Github user shijinkui commented on the issue:
https://github.com/apache/flink/pull/3190
> I would actually prefer to fix the tests, rather than re-assignign the
temp directory. All tests should use a random subdirectory in the temp
directory. It is quite convenient to do via JUnit:
@StephanEwen That make sense. Have tmp file util in flink-test-utils-junit.
@zentol @fhueske added maven-antrun-plugin for pre-create tmp directory.
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