Hibernate version:
3.1

Code between sessionFactory.openSession() and session.close():
I insert an Object with saveOrUpdate because i need the generated Id.
then (in some cases) I need to delete the Object. Everything in the same Session and Thread.

HibernateUtil.beginTransaction();
makePersistent(myObject);
makeTransient(myObject);
HibernateUtil.commitTransaction();

Name and version of the database you are using:
MYSQL 4.1

The generated SQL (show_sql=true):
The only SQL Code is the insert statement

Debug level Hibernate log excerpt:

Best regards and thanks for suggestions

can u breif a little more on it

Shure,
its very simple:
I upload a File and insert it into my database (the filename).
I do this to name the uploaded file after the id of the inserted object.

Then i do certain checks like file size and file type.
If the uploaded doesnt pass my checks i have to delete the database entry.

Everything works except of the deletion of the object.

I solved the problem. I forgot the Filtermapping, just had the Filter in my web.xml.