Exemplo n.º 1
0
 /**
  * Attempt to kill a running task. If the task has not started running, it will not start. If it's
  * already running, a kill request will be sent to it.
  *
  * <p>The AM will be informed about the task kill.
  */
 public void killTask() {
   if (!isCompleted.get()) {
     if (!killInvoked.getAndSet(true)) {
       synchronized (this) {
         LOG.info(
             "Kill task requested for id={}, taskRunnerSetup={}",
             taskSpec.getTaskAttemptID(),
             (taskRunner != null));
         if (taskRunner != null) {
           killtimerWatch.start();
           LOG.info("Issuing kill to task {}", taskSpec.getTaskAttemptID());
           boolean killed = taskRunner.killTask();
           if (killed) {
             // Sending a kill message to the AM right here. Don't need to wait for the task to
             // complete.
             LOG.info(
                 "Kill request for task {} completed. Informing AM", taskSpec.getTaskAttemptID());
             reportTaskKilled();
           } else {
             LOG.info(
                 "Kill request for task {} did not complete because the task is already complete",
                 taskSpec.getTaskAttemptID());
           }
           shouldRunTask = false;
         } else {
           // If the task hasn't started, and it is killed - report back to the AM that the task
           // has been killed.
           LOG.debug("Reporting taskKilled for non-started fragment {}", getRequestId());
           reportTaskKilled();
         }
         if (!isStarted.get()) {
           // If the task hasn't started - inform about fragment completion immediately. It's
           // possible for
           // the callable to never run.
           fragmentCompletionHanler.fragmentComplete(fragmentInfo);
           this.amReporter.unregisterTask(request.getAmHost(), request.getAmPort());
         }
       }
     } else {
       // This should not happen.
       LOG.warn(
           "Ignoring kill request for task {} since a previous kill request was processed",
           taskSpec.getTaskAttemptID());
     }
   } else {
     LOG.info(
         "Ignoring kill request for task {} since it's already complete",
         taskSpec.getTaskAttemptID());
   }
 }
Exemplo n.º 2
0
  @Override
  protected TaskRunner2Result callInternal() throws Exception {
    isStarted.set(true);

    this.startTime = System.currentTimeMillis();
    this.threadName = Thread.currentThread().getName();
    if (LOG.isDebugEnabled()) {
      LOG.debug("canFinish: " + taskSpec.getTaskAttemptID() + ": " + canFinish());
    }

    // Unregister from the AMReporter, since the task is now running.
    this.amReporter.unregisterTask(request.getAmHost(), request.getAmPort());

    synchronized (this) {
      if (!shouldRunTask) {
        LOG.info("Not starting task {} since it was killed earlier", taskSpec.getTaskAttemptID());
        return new TaskRunner2Result(EndReason.KILL_REQUESTED, null, false);
      }
    }

    // TODO This executor seems unnecessary. Here and TezChild
    ExecutorService executorReal =
        Executors.newFixedThreadPool(
            1, new ThreadFactoryBuilder().setDaemon(true).setNameFormat("TezTaskRunner").build());
    executor = MoreExecutors.listeningDecorator(executorReal);

    // TODO Consolidate this code with TezChild.
    runtimeWatch.start();
    UserGroupInformation taskUgi = UserGroupInformation.createRemoteUser(request.getUser());
    taskUgi.addCredentials(credentials);

    Map<String, ByteBuffer> serviceConsumerMetadata = new HashMap<>();
    serviceConsumerMetadata.put(
        TezConstants.TEZ_SHUFFLE_HANDLER_SERVICE_ID,
        TezCommonUtils.convertJobTokenToBytes(jobToken));
    Multimap<String, String> startedInputsMap = createStartedInputMap(request.getFragmentSpec());

    UserGroupInformation taskOwner =
        UserGroupInformation.createRemoteUser(request.getTokenIdentifier());
    final InetSocketAddress address =
        NetUtils.createSocketAddrForHost(request.getAmHost(), request.getAmPort());
    SecurityUtil.setTokenService(jobToken, address);
    taskOwner.addToken(jobToken);
    umbilical =
        taskOwner.doAs(
            new PrivilegedExceptionAction<LlapTaskUmbilicalProtocol>() {
              @Override
              public LlapTaskUmbilicalProtocol run() throws Exception {
                return RPC.getProxy(
                    LlapTaskUmbilicalProtocol.class,
                    LlapTaskUmbilicalProtocol.versionID,
                    address,
                    conf);
              }
            });

    taskReporter =
        new LlapTaskReporter(
            umbilical,
            confParams.amHeartbeatIntervalMsMax,
            confParams.amCounterHeartbeatInterval,
            confParams.amMaxEventsPerHeartbeat,
            new AtomicLong(0),
            request.getContainerIdString());

    String attemptId = fragmentInfo.getFragmentIdentifierString();
    IOContextMap.setThreadAttemptId(attemptId);
    try {
      synchronized (this) {
        if (shouldRunTask) {
          taskRunner =
              new TezTaskRunner2(
                  conf,
                  taskUgi,
                  fragmentInfo.getLocalDirs(),
                  taskSpec,
                  request.getAppAttemptNumber(),
                  serviceConsumerMetadata,
                  envMap,
                  startedInputsMap,
                  taskReporter,
                  executor,
                  objectRegistry,
                  pid,
                  executionContext,
                  memoryAvailable,
                  false);
        }
      }
      if (taskRunner == null) {
        LOG.info("Not starting task {} since it was killed earlier", taskSpec.getTaskAttemptID());
        return new TaskRunner2Result(EndReason.KILL_REQUESTED, null, false);
      }

      try {
        TaskRunner2Result result = taskRunner.run();
        if (result.isContainerShutdownRequested()) {
          LOG.warn("Unexpected container shutdown requested while running task. Ignoring");
        }
        isCompleted.set(true);
        return result;
      } finally {
        FileSystem.closeAllForUGI(taskUgi);
        LOG.info(
            "ExecutionTime for Container: "
                + request.getContainerIdString()
                + "="
                + runtimeWatch.stop().elapsedMillis());
        if (LOG.isDebugEnabled()) {
          LOG.debug(
              "canFinish post completion: " + taskSpec.getTaskAttemptID() + ": " + canFinish());
        }
      }
    } finally {
      IOContextMap.clearThreadAttempt(attemptId);
    }
  }