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https://issues.apache.org/jira/browse/MAHOUT-1338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13772928#comment-13772928
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Sean Owen commented on MAHOUT-1338:
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Guys I'm going to proceed with this. It should entail no functional change, is
just a packaging simplification, and all still compiles and runs.
> Reduce mahout-integration transitive dependencies to avoid JAR hell, version
> conflicts
> --------------------------------------------------------------------------------------
>
> Key: MAHOUT-1338
> URL: https://issues.apache.org/jira/browse/MAHOUT-1338
> Project: Mahout
> Issue Type: Improvement
> Affects Versions: 0.8
> Reporter: Sean Owen
> Assignee: Sean Owen
> Priority: Minor
> Attachments: MAHOUT-1338.patch
>
>
> mahout-integration contains bits of client and connector code for a lot of
> projects, like Lucene, Cassandra, MongoDB, etc. As such, its transitive
> dependencies in Maven pull in quite a lot.
> Most of these are unnecessary for any particular user, since probably at most
> one client/package is of interest. In fact, mahout-integration is not used by
> most users at all.
> In the worst case, it causes actual version problems when trying to package
> up the transitive dependencies of something depending on Mahout.
> I suggest several changes along these lines, all of which are represented in
> the attached patch:
> 1. Remove direct lucene-core and cassandra-all dependencies, as they are not
> necessary
> 2. Mark all dependencies like hector, mongodb, etc as optional in Maven
> 3. In fact, mark mahout-examples, mahout-buildtools and mahout-integration as
> optional with respect to the overall project.
> 4. Bonus: update Cassandra client version to pull in slightly newer deps
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