Java ZkCoordinatedStateManager.start方法代码示例

import org.apache.hadoop.hbase.coordination.ZkCoordinatedStateManager; //导入方法依赖的package包/类
/**
 * Test if close region can handle ZK closing node version mismatch
 * @throws IOException
 * @throws NodeExistsException
 * @throws KeeperException
* @throws DeserializationException
 */
@Test public void testZKClosingNodeVersionMismatch()
throws IOException, NodeExistsException, KeeperException, DeserializationException {
  final Server server = new MockServer(HTU);
  final RegionServerServices rss = HTU.createMockRegionServerService();

  HTableDescriptor htd = TEST_HTD;
  final HRegionInfo hri = TEST_HRI;

  ZkCoordinatedStateManager coordinationProvider = new ZkCoordinatedStateManager();
  coordinationProvider.initialize(server);
  coordinationProvider.start();

  // open a region first so that it can be closed later
  OpenRegion(server, rss, htd, hri, coordinationProvider.getOpenRegionCoordination());

  // close the region
  // Create it CLOSING, which is what Master set before sending CLOSE RPC
  int versionOfClosingNode = ZKAssign.createNodeClosing(server.getZooKeeper(),
    hri, server.getServerName());

  // The CloseRegionHandler will validate the expected version
  // Given it is set to invalid versionOfClosingNode+1,
  // CloseRegionHandler should be M_ZK_REGION_CLOSING

  ZkCloseRegionCoordination.ZkCloseRegionDetails zkCrd =
    new ZkCloseRegionCoordination.ZkCloseRegionDetails();
  zkCrd.setPublishStatusInZk(true);
  zkCrd.setExpectedVersion(versionOfClosingNode+1);

  CloseRegionHandler handler = new CloseRegionHandler(server, rss, hri, false,
    coordinationProvider.getCloseRegionCoordination(), zkCrd);
  handler.process();

  // Handler should remain in M_ZK_REGION_CLOSING
  RegionTransition rt =
    RegionTransition.parseFrom(ZKAssign.getData(server.getZooKeeper(), hri.getEncodedName()));
  assertTrue(rt.getEventType().equals(EventType.M_ZK_REGION_CLOSING ));
}
 

import org.apache.hadoop.hbase.coordination.ZkCoordinatedStateManager; //导入方法依赖的package包/类
/**
 * Test if the region can be closed properly
 * @throws IOException
 * @throws NodeExistsException
 * @throws KeeperException
* @throws org.apache.hadoop.hbase.exceptions.DeserializationException
 */
@Test public void testCloseRegion()
throws IOException, NodeExistsException, KeeperException, DeserializationException {
  final Server server = new MockServer(HTU);
  final RegionServerServices rss = HTU.createMockRegionServerService();

  HTableDescriptor htd = TEST_HTD;
  HRegionInfo hri = TEST_HRI;

  ZkCoordinatedStateManager coordinationProvider = new ZkCoordinatedStateManager();
  coordinationProvider.initialize(server);
  coordinationProvider.start();

  // open a region first so that it can be closed later
  OpenRegion(server, rss, htd, hri, coordinationProvider.getOpenRegionCoordination());

  // close the region
  // Create it CLOSING, which is what Master set before sending CLOSE RPC
  int versionOfClosingNode = ZKAssign.createNodeClosing(server.getZooKeeper(),
    hri, server.getServerName());

  // The CloseRegionHandler will validate the expected version
  // Given it is set to correct versionOfClosingNode,
  // CloseRegionHandlerit should be RS_ZK_REGION_CLOSED

  ZkCloseRegionCoordination.ZkCloseRegionDetails zkCrd =
    new ZkCloseRegionCoordination.ZkCloseRegionDetails();
  zkCrd.setPublishStatusInZk(true);
  zkCrd.setExpectedVersion(versionOfClosingNode);

  CloseRegionHandler handler = new CloseRegionHandler(server, rss, hri, false,
    coordinationProvider.getCloseRegionCoordination(), zkCrd);
  handler.process();
  // Handler should have transitioned it to RS_ZK_REGION_CLOSED
  RegionTransition rt = RegionTransition.parseFrom(
    ZKAssign.getData(server.getZooKeeper(), hri.getEncodedName()));
  assertTrue(rt.getEventType().equals(EventType.RS_ZK_REGION_CLOSED));
}
 

import org.apache.hadoop.hbase.coordination.ZkCoordinatedStateManager; //导入方法依赖的package包/类
@Test
public void testFailedOpenRegion() throws Exception {
  Server server = new MockServer(HTU);
  RegionServerServices rsServices = HTU.createMockRegionServerService();

