Github user ijokarumawak commented on the issue:
https://github.com/apache/nifi/pull/1497
@ottobackwards Reviewed the changes. Confirmed that both test runs
successfully even if there's a .DS_Store file in the test input directory. +1
Please note that when you submit a PR for a JIRA, push the "submit patch"
button to move JIRA status forward to "Patch Available". This ensure other
developers to know it's ready for PR.

https://cwiki.apache.org/confluence/display/NIFI/Contributor+Guide#ContributorGuide-CodeReviewProcess
I'm going to merge this. Thank you for you contributing!
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