[jboss-jira] [JBoss JIRA] (DROOLS-5198) Infinite loop induced by backward chaining

Infinite loop induced by backward chaining ------------------------------------------ Key: DROOLS-5198 URL: https://issues.redhat.com/browse/DROOLS-5198 Project: Drools Issue Type: Bug Components: core engine Affects Versions: 7.34.0.Final Reporter: Ivan Zilotti Assignee: Mario Fusco Priority: Major I could not find an out-of-the-box mechanism in Drools for stopping loops induced by backward chaining. I've found some research e.g., [Avoiding Infinite Loops in Rule-Based Systems with Backward Chaining|http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.38.8356...], indicating this is a recurring problem. When undeterred, these loops cause an OutOfMemoryError. I've already tried to: * Find configuration options in Drools to limit the behavior, but apparently there are't any; * Step through the code, trying to find ways to break the recursive behavior; * Change my rules to check for possible loops but that resulted either in partial facts being added to working memory (WM) or computationally expensive logic.