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https://issues.apache.org/jira/browse/MAHOUT-205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12797192#action_12797192
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Jake Mannix commented on MAHOUT-205:
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Ok, blew away ~/.m2, clean checkout with the later patch applied, and "mvn 
clean compile" ends with BUILD SUCCESSFUL (after 17m 9s, oof!).  Anyone else 
try this patch to see if you see what Sean saw?

> Pull Writable (and anything else hadoop dependent) out of the matrix module
> ---------------------------------------------------------------------------
>
>                 Key: MAHOUT-205
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-205
>             Project: Mahout
>          Issue Type: Improvement
>          Components: Math
>    Affects Versions: 0.1
>         Environment: all
>            Reporter: Jake Mannix
>            Assignee: Jake Mannix
>            Priority: Minor
>             Fix For: 0.3
>
>         Attachments: MAHOUT-205.patch, MAHOUT-205.patch
>
>
> Vector and Matrix extend Writable, and while that was merely poorly coupled 
> before, it will be an actual problem now that we have a separate submodule 
> for matrix: this module should not depend on hadoop at all, ideally.   
> Distributed matrix work, as well as simply Writable wrappers can go somewhere 
> else (where?  core?  yet another submodule which depends on matrix?), but it 
> would be really nice if we could produce an artifact which doesn't require 
> Hadoop which has our core linear primitives.

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