[rules-users] ClassCastException when firing rules
seemamani
seemamani at gmail.com
Wed Nov 26 12:18:09 EST 2008
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 at gmail.com>
>
>>
>> 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(CompositeObjectSinkAdapter.java:318)
>> at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:145)
>> at
>>
>> org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.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.init(ManagedStatefulSession.java:87)
>> at
>>
>> com.adesa.business.framework.rules.process.drools.ManagedStatefulSession.fireAllRules(ManagedStatefulSession.java:100)
>> at
>>
>> com.adesa.business.framework.rules.process.drools.RuleEngineImpl.execute(RuleEngineImpl.java:60)
>> at
>>
>> com.adesa.business.framework.rules.interceptor.RulesInterceptor.applyAnnotedRules(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(DelegatingMethodAccessorImpl.java:43)
>> at java.lang.reflect.Method.invoke(Method.java:618)
>> at
>>
>
>> org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:597)
>> at
>>
>> org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:583)
>> at
>>
>> org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:60)
>> at
>>
>> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
>> at
>>
>> org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
>> at
>>
>> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
>> at
>>
>> org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:629)
>> at
>>
>> com.adesa.business.rules.RuleHandler$$EnhancerByCGLIB$$3ab6eda.fireUpdatePricing(<generated>)
>> at
>>
>> com.adesa.business.auction.manager.SaleEventManagerImpl.updatePricing(SaleEventManagerImpl.java:2599)
>> at
>>
>> com.adesa.business.auction.manager.SaleEventManagerImpl.cascadeAtEndOfAuction(SaleEventManagerImpl.java:1993)
>> at
>>
>> com.adesa.business.auction.manager.SaleEventManagerImpl.cascadeAtEndOfGroundingSaleEventForHyundai(SaleEventManagerImpl.java:1783)
>> at
>>
>> com.adesa.business.auction.manager.SaleEventManagerImpl.cascadeAtEndOfGroundingSaleEvent(SaleEventManagerImpl.java:1180)
>> at
>>
>> com.adesa.business.auction.manager.SaleEventManagerImpl.cascadeAtEndOfGroundingSaleEvent(SaleEventManagerImpl.java:1134)
>> at
>>
>> com.adesa.business.auction.service.AuctionServiceImpl.cascadeAtEndOfGroundingSaleEvent(AuctionServiceImpl.java:766)
>> at sun.reflect.GeneratedMethodAccessor263.invoke(Unknown Source)
>> at
>>
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>> at java.lang.reflect.Method.invoke(Method.java:618)
>> at
>>
>> org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:304)
>> at
>>
>> org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
>> at
>>
>> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
>> at
>>
>> org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
>> at
>>
>> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
>> at
>>
>> org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:77)
>> at
>>
>> com.adesa.business.framework.logging.LoggingInterceptor.profileLog(LoggingInterceptor.java:136)
>> at sun.reflect.GeneratedMethodAccessor74.invoke(Unknown Source)
>> at
>>
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>> at java.lang.reflect.Method.invoke(Method.java:618)
>> at
>>
>> org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:597)
>> at
>>
>> org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:583)
>> at
>>
>> org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:60)
>> at
>>
>> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
>> at
>>
>> org.springframework.aop.framework.adapter.AfterReturningAdviceInterceptor.invoke(AfterReturningAdviceInterceptor.java:50)
>> at
>>
>> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
>> at
>>
>> org.springframework.aop.aspectj.AspectJAfterThrowingAdvice.invoke(AspectJAfterThrowingAdvice.java:54)
>> at
>>
>> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
>> at
>>
>> org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:50)
>> at
>>
>> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
>> at
>>
>> org.springframework.aop.aspectj.AspectJAfterThrowingAdvice.invoke(AspectJAfterThrowingAdvice.java:54)
>> at
>>
>> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
>> at
>>
>> org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
>> at
>>
>> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
>> at
>>
>> org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
>> at $Proxy58.cascadeAtEndOfGroundingSaleEvent(Unknown Source)
>> at
>>
>> com.adesa.business.pricing.ejb.PricingBean.updateMBPPrice(PricingBean.java:112)
>> at
>>
>> com.adesa.business.pricing.ejb.EJSRemoteStatelessPricing_a0966b04.updateMBPPrice(EJSRemoteStatelessPricing_a0966b04.java:183)
>> at
>>
>> com.adesa.business.pricing.ejb._EJSRemoteStatelessPricing_a0966b04_Tie.updateMBPPrice(_EJSRemoteStatelessPricing_a0966b04_Tie.java:243)
>> at
>>
>> com.adesa.business.pricing.ejb._EJSRemoteStatelessPricing_a0966b04_Tie._invoke(_EJSRemoteStatelessPricing_a0966b04_Tie.java:108)
>> at
>>
>> com.ibm.CORBA.iiop.ServerDelegate.dispatchInvokeHandler(ServerDelegate.java:621)
>> at
>> com.ibm.CORBA.iiop.ServerDelegate.dispatch(ServerDelegate.java:474)
>> at com.ibm.rmi.iiop.ORB.process(ORB.java:503)
>> at com.ibm.CORBA.iiop.ORB.process(ORB.java:1571)
>> at com.ibm.rmi.iiop.Connection.respondTo(Connection.java:2701)
>> at com.ibm.rmi.iiop.Connection.doWork(Connection.java:2575)
>> at com.ibm.rmi.iiop.WorkUnitImpl.doWork(WorkUnitImpl.java:62)
>> at com.ibm.ejs.oa.pool.PooledThread.run(ThreadPool.java:118)
>> at com.ibm.ws.util.ThreadPool$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(VariableDeepPropertyNode.java:22)
>> at
>>
>> org.mvel.ast.PropertyASTNode.getReducedValueAccelerated(PropertyASTNode.java:21)
>> at
>>
>> org.mvel.ast.BinaryOperation.getReducedValueAccelerated(BinaryOperation.java: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(MVELPredicateExpression.java:45)
>> at
>> org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:209)
>> --
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>>
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>>
>
>
>
> --
> Edson Tirelli
> JBoss Drools Core Development
> JBoss, a division of Red Hat @ www.jboss.com
>
> _______________________________________________
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> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
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