[jboss-jira] [JBoss JIRA] Commented: (JBRULES-2253) ClassNotFound when ASM optimizer kicks in in MVEL consequence

[josh krupka (JIRA)]

    [ https://issues.jboss.org/browse/JBRULES-2253?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12609291#comment-12609291 ] 

josh krupka commented on JBRULES-2253:
--------------------------------------

I was never able to break it using a simple reproducible test case, and ended up changing the class to be declared in an external .java file to get around it in our application.  It seemed to break only when there were enough facts/rules fired to cause the ASM optimizer to kick in, and the class I was having a problem with referred to a class that had an object tree several levels deep.  That could have been part of the problem as well.

> ClassNotFound when ASM optimizer kicks in in MVEL consequence
> -------------------------------------------------------------
>
>                 Key: JBRULES-2253
>                 URL: https://issues.jboss.org/browse/JBRULES-2253
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: drools-core
>    Affects Versions: 5.0.1.FINAL
>            Reporter: Michael Neale
>            Assignee: Tihomir Surdilovic
>            Priority: Critical
>             Fix For: 5.3.0.M1
>
>         Attachments: repository_export_mic.zip
>
>
> (ok if the subject is really confusing, perhaps this bug isn't for you). 
> In chasing down JBRULES-2234 I found this. Instructions (apologies for relying on Guvnor to reproduce): 
> To reproduce is not
> easy, but here are some instructions:
> * Run latest Guvnor (if you are able to, if not, then the rest is moot !).
> * Import the attached repo (unzip it first).
> * browse to KnowledgeBases/org/acme/insurance/pricing/
> - press "build package"
> * shut it down, restart (flushes caches etc...)
> Then:
> * browse to KnowledgeBases/org/acme/insurance/pricing/Test Scenarios
> * open PolicyQuotePackageTest
> * run it:
> Now you should see an exception like this:
> Caused by: java.lang.NoClassDefFoundError: org/acme/insurance/Policy
>        at ASMAccessorImpl_62408281250565694450.setValue(Unknown Source)
>        at org.mvel2.optimizers.dynamic.DynamicSetAccessor.setValue(DynamicSetAccessor.java:74)
>        at org.mvel2.compiler.CompiledAccExpression.setValue(CompiledAccExpression.java:47)
>        at org.mvel2.MVEL.executeSetExpression(MVEL.java:962)
>        at org.mvel2.ast.WithNode$ParmValuePair.eval(WithNode.java:242)
>        at org.mvel2.ast.WithNode.getReducedValueAccelerated(WithNode.java:67)
>        at org.mvel2.ast.InterceptorWrapper.getReducedValueAccelerated(InterceptorWrapper.java:38)
>        at org.mvel2.MVELRuntime.execute(MVELRuntime.java:85)
>        at org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:104)
>        at org.mvel2.MVEL.executeExpression(MVEL.java:995)
>        at org.drools.base.mvel.MVELConsequence.evaluate(MVELConsequence.java:91)
>        at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:966)
> This is due to it loading a previously serialized version of the KB.
> If it was to run off a freshly compiled one, its all fine. Also, if I
> tell MVEL to NOT use ASM optimizer, it works fine (using reflection).
> So clearly the stuff is available to the classpath in the right
> places... its only to do with ASM in mvel post deserialization. (and
> for that to happen, MVEL has to execute the compiled expression enough
> to kick in the JIT).
> MVELCompilationUnit in drools is worth examining too... still not sure where the problem lies. 

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