  // Create it OFFLINE, which is what it expects
  ZKAssign.createNodeOffline(server.getZooKeeper(), TEST_HRI, server.getServerName());

  ZkCoordinatedStateManager csm = new ZkCoordinatedStateManager();
  csm.initialize(server);
  csm.start();

  ZkOpenRegionCoordination.ZkOpenRegionDetails zkCrd =
    new ZkOpenRegionCoordination.ZkOpenRegionDetails();
  zkCrd.setServerName(server.getServerName());

  // Create the handler
  OpenRegionHandler handler =
    new OpenRegionHandler(server, rsServices, TEST_HRI, TEST_HTD, -1,
      csm.getOpenRegionCoordination(), zkCrd) {
      @Override
      HRegion openRegion() {
        // Fake failure of opening a region due to an IOE, which is caught
        return null;
      }
  };
  rsServices.getRegionsInTransitionInRS().put(
    TEST_HRI.getEncodedNameAsBytes(), Boolean.TRUE);
  handler.process();

  // Handler should have transitioned it to FAILED_OPEN
  RegionTransition rt = RegionTransition.parseFrom(
    ZKAssign.getData(server.getZooKeeper(), TEST_HRI.getEncodedName()));
  assertEquals(EventType.RS_ZK_REGION_FAILED_OPEN, rt.getEventType());
}
 

import org.apache.hadoop.hbase.coordination.ZkCoordinatedStateManager; //导入方法依赖的package包/类
@Test
public void testFailedUpdateMeta() throws Exception {
  Server server = new MockServer(HTU);
  RegionServerServices rsServices = HTU.createMockRegionServerService();

  // Create it OFFLINE, which is what it expects
  ZKAssign.createNodeOffline(server.getZooKeeper(), TEST_HRI, server.getServerName());

  // Create the handler
  ZkCoordinatedStateManager csm = new ZkCoordinatedStateManager();
  csm.initialize(server);
  csm.start();

  ZkOpenRegionCoordination.ZkOpenRegionDetails zkCrd =
    new ZkOpenRegionCoordination.ZkOpenRegionDetails();
  zkCrd.setServerName(server.getServerName());

  OpenRegionHandler handler = new OpenRegionHandler(server, rsServices, TEST_HRI, TEST_HTD,
    -1, csm.getOpenRegionCoordination(), zkCrd) {
      @Override
      boolean updateMeta(final HRegion r, long masterSystemTime) {
        // Fake failure of updating META
        return false;
      }
  };
  rsServices.getRegionsInTransitionInRS().put(
    TEST_HRI.getEncodedNameAsBytes(), Boolean.TRUE);
  handler.process();

  // Handler should have transitioned it to FAILED_OPEN
  RegionTransition rt = RegionTransition.parseFrom(
    ZKAssign.getData(server.getZooKeeper(), TEST_HRI.getEncodedName()));
  assertEquals(EventType.RS_ZK_REGION_FAILED_OPEN, rt.getEventType());
}
 

import org.apache.hadoop.hbase.coordination.ZkCoordinatedStateManager; //导入方法依赖的package包/类
@Test
public void testTransitionToFailedOpenEvenIfCleanupFails() throws Exception {
  Server server = new MockServer(HTU);
  RegionServerServices rsServices = HTU.createMockRegionServerService();
  // Create it OFFLINE, which is what it expects
  ZKAssign.createNodeOffline(server.getZooKeeper(), TEST_HRI, server.getServerName());
  // Create the handler
  ZkCoordinatedStateManager csm = new ZkCoordinatedStateManager();
  csm.initialize(server);
  csm.start();

  ZkOpenRegionCoordination.ZkOpenRegionDetails zkCrd =
    new ZkOpenRegionCoordination.ZkOpenRegionDetails();
  zkCrd.setServerName(server.getServerName());

  OpenRegionHandler handler = new OpenRegionHandler(server, rsServices, TEST_HRI, TEST_HTD,
    -1, csm.getOpenRegionCoordination(), zkCrd) {
    @Override
    boolean updateMeta(HRegion r, long masterSystemTime) {
      return false;
    };

