Error instruction select sql Spring

i have this sqlDynamic instruction:

select code from service,service_has_rule where service.id=service_has_rule.service_id and service_has_rule.rule_id in 
    (3,4) ORDER BY priority DESC

if i try with this code, all work:

strLst = jdbcTemplateObject.queryForList(sqlDynamic, String.class);
return strLst;

But if i try with:

DefaultTransactionDefinition defaultTransactionDefinition = new DefaultTransactionDefinition();

        TransactionStatus status = transactionManager
                .getTransaction(defaultTransactionDefinition);

        try {
            strLst = jdbcTemplateObject.queryForList(sqlDynamic, String.class);
            transactionManager.commit(status);

        } catch (DataAccessException e) {
            logger.info(TAG_LOG + " "
                    + "Error in creating record, rolling back");
            transactionManager.rollback(status);
            throw e;
        }
        return strLst;

not work..but i'm not understad why...