Hibernate version:3

Name and version of the database you are using:oracle9



Hi,

I've got a problem, I get this exception :

org.springframework.orm.hibernate3.HibernateSystemException: a different object with the same identifier value was already associated with the session.

I've been reading up on this problem and have found a lot of discussions but no answer to my problem.

I think the exception has something to do with the implmenattion of equals and hashcode. Can someone explain to me (or link me) how it works.

Thanks

Hey,

are your using detached objects within your application? If you have a detached instance0 of Class Foo and you fetch the same instance in a new session, say instance1 and you put your instance0 back into the session using a session.update(instance0) / session.merge(instance0) you will end up with this kind of Exception.
There can't be more than one instance in a session representing the same single row (entity)

hope that helps...

simon