Classloader problem loading a resource from a build extension Jar : difference
between 2.0.4 and (future) 2.0.5
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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
Attachments: Checkstyle-2.0.4.txt, Checkstyle-2.0.5.txt
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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