Hi, I am using Drools 5.1.1 and Spring-Drools configuration to load excels on startup and inject stateful session into Java service. I noticed org.drools.reteoo.ReteooRuleBase not getting released when I redeploy the app. Other suspect that I notoced is org.drools.rule.builder.dialect.java.parser.JavaLexer. After redeploy (stop, uninstall and install) previous deploy ReteooRuleBase is still out there along with new instance. Is there a known memory leak in 5.1.1 or do I need to cofigure Spring differently ? I am attaching config code below. Env: Drools 5.1.1 WAS 6.1 JDK 5 <drools:kbase id="kbase1"> <drools:resources> <drools:resource type="DTABLE" source="file:/Rules/ruleset1.xls"> <drools:decisiontable-conf input-type='XLS' worksheet-name="Sheet1"/> </drools:resource> <drools:resource type="DTABLE" source="file:/Rules/ruleset2.xls"> <drools:decisiontable-conf input-type='XLS' worksheet-name="Sheet1"/> </drools:resource> </drools:resources> <drools:configuration> <drools:mbeans enabled="true" /> <drools:event-processing-mode mode="STREAM" /> </drools:configuration> </drools:kbase> <drools:ksession kbase="kbase1" type="stateful" id="ksession1"/> <bean id="rulesService" class = "com.RulesServiceImpl"> <constructor-arg ref="ksession1"/> </bean> -- View this message in context: http://drools.46999.n3.nabble.com/org-drools-reteoo-ReteooRuleBase-not-ge... Sent from the Drools: User forum mailing list archive at Nabble.com.