Java Code Examples for org.apache.hadoop.util.ThreadUtil

The following examples show how to use org.apache.hadoop.util.ThreadUtil. These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source Project: circus-train   Source File: RetriableCommand.java    License: Apache License 2.0 6 votes vote down vote up
/**
 * The execute() method invokes doExecute() until either: 1. doExecute() succeeds, or 2. the command may no longer be
 * retried (e.g. runs out of retry-attempts).
 *
 * @param arguments The list of arguments for the command.
 * @return Generic "Object" from doExecute(), on success.
 * @throws IOException, IOException, on complete failure.
 */
public T execute(Object... arguments) throws Exception {
  Exception latestException;
  int counter = 0;
  while (true) {
    try {
      return doExecute(arguments);
    } catch (Exception exception) {
      LOG.error("Failure in Retriable command: {}", description, exception);
      latestException = exception;
    }
    counter++;
    RetryAction action = retryPolicy.shouldRetry(latestException, counter, 0, true);
    if (action.action == RetryPolicy.RetryAction.RetryDecision.RETRY) {
      ThreadUtil.sleepAtLeastIgnoreInterrupts(action.delayMillis);
    } else {
      break;
    }
  }

  throw new IOException("Couldn't run retriable-command: " + description, latestException);
}
 
Example 2
Source Project: hadoop   Source File: RetriableCommand.java    License: Apache License 2.0 6 votes vote down vote up
/**
 * The execute() method invokes doExecute() until either:
 *  1. doExecute() succeeds, or
 *  2. the command may no longer be retried (e.g. runs out of retry-attempts).
 * @param arguments The list of arguments for the command.
 * @return Generic "Object" from doExecute(), on success.
 * @throws Exception
 */
public Object execute(Object... arguments) throws Exception {
  Exception latestException;
  int counter = 0;
  while (true) {
    try {
      return doExecute(arguments);
    } catch(Exception exception) {
      LOG.error("Failure in Retriable command: " + description, exception);
      latestException = exception;
    }
    counter++;
    RetryAction action = retryPolicy.shouldRetry(latestException, counter, 0, true);
    if (action.action == RetryPolicy.RetryAction.RetryDecision.RETRY) {
      ThreadUtil.sleepAtLeastIgnoreInterrupts(action.delayMillis);
    } else {
      break;
    }
  }

  throw new IOException("Couldn't run retriable-command: " + description,
                        latestException);
}
 
Example 3
Source Project: big-c   Source File: RetriableCommand.java    License: Apache License 2.0 6 votes vote down vote up
/**
 * The execute() method invokes doExecute() until either:
 *  1. doExecute() succeeds, or
 *  2. the command may no longer be retried (e.g. runs out of retry-attempts).
 * @param arguments The list of arguments for the command.
 * @return Generic "Object" from doExecute(), on success.
 * @throws Exception
 */
public Object execute(Object... arguments) throws Exception {
  Exception latestException;
  int counter = 0;
  while (true) {
    try {
      return doExecute(arguments);
    } catch(Exception exception) {
      LOG.error("Failure in Retriable command: " + description, exception);
      latestException = exception;
    }
    counter++;
    RetryAction action = retryPolicy.shouldRetry(latestException, counter, 0, true);
    if (action.action == RetryPolicy.RetryAction.RetryDecision.RETRY) {
      ThreadUtil.sleepAtLeastIgnoreInterrupts(action.delayMillis);
    } else {
      break;
    }
  }

  throw new IOException("Couldn't run retriable-command: " + description,
                        latestException);
}
 
Example 4
Source Project: hadoop-ozone   Source File: VersionInfo.java    License: Apache License 2.0 5 votes vote down vote up
public VersionInfo(String component) {
  String versionInfoFile = component + "-version-info.properties";
  InputStream is = null;
  try {
    is = ThreadUtil.getResourceAsStream(
      getClass().getClassLoader(),
      versionInfoFile);
    info.load(is);
  } catch (IOException ex) {
    LoggerFactory.getLogger(getClass()).warn("Could not read '" +
        versionInfoFile + "', " + ex.toString(), ex);
  } finally {
    IOUtils.closeStream(is);
  }
}
 
