[jboss-jira] [JBoss JIRA] Created: (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
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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: Mark Proctor
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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