@VisibleForTesting
  protected TaskInfo getTaskInfo(Object task) {
    return knownTasks.get(task);
  }
Updates relevant structures on the node, and fixes the position in the disabledNodeQueue
to facilitate the actual re-enablement of the node.
@param nodeInfo  the node to be re-enabled
llap-tez/src/java/org/apache/hadoop/hive/llap/tezplugins/LlapTaskSchedulerService.java