private QueryIdentifierProto constructQueryIdentifierProto(int dagIdentifier) {
    return QueryIdentifierProto.newBuilder()
        .setApplicationIdString(getContext().getCurrentAppIdentifier()).setDagIndex(dagIdentifier)
        .setAppAttemptNumber(getContext().getApplicationAttemptId().getAttemptId())
        .build();
  }
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