Example 5
Source Project: hadoop-ozone   Source File: RetriableTask.java    License: Apache License 2.0 5 votes vote down vote up
@Override
public V call() throws Exception {
  int attempts = 0;
  Exception cause;
  while (true) {
    try {
      return task.call();
    } catch (Exception e) {
      cause = e;
      RetryPolicy.RetryAction action = retryPolicy.shouldRetry(e, ++attempts,
           0, true);
      if (action.action == RetryPolicy.RetryAction.RetryDecision.RETRY) {
        LOG.info("Execution of task {} failed, will be retried in {} ms",
            name, action.delayMillis);
        ThreadUtil.sleepAtLeastIgnoreInterrupts(action.delayMillis);
      } else {
        break;
      }
    }
  }

  String msg = String.format(
      "Execution of task %s failed permanently after %d attempts",
      name, attempts);
  LOG.warn(msg, cause);
  throw new IOException(msg, cause);
}
 
Example 6
Source Project: hadoop   Source File: TestModTime.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * Regression test for HDFS-3864 - NN does not update internal file mtime for
 * OP_CLOSE when reading from the edit log.
 */
@Test
public void testModTimePersistsAfterRestart() throws IOException {
  final long sleepTime = 10; // 10 milliseconds
  MiniDFSCluster cluster = null;
  FileSystem fs = null;
  Configuration conf = new HdfsConfiguration();
  try {
    cluster = new MiniDFSCluster.Builder(conf).build();
    fs = cluster.getFileSystem();
    Path testPath = new Path("/test");
    
    // Open a file, and get its initial modification time.
    OutputStream out = fs.create(testPath);
    long initialModTime = fs.getFileStatus(testPath).getModificationTime();
    assertTrue(initialModTime > 0);
    
    // Wait and then close the file. Ensure that the mod time goes up.
    ThreadUtil.sleepAtLeastIgnoreInterrupts(sleepTime);
    out.close();
    long modTimeAfterClose = fs.getFileStatus(testPath).getModificationTime();
    assertTrue(modTimeAfterClose >= initialModTime + sleepTime);
    
    // Restart the NN, and make sure that the later mod time is still used.
    cluster.restartNameNode();
    long modTimeAfterRestart = fs.getFileStatus(testPath).getModificationTime();
    assertEquals(modTimeAfterClose, modTimeAfterRestart);
  } finally {
    if (fs != null) {
      fs.close();
    }
    if (cluster != null) {
      cluster.shutdown();
    }
  }
}
 
Example 7
Source Project: hadoop   Source File: TestFailoverProxy.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * Ensure that when all configured services are throwing StandbyException
 * that we fail over back and forth between them until one is no longer
 * throwing StandbyException.
 */
@Test
public void testFailoverBetweenMultipleStandbys()
    throws UnreliableException, StandbyException, IOException {
  
  final long millisToSleep = 10000;
  
  final UnreliableImplementation impl1 = new UnreliableImplementation("impl1",
      TypeOfExceptionToFailWith.STANDBY_EXCEPTION);
  FlipFlopProxyProvider<UnreliableInterface> proxyProvider
      = new FlipFlopProxyProvider<UnreliableInterface>(
      UnreliableInterface.class,
      impl1,
      new UnreliableImplementation("impl2",
          TypeOfExceptionToFailWith.STANDBY_EXCEPTION));
  
  final UnreliableInterface unreliable = (UnreliableInterface)RetryProxy
    .create(UnreliableInterface.class, proxyProvider,
        RetryPolicies.failoverOnNetworkException(
            RetryPolicies.TRY_ONCE_THEN_FAIL, 10, 1000, 10000));
  
  new Thread() {
    @Override
    public void run() {
      ThreadUtil.sleepAtLeastIgnoreInterrupts(millisToSleep);
      impl1.setIdentifier("renamed-impl1");
    }
  }.start();
  
  String result = unreliable.failsIfIdentifierDoesntMatch("renamed-impl1");
  assertEquals("renamed-impl1", result);
}
 