    @Override
    void cleanupFailedOpen(HRegion region) throws IOException {
      throw new IOException("FileSystem got closed.");
    }
  };
  rsServices.getRegionsInTransitionInRS().put(TEST_HRI.getEncodedNameAsBytes(), Boolean.TRUE);
  try {
    handler.process();
  } catch (Exception e) {
    // Ignore the IOException that we have thrown from cleanupFailedOpen
  }
  RegionTransition rt = RegionTransition.parseFrom(ZKAssign.getData(server.getZooKeeper(),
      TEST_HRI.getEncodedName()));
  assertEquals(EventType.RS_ZK_REGION_FAILED_OPEN, rt.getEventType());
}
 

import org.apache.hadoop.hbase.coordination.ZkCoordinatedStateManager; //导入方法依赖的package包/类
@Test
public void testTransitionToFailedOpenFromOffline() throws Exception {
  Server server = new MockServer(HTU);
  RegionServerServices rsServices = HTU.createMockRegionServerService(server.getServerName());
  // Create it OFFLINE, which is what it expects
  ZKAssign.createNodeOffline(server.getZooKeeper(), TEST_HRI, server.getServerName());
  // Create the handler
  ZkCoordinatedStateManager csm = new ZkCoordinatedStateManager();
  csm.initialize(server);
  csm.start();

  ZkOpenRegionCoordination.ZkOpenRegionDetails zkCrd =
    new ZkOpenRegionCoordination.ZkOpenRegionDetails();
  zkCrd.setServerName(server.getServerName());

  ZkOpenRegionCoordination openRegionCoordination =
    new ZkOpenRegionCoordination(csm, server.getZooKeeper()) {
    @Override
    public boolean transitionFromOfflineToOpening(HRegionInfo regionInfo,
                                                  OpenRegionDetails ord) {
      return false;
    }
  };

  OpenRegionHandler handler = new OpenRegionHandler(server, rsServices, TEST_HRI, TEST_HTD,
    -1, openRegionCoordination, zkCrd);
  rsServices.getRegionsInTransitionInRS().put(TEST_HRI.getEncodedNameAsBytes(), Boolean.TRUE);

  handler.process();

  RegionTransition rt = RegionTransition.parseFrom(ZKAssign.getData(server.getZooKeeper(),
      TEST_HRI.getEncodedName()));
  assertEquals(EventType.RS_ZK_REGION_FAILED_OPEN, rt.getEventType());
}
 

import org.apache.hadoop.hbase.coordination.ZkCoordinatedStateManager; //导入方法依赖的package包/类
@Test
public void testFailedOpenRegion() throws Exception {
  Server server = new MockServer(HTU);
  RegionServerServices rsServices = HTU.createMockRegionServerService();

  // Create it OFFLINE, which is what it expects
  ZKAssign.createNodeOffline(server.getZooKeeper(), TEST_HRI, server.getServerName());

  ZkCoordinatedStateManager csm = new ZkCoordinatedStateManager();
  csm.initialize(server);
  csm.start();

  ZkOpenRegionCoordination.ZkOpenRegionDetails zkCrd =
    new ZkOpenRegionCoordination.ZkOpenRegionDetails();
  zkCrd.setServerName(server.getServerName());

  // Create the handler
  OpenRegionHandler handler =
    new OpenRegionHandler(server, rsServices, TEST_HRI, TEST_HTD,
      csm.getOpenRegionCoordination(), zkCrd) {
      @Override
      HRegion openRegion() {
        // Fake failure of opening a region due to an IOE, which is caught
        return null;
      }
  };
  rsServices.getRegionsInTransitionInRS().put(
    TEST_HRI.getEncodedNameAsBytes(), Boolean.TRUE);
  handler.process();

  // Handler should have transitioned it to FAILED_OPEN
  RegionTransition rt = RegionTransition.parseFrom(
    ZKAssign.getData(server.getZooKeeper(), TEST_HRI.getEncodedName()));
  assertEquals(EventType.RS_ZK_REGION_FAILED_OPEN, rt.getEventType());
}
 

import org.apache.hadoop.hbase.coordination.ZkCoordinatedStateManager; //导入方法依赖的package包/类
@Test
public void testFailedUpdateMeta() throws Exception {
  Server server = new MockServer(HTU);
  RegionServerServices rsServices = HTU.createMockRegionServerService();

