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https://issues.apache.org/jira/browse/MAHOUT-427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12885774#action_12885774
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Drew Farris commented on MAHOUT-427:
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I wasn't able to reproduce this issue following the wiki instructions (up to
step 9, running the hadoop cluster in single-node mode), leaving out the mvn
install on the examples directory.
Is there any chance you could try a 'mvn clean install' (from the base
directory) with your working copy to see if it still refuses to build an
examples job? Otherwise, could you check out a fresh copy and give that a try?
Somewhat unrelated but worth noting: when I did run build-reuters,sh, k-means
converged after 8 iterations instead of 10 and thus the clusterdump step did
not complete successfully. When you finally managed to get the examples to run,
what was the highest numbered clusters-* directory in
examples/bin/work/reuters-kmeans
> $MAHOUT_HOME/examples/bin/build-reuters.sh doesn't run successfully because
> of classpath issues related to the -core argument
> -----------------------------------------------------------------------------------------------------------------------------
>
> Key: MAHOUT-427
> URL: https://issues.apache.org/jira/browse/MAHOUT-427
> Project: Mahout
> Issue Type: Bug
> Affects Versions: 0.4
> Environment: Hadoop installation on EC2 as described here -
> https://cwiki.apache.org/MAHOUT/mahoutec2.html
> Reporter: Peter Goldstein
>
> Once I resolved issue MAHOUT-426 , I was still not able to run the
> ./examples/bin/build-reuters.sh script without errors These were
> ClassNotFoundExceptions, indicating a problem with the classpath.
> The issue appears to be related to the "-core" argument, which controls the
> classpath. Placing '-core' as the first argument to the individual
> $MAHOUT_HOME/bin/mahout calls in the script solved the issue, but I'm not
> sure it was the correct solution. It's unclear to me what the '-core'
> argument is supposed to signify.
> Can someone shed some light on this, and tell me whether this is the correct
> solution to the problem? And if not, what is the correct solution to this
> classpath issue.
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