Spring Framework marks transaction to rollback when everything is fine

Eventually, you can’t conclude the whole process flux because, at the end, the Spring Framework marks the transaction to rollback, even when all exceptions were caught.

The evidence of this scenario is this following message Transaction was marked for rollback only; cannot commit. The exception thrown is org.springframework.orm.jpa.JpaSystemException.

It happens because in some point of all code processed, your flow had an exception unchecked. The simplest solution is to use checked exceptions and avoid use NoResultException unless it is really necessary.