Example 8
Source Project: big-c   Source File: TestModTime.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * Regression test for HDFS-3864 - NN does not update internal file mtime for
 * OP_CLOSE when reading from the edit log.
 */
@Test
public void testModTimePersistsAfterRestart() throws IOException {
  final long sleepTime = 10; // 10 milliseconds
  MiniDFSCluster cluster = null;
  FileSystem fs = null;
  Configuration conf = new HdfsConfiguration();
  try {
    cluster = new MiniDFSCluster.Builder(conf).build();
    fs = cluster.getFileSystem();
    Path testPath = new Path("/test");
    
    // Open a file, and get its initial modification time.
    OutputStream out = fs.create(testPath);
    long initialModTime = fs.getFileStatus(testPath).getModificationTime();
    assertTrue(initialModTime > 0);
    
    // Wait and then close the file. Ensure that the mod time goes up.
    ThreadUtil.sleepAtLeastIgnoreInterrupts(sleepTime);
    out.close();
    long modTimeAfterClose = fs.getFileStatus(testPath).getModificationTime();
    assertTrue(modTimeAfterClose >= initialModTime + sleepTime);
    
    // Restart the NN, and make sure that the later mod time is still used.
    cluster.restartNameNode();
    long modTimeAfterRestart = fs.getFileStatus(testPath).getModificationTime();
    assertEquals(modTimeAfterClose, modTimeAfterRestart);
  } finally {
    if (fs != null) {
      fs.close();
    }
    if (cluster != null) {
      cluster.shutdown();
    }
  }
}
 
Example 9
Source Project: big-c   Source File: TestFailoverProxy.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * Ensure that when all configured services are throwing StandbyException
 * that we fail over back and forth between them until one is no longer
 * throwing StandbyException.
 */
@Test
public void testFailoverBetweenMultipleStandbys()
    throws UnreliableException, StandbyException, IOException {
  
  final long millisToSleep = 10000;
  
  final UnreliableImplementation impl1 = new UnreliableImplementation("impl1",
      TypeOfExceptionToFailWith.STANDBY_EXCEPTION);
  FlipFlopProxyProvider<UnreliableInterface> proxyProvider
      = new FlipFlopProxyProvider<UnreliableInterface>(
      UnreliableInterface.class,
      impl1,
      new UnreliableImplementation("impl2",
          TypeOfExceptionToFailWith.STANDBY_EXCEPTION));
  
  final UnreliableInterface unreliable = (UnreliableInterface)RetryProxy
    .create(UnreliableInterface.class, proxyProvider,
        RetryPolicies.failoverOnNetworkException(
            RetryPolicies.TRY_ONCE_THEN_FAIL, 10, 1000, 10000));
  
  new Thread() {
    @Override
    public void run() {
      ThreadUtil.sleepAtLeastIgnoreInterrupts(millisToSleep);
      impl1.setIdentifier("renamed-impl1");
    }
  }.start();
  
  String result = unreliable.failsIfIdentifierDoesntMatch("renamed-impl1");
  assertEquals("renamed-impl1", result);
}
 
Example 10
Source Project: hadoop   Source File: TestDFSClientExcludedNodes.java    License: Apache License 2.0 4 votes vote down vote up
@Test(timeout=60000)
public void testExcludedNodesForgiveness() throws IOException {
  // Forgive nodes in under 2.5s for this test case.
  conf.setLong(
      DFSConfigKeys.DFS_CLIENT_WRITE_EXCLUDE_NODES_CACHE_EXPIRY_INTERVAL,
      2500);
  // We'll be using a 512 bytes block size just for tests
  // so making sure the checksum bytes too match it.
  conf.setInt("io.bytes.per.checksum", 512);
  cluster = new MiniDFSCluster.Builder(conf).numDataNodes(3).build();
  List<DataNodeProperties> props = cluster.dataNodes;
  FileSystem fs = cluster.getFileSystem();
  Path filePath = new Path("/testForgivingExcludedNodes");

  // 256 bytes data chunk for writes
  byte[] bytes = new byte[256];
  for (int index=0; index<bytes.length; index++) {
    bytes[index] = '0';
  }

  // File with a 512 bytes block size
  FSDataOutputStream out = fs.create(filePath, true, 4096, (short) 3, 512);

