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.regionserver;
019
020import java.io.IOException;
021import org.apache.hadoop.hbase.HBaseClassTestRule;
022import org.apache.hadoop.hbase.HBaseTestingUtility;
023import org.apache.hadoop.hbase.HConstants;
024import org.apache.hadoop.hbase.HRegionInfo;
025import org.apache.hadoop.hbase.NotServingRegionException;
026import org.apache.hadoop.hbase.ServerName;
027import org.apache.hadoop.hbase.TableName;
028import org.apache.hadoop.hbase.client.Put;
029import org.apache.hadoop.hbase.client.RegionLocator;
030import org.apache.hadoop.hbase.client.Table;
031import org.apache.hadoop.hbase.client.TableDescriptor;
032import org.apache.hadoop.hbase.master.HMaster;
033import org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler;
034import org.apache.hadoop.hbase.testclassification.MediumTests;
035import org.apache.hadoop.hbase.testclassification.RegionServerTests;
036import org.apache.hadoop.hbase.util.Bytes;
037import org.apache.hadoop.hbase.util.JVMClusterUtil.RegionServerThread;
038import org.apache.hadoop.hbase.util.Threads;
039import org.apache.hadoop.hbase.zookeeper.MetaTableLocator;
040import org.apache.hadoop.hbase.zookeeper.ZKWatcher;
041import org.junit.AfterClass;
042import org.junit.Assert;
043import org.junit.BeforeClass;
044import org.junit.ClassRule;
045import org.junit.Test;
046import org.junit.experimental.categories.Category;
047import org.slf4j.Logger;
048import org.slf4j.LoggerFactory;
049
050import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;
051import org.apache.hadoop.hbase.shaded.protobuf.RequestConverter;
052import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos;
053import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.CloseRegionRequest;
054
055/**
056 * Tests on the region server, without the master.
057 */
058@Category({RegionServerTests.class, MediumTests.class})
059public class TestRegionServerNoMaster {
060
061  @ClassRule
062  public static final HBaseClassTestRule CLASS_RULE =
063      HBaseClassTestRule.forClass(TestRegionServerNoMaster.class);
064
065  private static final Logger LOG = LoggerFactory.getLogger(TestRegionServerNoMaster.class);
066  private static final int NB_SERVERS = 1;
067  private static Table table;
068  private static final byte[] row = Bytes.toBytes("ee");
069
070  private static HRegionInfo hri;
071
072  private static byte[] regionName;
073  private static final HBaseTestingUtility HTU = new HBaseTestingUtility();
074
075
076  @BeforeClass
077  public static void before() throws Exception {
078    HTU.startMiniCluster(NB_SERVERS);
079    final TableName tableName = TableName.valueOf(TestRegionServerNoMaster.class.getSimpleName());
080
081    // Create table then get the single region for our new table.
082    table = HTU.createTable(tableName,HConstants.CATALOG_FAMILY);
083    Put p = new Put(row);
084    p.addColumn(HConstants.CATALOG_FAMILY, row, row);
085    table.put(p);
086
087    try (RegionLocator locator = HTU.getConnection().getRegionLocator(tableName)) {
088      hri = locator.getRegionLocation(row, false).getRegionInfo();
089    }
090    regionName = hri.getRegionName();
091
092    stopMasterAndAssignMeta(HTU);
093  }
094
095  public static void stopMasterAndAssignMeta(HBaseTestingUtility HTU)
096      throws IOException, InterruptedException {
097    // Stop master
098    HMaster master = HTU.getHBaseCluster().getMaster();
099    Thread masterThread = HTU.getHBaseCluster().getMasterThread();
100    ServerName masterAddr = master.getServerName();
101    master.stopMaster();
102
103    LOG.info("Waiting until master thread exits");
104    while (masterThread != null && masterThread.isAlive()) {
105      Threads.sleep(100);
106    }
107
108    HRegionServer.TEST_SKIP_REPORTING_TRANSITION = true;
109    // Master is down, so is the meta. We need to assign it somewhere
110    // so that regions can be assigned during the mocking phase.