  // Create it OFFLINE, which is what it expects
  ZKAssign.createNodeOffline(server.getZooKeeper(), TEST_HRI, server.getServerName());

  // Create the handler
  ZkCoordinatedStateManager csm = new ZkCoordinatedStateManager();
  csm.initialize(server);
  csm.start();

  ZkOpenRegionCoordination.ZkOpenRegionDetails zkCrd =
    new ZkOpenRegionCoordination.ZkOpenRegionDetails();
  zkCrd.setServerName(server.getServerName());

  OpenRegionHandler handler = new OpenRegionHandler(server, rsServices, TEST_HRI, TEST_HTD,
    csm.getOpenRegionCoordination(), zkCrd) {
      @Override
      boolean updateMeta(final HRegion r) {
        // Fake failure of updating META
        return false;
      }
  };
  rsServices.getRegionsInTransitionInRS().put(
    TEST_HRI.getEncodedNameAsBytes(), Boolean.TRUE);
  handler.process();

  // Handler should have transitioned it to FAILED_OPEN
  RegionTransition rt = RegionTransition.parseFrom(
    ZKAssign.getData(server.getZooKeeper(), TEST_HRI.getEncodedName()));
  assertEquals(EventType.RS_ZK_REGION_FAILED_OPEN, rt.getEventType());
}
 

import org.apache.hadoop.hbase.coordination.ZkCoordinatedStateManager; //导入方法依赖的package包/类
@Test
public void testTransitionToFailedOpenEvenIfCleanupFails() throws Exception {
  Server server = new MockServer(HTU);
  RegionServerServices rsServices = HTU.createMockRegionServerService();
  // Create it OFFLINE, which is what it expects
  ZKAssign.createNodeOffline(server.getZooKeeper(), TEST_HRI, server.getServerName());
  // Create the handler
  ZkCoordinatedStateManager csm = new ZkCoordinatedStateManager();
  csm.initialize(server);
  csm.start();

  ZkOpenRegionCoordination.ZkOpenRegionDetails zkCrd =
    new ZkOpenRegionCoordination.ZkOpenRegionDetails();
  zkCrd.setServerName(server.getServerName());

  OpenRegionHandler handler = new OpenRegionHandler(server, rsServices, TEST_HRI, TEST_HTD,
    csm.getOpenRegionCoordination(), zkCrd) {
    @Override
    boolean updateMeta(HRegion r) {
      return false;
    };

    @Override
    void cleanupFailedOpen(HRegion region) throws IOException {
      throw new IOException("FileSystem got closed.");
    }
  };
  rsServices.getRegionsInTransitionInRS().put(TEST_HRI.getEncodedNameAsBytes(), Boolean.TRUE);
  try {
    handler.process();
  } catch (Exception e) {
    // Ignore the IOException that we have thrown from cleanupFailedOpen
  }
  RegionTransition rt = RegionTransition.parseFrom(ZKAssign.getData(server.getZooKeeper(),
      TEST_HRI.getEncodedName()));
  assertEquals(EventType.RS_ZK_REGION_FAILED_OPEN, rt.getEventType());
}
 

import org.apache.hadoop.hbase.coordination.ZkCoordinatedStateManager; //导入方法依赖的package包/类
@Test
public void testTransitionToFailedOpenFromOffline() throws Exception {
  Server server = new MockServer(HTU);
  RegionServerServices rsServices = HTU.createMockRegionServerService(server.getServerName());
  // Create it OFFLINE, which is what it expects
  ZKAssign.createNodeOffline(server.getZooKeeper(), TEST_HRI, server.getServerName());
  // Create the handler
  ZkCoordinatedStateManager csm = new ZkCoordinatedStateManager();
  csm.initialize(server);
  csm.start();

  ZkOpenRegionCoordination.ZkOpenRegionDetails zkCrd =
    new ZkOpenRegionCoordination.ZkOpenRegionDetails();
  zkCrd.setServerName(server.getServerName());

  ZkOpenRegionCoordination openRegionCoordination =
    new ZkOpenRegionCoordination(csm, server.getZooKeeper()) {
    @Override
    public boolean transitionFromOfflineToOpening(HRegionInfo regionInfo,
                                                  OpenRegionDetails ord) {
      return false;
    }
  };

