[jira] Commented: (MAHOUT-368) should package core ,math and collections to one Jar package for hadoop recommendations

["Hui Wen Han (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAHOUT-368?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12880837#action_12880837 ] 

Hui Wen Han commented on MAHOUT-368:
------------------------------------

packaging  core ,math and collections to one Jar package for org.apache.mahout.cf.taste.hadoop.item.RecommenderJob  is very imperative in real environment.

In a real project,if we used org.apache.mahout.cf.taste.hadoop.item.RecommenderJob and want to package the whole project to one single jar,

we have to package  core ,math and collections to one Jar package manually, because mahout update quickly ,so it is very annoying so this.

if Mahout project can provide this ,we can depend it in the Maven POM file and package the whole project and it's dependent jar  easily.

> should package core ,math and collections to one Jar package for hadoop recommendations
> ---------------------------------------------------------------------------------------
>
>                 Key: MAHOUT-368
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-368
>             Project: Mahout
>          Issue Type: Improvement
>          Components: Collaborative Filtering
>    Affects Versions: 0.4
>            Reporter: Hui Wen Han
>            Assignee: Sean Owen
>             Fix For: 0.4
>
>
> should package core ,math and collections to one Jar package for org.apache.mahout.cf.taste.hadoop.item.RecommenderJob.
> because RecommenderJob used classes  (for example org.apache.mahout.math.VectorWritable )of the  math module of mahout project,
> but math and core module is the separated jar package.
> so when work on the hadoop env ,the class of math module can not load to classloader in the datanode.
> it will cause class not found exception.
> the work around is package all mahout classes to one package manually.

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