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http://jira.codehaus.org/browse/MNG-2443?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=132631#action_132631
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Matthew Buckett commented on MNG-2443:
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One issue is that if a POM isn't present for a artifact then the download of
this POM is attempted every build even if the repository is configured to only
be checked for updates less frequently, this can make a large build slow down
considerably.
> Don't download pom if artifact is already in the local repository
> -----------------------------------------------------------------
>
> Key: MNG-2443
> URL: http://jira.codehaus.org/browse/MNG-2443
> Project: Maven 2
> Issue Type: Bug
> Components: Artifacts and Repositories
> Affects Versions: 2.0.4
> Reporter: Carsten Ziegeler
> Assignee: Jason van Zyl
> Fix For: 2.1
>
>
> There are many projects out there just providing their artifact without a pom
> (whether this is good or not is a different question). Now in this case m2
> always tries to download a pom for those artifacts, even if the artifact
> itself is already in the local repository. And if you have several of those
> artifacts combined with more than one repository configured, then there are a
> lot of unnecessary download attempts.
> I think this falls into the same category as changing a pom in the repository
> (which should be forbidden) - so if for the first time the artifact is
> downloaded no pom available, then there will never be a pom for this specific
> artifact.
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