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

[Sergey Alaev (JIRA)]

Sergey Alaev created DROOLS-486:
-----------------------------------

             Summary: 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: Mark Proctor


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 parents 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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