  // Write a block to all 3 DNs (2x256bytes).
  out.write(bytes);
  out.write(bytes);
  out.hflush();

  // Remove two DNs, to put them into the exclude list.
  DataNodeProperties two = cluster.stopDataNode(2);
  DataNodeProperties one = cluster.stopDataNode(1);

  // Write another block.
  // At this point, we have two nodes already in excluded list.
  out.write(bytes);
  out.write(bytes);
  out.hflush();

  // Bring back the older DNs, since they are gonna be forgiven only
  // afterwards of this previous block write.
  Assert.assertEquals(true, cluster.restartDataNode(one, true));
  Assert.assertEquals(true, cluster.restartDataNode(two, true));
  cluster.waitActive();

  // Sleep for 5s, to let the excluded nodes be expired
  // from the excludes list (i.e. forgiven after the configured wait period).
  // [Sleeping just in case the restart of the DNs completed < 5s cause
  // otherwise, we'll end up quickly excluding those again.]
  ThreadUtil.sleepAtLeastIgnoreInterrupts(5000);

  // Terminate the last good DN, to assert that there's no
  // single-DN-available scenario, caused by not forgiving the other
  // two by now.
  cluster.stopDataNode(0);

  try {
    // Attempt writing another block, which should still pass
    // cause the previous two should have been forgiven by now,
    // while the last good DN added to excludes this time.
    out.write(bytes);
    out.hflush();
    out.close();
  } catch (Exception e) {
    fail("Excluded DataNodes should be forgiven after a while and " +
         "not cause file writing exception of: '" + e.getMessage() + "'");
  }
}
 
Example 11
Source Project: hadoop   Source File: TestStandbyCheckpoints.java    License: Apache License 2.0 4 votes vote down vote up
/**
 * Make sure that clients will receive StandbyExceptions even when a
 * checkpoint is in progress on the SBN, and therefore the StandbyCheckpointer
 * thread will have FSNS lock. Regression test for HDFS-4591.
 */
@Test(timeout=300000)
public void testStandbyExceptionThrownDuringCheckpoint() throws Exception {
  
  // Set it up so that we know when the SBN checkpoint starts and ends.
  FSImage spyImage1 = NameNodeAdapter.spyOnFsImage(nn1);
  DelayAnswer answerer = new DelayAnswer(LOG);
  Mockito.doAnswer(answerer).when(spyImage1)
      .saveNamespace(Mockito.any(FSNamesystem.class),
          Mockito.eq(NameNodeFile.IMAGE), Mockito.any(Canceler.class));

  // Perform some edits and wait for a checkpoint to start on the SBN.
  doEdits(0, 1000);
  nn0.getRpcServer().rollEditLog();
  answerer.waitForCall();
  assertTrue("SBN is not performing checkpoint but it should be.",
      answerer.getFireCount() == 1 && answerer.getResultCount() == 0);
  
  // Make sure that the lock has actually been taken by the checkpointing
  // thread.
  ThreadUtil.sleepAtLeastIgnoreInterrupts(1000);
  try {
    // Perform an RPC to the SBN and make sure it throws a StandbyException.
    nn1.getRpcServer().getFileInfo("/");
    fail("Should have thrown StandbyException, but instead succeeded.");
  } catch (StandbyException se) {
    GenericTestUtils.assertExceptionContains("is not supported", se);
  }

  // Make sure new incremental block reports are processed during
  // checkpointing on the SBN.
  assertEquals(0, cluster.getNamesystem(1).getPendingDataNodeMessageCount());
  doCreate();
  Thread.sleep(1000);
  assertTrue(cluster.getNamesystem(1).getPendingDataNodeMessageCount() > 0);
  
  // Make sure that the checkpoint is still going on, implying that the client
  // RPC to the SBN happened during the checkpoint.
  assertTrue("SBN should have still been checkpointing.",
      answerer.getFireCount() == 1 && answerer.getResultCount() == 0);
  answerer.proceed();
  answerer.waitForResult();
  assertTrue("SBN should have finished checkpointing.",
      answerer.getFireCount() == 1 && answerer.getResultCount() == 1);
}
 
