loading an object in one transaction and mergin in another.

websheriff · **Joined:** Thu Sep 22, 2005 7:22 am **Posts:** 21

Hibernate version: 3.1

Code:

startTransaction();
MyClass a = session.load(MyClass.class, 1);
endTransaction();

alterMyObject(a);

startTransaction();
session.merge(a); <----- exception!
endTransaction();

why do I get

Code:

org.hibernate.PersistentObjectException: detached entity passed to persist: MyObject

??

if I try to session.lock(a, LockMode.NONE) before session.merge(a) I get a

Code:

org.hibernate.HibernateException: Illegal attempt to associate a collection with two open sessions

please help!