@Override
    public String toString() {
      return JavaUtils.lockIdToString(lockId) + " queryId=" + queryId + " " + JavaUtils.txnIdToString(txnId);
    }
Used to make another attempt to acquire a lock (in Waiting state)
@param extLockId
@return result of the attempt
@throws LockException
ql/src/java/org/apache/hadoop/hive/ql/lockmgr/DbLockManager.java