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Posted to issues@maven.apache.org by "Jason van Zyl (JIRA)" <ji...@codehaus.org> on 2007/02/12 02:02:13 UTC

[jira] Closed: (MNG-2795) Classloader problem loading a resource from a build extension Jar : difference between 2.0.4 and (future) 2.0.5

     [ http://jira.codehaus.org/browse/MNG-2795?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jason van Zyl closed MNG-2795.
------------------------------

    Resolution: Fixed

Used test project and everything works fine.

> Classloader problem loading a resource from a build extension Jar : difference between 2.0.4 and (future) 2.0.5
> ---------------------------------------------------------------------------------------------------------------
>
>                 Key: MNG-2795
>                 URL: http://jira.codehaus.org/browse/MNG-2795
>             Project: Maven 2
>          Issue Type: Bug
>    Affects Versions: 2.0.5
>            Reporter: Fabrice BELLINGARD
>         Assigned To: Jason van Zyl
>             Fix For: 2.0.5
>
>         Attachments: Checkstyle-2.0.4.txt, Checkstyle-2.0.5.txt, Test-BuildExtension.zip
>
>
> I had a problem when executing the Checkstyle plugin (version 2.1) with the pre-release of Maven 2.0.5. So I dug a bit to see if this could be related to maven core or not, and here is what I found.
> I isolated the code that breaks the build in the checkstyle plugin: it happens when the plugin tries to load my Checkstyle configuration file, which is actually located in a JAR that is specified in the build extensions. The code lies in the Locator#resolveLocation() method:
>                 // Attempt a Resource.
>                  URL url = this.getClass().getClassLoader().getResource( location );
> This code returns null for the "url" variable, which in turns breaks the plugin because it doesn't find any configuration file.
> I haven't had the time to dig more into it, but I found the following issue that might be related to this problem: "MNG-2228 : Classloader problem loading jars from build extensions". Brett and Carlos worked on it and fixed it, so maybe they could tell more about it.
> I attached the logs of the execution with Maven 2.0.4 (which works fine) and Maven 2.0.5 (which breaks). I haven't had the time yet to dig further into that problem.

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