This is possibly directly related to: (or rather that one relates to this one)

https://issues.jboss.org/browse/DROOLS-1093

The situation:

• Create a session with 2 rules. 1 Rule expires facts that are in the working memory by retracting them.
• Add the ExpiryFact to expire some facts
• Execute all rules -> X facts get expired
• dispose the existing session
• re-load the session
• without adding more facts to the working memory, run all rules
• The session re-executes more rules and retracts things from memory

Now there seem to be 2 problems with this:
1. The session does not remember what facts it expired. So it will delete more infos, that are still "somewhere". When re-loading the session from the database, we will see an NPE
2. Surely since it already ran the rules against the Expiry fact, it should not run them again.

I will attach a unit test ExceptionTest#testRulesAreFiredTwice with this bug.

Let me know if this can be worked around please and/or if there are any more questions.

Thanks,
Artur