I have two pojos, both of them have a collection bids.
What I want is to remove an element from this collection so I am using the following code:

Session session = HibernateUtil.getCurrentSession();
Thing thing = session.load(Thing.class, thingId);
Item item= session.load(Item.class, itemId);

thing.getBids().remove(bid);
item.getBids().remove(bid);

session.save(thing);
session.save(item);

session.close();


In my mapping files (Item.hbm.xml, Thing.hbm.xml) I have in the set
tag of the collections bids the property cascade="all-delete-orphan".

The above code works however if I try to delete 20-25 bids I get the following exception:

StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect)

Any suggestions?

Hi juana,

Stale Object Exception is means that what ever reference of object you have is not the current state of DB .There is version difference. Stale object is expected Because of optimistic concurrency control by version. In your case if its works fine but some time it gets problem .Is this is your problem the either it is problem with multithreading (if u used) or while you are executing your code some body had updated that record. Means Dirty read problem .