Example 12
Source Project: hadoop   Source File: TestStandbyCheckpoints.java    License: Apache License 2.0 4 votes vote down vote up
@Test(timeout=300000)
public void testReadsAllowedDuringCheckpoint() throws Exception {
  
  // Set it up so that we know when the SBN checkpoint starts and ends.
  FSImage spyImage1 = NameNodeAdapter.spyOnFsImage(nn1);
  DelayAnswer answerer = new DelayAnswer(LOG);
  Mockito.doAnswer(answerer).when(spyImage1)
      .saveNamespace(Mockito.any(FSNamesystem.class),
          Mockito.any(NameNodeFile.class),
          Mockito.any(Canceler.class));
  
  // Perform some edits and wait for a checkpoint to start on the SBN.
  doEdits(0, 1000);
  nn0.getRpcServer().rollEditLog();
  answerer.waitForCall();
  assertTrue("SBN is not performing checkpoint but it should be.",
      answerer.getFireCount() == 1 && answerer.getResultCount() == 0);
  
  // Make sure that the lock has actually been taken by the checkpointing
  // thread.
  ThreadUtil.sleepAtLeastIgnoreInterrupts(1000);
  
  // Perform an RPC that needs to take the write lock.
  Thread t = new Thread() {
    @Override
    public void run() {
      try {
        nn1.getRpcServer().restoreFailedStorage("false");
      } catch (IOException e) {
        e.printStackTrace();
      }
    }
  };
  t.start();
  
  // Make sure that our thread is waiting for the lock.
  ThreadUtil.sleepAtLeastIgnoreInterrupts(1000);
  
  assertFalse(nn1.getNamesystem().getFsLockForTests().hasQueuedThreads());
  assertFalse(nn1.getNamesystem().getFsLockForTests().isWriteLocked());
  assertTrue(nn1.getNamesystem().getCpLockForTests().hasQueuedThreads());
  
  // Get /jmx of the standby NN web UI, which will cause the FSNS read lock to
  // be taken.
  String pageContents = DFSTestUtil.urlGet(new URL("http://" +
      nn1.getHttpAddress().getHostName() + ":" +
      nn1.getHttpAddress().getPort() + "/jmx"));
  assertTrue(pageContents.contains("NumLiveDataNodes"));
  
  // Make sure that the checkpoint is still going on, implying that the client
  // RPC to the SBN happened during the checkpoint.
  assertTrue("SBN should have still been checkpointing.",
      answerer.getFireCount() == 1 && answerer.getResultCount() == 0);
  answerer.proceed();
  answerer.waitForResult();
  assertTrue("SBN should have finished checkpointing.",
      answerer.getFireCount() == 1 && answerer.getResultCount() == 1);
  
  t.join();
}
 
Example 13
Source Project: hadoop   Source File: TestPendingCorruptDnMessages.java    License: Apache License 2.0 4 votes vote down vote up
@Test
public void testChangedStorageId() throws IOException, URISyntaxException,
    InterruptedException {
  HdfsConfiguration conf = new HdfsConfiguration();
  conf.setInt(DFSConfigKeys.DFS_HA_TAILEDITS_PERIOD_KEY, 1);
  MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf)
      .numDataNodes(1)
      .nnTopology(MiniDFSNNTopology.simpleHATopology())
      .build();
  
  try {
    cluster.transitionToActive(0);
    
    FileSystem fs = HATestUtil.configureFailoverFs(cluster, conf);
    OutputStream out = fs.create(filePath);
    out.write("foo bar baz".getBytes());
    out.close();
    
    HATestUtil.waitForStandbyToCatchUp(cluster.getNameNode(0),
        cluster.getNameNode(1));
    
    // Change the gen stamp of the block on datanode to go back in time (gen
    // stamps start at 1000)
    ExtendedBlock block = DFSTestUtil.getFirstBlock(fs, filePath);
    assertTrue(cluster.changeGenStampOfBlock(0, block, 900));
    
    // Stop the DN so the replica with the changed gen stamp will be reported
    // when this DN starts up.
    DataNodeProperties dnProps = cluster.stopDataNode(0);
    
    // Restart the namenode so that when the DN comes up it will see an initial
    // block report.
    cluster.restartNameNode(1, false);
    assertTrue(cluster.restartDataNode(dnProps, true));
    
