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http://jira.codehaus.org/browse/MSHADE-30?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=138787#action_138787
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richard rattigan commented on MSHADE-30:
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I have the same problem. I can't get "mvn release:perform" to work, even if I
do "mvn clean" beforehand.
I also see this doing regular builds, when it can be fixed with an "mvn clean".
Of course, this should not be necessary.
> duplicate entry error
> ---------------------
>
> Key: MSHADE-30
> URL: http://jira.codehaus.org/browse/MSHADE-30
> Project: Maven 2.x Shade Plugin
> Issue Type: Bug
> Affects Versions: 1.0.1
> Reporter: Michael Mattox
>
> I receive this error:
> Embedded error: duplicate entry: org/apache/xmlbeans/FilterXmlObject.class
> It started with a javax.xml.namespace class. So I started putting excludes,
> and then I kept getting one new class after another. If I exclude everything
> then I doubt my application is going to work.
> I really don't understand this error. I have never seen this type of error
> with the fatjar eclipse plugin. I understand it's complaining about having
> the same class twice, but if it's not a problem for my eclipse project or the
> maven build, why is it a problem for shade?
> I feel the shade plugin should be able to handle this gracefully.
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