@Override
  public synchronized void addEvents(TezTaskAttemptID taskAttemptID, Collection<TezEvent> events) {
    currentCallable.addEvents(taskAttemptID, events);
  }
Sends out final events for task failure.
@param taskAttemptID
@param isKilled
@param taskFailureType
@param t
@param diagnostics
@param srcMeta
@return
@throws IOException
          indicates an RPC communication failure.
@throws TezException
          indicates an exception somewhere in the AM.
llap-server/src/java/org/apache/hadoop/hive/llap/daemon/impl/LlapTaskReporter.java