Hi, We are currently using drools 5.0.1 for processing business rules. But we are currently facing an issue where if we invoke the rule using 10 concurrent requests , thread gets locked . The error is as below . Deadlock/Blocked Monitor Owns Monitor Lock on org/drools/rule/JavaDialectRuntimeData$PackageClassLoader@0E99F9B8/0E99F9C4 Waiting for Monitor Lock on org/drools/rule/CompositeClassLoader@0DB50DC0/0DB50DCC Java Stack at java/lang/ClassLoader.loadClass(ClassLoader.java:606(Compiled Code)) at java/lang/Class.forNameImpl(Native Method) at java/lang/Class.forName(Class.java:163(Compiled Code)) at org/drools/rule/JavaDialectRuntimeData$PackageClassLoader.loadClass(JavaDialectRuntimeData.java:458(Compiled Code)) at java/lang/ClassLoader.loadClass(ClassLoader.java:606(Compiled Code)) at /Rule_AutoUW_Rule_BR12Constants_153_0ConsequenceInvoker.evaluate(Rule_AutoUW_Rule_BR12Constants_153_0ConsequenceInvoker.java:16) at org/drools/common/DefaultAgenda.fireActivation(DefaultAgenda.java:934(Compiled Code)) at org/drools/common/DefaultAgenda.fireNextItem(DefaultAgenda.java:885(Compiled Code)) at org/drools/common/DefaultAgenda.fireAllRules(DefaultAgenda.java:1086(Compiled Code)) at org/drools/common/AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:661(Compiled Code)) at org/drools/common/AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:637(Compiled Code)) at org/drools/reteoo/ReteooStatelessSession.execute(ReteooStatelessSession.java:203(Compiled Code)) Can you please advice .This has been occurring on Production systems and causing failures Thanks & Regards, Smita Deshpande Technical Specialist - DU UK Insurance Mastek Ltd | Cerebrum,2nd Floor, KalyaniNagar, Pune, Maharashtra, INDIA (M)(0)9823041314 | (T) 91 20 66072000 Extn - 2256 | VOIP: 729 | www.mastek.com Email:- smita.deshpande(a)mastek.com MASTEK LTD. In the US, we're called MAJESCOMASTEK ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Opinions expressed in this e-mail are those of the individual and not that of Mastek Limited, unless specifically indicated to that effect. Mastek Limited does not accept any responsibility or liability for it. This e-mail and attachments (if any) transmitted with it are confidential and/or privileged and solely for the use of the intended person or entity to which it is addressed. Any review, re-transmission, dissemination or other use of or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. This e-mail and its attachments have been scanned for the presence of computer viruses. It is the responsibility of the recipient to run the virus check on e-mails and attachments before opening them. If you have received this e-mail in error, kindly delete this e-mail from desktop and server. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users