    HBaseClassTestRule.forClass(TestAssignmentManager.class);
049
050  private static final Logger LOG = LoggerFactory.getLogger(TestAssignmentManager.class);
051
052  @Test
053  public void testAssignWithGoodExec() throws Exception {
054    // collect AM metrics before test
055    collectAssignmentManagerMetrics();
056
057    testAssign(new GoodRsExecutor());
058
059    assertEquals(assignSubmittedCount + NREGIONS,
060      assignProcMetrics.getSubmittedCounter().getCount());
061    assertEquals(assignFailedCount, assignProcMetrics.getFailedCounter().getCount());
062  }
063
064  @Test
065  public void testAssignAndCrashBeforeResponse() throws Exception {
066    TableName tableName = TableName.valueOf("testAssignAndCrashBeforeResponse");
067    RegionInfo hri = createRegionInfo(tableName, 1);
068    rsDispatcher.setMockRsExecutor(new HangThenRSCrashExecutor());
069    TransitRegionStateProcedure proc = createAssignProcedure(hri);
070    waitOnFuture(submitProcedure(proc));
071  }
072
073  @Test
074  public void testUnassignAndCrashBeforeResponse() throws Exception {
075    TableName tableName = TableName.valueOf("testAssignAndCrashBeforeResponse");
076    RegionInfo hri = createRegionInfo(tableName, 1);
077    rsDispatcher.setMockRsExecutor(new HangOnCloseThenRSCrashExecutor());
078    for (int i = 0; i < HangOnCloseThenRSCrashExecutor.TYPES_OF_FAILURE; i++) {
079      TransitRegionStateProcedure assign = createAssignProcedure(hri);
080      waitOnFuture(submitProcedure(assign));
081      TransitRegionStateProcedure unassign = createUnassignProcedure(hri);
082      waitOnFuture(submitProcedure(unassign));
083    }
084  }
085
086  @Test
087  public void testAssignSocketTimeout() throws Exception {
088    TableName tableName = TableName.valueOf(this.name.getMethodName());
089    RegionInfo hri = createRegionInfo(tableName, 1);
090
091    // collect AM metrics before test
092    collectAssignmentManagerMetrics();
093
094    rsDispatcher.setMockRsExecutor(new SocketTimeoutRsExecutor(20));
095    waitOnFuture(submitProcedure(createAssignProcedure(hri)));
096
097    // we crashed a rs, so it is possible that there are other regions on the rs which will also be
098    // reassigned, so here we just assert greater than, not the exact number.
099    assertTrue(assignProcMetrics.getSubmittedCounter().getCount() > assignSubmittedCount);
100    assertEquals(assignFailedCount, assignProcMetrics.getFailedCounter().getCount());
101  }
102
103  @Test
104  public void testAssignQueueFullOnce() throws Exception {
105    TableName tableName = TableName.valueOf(this.name.getMethodName());
106    RegionInfo hri = createRegionInfo(tableName, 1);
107
108    // collect AM metrics before test
109    collectAssignmentManagerMetrics();
110
111    rsDispatcher.setMockRsExecutor(new CallQueueTooBigOnceRsExecutor());
112    waitOnFuture(submitProcedure(createAssignProcedure(hri)));
113
114    assertEquals(assignSubmittedCount + 1, assignProcMetrics.getSubmittedCounter().getCount());
115    assertEquals(assignFailedCount, assignProcMetrics.getFailedCounter().getCount());
116  }
117
118  @Test
119  public void testTimeoutThenQueueFull() throws Exception {
120    TableName tableName = TableName.valueOf(this.name.getMethodName());
121    RegionInfo hri = createRegionInfo(tableName, 1);
122
123    // collect AM metrics before test
124    collectAssignmentManagerMetrics();
125
126    rsDispatcher.setMockRsExecutor(new TimeoutThenCallQueueTooBigRsExecutor(10));
127    waitOnFuture(submitProcedure(createAssignProcedure(hri)));
128    rsDispatcher.setMockRsExecutor(new TimeoutThenCallQueueTooBigRsExecutor(15));
129    waitOnFuture(submitProcedure(createUnassignProcedure(hri)));
130
131    assertEquals(assignSubmittedCount + 1, assignProcMetrics.getSubmittedCounter().getCount());
132    assertEquals(assignFailedCount, assignProcMetrics.getFailedCounter().getCount());
