[jira] Commented: (MNG-5019) [regression] String-based component lookups performed by report mojos fail with ClassCastException

["Olivier Lamy (JIRA)" <ji...@codehaus.org>]

    [ http://jira.codehaus.org/browse/MNG-5019?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=257595#action_257595 ] 

Olivier Lamy commented on MNG-5019:
-----------------------------------

I don't really understand why you move this back to Major ??
IMHO it's a *blocker* regression in 3.0.2 !

> [regression] String-based component lookups performed by report mojos fail with ClassCastException
> --------------------------------------------------------------------------------------------------
>
>                 Key: MNG-5019
>                 URL: http://jira.codehaus.org/browse/MNG-5019
>             Project: Maven 2 & 3
>          Issue Type: Bug
>          Components: Class Loading
>    Affects Versions: 3.0.2
>            Reporter: Benjamin Bentmann
>             Fix For: 3.0.3
>
>
> From the IT MSITE-506 of the Site Plugin:
> {noformat}
> Caused by: java.lang.ClassCastException: org.codehaus.plexus.archiver.zip.ZipUnArchiver$__plexus6
>   at org.codehaus.plexus.archiver.manager.DefaultArchiverManager.getUnArchiver(DefaultArchiverManager.java:76)
>   at org.apache.maven.plugin.javadoc.resolver.ResourceResolver.resolveAndUnpack(ResourceResolver.java:357)
>   at org.apache.maven.plugin.javadoc.resolver.ResourceResolver.resolveFromArtifacts(ResourceResolver.java:302)
>   at org.apache.maven.plugin.javadoc.resolver.ResourceResolver.resolveDependencySourcePaths(ResourceResolver.java:143)
>   at org.apache.maven.plugin.javadoc.AbstractJavadocMojo.getDependencySourcePaths(AbstractJavadocMojo.java:2169)
>   at org.apache.maven.plugin.javadoc.AbstractJavadocMojo.getSourcePaths(AbstractJavadocMojo.java:2058)
>   at org.apache.maven.plugin.javadoc.JavadocReport.canGenerateReport(JavadocReport.java:213)
>   at org.apache.maven.plugins.site.DefaultMavenReportExecutor.canGenerateReport(DefaultMavenReportExecutor.java:299)
>   at org.apache.maven.plugins.site.DefaultMavenReportExecutor.buildMavenReports(DefaultMavenReportExecutor.java:278) 
> {noformat}
> Cause is the following container scenario:
> {noformat}
>   maven-realm
>     site-plugin-realm        <-- plexus lookup realm
>       javadoc-plugin-realm   <-- TCCL
> {noformat}
> where both the Site Plugin and the Javadoc Plugin depend on plexus-archiver.
> The way the container resolves string-based roles is to first check the lookup realm, then the TCCL for the interface/component. In the setup above, this ends up using components from the Site Plugin for the execution of the Javadoc Plugin, boom.
> After talking with Stuart, the fix seems to be as simple as just nullifying the lookup realm, thereby consequently using the TCCL for the lookups.

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