You are most likely going into an infinite loop. Drools happened to pick that activation first every time and never came out of the loop. If you see the audit view below, notice that there are 3 activations and only 1 keeps firing an is in a loop and the other 2 didnt get a chance to fire. But, there are activations. <http://drools.46999.n3.nabble.com/file/n4022793/audit.jpg> -- View this message in context: http://drools.46999.n3.nabble.com/Confused-by-Simple-Self-Loop-Problem-tp... Sent from the Drools: User forum mailing list archive at Nabble.com.