RE: [rules-users] ClassCastException when firing rules

FYI: Spring AOP enhances objects via CGLIB when no interface is available. If an interface is avaiable, it uses an jdk dynamic proxy. -----Original Message----- From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of seemamani Sent: Wednesday, November 26, 2008 11:18 AM To: rules-users(a)lists.jboss.org Subject: Re: [rules-users] ClassCastException when firing rules Edson, We are not sure how the CGLIB proxy is getting created. We were under the impression that it is the shadow fact proxy generated by Drools itself. I would like to share a few more points about our application in case they are somehow related to this problem. 1. We are using Spring AOP for intercepting method calls and passing the facts, globals etc to a class that invoke Drools. Version of Spring is 2.0.7 2. We are using Hibernate 3.x/JPA for persistence. In fact the Inventory POJO that is causing the ClassCastException is a JPA entity 3. We have rules defined in multiple packages. The Inventory POJO is used by rules in all the packages. But the exception is occurring only for rules in a particular package. That too only occasionally. Please let me know if any other information is required. Thanks, Seema Edson Tirelli-3 wrote: > > What are you guys doing with CGLIB? or is this WebSphere doing some > sneaky thing behind the scenes? Or is it SpringAOP doing sneaky things? > > Caused by: > java.lang.ClassCastException: com.adesa.data.grounding.pojo.Inventory > incompatible with > com.adesa.data.grounding.pojo.Inventory$$EnhancerByCGLIB$$de81aab3 > > At compile time we determine that "inventory" is a > com.adesa.data.grounding.pojo.Inventory. If at runtime what arrives into > the > expression is a > com.adesa.data.grounding.pojo.Inventory$$EnhancerByCGLIB$$de81aab3, > and it is not a proper subclass, you might get such problems. > > Having said that, I will talk to Mike to check if this can be prevented > somehow, but I really don't know if it will be possible... > > []s > Edson > > > > 2008/11/25 seemamani <seemamani(a)gmail.com&gt; > >> >> hi, >> >> We are using Drools 4.0.7 in a web application deployed in WebSphere 6.1. >> Occasionally, we have rule engine failure caused by >> RuntimeDroolsException >> (whose root cause is shown as ClassCastException) when firing rules. >> Other >> times, the rules are executing without errors. Here is the stack trace of >> the exception. What are the possible reasons? >> >> Thanks, >> Seema >> >> org.drools.RuntimeDroolsException: Exception executing predicate eval( >> inventory.leaseInformation != null ) >> at >> org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:216 ) >> at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137) >> at >> >> org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(Composi teObjectSinkAdapter.java:318) >> at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:145) >> at >> >> org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(Composi teObjectSinkAdapter.java:318) >> at >> org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:162) >> at org.drools.reteoo.Rete.assertObject(Rete.java:175) >> at >> org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:192) >> at >> org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:71 ) >> at >> >> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java: 911) >> at >> >> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java: 883) >> at >> >> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java: 684) >> at >> >> com.adesa.business.framework.rules.process.drools.ManagedStatefulSession.i nit(ManagedStatefulSession.java:87) >> at >> >> com.adesa.business.framework.rules.process.drools.ManagedStatefulSession.f ireAllRules(ManagedStatefulSession.java:100) >> at >> >> com.adesa.business.framework.rules.process.drools.RuleEngineImpl.execute(R uleEngineImpl.java:60) >> at >> >> com.adesa.business.framework.rules.interceptor.RulesInterceptor.applyAnnot edRules(RulesInterceptor.java:109) >> at >> >> com.adesa.business.framework.rules.interceptor.RulesInterceptor.applyRules (RulesInterceptor.java:80) >> at sun.reflect.GeneratedMethodAccessor575.invoke(Unknown Source) >> at >> >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorIm pl.java:43) >> at java.lang.reflect.Method.invoke(Method.java:618) >> at >> > >> org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWi thGivenArgs(AbstractAspectJAdvice.java:597) >> at >> >> org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(A bstractAspectJAdvice.java:583) >> at >> >> org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAd vice.java:60) >> at >> >> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(Refle ctiveMethodInvocation.java:171) >> at >> >> org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(Exp oseInvocationInterceptor.java:89) >> at >> >> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(Refle ctiveMethodInvocation.java:171) >> at >> >> org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor .intercept(Cglib2AopProxy.java:629) >> at >> >> com.adesa.business.rules.RuleHandler$$EnhancerByCGLIB$$3ab6eda.fireUpdateP ricing(<generated>) >> at >> >> com.adesa.business.auction.manager.SaleEventManagerImpl.updatePricing(Sale EventManagerImpl.java:2599) >> at >> >> com.adesa.business.auction.manager.SaleEventManagerImpl.cascadeAtEndOfAuct ion(SaleEventManagerImpl.java:1993) >> at >> >> com.adesa.business.auction.manager.SaleEventManagerImpl.cascadeAtEndOfGrou ndingSaleEventForHyundai(SaleEventManagerImpl.java:1783) >> at >> >> com.adesa.business.auction.manager.SaleEventManagerImpl.cascadeAtEndOfGrou ndingSaleEvent(SaleEventManagerImpl.java:1180) >> at >> >> com.adesa.business.auction.manager.SaleEventManagerImpl.cascadeAtEndOfGrou ndingSaleEvent(SaleEventManagerImpl.java:1134) >> at >> >> com.adesa.business.auction.service.AuctionServiceImpl.cascadeAtEndOfGround ingSaleEvent(AuctionServiceImpl.java:766) >> at sun.reflect.GeneratedMethodAccessor263.invoke(Unknown Source) >> at >> >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorIm pl.java:43) >> at java.lang.reflect.Method.invoke(Method.java:618) >> at >> >> org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(Ao pUtils.java:304) >> at >> >> org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoi nt(ReflectiveMethodInvocation.java:182) >> at >> >> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(Refle ctiveMethodInvocation.java:149) >> at >> >> org.springframework.transaction.interceptor.TransactionInterceptor.invoke( TransactionInterceptor.java:106) >> at >> >> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(Refle ctiveMethodInvocation.java:171) >> at >> >> org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.procee d(MethodInvocationProceedingJoinPoint.java:77) >> at >> >> com.adesa.business.framework.logging.LoggingInterceptor.profileLog(Logging Interceptor.java:136) >> at sun.reflect.GeneratedMethodAccessor74.invoke(Unknown Source) >> at >> >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorIm pl.java:43) >> at java.lang.reflect.Method.invoke(Method.java:618) >> at >> >> org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWi thGivenArgs(AbstractAspectJAdvice.java:597) >> at >> >> org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(A bstractAspectJAdvice.java:583) >> at >> >> org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAd vice.java:60) >> at >> >> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(Refle ctiveMethodInvocation.java:171) >> at >> >> org.springframework.aop.framework.adapter.AfterReturningAdviceInterceptor. invoke(AfterReturningAdviceInterceptor.java:50) >> at >> >> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(Refle ctiveMethodInvocation.java:171) >> at >> >> org.springframework.aop.aspectj.AspectJAfterThrowingAdvice.invoke(AspectJA fterThrowingAdvice.java:54) >> at >> >> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(Refle ctiveMethodInvocation.java:171) >> at >> >> org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.in voke(MethodBeforeAdviceInterceptor.java:50) >> at >> >> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(Refle ctiveMethodInvocation.java:171) >> at >> >> org.springframework.aop.aspectj.AspectJAfterThrowingAdvice.invoke(AspectJA fterThrowingAdvice.java:54) >> at >> >> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(Refle ctiveMethodInvocation.java:171) >> at >> >> org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(Exp oseInvocationInterceptor.java:89) >> at >> >> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(Refle ctiveMethodInvocation.java:171) >> at >> >> org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopP roxy.java:204) >> at $Proxy58.cascadeAtEndOfGroundingSaleEvent(Unknown Source) >> at >> >> com.adesa.business.pricing.ejb.PricingBean.updateMBPPrice(PricingBean.java :112) >> at >> >> com.adesa.business.pricing.ejb.EJSRemoteStatelessPricing_a0966b04.updateMB PPrice(EJSRemoteStatelessPricing_a0966b04.java:183) >> at >> >> com.adesa.business.pricing.ejb._EJSRemoteStatelessPricing_a0966b04_Tie.upd ateMBPPrice(_EJSRemoteStatelessPricing_a0966b04_Tie.java:243) >> at >> >> com.adesa.business.pricing.ejb._EJSRemoteStatelessPricing_a0966b04_Tie._in voke(_EJSRemoteStatelessPricing_a0966b04_Tie.java:108) >> at >> >> com.ibm.CORBA.iiop.ServerDelegate.dispatchInvokeHandler(ServerDelegate.jav a:621) >> at >> com.ibm.CORBA.iiop.ServerDelegate.dispatch(ServerDelegate.java:474) >> at com.ibm.rmi.iiop.ORB.process(ORB.java:503) >> at com.ibm.CORBA.iiop.ORB.process(ORB.java:1571) >> at com.ibm.rmi.iiop.Connection.respondTo(Connection.java:2701) >> at com.ibm.rmi.iiop.Connection.doWork(Connection.java:2575) >> at com.ibm.rmi.iiop.WorkUnitImpl.doWork(WorkUnitImpl.java:62) >> at com.ibm.ejs.oa.pool.PooledThread.run(ThreadPool.java:118) >> at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1473) >> Caused by: >> java.lang.ClassCastException: com.adesa.data.grounding.pojo.Inventory >> incompatible with >> com.adesa.data.grounding.pojo.Inventory$$EnhancerByCGLIB$$de81aab3 >> at ASMAccessorImpl_11448003161226563261710.getValue(Unknown >> Source) >> at >> >> org.mvel.ast.VariableDeepPropertyNode.getReducedValueAccelerated(VariableD eepPropertyNode.java:22) >> at >> >> org.mvel.ast.PropertyASTNode.getReducedValueAccelerated(PropertyASTNode.ja va:21) >> at >> >> org.mvel.ast.BinaryOperation.getReducedValueAccelerated(BinaryOperation.ja va:21) >> at org.mvel.MVELRuntime.execute(MVELRuntime.java:90) >> at >> org.mvel.CompiledExpression.getValue(CompiledExpression.java:111) >> at org.mvel.MVEL.executeExpression(MVEL.java:235) >> at >> >> org.drools.base.mvel.MVELPredicateExpression.evaluate(MVELPredicateExpress ion.java:45) >> at >> org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:209 ) >> -- >> View this message in context: >> http://www.nabble.com/ClassCastException-when-firing-rules-tp20694738p2069 4738.html >> Sent from the drools - user mailing list archive at Nabble.com. >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> > > > > -- > Edson Tirelli > JBoss Drools Core Development > JBoss, a division of Red Hat @ www.jboss.com > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > -- View this message in context: http://www.nabble.com/Occasional-ClassCastException-when-firing-rules-tp20 694738p20705144.html Sent from the drools - user mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users