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https://issues.apache.org/jira/browse/MAHOUT-1200?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13646422#comment-13646422
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Isabel Drost commented on MAHOUT-1200:
--------------------------------------
I'm happy with any naming schema, for add long add we keep the random number in
there add otherwise we run into issues when more than one suite is running
(potentially on a continuous integration server) or when many users run the
test sit (e.g. remember the trouble we had on people.Apache.org
> Mahout tests depend on writing to /tmp/hadoop-$user
> ---------------------------------------------------
>
> Key: MAHOUT-1200
> URL: https://issues.apache.org/jira/browse/MAHOUT-1200
> Project: Mahout
> Issue Type: Bug
> Components: build
> Affects Versions: 0.7
> Reporter: Isabel Drost
> Attachments: MAHOUT-1200.patch
>
>
> Running the Mahout test suite creates the temp directory /tmp/hadoop-$user
> which is used by all Hadoop related tests that pull up a local cluster. The
> directory is not removed after running the tests. In particular when running
> multiple tests in parallel on the same machine as the same user this can lead
> to problems.
> To re-produce issue the following commands prior to running the full test
> suite:
> mkdir /tmp/hadoop-$USER
> chmod 000 /tmp/hadoop-$USER
> mvn test
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