Result: A running workflow that uses rules may fail to execute for several reasons. For example, if the Rules Listener is stopped when a workflow tries to run a rule, Process Engine (PE) will try to execute the rule again. PE will continue to retry to execute the rule until the Rules Listener is restarted. PE will also write an error to the Event Viewer (Windows) or system log (UNIX) each time it attempts to run a rule. Note that system performance will deteriorate as more and more workflows attempt to run the specified rules.
Result: If rules functionality is disabled in Process Configuration Console, any workflows that use rules will run without exception but will not execute the rules. See Installing, enabling, and starting the Rules Listener for information on enabling the Rules Listener integration.