[jboss-jira] [JBoss JIRA] (DROOLS-5449) ClassCastException upon unreferenced declare update

[Mario Fusco (Jira)]

     [ https://issues.redhat.com/browse/DROOLS-5449?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mario Fusco updated DROOLS-5449:
--------------------------------
    Sprint: 2020 Week 25-27 (from Jun 15)


> ClassCastException upon unreferenced declare update
> ---------------------------------------------------
>
>                 Key: DROOLS-5449
>                 URL: https://issues.redhat.com/browse/DROOLS-5449
>             Project: Drools
>          Issue Type: Bug
>          Components: core engine
>    Affects Versions: 7.38.0.Final
>            Reporter: Matteo Casalino
>            Assignee: Mario Fusco
>            Priority: Major
>         Attachments: class-cast-exception-on-unreferenced-declare-update.zip
>
>
> After updating a declared type that is not referenced in the rules with _updateToVersion()_,
>  running _fireAllRules()_ many times in a loop throws _ClassCastException_.
> E.g., when the following DRL:
> {noformat}
> declare UnreferencedType
>  x : int
> end 
> declare ReferencedType
>  str : String
> end
>  
> rule "example rule"
> when
>  ReferencedType( str == "A" )
> then
> end{noformat}
> is updated to:
> {noformat}
> declare UnreferencedType
>  x : int
>  newField : String
> end 
> declare ReferencedType
>  str : String
> end
>  
> rule "example rule"
> when
>  ReferencedType( str == "A" )
> then
> end{noformat}
> the following exception it thrown by _fireAllRules()_:
> {noformat}
> java.lang.RuntimeException: Error evaluating constraint 'str == "A"' in [Rule "example rule" in org/example/rules.drl]
>  at org.drools.core.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:277)
>  at org.drools.core.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:225)
>  at org.drools.core.reteoo.AlphaNode.assertObject(AlphaNode.java:139)
>  ...
>  Caused by: java.lang.ClassCastException: class org.example.ReferencedType cannot be cast to class org.example.ReferencedType (org.example.ReferencedType is in unnamed module of loader org.drools.dynamic.DynamicProjectClassLoader$DefaultInternalTypesClassLoader @46292372; org.example.ReferencedType is in unnamed module of loader org.drools.dynamic.DynamicProjectClassLoader$DefaultInternalTypesClassLoader @23b8d9f3)
>  at ConditionEvaluator7ed8b2c57cad4e74b856fdba30554aa1.evaluate(Unknown Source)
>  at org.drools.core.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:275)
>  ... 43 more{noformat}



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