133    assertEquals(unassignSubmittedCount + 1, unassignProcMetrics.getSubmittedCounter().getCount());
134    assertEquals(unassignFailedCount, unassignProcMetrics.getFailedCounter().getCount());
135  }
136
137  private void testAssign(final MockRSExecutor executor) throws Exception {
138    testAssign(executor, NREGIONS);
139  }
140
141  private void testAssign(MockRSExecutor executor, int nRegions) throws Exception {
142    rsDispatcher.setMockRsExecutor(executor);
143
144    TransitRegionStateProcedure[] assignments = new TransitRegionStateProcedure[nRegions];
145
146    long st = System.currentTimeMillis();
147    bulkSubmit(assignments);
148
149    for (int i = 0; i < assignments.length; ++i) {
150      ProcedureTestingUtility.waitProcedure(master.getMasterProcedureExecutor(), assignments[i]);
151      assertTrue(assignments[i].toString(), assignments[i].isSuccess());
152    }
153    long et = System.currentTimeMillis();
154    float sec = ((et - st) / 1000.0f);
155    LOG.info(String.format("[T] Assigning %dprocs in %s (%.2fproc/sec)", assignments.length,
156      StringUtils.humanTimeDiff(et - st), assignments.length / sec));
157  }
158
159  @Test
160  public void testAssignAnAssignedRegion() throws Exception {
161    final TableName tableName = TableName.valueOf("testAssignAnAssignedRegion");
162    final RegionInfo hri = createRegionInfo(tableName, 1);
163
164    // collect AM metrics before test
165    collectAssignmentManagerMetrics();
166
167    rsDispatcher.setMockRsExecutor(new GoodRsExecutor());
168
169    Future<byte[]> futureA = submitProcedure(createAssignProcedure(hri));
170
171    // wait first assign
172    waitOnFuture(futureA);
173    am.getRegionStates().isRegionInState(hri, State.OPEN);
174    // Second should be a noop. We should recognize region is already OPEN internally
175    // and skip out doing nothing.
176    // wait second assign
177    Future<byte[]> futureB = submitProcedure(createAssignProcedure(hri));
178    waitOnFuture(futureB);
179    am.getRegionStates().isRegionInState(hri, State.OPEN);
180    // TODO: What else can we do to ensure just a noop.
181
182    // TODO: Though second assign is noop, it's considered success, can noop be handled in a
183    // better way?
184    assertEquals(assignSubmittedCount + 2, assignProcMetrics.getSubmittedCounter().getCount());
185    assertEquals(assignFailedCount, assignProcMetrics.getFailedCounter().getCount());
186  }
187
188  @Test
189  public void testUnassignAnUnassignedRegion() throws Exception {
190    final TableName tableName = TableName.valueOf("testUnassignAnUnassignedRegion");
191    final RegionInfo hri = createRegionInfo(tableName, 1);
192
193    // collect AM metrics before test
194    collectAssignmentManagerMetrics();
195
196    rsDispatcher.setMockRsExecutor(new GoodRsExecutor());
197
198    // assign the region first
199    waitOnFuture(submitProcedure(createAssignProcedure(hri)));
200
201    final Future<byte[]> futureA = submitProcedure(createUnassignProcedure(hri));
202
203    // Wait first unassign.
204    waitOnFuture(futureA);
205    am.getRegionStates().isRegionInState(hri, State.CLOSED);
206    // Second should be a noop. We should recognize region is already CLOSED internally
207    // and skip out doing nothing.
208    final Future<byte[]> futureB = submitProcedure(createUnassignProcedure(hri));
209    waitOnFuture(futureB);
210    // Ensure we are still CLOSED.
211    am.getRegionStates().isRegionInState(hri, State.CLOSED);
212    // TODO: What else can we do to ensure just a noop.
213
214    assertEquals(assignSubmittedCount + 1, assignProcMetrics.getSubmittedCounter().getCount());
215    assertEquals(assignFailedCount, assignProcMetrics.getFailedCounter().getCount());
216    // TODO: Though second unassign is noop, it's considered success, can noop be handled in a
217    // better way?
