@SuppressWarnings("unchecked") @Override public void handle(TaskAttemptEvent event) { Job job = context.getJob(event.getTaskAttemptID().getTaskId().getJobId()); Task task = job.getTask(event.getTaskAttemptID().getTaskId()); TaskAttempt attempt = task.getAttempt(event.getTaskAttemptID()); ((EventHandler<TaskAttemptEvent>) attempt).handle(event); }