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https://issues.apache.org/jira/browse/MAHOUT-1864?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15304337#comment-15304337
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ASF GitHub Bot commented on MAHOUT-1864:
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Github user andrewpalumbo commented on the pull request:
https://github.com/apache/mahout/pull/236#issuecomment-222198320
Thank you for the patch, @girirajsharma. As you point out, `HADOOP_HOME`
is a requisite in both local and distributed mode. So they are in fact working
properly. IMO It would be best not to overcomplicate these scripts.
Mahout has actually phased out MapReduce over the past two years (see
MAHOUT-1510) and now uses the Mahout "Samsara" framework:
http://mahout.apache.org/users/sparkbindings/home.html. Mahout is not
accepting new MapReduce features. Thank you.
> Twenty Newsgroups Classification Example fails in case running with
> MAHOUT_LOCAL=true
> --------------------------------------------------------------------------------------
>
> Key: MAHOUT-1864
> URL: https://issues.apache.org/jira/browse/MAHOUT-1864
> Project: Mahout
> Issue Type: Improvement
> Components: Examples
> Affects Versions: 0.12.0
> Reporter: giriraj sharma
> Priority: Minor
> Labels: easyfix, easytest, newbie
> Fix For: 0.13.0
>
>
> Twenty Newsgroups Classification Example fails in case running with
> {{MAHOUT_LOCAL=true}} or else when {{HADOOP_HOME}} env variable is not set.
> [Newsgroups|https://mahout.apache.org/users/classification/twenty-newsgroups.html]
> lists instructions in order to run this classifier. When running in
> standalone mode({{MAHOUT_LOCAL=true}}), i.e., running {{$
> ./examples/bin/classify-20newsgroups.sh}}, the script runs
> {{./examples/bin/set-dfs-commands.sh}} internally to export hadoop related
> env variables.
> {{set-dfs-commands.sh}} attempts to check for hadoop version despite running
> with {{MAHOUT_LOCAL}} set as true. IMHO, the script works fine considering
> the prerequisites, but, it will as well make sense if we can update the
> script {{./examples/bin/set-dfs-commands.sh}} to export hadoop env varibales
> only in case {{MAHOUT_LOCAL}} is not set to true.
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