218    assertEquals(unassignSubmittedCount + 2, unassignProcMetrics.getSubmittedCounter().getCount());
219    assertEquals(unassignFailedCount, unassignProcMetrics.getFailedCounter().getCount());
220  }
221
222  /**
223   * It is possible that when AM send assign meta request to a RS successfully, but RS can not send
224   * back any response, which cause master startup hangs forever
225   */
226  @Test
227  public void testAssignMetaAndCrashBeforeResponse() throws Exception {
228    tearDown();
229    // See setUp(), start HBase until set up meta
230    util = new HBaseTestingUtility();
231    this.executor = Executors.newSingleThreadScheduledExecutor();
232    setupConfiguration(util.getConfiguration());
233    master = new MockMasterServices(util.getConfiguration(), this.regionsToRegionServers);
234    rsDispatcher = new MockRSProcedureDispatcher(master);
235    master.start(NSERVERS, rsDispatcher);
236    am = master.getAssignmentManager();
237
238    // Assign meta
239    rsDispatcher.setMockRsExecutor(new HangThenRSRestartExecutor());
240    am.assign(RegionInfoBuilder.FIRST_META_REGIONINFO);
241    assertEquals(true, am.isMetaAssigned());
242
243    // set it back as default, see setUpMeta()
244    am.wakeMetaLoadedEvent();
245  }
246
247  private void assertCloseThenOpen() {
248    assertEquals(closeSubmittedCount + 1, closeProcMetrics.getSubmittedCounter().getCount());
249    assertEquals(closeFailedCount, closeProcMetrics.getFailedCounter().getCount());
250    assertEquals(openSubmittedCount + 1, openProcMetrics.getSubmittedCounter().getCount());
251    assertEquals(openFailedCount, openProcMetrics.getFailedCounter().getCount());
252  }
253
254  @Test
255  public void testMove() throws Exception {
256    TableName tableName = TableName.valueOf("testMove");
257    RegionInfo hri = createRegionInfo(tableName, 1);
258    rsDispatcher.setMockRsExecutor(new GoodRsExecutor());
259    am.assign(hri);
260
261    // collect AM metrics before test
262    collectAssignmentManagerMetrics();
263
264    am.move(hri);
265
266    assertEquals(moveSubmittedCount + 1, moveProcMetrics.getSubmittedCounter().getCount());
267    assertEquals(moveFailedCount, moveProcMetrics.getFailedCounter().getCount());
268    assertCloseThenOpen();
269  }
270
271  @Test
272  public void testReopen() throws Exception {
273    TableName tableName = TableName.valueOf("testReopen");
274    RegionInfo hri = createRegionInfo(tableName, 1);
275    rsDispatcher.setMockRsExecutor(new GoodRsExecutor());
276    am.assign(hri);
277
278    // collect AM metrics before test
279    collectAssignmentManagerMetrics();
280
281    TransitRegionStateProcedure proc =
282      TransitRegionStateProcedure.reopen(master.getMasterProcedureExecutor().getEnvironment(), hri);
283    am.getRegionStates().getRegionStateNode(hri).setProcedure(proc);
284    waitOnFuture(submitProcedure(proc));
285
286    assertEquals(reopenSubmittedCount + 1, reopenProcMetrics.getSubmittedCounter().getCount());
287    assertEquals(reopenFailedCount, reopenProcMetrics.getFailedCounter().getCount());
288    assertCloseThenOpen();
289  }
290
291  @Test
292  public void testLoadRegionFromMetaAfterRegionManuallyAdded() throws Exception {
293    try {
294      this.util.startMiniCluster();
295      final AssignmentManager am = this.util.getHBaseCluster().getMaster().getAssignmentManager();
296      final TableName tableName = TableName.
297        valueOf("testLoadRegionFromMetaAfterRegionManuallyAdded");
298      this.util.createTable(tableName, "f");
299      RegionInfo hri = createRegionInfo(tableName, 1);
300      assertNull("RegionInfo was just instantiated by the test, but "
301        + "shouldn't be in AM regionStates yet.", am.getRegionStates().getRegionState(hri));
302      MetaTableAccessor.addRegionToMeta(this.util.getConnection(), hri);
303      assertNull("RegionInfo was manually added in META, but "
304        + "shouldn't be in AM regionStates yet.", am.getRegionStates().getRegionState(hri));
305      hri = am.loadRegionFromMeta(hri.getEncodedName());
306      assertEquals(hri.getEncodedName(),
307        am.getRegionStates().getRegionState(hri).getRegion().getEncodedName());
308    }finally {
309      this.util.killMiniHBaseCluster();
310    }
311  }
312
313  @Test
314  public void testLoadRegionFromMetaRegionNotInMeta() throws Exception {
315    try {
316      this.util.startMiniCluster();
317      final AssignmentManager am = this.util.getHBaseCluster().getMaster().getAssignmentManager();
318      final TableName tableName = TableName.valueOf("testLoadRegionFromMetaRegionNotInMeta");
319      this.util.createTable(tableName, "f");
320      final RegionInfo hri = createRegionInfo(tableName, 1);
321      assertNull("RegionInfo was just instantiated by the test, but "
322        + "shouldn't be in AM regionStates yet.", am.getRegionStates().getRegionState(hri));
323      assertNull("RegionInfo was never added in META, should had returned null.",
324        am.loadRegionFromMeta(hri.getEncodedName()));
325    }finally {
326      this.util.killMiniHBaseCluster();
327    }
328  }
329}