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From "Chris Douglas (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-7013) Tests of internal logic should not use the local FS as scratch space
Date Wed, 22 Nov 2017 16:44:00 GMT
Chris Douglas created MAPREDUCE-7013:
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             Summary: Tests of internal logic should not use the local FS as scratch space
                 Key: MAPREDUCE-7013
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-7013
             Project: Hadoop Map/Reduce
          Issue Type: Test
            Reporter: Chris Douglas


MapReduce often manipulates files/permissions to ensure splits, dependencies, and other user
data are consistently managed. Unit tests of these internal methods sometimes set up temporary
hierarchies in a scratch directory on the local FS to exercise these modules. However, dev
environment quirks (e.g., umask) can cause these tests to fail spuriously. Instead, this logic
should be validated by mocking the filesystem.



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