@Override
  public List<RuntimeStat> getRuntimeStats(int maxEntries, int maxCreateTime) throws MetaException {
    boolean committed = false;
    try {
      openTransaction();
      List<RuntimeStat> stats = getMRuntimeStats(maxEntries, maxCreateTime);
      committed = commitTransaction();
      return stats;
    } finally {
      rollbackAndCleanup(committed, null);
    }
  }
This is a cleanup method which is used to rollback a active transaction
if the success flag is false and close the associated Query object. This method is used
internally and visible for testing purposes only
@param success Rollback the current active transaction if false
@param query Query object which needs to be closed
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/ObjectStore.java