111    HRegionServer hrs = HTU.getHBaseCluster()
112      .getLiveRegionServerThreads().get(0).getRegionServer();
113    ZKWatcher zkw = hrs.getZooKeeper();
114    ServerName sn = MetaTableLocator.getMetaRegionLocation(zkw);
115    if (sn != null && !masterAddr.equals(sn)) {
116      return;
117    }
118
119    ProtobufUtil.openRegion(null, hrs.getRSRpcServices(),
120      hrs.getServerName(), HRegionInfo.FIRST_META_REGIONINFO);
121    while (true) {
122      sn = MetaTableLocator.getMetaRegionLocation(zkw);
123      if (sn != null && sn.equals(hrs.getServerName())
124          && hrs.onlineRegions.containsKey(
125              HRegionInfo.FIRST_META_REGIONINFO.getEncodedName())) {
126        break;
127      }
128      Thread.sleep(100);
129    }
130  }
131
132  /** Flush the given region in the mini cluster. Since no master, we cannot use HBaseAdmin.flush() */
133  public static void flushRegion(HBaseTestingUtility HTU, HRegionInfo regionInfo) throws IOException {
134    for (RegionServerThread rst : HTU.getMiniHBaseCluster().getRegionServerThreads()) {
135      HRegion region = rst.getRegionServer().getRegionByEncodedName(regionInfo.getEncodedName());
136      if (region != null) {
137        region.flush(true);
138        return;
139      }
140    }
141    throw new IOException("Region to flush cannot be found");
142  }
143
144  @AfterClass
145  public static void afterClass() throws Exception {
146    HRegionServer.TEST_SKIP_REPORTING_TRANSITION = false;
147    table.close();
148    HTU.shutdownMiniCluster();
149  }
150
151  private static HRegionServer getRS() {
152    return HTU.getHBaseCluster().getLiveRegionServerThreads().get(0).getRegionServer();
153  }
154
155
156  public static void openRegion(HBaseTestingUtility HTU, HRegionServer rs, HRegionInfo hri)
157      throws Exception {
158    AdminProtos.OpenRegionRequest orr =
159      RequestConverter.buildOpenRegionRequest(rs.getServerName(), hri, null);
160    AdminProtos.OpenRegionResponse responseOpen = rs.rpcServices.openRegion(null, orr);
161
162    Assert.assertTrue(responseOpen.getOpeningStateCount() == 1);
163    Assert.assertTrue(responseOpen.getOpeningState(0).
164        equals(AdminProtos.OpenRegionResponse.RegionOpeningState.OPENED));
165
166
167    checkRegionIsOpened(HTU, rs, hri);
168  }
169
170  public static void checkRegionIsOpened(HBaseTestingUtility HTU, HRegionServer rs,
171      HRegionInfo hri) throws Exception {
172    while (!rs.getRegionsInTransitionInRS().isEmpty()) {
173      Thread.sleep(1);
174    }
175
176    Assert.assertTrue(rs.getRegion(hri.getRegionName()).isAvailable());
177  }
178
179  public static void closeRegion(HBaseTestingUtility HTU, HRegionServer rs, HRegionInfo hri)
180      throws Exception {
181    AdminProtos.CloseRegionRequest crr = ProtobufUtil.buildCloseRegionRequest(
182      rs.getServerName(), hri.getRegionName());
183    AdminProtos.CloseRegionResponse responseClose = rs.rpcServices.closeRegion(null, crr);
184    Assert.assertTrue(responseClose.getClosed());
185    checkRegionIsClosed(HTU, rs, hri);
186  }
187
188  public static void checkRegionIsClosed(HBaseTestingUtility HTU, HRegionServer rs,
189      HRegionInfo hri) throws Exception {
190    while (!rs.getRegionsInTransitionInRS().isEmpty()) {
191      Thread.sleep(1);
192    }
193
194    try {
195      Assert.assertFalse(rs.getRegion(hri.getRegionName()).isAvailable());
196    } catch (NotServingRegionException expected) {
197      // That's how it work: if the region is closed we have an exception.
