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  1. JBRULES
  2. JBRULES-3033

java.lang.ClassCastException when change rule condition and declarative facts/events are used

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      We have drl files where we declare events. we use declarative events (there is no java class AlertaPosManual)
      (like this)
      declare AlertaPosManual
      @role (event)
      @expires(10s)
      idTerminal : java.lang.String
      end

      We use a StatefullSession for fusion cep and we need that changes in rules refresh the kBase in runtime. But when a rule condition changes this exception in throw

      Exception in thread "Thread-2" java.lang.ClassCastException: com.sample.ConsumoPostManual cannot be cast to com.sample.ConsumoPostManual
      at org.drools.base.com.sample.ConsumoPostManual17710704$getIdTerminal.getValue(Unknown Source)
      at org.drools.base.extractors.BaseObjectClassFieldReader.getHashCode(BaseObjectClassFieldReader.java:192)
      at org.drools.base.ClassFieldReader.getHashCode(ClassFieldReader.java:193)
      at org.drools.core.util.AbstractHashTable$SingleIndex.hashCodeOf(AbstractHashTable.java:582)
      at org.drools.core.util.RightTupleIndexHashTable.getOrCreate(RightTupleIndexHashTable.java:360)
      at org.drools.core.util.RightTupleIndexHashTable.add(RightTupleIndexHashTable.java:243)
      at org.drools.reteoo.AccumulateNode.assertObject(AccumulateNode.java:246)
      at org.drools.reteoo.ObjectTypeNode.updateSink(ObjectTypeNode.java:276)
      at org.drools.reteoo.PropagationQueuingNode.updateSink(PropagationQueuingNode.java:111)
      at org.drools.reteoo.BetaNode.attach(BetaNode.java:214)
      at org.drools.reteoo.builder.BuildUtils.attachNode(BuildUtils.java:151)
      at org.drools.reteoo.builder.CollectBuilder.build(CollectBuilder.java:114)
      at org.drools.reteoo.builder.PatternBuilder.attachPattern(PatternBuilder.java:111)
      at org.drools.reteoo.builder.PatternBuilder.build(PatternBuilder.java:72)
      at org.drools.reteoo.builder.GroupElementBuilder$AndBuilder.build(GroupElementBuilder.java:132)
      at org.drools.reteoo.builder.GroupElementBuilder.build(GroupElementBuilder.java:78)
      at org.drools.reteoo.builder.ReteooRuleBuilder.addSubRule(ReteooRuleBuilder.java:155)
      at org.drools.reteoo.builder.ReteooRuleBuilder.addRule(ReteooRuleBuilder.java:128)
      at org.drools.reteoo.ReteooBuilder.addRule(ReteooBuilder.java:117)
      at org.drools.reteoo.ReteooRuleBase.addRule(ReteooRuleBase.java:428)
      at org.drools.common.AbstractRuleBase.addRule(AbstractRuleBase.java:721)
      at org.drools.common.AbstractRuleBase.addPackages(AbstractRuleBase.java:545)
      at org.drools.reteoo.ReteooRuleBase.addPackages(ReteooRuleBase.java:445)
      at org.drools.reteoo.ReteooRuleBase.addPackage(ReteooRuleBase.java:452)
      at org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:937)
      at org.drools.agent.impl.KnowledgeAgentImpl.incrementalBuildResources(KnowledgeAgentImpl.java:821)
      at org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:586)
      at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:185)
      at org.drools.agent.impl.KnowledgeAgentImpl$ChangeSetNotificationDetector.run(KnowledgeAgentImpl.java:1106)
      at java.lang.Thread.run(Thread.java:619)

      I think that's because the statefullSession has an instance of
      com.sample.ConsumoPostManual (loaded with the classLoader
      org.drools.rule.JavaDialectRuntimeData$PackageClassLoader@1218b25) But when
      the kBase is regenerated and the class com.sample.ConsumoPostManual to, the
      classLoader org.drools.rule.JavaDialectRuntimeData is recreated so there
      are two versions of the class com.sample.ConsumoPostManual in differents
      classLoader (one in the statefullSession and the other in the kBase)

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              mfusco@redhat.com Mario Fusco
              fedeweisse Federico Weisse (Inactive)
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                Updated:
                Resolved: