Hibernate version: 2.1.2

While using a for loop to iterator over a collection returned from a Hibernate object, I am getting a ConcurrentModificationException. I am not adding or removing things from this collection, just iterating over it.

I know that's not a lot of info, but there's not a lot here. Any ideas on what to be looking for? Hibernate should have alread loaded the collection before passing it back right?

Thanks,
Patrick

Is it possible another thread is modifying your collection? What are you doing in the for loop? It might be possible you are violating the contract in some other way in which case it will fail-fast.

If its not too much trouble, try posting some code.

Isn't there an evict(Object) or evictCollection(...) method? Or try to clone() the collection before iterating it.

how are you managing your session?
in your problem, 2 thread may hit the same session... the session isn't threadsafe...

I am just iterating over the collection as returned. This is the only active thread. And unless hibernate is filling the collection in its own internal thread, then I don't know what is causing the concurrent access.

I'm going to dig further into the code. The DAO class was written by another team member.

Thanks,
Patrick

Yep, the DAO I am using to get objects out was modifying the Set. Gotta change that.

Thanks for all the responses.

Patrick