@Override
    public int compareTo(Delayed o) {
      NodeInfo other = (NodeInfo) o;
      if (other.expireTimeMillis > this.expireTimeMillis) {
        return -1;
      } else if (other.expireTimeMillis < this.expireTimeMillis) {
        return 1;
      } else {
        return 0;
      }
    }
@return the time at which this node will be re-enabled
llap-tez/src/java/org/apache/hadoop/hive/llap/tezplugins/LlapTaskSchedulerService.java