    // Wait until the standby NN queues up the corrupt block in the pending DN
    // message queue.
    while (cluster.getNamesystem(1).getBlockManager()
        .getPendingDataNodeMessageCount() < 1) {
      ThreadUtil.sleepAtLeastIgnoreInterrupts(1000);
    }
    
    assertEquals(1, cluster.getNamesystem(1).getBlockManager()
        .getPendingDataNodeMessageCount());
    String oldStorageId = getRegisteredDatanodeUid(cluster, 1);
    
    // Reformat/restart the DN.
    assertTrue(wipeAndRestartDn(cluster, 0));
    
    // Give the DN time to start up and register, which will cause the
    // DatanodeManager to dissociate the old storage ID from the DN xfer addr.
    String newStorageId = "";
    do {
      ThreadUtil.sleepAtLeastIgnoreInterrupts(1000);
      newStorageId = getRegisteredDatanodeUid(cluster, 1);
      System.out.println("====> oldStorageId: " + oldStorageId +
          " newStorageId: " + newStorageId);
    } while (newStorageId.equals(oldStorageId));
    
    assertEquals(0, cluster.getNamesystem(1).getBlockManager()
        .getPendingDataNodeMessageCount());
    
    // Now try to fail over.
    cluster.transitionToStandby(0);
    cluster.transitionToActive(1);
  } finally {
    cluster.shutdown();
  }
}
 
Example 14
Source Project: big-c   Source File: TestDFSClientExcludedNodes.java    License: Apache License 2.0 4 votes vote down vote up
@Test(timeout=60000)
public void testExcludedNodesForgiveness() throws IOException {
  // Forgive nodes in under 2.5s for this test case.
  conf.setLong(
      DFSConfigKeys.DFS_CLIENT_WRITE_EXCLUDE_NODES_CACHE_EXPIRY_INTERVAL,
      2500);
  // We'll be using a 512 bytes block size just for tests
  // so making sure the checksum bytes too match it.
  conf.setInt("io.bytes.per.checksum", 512);
  cluster = new MiniDFSCluster.Builder(conf).numDataNodes(3).build();
  List<DataNodeProperties> props = cluster.dataNodes;
  FileSystem fs = cluster.getFileSystem();
  Path filePath = new Path("/testForgivingExcludedNodes");

  // 256 bytes data chunk for writes
  byte[] bytes = new byte[256];
  for (int index=0; index<bytes.length; index++) {
    bytes[index] = '0';
  }

  // File with a 512 bytes block size
  FSDataOutputStream out = fs.create(filePath, true, 4096, (short) 3, 512);

  // Write a block to all 3 DNs (2x256bytes).
  out.write(bytes);
  out.write(bytes);
  out.hflush();

  // Remove two DNs, to put them into the exclude list.
  DataNodeProperties two = cluster.stopDataNode(2);
  DataNodeProperties one = cluster.stopDataNode(1);

  // Write another block.
  // At this point, we have two nodes already in excluded list.
  out.write(bytes);
  out.write(bytes);
  out.hflush();

  // Bring back the older DNs, since they are gonna be forgiven only
  // afterwards of this previous block write.
  Assert.assertEquals(true, cluster.restartDataNode(one, true));
  Assert.assertEquals(true, cluster.restartDataNode(two, true));
  cluster.waitActive();

  // Sleep for 5s, to let the excluded nodes be expired
  // from the excludes list (i.e. forgiven after the configured wait period).
  // [Sleeping just in case the restart of the DNs completed < 5s cause
  // otherwise, we'll end up quickly excluding those again.]
  ThreadUtil.sleepAtLeastIgnoreInterrupts(5000);

  // Terminate the last good DN, to assert that there's no
  // single-DN-available scenario, caused by not forgiving the other
  // two by now.
  cluster.stopDataNode(0);

  try {
    // Attempt writing another block, which should still pass
    // cause the previous two should have been forgiven by now,
    // while the last good DN added to excludes this time.
    out.write(bytes);
    out.hflush();
    out.close();
  } catch (Exception e) {
    fail("Excluded DataNodes should be forgiven after a while and " +
         "not cause file writing exception of: '" + e.getMessage() + "'");
  }
}
 
