Hello,

After upgrading my application from 2.0 to 2.1.1, I'm getting a NullPointerException with some Session.delete(obj). The code supposedly ran fine before, therefore I started tracing 2.1.1 source code. After persevering for a long long time... I find that the NullPointerException originated in PersistentCollection :

static void identityRemove(Collection list, Object object, SessionImplementor session)
throws HibernateException {

if ( object!=null && session.isSaved(object) ) {

Serializable idOfCurrent = session.getEntityIdentifierIfNotUnsaved(object);
Iterator iter = list.iterator();
while ( iter.hasNext() ) {
Serializable idOfOld = session.getEntityIdentifierIfNotUnsaved( iter.next() );
if ( idOfCurrent.equals(idOfOld) ) {
iter.remove();
break;
}
}

}
}



in my case, idOfCurrent is null, and the code doesn't seem expect the case

Can anyone shed some light on this problem? Or has any similar problem been reported? Thanks.

Are you setting the id up front to null? This sounds very strange, please show your code.