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https://issues.apache.org/jira/browse/HADOOP-761?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12471549
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Nigel Daley commented on HADOOP-761:
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Streaming tests and libhdfs tests also use /tmp.
> Unit tests should cleanup created files in /tmp. It causes tests to fail if
> more than one users run tests on same machine.
> --------------------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-761
> URL: https://issues.apache.org/jira/browse/HADOOP-761
> Project: Hadoop
> Issue Type: Bug
> Components: test
> Reporter: Sanjay Dahiya
> Assigned To: Nigel Daley
> Priority: Minor
>
> TestMiniMRLocalFS test cases creates /tmp/wc/input/, which is not cleaned
> up, any other user running test on same machine simultaneously or later will
> see test failures.
> It should either use a temp directory in the build/test or use java's
> File.createTempFile method for temporary data and then clean it up.
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