Github user sachingoel0101 commented on the pull request:
https://github.com/apache/flink/pull/1031#issuecomment-132927894
Ah yes, you're right. We cannot use `clearSinks`.
To answer the second part, the folder will still be added. It is only at
runtime that all the directories and files inside a folder are recursively
copied. So, just adding the folder once should work.
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