import org.apache.hadoop.mapreduce.jobhistory.TaskFailed; //导入依赖的package包/类
private void processTaskFailedEvent(TaskFailedEvent event) {
  ParsedTask task =
      getOrMakeTask(event.getTaskType(), event.getTaskId().toString(), false);
  if (task == null) {
    return;
  }
  task.setFinishTime(event.getFinishTime());
  task.setTaskStatus(getPre21Value(event.getTaskStatus()));
  TaskFailed t = (TaskFailed)(event.getDatum());
  task.putDiagnosticInfo(t.error.toString());
  task.putFailedDueToAttemptId(t.failedDueToAttempt.toString());
  org.apache.hadoop.mapreduce.jobhistory.JhCounters counters =
      ((TaskFailed) event.getDatum()).counters;
  task.incorporateCounters(
      counters == null ? EMPTY_COUNTERS : counters);
}