[jira] [Assigned] (TUSCANY-3939) URLClassLoader locks the contrubution jar.

["ant elder (JIRA)" <de...@tuscany.apache.org>]

     [ https://issues.apache.org/jira/browse/TUSCANY-3939?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ant elder reassigned TUSCANY-3939:
----------------------------------

    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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