BiMap<ContainerId, TezTaskAttemptID> getContainerAttemptMapForNode(LlapNodeId llapNodeId) {
      return nodeMap.get(llapNodeId);
    }
Return a {@link BiMap} containing container->taskAttemptId mapping for the host specified.
</p>
<p/>
This method return the internal structure used by the EntityTracker. Users must synchronize
on the structure to ensure correct usage.

@param llapNodeId
@return
llap-tez/src/java/org/apache/hadoop/hive/llap/tezplugins/LlapTaskCommunicator.java