[jboss-jira] [JBoss JIRA] (DROOLS-486) Multiple ClassCastException-s when executing rules

[Mario Fusco (JIRA)]

     [ https://issues.jboss.org/browse/DROOLS-486?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mario Fusco reassigned DROOLS-486:
----------------------------------

    Assignee: Mario Fusco  (was: Mark Proctor)


> Multiple ClassCastException-s when executing rules
> --------------------------------------------------
>
>                 Key: DROOLS-486
>                 URL: https://issues.jboss.org/browse/DROOLS-486
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 6.0.1.Final
>         Environment: JDK6, single-threaded execution
>            Reporter: Sergey Alaev
>            Assignee: Mario Fusco
>
> When trying to migrate to Drools 6.0.1 (everything was fine with 6.0.0) we get multiple ClassCastException.
> Assume we have hierarchy where B and C are children of A and we have following rules:
> when:
>    B(....)
> then:
>    ...
> when:
>    C(...)
> then:
>    ...
> Then following exceptions are observed on every execute with instance of B() in context:
> java.lang.ClassCastException: B cannot be cast to C
> 	at org.drools.core.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:217)
> 	at org.drools.core.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:174)
> 	at org.drools.core.phreak.PhreakFromNode.checkConstraintsAndPropagate(PhreakFromNode.java:298)
> 	at org.drools.core.phreak.PhreakFromNode.doLeftInserts(PhreakFromNode.java:101)
> 	at org.drools.core.phreak.PhreakFromNode.doNode(PhreakFromNode.java:49)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.innerEval(RuleNetworkEvaluator.java:348)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.outerEval(RuleNetworkEvaluator.java:161)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.evaluateNetwork(RuleNetworkEvaluator.java:116)
> 	at org.drools.core.phreak.RuleExecutor.reEvaluateNetwork(RuleExecutor.java:200)
> 	at org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:67)
> 	at org.drools.core.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:935)
> 	at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1200)
> 	at org.drools.core.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:957)
> 	at org.drools.core.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:941)
> 	at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:264)
> Again, everything works OK in Drools 6.0.0.



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