Example 15
Source Project: big-c   Source File: TestStandbyCheckpoints.java    License: Apache License 2.0 4 votes vote down vote up
/**
 * Make sure that clients will receive StandbyExceptions even when a
 * checkpoint is in progress on the SBN, and therefore the StandbyCheckpointer
 * thread will have FSNS lock. Regression test for HDFS-4591.
 */
@Test(timeout=300000)
public void testStandbyExceptionThrownDuringCheckpoint() throws Exception {
  
  // Set it up so that we know when the SBN checkpoint starts and ends.
  FSImage spyImage1 = NameNodeAdapter.spyOnFsImage(nn1);
  DelayAnswer answerer = new DelayAnswer(LOG);
  Mockito.doAnswer(answerer).when(spyImage1)
      .saveNamespace(Mockito.any(FSNamesystem.class),
          Mockito.eq(NameNodeFile.IMAGE), Mockito.any(Canceler.class));

  // Perform some edits and wait for a checkpoint to start on the SBN.
  doEdits(0, 1000);
  nn0.getRpcServer().rollEditLog();
  answerer.waitForCall();
  assertTrue("SBN is not performing checkpoint but it should be.",
      answerer.getFireCount() == 1 && answerer.getResultCount() == 0);
  
  // Make sure that the lock has actually been taken by the checkpointing
  // thread.
  ThreadUtil.sleepAtLeastIgnoreInterrupts(1000);
  try {
    // Perform an RPC to the SBN and make sure it throws a StandbyException.
    nn1.getRpcServer().getFileInfo("/");
    fail("Should have thrown StandbyException, but instead succeeded.");
  } catch (StandbyException se) {
    GenericTestUtils.assertExceptionContains("is not supported", se);
  }

  // Make sure new incremental block reports are processed during
  // checkpointing on the SBN.
  assertEquals(0, cluster.getNamesystem(1).getPendingDataNodeMessageCount());
  doCreate();
  Thread.sleep(1000);
  assertTrue(cluster.getNamesystem(1).getPendingDataNodeMessageCount() > 0);
  
  // Make sure that the checkpoint is still going on, implying that the client
  // RPC to the SBN happened during the checkpoint.
  assertTrue("SBN should have still been checkpointing.",
      answerer.getFireCount() == 1 && answerer.getResultCount() == 0);
  answerer.proceed();
  answerer.waitForResult();
  assertTrue("SBN should have finished checkpointing.",
      answerer.getFireCount() == 1 && answerer.getResultCount() == 1);
}
 
Example 16
Source Project: big-c   Source File: TestStandbyCheckpoints.java    License: Apache License 2.0 4 votes vote down vote up
@Test(timeout=300000)
public void testReadsAllowedDuringCheckpoint() throws Exception {
  
  // Set it up so that we know when the SBN checkpoint starts and ends.
  FSImage spyImage1 = NameNodeAdapter.spyOnFsImage(nn1);
  DelayAnswer answerer = new DelayAnswer(LOG);
  Mockito.doAnswer(answerer).when(spyImage1)
      .saveNamespace(Mockito.any(FSNamesystem.class),
          Mockito.any(NameNodeFile.class),
          Mockito.any(Canceler.class));
  
  // Perform some edits and wait for a checkpoint to start on the SBN.
  doEdits(0, 1000);
  nn0.getRpcServer().rollEditLog();
  answerer.waitForCall();
  assertTrue("SBN is not performing checkpoint but it should be.",
      answerer.getFireCount() == 1 && answerer.getResultCount() == 0);
  
  // Make sure that the lock has actually been taken by the checkpointing
  // thread.
  ThreadUtil.sleepAtLeastIgnoreInterrupts(1000);
  
  // Perform an RPC that needs to take the write lock.
  Thread t = new Thread() {
    @Override
    public void run() {
      try {
        nn1.getRpcServer().restoreFailedStorage("false");
      } catch (IOException e) {
        e.printStackTrace();
      }
    }
  };
  t.start();
  
