Hi,

I wonder how it is possible to get a



When I have an attached object that I first serialize to XML, then encrypt, then post to a servlet and there the reverse operations are done?

The recieving servlet (under a different context root) then tries to clear the keys on the object hierarchy and insert it into a different DB using Hibernate.

The posting is done using Jakarta HttpClient so there should really be no connection between the two Hibernate sessions(?)

It looks like your XML serialization is pretty accurate :) so it delivered H collection proxy across that keeps association to the old session, invalid by now of course.
You may need to go through your object and replace H implementations of collection interfaces with standard java ones before sending. For example: o.setList( new ArrayList( o.getList() ) );

Indeed - that did the trick! I should have examined the incoming data instead of just assuming that it was the same as I tought I had constructed :-/