@Override
    public String toString() {
      return "NodeBlacklistConf{" +
          "minDelay=" + minDelay +
          ", maxDelay=" + maxDelay +
          ", backoffFactor=" + backoffFactor +
          '}';
    }
Whether there's an update in progress for this TaskInfo.
llap-tez/src/java/org/apache/hadoop/hive/llap/tezplugins/LlapTaskSchedulerService.java