198    }
199  }
200
201  /**
202   * Close the region without using ZK
203   */
204  private void closeRegionNoZK() throws Exception {
205    // no transition in ZK
206    AdminProtos.CloseRegionRequest crr =
207        ProtobufUtil.buildCloseRegionRequest(getRS().getServerName(), regionName);
208    AdminProtos.CloseRegionResponse responseClose = getRS().rpcServices.closeRegion(null, crr);
209    Assert.assertTrue(responseClose.getClosed());
210
211    // now waiting & checking. After a while, the transition should be done and the region closed
212    checkRegionIsClosed(HTU, getRS(), hri);
213  }
214
215
216  @Test
217  public void testCloseByRegionServer() throws Exception {
218    closeRegionNoZK();
219    openRegion(HTU, getRS(), hri);
220  }
221
222  @Test
223  public void testMultipleCloseFromMaster() throws Exception {
224    for (int i = 0; i < 10; i++) {
225      AdminProtos.CloseRegionRequest crr =
226          ProtobufUtil.buildCloseRegionRequest(getRS().getServerName(), regionName, null);
227      try {
228        AdminProtos.CloseRegionResponse responseClose = getRS().rpcServices.closeRegion(null, crr);
229        Assert.assertTrue("request " + i + " failed",
230            responseClose.getClosed() || responseClose.hasClosed());
231      } catch (org.apache.hbase.thirdparty.com.google.protobuf.ServiceException se) {
232        Assert.assertTrue("The next queries may throw an exception.", i > 0);
233      }
234    }
235
236    checkRegionIsClosed(HTU, getRS(), hri);
237
238    openRegion(HTU, getRS(), hri);
239  }
240
241  /**
242   * Test that if we do a close while opening it stops the opening.
243   */
244  @Test
245  public void testCancelOpeningWithoutZK() throws Exception {
246    // We close
247    closeRegionNoZK();
248    checkRegionIsClosed(HTU, getRS(), hri);
249
250    // Let do the initial steps, without having a handler
251    getRS().getRegionsInTransitionInRS().put(hri.getEncodedNameAsBytes(), Boolean.TRUE);
252
253    // That's a close without ZK.
254    AdminProtos.CloseRegionRequest crr =
255        ProtobufUtil.buildCloseRegionRequest(getRS().getServerName(), regionName);
256    try {
257      getRS().rpcServices.closeRegion(null, crr);
258      Assert.assertTrue(false);
259    } catch (org.apache.hbase.thirdparty.com.google.protobuf.ServiceException expected) {
260    }
261
262    // The state in RIT should have changed to close
263    Assert.assertEquals(Boolean.FALSE, getRS().getRegionsInTransitionInRS().get(
264        hri.getEncodedNameAsBytes()));
265
266    // Let's start the open handler
267    TableDescriptor htd = getRS().tableDescriptors.get(hri.getTable());
268
269    getRS().executorService.submit(new OpenRegionHandler(getRS(), getRS(), hri, htd, -1));
270
271    // The open handler should have removed the region from RIT but kept the region closed
272    checkRegionIsClosed(HTU, getRS(), hri);
273
274    openRegion(HTU, getRS(), hri);
275  }
276
277  /**
278   * Tests an on-the-fly RPC that was scheduled for the earlier RS on the same port
279   * for openRegion. The region server should reject this RPC. (HBASE-9721)
280   */
281  @Test
282  public void testOpenCloseRegionRPCIntendedForPreviousServer() throws Exception {
283    Assert.assertTrue(getRS().getRegion(regionName).isAvailable());
284
285    ServerName sn = getRS().getServerName();
286    ServerName earlierServerName = ServerName.valueOf(sn.getHostname(), sn.getPort(), 1);
287
288    try {
289      CloseRegionRequest request = ProtobufUtil.buildCloseRegionRequest(earlierServerName, regionName);
290      getRS().getRSRpcServices().closeRegion(null, request);
291      Assert.fail("The closeRegion should have been rejected");
292    } catch (org.apache.hbase.thirdparty.com.google.protobuf.ServiceException se) {
293      Assert.assertTrue(se.getCause() instanceof IOException);
294      Assert.assertTrue(se.getCause().getMessage().contains("This RPC was intended for a different server"));
295    }
296
297    //actual close
298    closeRegionNoZK();
299    try {
300      AdminProtos.OpenRegionRequest orr = RequestConverter.buildOpenRegionRequest(
301        earlierServerName, hri, null);
302      getRS().getRSRpcServices().openRegion(null, orr);
303      Assert.fail("The openRegion should have been rejected");
304    } catch (org.apache.hbase.thirdparty.com.google.protobuf.ServiceException se) {
305      Assert.assertTrue(se.getCause() instanceof IOException);
306      Assert.assertTrue(se.getCause().getMessage().contains("This RPC was intended for a different server"));
307    } finally {
308      openRegion(HTU, getRS(), hri);
309    }
310  }
311}