[jira] Updated: (MAHOUT-177) Fix for "java.lang.ClassNotFoundException Exception"

["Deneche A. Hakim (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MAHOUT-177?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Deneche A. Hakim updated MAHOUT-177:
------------------------------------

    Attachment: cnf_fix.patch

*important* I tested only the SyntheticControl examples

> Fix for "java.lang.ClassNotFoundException Exception"
> ----------------------------------------------------
>
>                 Key: MAHOUT-177
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-177
>             Project: Mahout
>          Issue Type: Bug
>    Affects Versions: 0.2
>            Reporter: Deneche A. Hakim
>            Priority: Minor
>             Fix For: 0.2
>
>         Attachments: cnf_fix.patch
>
>
> When trying to run the Synthetic Control Data examples (http://cwiki.apache.org/MAHOUT/syntheticcontroldata.html) in a pseudo-distributed Hadoop cluster I got the *java.lang.ClassNotFoundException* exception in kmeans and dirichlet. canopy and meanshift worked perfectly.
> The past solution was to flatten the examples jar: unjar all the libs and pack them in a single jar file. I found that, *for the clustering examples*, you only need to unpack the mahout-core jar, and because the compiled classes are already available in core/target/classes I changed maven/build.xml as follows:
> * grab the core/target/classes directly instead of the packed jar
> * exclude apache-mahout-core-*.jar, this should exclude both apache-mahout-core.jar and apache-mahout-core-tests.jar (do the examples really need the core-tests jar ?)

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