[jboss-user] [JBoss Seam] - Re: JPA/Hibernate Entity: broken identity between Entity & O
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Sat Dec 1 22:13:43 EST 2007
While the entities are all within the same navigation and request, you may get different entities due to entity manager flushes when queries are run.
When you execute a query, it can flush the entity manager therefore invalidating the entity manager entity cache.
For example :
| MyClass a = entityManager.find(MyClass.class,id);
| MyList = entityManager.createQuery("...").getResultList();
| MyClass b = entityManager.find(MyClass.class,id);
Here, I believe 'a' and 'b' would be different objects representing the same entity with the same id because the query caused a flush which invalidated the cache and caused the entity manager to create and load a new instance of the entity.
What you could try, to diagnose the problem a bit is adding :
If one of them is a stale detached object, then the entity manager will complain.
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