[jboss-jira] [JBoss JIRA] (JBRULES-3283) Concurrency issue: Invalid bytecode generated by KnowledgeBuilder.add()

[Marcel May (Commented) (JIRA)]

    [ https://issues.jboss.org/browse/JBRULES-3283?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12653751#comment-12653751 ] 

Marcel May commented on JBRULES-3283:
-------------------------------------

I got the same issue after upgrading from 5.2.x to 5.3.1.Final.
Adding the synchronized workaround as suggested helps.
                
> Concurrency issue: Invalid bytecode generated by KnowledgeBuilder.add()
> -----------------------------------------------------------------------
>
>                 Key: JBRULES-3283
>                 URL: https://issues.jboss.org/browse/JBRULES-3283
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: drools-compiler (expert)
>    Affects Versions: 5.3.0.CR1, 5.3.0.Final
>         Environment: Oracle Java 6, Oracle Java 7, Linux, MacOS
> java version "1.6.0_26"
> Java(TM) SE Runtime Environment (build 1.6.0_26-b03-384-10M3425)
> Java HotSpot(TM) 64-Bit Server VM (build 20.1-b02-384, mixed mode)
>            Reporter: Thomas Kruse
>            Assignee: Mark Proctor
>            Priority: Minor
>         Attachments: drools53.tgz
>
>
> Since Drools 5.3.0.CR1 concurrent creation of different knowledgebases from filesystem DRL rule definition leads to illegal bytecode.
> Reproduceable with Janino and eclipse compiler.
> I have a maven based test project which executes the unit tests in parallel, this is the result:
> {code}
> runFirst(de.trion.drools53.TwoTest): -1
>   runFirst(de.trion.drools53.FourTest): (class: de/trion/drools53/Rule_When_a_user_is_young__print_his_name_DefaultConsequenceInvoker, method: equals signature: (Ljava/lang/Object;)Z) Expecting to find integer on stack
>   runSecond(de.trion.drools53.FourTest): (class: de/trion/drools53/Rule_When_a_user_is_young__print_his_name_DefaultConsequenceInvoker, method: equals signature: (Ljava/lang/Object;)Z) Expecting to find integer on stack
>   runFirst(de.trion.drools53.OneTest): (class: de/trion/drools53/Rule_When_a_user_is_young__print_his_name_DefaultConsequenceInvoker, method: equals signature: (Ljava/lang/Object;)Z) Expecting to find integer on stack
>   runFirst(de.trion.drools53.ThreeTest): (class: de/trion/drools53/Rule_When_a_user_is_young__print_his_name_DefaultConsequenceInvoker, method: equals signature: (Ljava/lang/Object;)Z) Incompatible object argument for function call
>   runSecond(de.trion.drools53.ThreeTest): (class: de/trion/drools53/Rule_When_there_is_god__the_light_always_shines_DefaultConsequenceInvoker, method: equals signature: (Ljava/lang/Object;)Z) Unable to pop operand off an empty stack
> {code}
> Workaround: synchronize access
> Not affected: Drools 5.3.0.Beta

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.jboss.org/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira