presto-main/src/main/java/io/prestosql/transaction/InMemoryTransactionManager.java/TransactionMetadata/safeAbort
class TransactionMetadata:        private static void safeAbort(ConnectorTransactionMetadata connection)
        {
            try {
                connection.abort();
            }
            catch (Exception e) {
                log.error(e, "Connector threw exception on abort");
            }
        }