@Override
  public GetOpenTxnsResponse getOpenTxns(List<TxnType> excludeTxnTypes) throws MetaException {
    return jdbcResource.execute(new GetOpenTxnsListHandler(false, openTxnTimeOutMillis))
        .toOpenTxnsResponse(excludeTxnTypes);
  }
This is logically part of c'tor and must be called prior to any other method.
Not physically part of c'tor due to use of reflection
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/TxnHandler.java