protected void sendUpdateMessageAsync(TaskInfo ti, boolean newState) {
    WM_LOG.info("Sending message to " + ti.attemptId + ": " + newState);
    communicator.startUpdateGuaranteed(ti.attemptId, ti.assignedNode, newState, UPDATE_CALLBACK, ti);
  }
Whether there's an update in progress for this TaskInfo.
llap-tez/src/java/org/apache/hadoop/hive/llap/tezplugins/LlapTaskSchedulerService.java