  // Make sure that our thread is waiting for the lock.
  ThreadUtil.sleepAtLeastIgnoreInterrupts(1000);
  
  assertFalse(nn1.getNamesystem().getFsLockForTests().hasQueuedThreads());
  assertFalse(nn1.getNamesystem().getFsLockForTests().isWriteLocked());
  assertTrue(nn1.getNamesystem().getCpLockForTests().hasQueuedThreads());
  
  // Get /jmx of the standby NN web UI, which will cause the FSNS read lock to
  // be taken.
  String pageContents = DFSTestUtil.urlGet(new URL("http://" +
      nn1.getHttpAddress().getHostName() + ":" +
      nn1.getHttpAddress().getPort() + "/jmx"));
  assertTrue(pageContents.contains("NumLiveDataNodes"));
  
  // Make sure that the checkpoint is still going on, implying that the client
  // RPC to the SBN happened during the checkpoint.
  assertTrue("SBN should have still been checkpointing.",
      answerer.getFireCount() == 1 && answerer.getResultCount() == 0);
  answerer.proceed();
  answerer.waitForResult();
  assertTrue("SBN should have finished checkpointing.",
      answerer.getFireCount() == 1 && answerer.getResultCount() == 1);
  
  t.join();
}
 
Example 17
Source Project: big-c   Source File: TestPendingCorruptDnMessages.java    License: Apache License 2.0 4 votes vote down vote up
@Test
public void testChangedStorageId() throws IOException, URISyntaxException,
    InterruptedException {
  HdfsConfiguration conf = new HdfsConfiguration();
  conf.setInt(DFSConfigKeys.DFS_HA_TAILEDITS_PERIOD_KEY, 1);
  MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf)
      .numDataNodes(1)
      .nnTopology(MiniDFSNNTopology.simpleHATopology())
      .build();
  
  try {
    cluster.transitionToActive(0);
    
    FileSystem fs = HATestUtil.configureFailoverFs(cluster, conf);
    OutputStream out = fs.create(filePath);
    out.write("foo bar baz".getBytes());
    out.close();
    
    HATestUtil.waitForStandbyToCatchUp(cluster.getNameNode(0),
        cluster.getNameNode(1));
    
    // Change the gen stamp of the block on datanode to go back in time (gen
    // stamps start at 1000)
    ExtendedBlock block = DFSTestUtil.getFirstBlock(fs, filePath);
    assertTrue(cluster.changeGenStampOfBlock(0, block, 900));
    
    // Stop the DN so the replica with the changed gen stamp will be reported
    // when this DN starts up.
    DataNodeProperties dnProps = cluster.stopDataNode(0);
    
    // Restart the namenode so that when the DN comes up it will see an initial
    // block report.
    cluster.restartNameNode(1, false);
    assertTrue(cluster.restartDataNode(dnProps, true));
    
    // Wait until the standby NN queues up the corrupt block in the pending DN
    // message queue.
    while (cluster.getNamesystem(1).getBlockManager()
        .getPendingDataNodeMessageCount() < 1) {
      ThreadUtil.sleepAtLeastIgnoreInterrupts(1000);
    }
    
    assertEquals(1, cluster.getNamesystem(1).getBlockManager()
        .getPendingDataNodeMessageCount());
    String oldStorageId = getRegisteredDatanodeUid(cluster, 1);
    
    // Reformat/restart the DN.
    assertTrue(wipeAndRestartDn(cluster, 0));
    
    // Give the DN time to start up and register, which will cause the
    // DatanodeManager to dissociate the old storage ID from the DN xfer addr.
    String newStorageId = "";
    do {
      ThreadUtil.sleepAtLeastIgnoreInterrupts(1000);
      newStorageId = getRegisteredDatanodeUid(cluster, 1);
      System.out.println("====> oldStorageId: " + oldStorageId +
          " newStorageId: " + newStorageId);
    } while (newStorageId.equals(oldStorageId));
    
    assertEquals(0, cluster.getNamesystem(1).getBlockManager()
        .getPendingDataNodeMessageCount());
    
    // Now try to fail over.
    cluster.transitionToStandby(0);
    cluster.transitionToActive(1);
  } finally {
    cluster.shutdown();
  }
}