I am using drools 5.3.1. I have a case where I need to recompile and update many knowledge packages within a single hibernate session. The problem I am facing is that with each subsequent select I do to get the next knowledge package, an extra update is done for every knowledge package updated so far. I dug into the code and think I found the issue. Hibernate returns a new knowledge package that it puts in its cache after updating. When hibernate later does a check to see if this object has changed since it was last saved it always thinks there was a change for the following reasons: 1.) The knowledge package does not reference the same object. 2.) The internal package is not the same reference (it does an identity check in the equals method of the KnowledgePackageImpl) 3.) The serialized bytes are compared and are for some reason different even though no changes were made to the knowledge package. Somehow it seems I need to get hibernate to know that the knowledge package did not change since the last update. Is there an easy way to do this? It seems like number 2 or 3 from above should work but fail for the reasons given. Otherwise the only workaround I can think of would be too load all knowledge packages that will need to be updated first, recompile them all, and then update them all at once. This is not the simplest thing to do with the way things currently work so it would be great if hibernate could handle this for me. Thanks. -- View this message in context: http://drools.46999.n3.nabble.com/Issue-serializing-KnowledgePackage-with... Sent from the Drools: User forum mailing list archive at Nabble.com.