[jboss-jira] [JBoss JIRA] (DROOLS-538) Unable to resolve class error , drools 5.5 in concurrent execution. JSR94Support and Spring

[Davide Sottara (JIRA)]

    [ https://issues.jboss.org/browse/DROOLS-538?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12981670#comment-12981670 ] 

Davide Sottara commented on DROOLS-538:
---------------------------------------

I see the problem, the issue is that 5.6 was not fully thread-safe either. 
Any chance you can try the 6.x series, and the 6.1.CR in particular? 
5.6 is final, too, so it won't be possible to include any new fix in that version
(unless you can compile the source code yourself)
It would interesting to see if the newer versions suffer from the same problem.
Could you please create a reproducer for us to test?
Thanks



> Unable to resolve class error , drools 5.5 in concurrent execution. JSR94Support and Spring 
> --------------------------------------------------------------------------------------------
>
>                 Key: DROOLS-538
>                 URL: https://issues.jboss.org/browse/DROOLS-538
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 5.5.0.Final
>         Environment: Linux Red Hat , Enterprise, JDK 1.6, Drools 5.5.Final 
>            Reporter: Maruthi Shanmugam
>            Assignee: Mark Proctor
>            Priority: Blocker
>
> We use Drools 5.5 and drool implementation is done through Spring JSR94Support API>
> The Rule engine is called in concurrent mode,
> i.e , JSR94Support.executeStateless(name,list) is executed through multiple threads.
> And when the rules are executed  we randomly get the following exception
> org.drools.RuntimeDroolsException: Unable to resolve class 'someclass(this is sample)here actual class is printed>'
>         at org.drools.base.ClassFieldAccessorCache.getClass(ClassFieldAccessorCache.java:126)
>         at org.drools.base.ClassFieldAccessorCache.getClassObjectType(ClassFieldAccessorCache.java:48)
>         at org.drools.reteoo.ClassObjectTypeConf.<init>(ClassObjectTypeConf.java:83)
>         at org.drools.common.ObjectTypeConfigurationRegistry.getObjectTypeConf(ObjectTypeConfigurationRegistry.java:71)
>         at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:159)
>         at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:903)
>         at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:847)
>         at org.drools.reteoo.ReteooStatelessSession.executeWithResults(ReteooStatelessSession.java:273)
> The rules are registered every 15 minutes through RuleAdministrator.registerRuleExecutionset ,
> so whenever we refresh the rules and the subsequent thread even after the registration is completed, fails with the above message. This happens only when the rules are invoked concurrently. 



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