Hibernate first level cache - does it Sync?

Question

I am aware of the fact that Session is first level

Answer 1

You'll need to call Session.evict(Object) on s1 with u1 as an argument in order to get a fresh lookup. Alternatively, for this case, you could also call Session.clear() on s1 as well to get the same effect. You could also call Session.refresh(Object object) to just refresh the state of u1 as well.

Note that transactions can take an undefined amount of time (usually not very long though) to be seen by other clients after they are committed. The update may not be visible immediately to other sessions using different connections.