Hello, sorry, I do not remember if/how I resolved the issue. I currently use a persisted stateful session (Drools 5.5) retracting the facts I insert with a rule with high salience and everything works fine. I did bump into an issue recently where a rule with a bad mvel expression (a variable in a regex matches that contained an invalid value) was causing an exception in the bowels of mvel/drools and keeping my rule from firing that retracts the objects I insert (so eventually I'd run out of memory). My point: make sure you test with a simple / value rule. hth. -J -- View this message in context: http://drools.46999.n3.nabble.com/Stateless-session-in-drools-server-keep... Sent from the Drools: User forum mailing list archive at Nabble.com.