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https://issues.apache.org/jira/browse/TUSCANY-3939?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ant elder reassigned TUSCANY-3939:
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    Assignee: ant elder

> URLClassLoader locks the contrubution jar.
> ------------------------------------------
>
>                 Key: TUSCANY-3939
>                 URL: https://issues.apache.org/jira/browse/TUSCANY-3939
>             Project: Tuscany
>          Issue Type: Bug
>          Components: Java SCA Assembly Model
>    Affects Versions: Java-SCA-2.0-Beta1
>         Environment: All
>            Reporter: Hasan Muhammad
>            Assignee: ant elder
>            Priority: Critical
>             Fix For: Java-SCA-2.0
>
>
> When a contribution is started, tuscany 2.0 uses URLClassLoader to load the 
> classes/resources from the contribution. It locks the jar file and does not 
> release the lock even on contribution stop. This is not a bug in tuscany 
> code. This is a problem with Sun's URLClassLoader. Sun has a fix for this 
> that is planned for Java 1.7. But for now, during contribution stop, the 
> following method could be used without any issues, to release the classloader 
> and all the resources it holds
> ClassLoaderUtil.releaseLoader((URLClassLoader)context.getApplicationClassLoader().getParent());
> Note that this method needs to be called on all Unused Contributions in the 
> node, so that those contributions are also unlocked. The list of unused 
> contributions already exists in the node since we have the following method
> node.stopCompositeAndUninstallUnused

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