  OpenRegionHandler handler = new OpenRegionHandler(server, rsServices, TEST_HRI, TEST_HTD,
    openRegionCoordination, zkCrd);
  rsServices.getRegionsInTransitionInRS().put(TEST_HRI.getEncodedNameAsBytes(), Boolean.TRUE);

  handler.process();

  RegionTransition rt = RegionTransition.parseFrom(ZKAssign.getData(server.getZooKeeper(),
      TEST_HRI.getEncodedName()));
  assertEquals(EventType.RS_ZK_REGION_FAILED_OPEN, rt.getEventType());
}
 

import org.apache.hadoop.hbase.coordination.ZkCoordinatedStateManager; //导入方法依赖的package包/类
/**
 * Test that if we fail a flush, abort gets set on close.
 * @see <a href="https://issues.apache.org/jira/browse/HBASE-4270">HBASE-4270</a>
 * @throws IOException
 * @throws NodeExistsException
 * @throws KeeperException
 */
@Test public void testFailedFlushAborts()
throws IOException, NodeExistsException, KeeperException {
  final Server server = new MockServer(HTU, false);
  final RegionServerServices rss = HTU.createMockRegionServerService();
  HTableDescriptor htd = TEST_HTD;
  final HRegionInfo hri =
    new HRegionInfo(htd.getTableName(), HConstants.EMPTY_END_ROW,
      HConstants.EMPTY_END_ROW);
  HRegion region = HTU.createLocalHRegion(hri,  htd);
  try {
    assertNotNull(region);
    // Spy on the region so can throw exception when close is called.
    HRegion spy = Mockito.spy(region);
    final boolean abort = false;
    Mockito.when(spy.close(abort)).
    thenThrow(new IOException("Mocked failed close!"));
    // The CloseRegionHandler will try to get an HRegion that corresponds
    // to the passed hri -- so insert the region into the online region Set.
    rss.addToOnlineRegions(spy);
    // Assert the Server is NOT stopped before we call close region.
    assertFalse(server.isStopped());

    ZkCoordinatedStateManager consensusProvider = new ZkCoordinatedStateManager();
    consensusProvider.initialize(server);
    consensusProvider.start();

    ZkCloseRegionCoordination.ZkCloseRegionDetails zkCrd =
      new ZkCloseRegionCoordination.ZkCloseRegionDetails();
    zkCrd.setPublishStatusInZk(false);
    zkCrd.setExpectedVersion(-1);

    CloseRegionHandler handler = new CloseRegionHandler(server, rss, hri, false,
          consensusProvider.getCloseRegionCoordination(), zkCrd);
    boolean throwable = false;
    try {
      handler.process();
    } catch (Throwable t) {
      throwable = true;
    } finally {
      assertTrue(throwable);
      // Abort calls stop so stopped flag should be set.
      assertTrue(server.isStopped());
    }
  } finally {
    HRegion.closeHRegion(region);
  }
}
 

import org.apache.hadoop.hbase.coordination.ZkCoordinatedStateManager; //导入方法依赖的package包/类
/**
 * Test the openregionhandler can deal with perceived failure of transitioning to OPENED state
 * due to intermittent zookeeper malfunctioning.
 * @see <a href="https://issues.apache.org/jira/browse/HBASE-9387">HBASE-9387</a>
 * @throws IOException
 * @throws NodeExistsException
 * @throws KeeperException
 */
@Test
public void testRegionServerAbortionDueToFailureTransitioningToOpened()
    throws IOException, NodeExistsException, KeeperException {
  final Server server = new MockServer(HTU);
  final RegionServerServices rss = HTU.createMockRegionServerService();

  HTableDescriptor htd = TEST_HTD;
  final HRegionInfo hri = TEST_HRI;
  HRegion region =
       HRegion.createHRegion(hri, HTU.getDataTestDir(), HTU
          .getConfiguration(), htd);
  assertNotNull(region);
  try {

    ZkCoordinatedStateManager csm = new ZkCoordinatedStateManager();
    csm.initialize(server);
    csm.start();

    ZkOpenRegionCoordination.ZkOpenRegionDetails zkCrd =
      new ZkOpenRegionCoordination.ZkOpenRegionDetails();
    zkCrd.setServerName(server.getServerName());

