import org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptCompletionEventStatus; //导入依赖的package包/类
private void handleTaskAttemptCompletion(TaskAttemptId attemptId,
    TaskAttemptCompletionEventStatus status) {
  TaskAttempt attempt = attempts.get(attemptId);
  //raise the completion event only if the container is assigned
  // to nextAttemptNumber
  if (attempt.getNodeHttpAddress() != null) {
    TaskAttemptCompletionEvent tce = recordFactory
        .newRecordInstance(TaskAttemptCompletionEvent.class);
    tce.setEventId(-1);
    String scheme = (encryptedShuffle) ? "https://" : "http://";
    tce.setMapOutputServerAddress(StringInterner.weakIntern(scheme
       + attempt.getNodeHttpAddress().split(":")[0] + ":"
       + attempt.getShufflePort()));
    tce.setStatus(status);
    tce.setAttemptId(attempt.getID());
    int runTime = 0;
    if (attempt.getFinishTime() != 0 && attempt.getLaunchTime() !=0)
      runTime = (int)(attempt.getFinishTime() - attempt.getLaunchTime());
    tce.setAttemptRunTime(runTime);
    
    //raise the event to job so that it adds the completion event to its
    //data structures
    eventHandler.handle(new JobTaskAttemptCompletedEvent(tce));
  }
}
 

import org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptCompletionEventStatus; //导入依赖的package包/类
@Override
public void transition(TaskImpl task, TaskEvent event) {
  TaskTAttemptEvent taskTAttemptEvent = (TaskTAttemptEvent) event;
  TaskAttemptId taskAttemptId = taskTAttemptEvent.getTaskAttemptID();
  task.handleTaskAttemptCompletion(
      taskAttemptId, 
      TaskAttemptCompletionEventStatus.SUCCEEDED);
  task.finishedAttempts.add(taskAttemptId);
  task.inProgressAttempts.remove(taskAttemptId);
  task.successfulAttempt = taskAttemptId;
  task.sendTaskSucceededEvents();
  for (TaskAttempt attempt : task.attempts.values()) {
    if (attempt.getID() != task.successfulAttempt &&
        // This is okay because it can only talk us out of sending a
        //  TA_KILL message to an attempt that doesn't need one for
        //  other reasons.
        !attempt.isFinished()) {
      LOG.info("Issuing kill to other attempt " + attempt.getID());
      task.eventHandler.handle(new TaskAttemptKillEvent(attempt.getID(),
          SPECULATION + task.successfulAttempt + " succeeded first!"));
    }
  }
  task.finished(TaskStateInternal.SUCCEEDED);
}
 

import org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptCompletionEventStatus; //导入依赖的package包/类
public static TaskCompletionEvent.Status fromYarn(
    TaskAttemptCompletionEventStatus newStatus) {
  switch (newStatus) {
  case FAILED:
    return TaskCompletionEvent.Status.FAILED;
  case KILLED:
    return TaskCompletionEvent.Status.KILLED;
  case OBSOLETE:
    return TaskCompletionEvent.Status.OBSOLETE;
  case SUCCEEDED:
    return TaskCompletionEvent.Status.SUCCEEDED;
  case TIPFAILED:
    return TaskCompletionEvent.Status.TIPFAILED;
  }
  throw new YarnRuntimeException("Unrecognized status: " + newStatus);
}
 

import org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptCompletionEventStatus; //导入依赖的package包/类
private static TaskAttemptCompletionEvent createTce(int eventId,
    boolean isMap, TaskAttemptCompletionEventStatus status) {
  JobId jid = MRBuilderUtils.newJobId(12345, 1, 1);
  TaskId tid = MRBuilderUtils.newTaskId(jid, 0,
      isMap ? org.apache.hadoop.mapreduce.v2.api.records.TaskType.MAP
          : org.apache.hadoop.mapreduce.v2.api.records.TaskType.REDUCE);
  TaskAttemptId attemptId = MRBuilderUtils.newTaskAttemptId(tid, 0);
  RecordFactory recordFactory =
    RecordFactoryProvider.getRecordFactory(null);
  TaskAttemptCompletionEvent tce = recordFactory
      .newRecordInstance(TaskAttemptCompletionEvent.class);
  tce.setEventId(eventId);
  tce.setAttemptId(attemptId);
  tce.setStatus(status);
  return tce;
}
 

import org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptCompletionEventStatus; //导入依赖的package包/类
@Override
public void transition(TaskImpl task, TaskEvent event) {
  TaskTAttemptEvent taskTAttemptEvent = (TaskTAttemptEvent) event;
  TaskAttemptId taskAttemptId = taskTAttemptEvent.getTaskAttemptID();
  task.handleTaskAttemptCompletion(
      taskAttemptId, 
      TaskAttemptCompletionEventStatus.SUCCEEDED);
  task.finishedAttempts.add(taskAttemptId);
  task.inProgressAttempts.remove(taskAttemptId);
  task.successfulAttempt = taskAttemptId;
  task.sendTaskSucceededEvents();
  for (TaskAttempt attempt : task.attempts.values()) {
    if (attempt.getID() != task.successfulAttempt &&
        // This is okay because it can only talk us out of sending a
        //  TA_KILL message to an attempt that doesn't need one for
        //  other reasons.
        !attempt.isFinished()) {
      LOG.info("Issuing kill to other attempt " + attempt.getID());
      task.eventHandler.handle(
          new TaskAttemptEvent(attempt.getID(), 
              TaskAttemptEventType.TA_KILL));
    }
  }
  task.finished(TaskStateInternal.SUCCEEDED);
}
 

import org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptCompletionEventStatus; //导入依赖的package包/类
@Override
public void transition(TaskImpl task, TaskEvent event) {
  TaskTAttemptEvent taskTAttemptEvent = (TaskTAttemptEvent) event;
  TaskAttemptId taskAttemptId = taskTAttemptEvent.getTaskAttemptID();
  task.handleTaskAttemptCompletion(
      taskAttemptId, 
      TaskAttemptCompletionEventStatus.SUCCEEDED);
  task.finishedAttempts.add(taskAttemptId);
  task.inProgressAttempts.remove(taskAttemptId);
  task.successfulAttempt = taskAttemptId;
  for (TaskAttempt attempt : task.attempts.values()) {
    if (attempt.getID() != task.successfulAttempt &&
        // This is okay because it can only talk us out of sending a
        //  TA_KILL message to an attempt that doesn't need one for
        //  other reasons.
        !attempt.isFinished()) {
      LOG.info("Issuing kill to other attempt " + attempt.getID());
      task.eventHandler.handle(new TaskAttemptKillEvent(attempt.getID(),
          SPECULATION + task.successfulAttempt + " succeeded first!"));
    }
  }
  task.finished(TaskStateInternal.SUCCEEDED);
  task.sendTaskSucceededEvents();
}