[jboss-jira] [JBoss JIRA] (JBRULES-3033) java.lang.ClassCastException when change rule condition and declarative facts/events are used

java.lang.ClassCastException when change rule condition and declarative facts/events are used --------------------------------------------------------------------------------------------- Key: JBRULES-3033 URL: https://issues.jboss.org/browse/JBRULES-3033 Project: Drools Issue Type: Bug Security Level: Public(Everyone can see) Components: drools-core Affects Versions: 5.1.1.FINAL Reporter: Federico Weisse Assignee: Mario Fusco Fix For: 5.5.0.Beta1 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)