    ZkOpenRegionCoordination openRegionCoordination =
      new ZkOpenRegionCoordination(csm, server.getZooKeeper()) {
      @Override
      public boolean transitionToOpened(final HRegion r, OpenRegionDetails ord)
          throws IOException {
        // remove znode simulating intermittent zookeeper connection issue
        ZooKeeperWatcher zkw = server.getZooKeeper();
        String node = ZKAssign.getNodeName(zkw, hri.getEncodedName());
        try {
          ZKUtil.deleteNodeFailSilent(zkw, node);
        } catch (KeeperException e) {
          throw new RuntimeException("Ugh failed delete of " + node, e);
        }
        // then try to transition to OPENED
        return super.transitionToOpened(r, ord);
      }
    };

    OpenRegionHandler handler = new OpenRegionHandler(server, rss, hri, htd,
      -1, openRegionCoordination, zkCrd);
    rss.getRegionsInTransitionInRS().put(
      hri.getEncodedNameAsBytes(), Boolean.TRUE);
    // Call process without first creating OFFLINE region in zk, see if
    // exception or just quiet return (expected).
    handler.process();
    rss.getRegionsInTransitionInRS().put(
      hri.getEncodedNameAsBytes(), Boolean.TRUE);
    ZKAssign.createNodeOffline(server.getZooKeeper(), hri, server.getServerName());
    // Call process again but this time yank the zk znode out from under it
    // post OPENING; again will expect it to come back w/o NPE or exception.
    handler.process();
  } catch (IOException ioe) {
  } finally {
    HRegion.closeHRegion(region);
  }
  // Region server is expected to abort due to OpenRegionHandler perceiving transitioning
  // to OPENED as failed
  // This was corresponding to the second handler.process() call above.
  assertTrue("region server should have aborted", server.isAborted());
}
 

import org.apache.hadoop.hbase.coordination.ZkCoordinatedStateManager; //导入方法依赖的package包/类
@Before
public void before() throws ZooKeeperConnectionException, IOException {
  // TODO: Make generic versions of what we do below and put up in a mocking
  // utility class or move up into HBaseTestingUtility.

  // Mock a Server.  Have it return a legit Configuration and ZooKeeperWatcher.
  // If abort is called, be sure to fail the test (don't just swallow it
  // silently as is mockito default).
  this.server = Mockito.mock(Server.class);
  Mockito.when(server.getServerName()).thenReturn(ServerName.valueOf("master,1,1"));
  Mockito.when(server.getConfiguration()).thenReturn(HTU.getConfiguration());
  this.watcher =
    new ZooKeeperWatcher(HTU.getConfiguration(), "mockedServer", this.server, true);
  Mockito.when(server.getZooKeeper()).thenReturn(this.watcher);
  Mockito.doThrow(new RuntimeException("Aborted")).
    when(server).abort(Mockito.anyString(), (Throwable)Mockito.anyObject());

  cp = new ZkCoordinatedStateManager();
  cp.initialize(this.server);
  cp.start();

  mtl = Mockito.mock(MetaTableLocator.class);

  Mockito.when(server.getCoordinatedStateManager()).thenReturn(cp);
  Mockito.when(server.getMetaTableLocator()).thenReturn(mtl);

  // Get a connection w/ mocked up common methods.
  this.connection =
    (ClusterConnection)HConnectionTestingUtility.getMockedConnection(HTU.getConfiguration());

  // Make it so we can get a catalogtracker from servermanager.. .needed
  // down in guts of server shutdown handler.
  Mockito.when(server.getConnection()).thenReturn(connection);

  // Mock a ServerManager.  Say server SERVERNAME_{A,B} are online.  Also
  // make it so if close or open, we return 'success'.
  this.serverManager = Mockito.mock(ServerManager.class);
  Mockito.when(this.serverManager.isServerOnline(SERVERNAME_A)).thenReturn(true);
  Mockito.when(this.serverManager.isServerOnline(SERVERNAME_B)).thenReturn(true);
  Mockito.when(this.serverManager.getDeadServers()).thenReturn(new DeadServer());
  final Map<ServerName, ServerLoad> onlineServers = new HashMap<ServerName, ServerLoad>();
  onlineServers.put(SERVERNAME_B, ServerLoad.EMPTY_SERVERLOAD);
  onlineServers.put(SERVERNAME_A, ServerLoad.EMPTY_SERVERLOAD);
  Mockito.when(this.serverManager.getOnlineServersList()).thenReturn(
      new ArrayList<ServerName>(onlineServers.keySet()));
  Mockito.when(this.serverManager.getOnlineServers()).thenReturn(onlineServers);

  List<ServerName> avServers = new ArrayList<ServerName>();
  avServers.addAll(onlineServers.keySet());
  Mockito.when(this.serverManager.createDestinationServersList()).thenReturn(avServers);
  Mockito.when(this.serverManager.createDestinationServersList(null)).thenReturn(avServers);

  Mockito.when(this.serverManager.sendRegionClose(SERVERNAME_A, REGIONINFO, -1)).
    thenReturn(true);
  Mockito.when(this.serverManager.sendRegionClose(SERVERNAME_B, REGIONINFO, -1)).
    thenReturn(true);
  // Ditto on open.
  Mockito.when(this.serverManager.sendRegionOpen(SERVERNAME_A, REGIONINFO, -1, null)).
    thenReturn(RegionOpeningState.OPENED);
  Mockito.when(this.serverManager.sendRegionOpen(SERVERNAME_B, REGIONINFO, -1, null)).
    thenReturn(RegionOpeningState.OPENED);
  this.master = Mockito.mock(HMaster.class);

  Mockito.when(this.master.getServerManager()).thenReturn(serverManager);
}
 

import org.apache.hadoop.hbase.coordination.ZkCoordinatedStateManager; //导入方法依赖的package包/类
/**
 * Test the openregionhandler can deal with perceived failure of transitioning to OPENED state
 * due to intermittent zookeeper malfunctioning.
 * @see <a href="https://issues.apache.org/jira/browse/HBASE-9387">HBASE-9387</a>
 * @throws IOException
 * @throws NodeExistsException
 * @throws KeeperException
 */
@Test
public void testRegionServerAbortionDueToFailureTransitioningToOpened()
    throws IOException, NodeExistsException, KeeperException {
  final Server server = new MockServer(HTU);
  final RegionServerServices rss = HTU.createMockRegionServerService();

  HTableDescriptor htd = TEST_HTD;
  final HRegionInfo hri = TEST_HRI;
  HRegion region =
       HRegion.createHRegion(hri, HTU.getDataTestDir(), HTU
          .getConfiguration(), htd);
  assertNotNull(region);
  try {

    ZkCoordinatedStateManager csm = new ZkCoordinatedStateManager();
    csm.initialize(server);
    csm.start();

    ZkOpenRegionCoordination.ZkOpenRegionDetails zkCrd =
      new ZkOpenRegionCoordination.ZkOpenRegionDetails();
    zkCrd.setServerName(server.getServerName());

    ZkOpenRegionCoordination openRegionCoordination =
      new ZkOpenRegionCoordination(csm, server.getZooKeeper()) {
      @Override
      public boolean transitionToOpened(final HRegion r, OpenRegionDetails ord)
          throws IOException {
        // remove znode simulating intermittent zookeeper connection issue
        ZooKeeperWatcher zkw = server.getZooKeeper();
        String node = ZKAssign.getNodeName(zkw, hri.getEncodedName());
        try {
          ZKUtil.deleteNodeFailSilent(zkw, node);
        } catch (KeeperException e) {
          throw new RuntimeException("Ugh failed delete of " + node, e);
        }
        // then try to transition to OPENED
        return super.transitionToOpened(r, ord);
      }
    };

    OpenRegionHandler handler = new OpenRegionHandler(server, rss, hri, htd,
      openRegionCoordination, zkCrd);
    rss.getRegionsInTransitionInRS().put(
      hri.getEncodedNameAsBytes(), Boolean.TRUE);
    // Call process without first creating OFFLINE region in zk, see if
    // exception or just quiet return (expected).
    handler.process();
    rss.getRegionsInTransitionInRS().put(
      hri.getEncodedNameAsBytes(), Boolean.TRUE);
    ZKAssign.createNodeOffline(server.getZooKeeper(), hri, server.getServerName());
    // Call process again but this time yank the zk znode out from under it
    // post OPENING; again will expect it to come back w/o NPE or exception.
    handler.process();
  } catch (IOException ioe) {
  } finally {
    HRegion.closeHRegion(region);
  }
  // Region server is expected to abort due to OpenRegionHandler perceiving transitioning
  // to OPENED as failed
  // This was corresponding to the second handler.process() call above.
  assertTrue("region server should have aborted", server.isAborted());
}