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https://issues.apache.org/jira/browse/MSOURCES-141?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17767149#comment-17767149
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Cheng Pan commented on MSOURCES-141:
------------------------------------
it also breaks creating a shaded source jar
> Check duplication of attached jar should be configurable to not fail when
> using the build cache
> -----------------------------------------------------------------------------------------------
>
> Key: MSOURCES-141
> URL: https://issues.apache.org/jira/browse/MSOURCES-141
> Project: Maven Source Plugin
> Issue Type: Bug
> Affects Versions: 3.3.0
> Reporter: Olivier Lamy
> Assignee: Olivier Lamy
> Priority: Major
> Fix For: 3.3.1
>
> Attachments: issue-msources-141.zip
>
>
> because https://issues.apache.org/jira/browse/MSOURCES-121 using source jar
> mojo and build cache generate an error as the cache restore a project with
> attached artifacts and so the source mojo fail because of this.
> {code}
> Caused by: org.apache.maven.plugin.MojoExecutionException: Presumably you
> have configured maven-source-plugn to execute twice times in your build. You
> have to configure a classifier for at least on of them.
> at org.apache.maven.plugins.source.AbstractSourceJarMojo.packageSources
> (AbstractSourceJarMojo.java:309)
> at org.apache.maven.plugins.source.AbstractSourceJarMojo.packageSources
> (AbstractSourceJarMojo.java:257)
> at org.apache.maven.plugins.source.AbstractSourceJarMojo.execute
> (AbstractSourceJarMojo.java:225)
> at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo
> (DefaultBuildPluginManager.java:126)
> at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2
> (MojoExecutor.java:328)
> at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute
> (MojoExecutor.java:316)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:212)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:174)
> at org.apache.maven.lifecycle.internal.MojoExecutor.access$000
> (MojoExecutor.java:75)
> at org.apache.maven.lifecycle.internal.MojoExecutor$1.run
> (MojoExecutor.java:162)
> at
> org.apache.maven.buildcache.BuildCacheMojosExecutionStrategy.restoreProject
> (BuildCacheMojosExecutionStrategy.java:224)
> at org.apache.maven.buildcache.BuildCacheMojosExecutionStrategy.execute
> (BuildCacheMojosExecutionStrategy.java:131)
> {code}
>
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