Hi all, I've run into a memory issue when using Drools, and I was hoping someone could help out. I have a project that uses StatefulKnowledgeSession's, and every couple of weeks I get OutOfMemory from the JVM. I've done heap dumps and analyzed the dominator_tree, etc. No luck yet in identifying the culprit. However, I did notice that I have hundreds of the following threads (shown below) for .ResourceChangeNotifierImpl$ProcessChangeSet and ResourceChangeScannerImpl$ProcessChangeSet. The thread count increases every time a new session is created (and maybe every time a rule is evaluated??). This seems kind of odd to me. I'm using drool-spring to instantiate the kbase, kagent, and resource-change-scanner. My spring configuration is as follows, using v1.5 of the xsd under Drools 5.4.0.Final and jBPM 5.3.0.Final: Thank you for any ideas. -- View this message in context: http://drools.46999.n3.nabble.com/ResourceChangeScanner-and-ResourceChang... Sent from the Drools: User forum mailing list archive at Nabble.com.