Hibernate version: 3.0


I have session-per-request in application and lazy-loading enabled... this error happens randomly when code tries to save/update a persistant object.. I doubt if its something due to concurrency b/c this happens for the object that we save into HTTP session accross request.

Anyones help will be appreciated.

Caused by: org.hibernate.HibernateException: Illegal attempt to associate a collection with two open sessions
at org.hibernate.collection.AbstractPersistentCollection.setCurrentSession(AbstractPersistentCollection.java:237)
at org.hibernate.event.def.OnUpdateVisitor.processCollection(OnUpdateVisitor.java:41)
at org.hibernate.event.def.AbstractVisitor.processValue(AbstractVisitor.java:104)
at org.hibernate.event.def.AbstractVisitor.processValue(AbstractVisitor.java:64)
at org.hibernate.event.def.AbstractVisitor.processEntityPropertyValues(AbstractVisitor.java:58)
at org.hibernate.event.def.AbstractVisitor.process(AbstractVisitor.java:129)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performUpdate(DefaultSaveOrUpdateEventListener.java:267)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsDetached(DefaultSaveOrUpdateEventListener.java:214)
at org.hibernate.event.def.DefaultUpdateEventListener.performSaveOrUpdate(DefaultUpdateEventListener.java:33)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:69)
at org.hibernate.impl.SessionImpl.update(SessionImpl.java:499)
at org.hibernate.impl.SessionImpl.update(SessionImpl.java:490)

Can you post how you are opening and closing the session and where you are storing your session

kkrikor

Its simple ... I am opening it in servlet filter and store it in ThreadLocal and closing it on the way back.

kkrikor... didn't hear back from you !!!

Anyone can please share their thoughts on this?

Ok here's another question for you ,

The hibernate Session do you put it in a thread local varaible , Are you doing that ?

Cause in my application i put the objects in the Http session too .

So let me know

and if you do the above mentioned , then check out this , you might be having concurrency problems

http://forum.hibernate.org/viewtopic.ph ... 6a4ece9adb