Github user uce commented on the pull request: https://github.com/apache/flink/pull/1640#issuecomment-184284513 Great addition. But in my personal opinion it's not a good idea to name the sink exactly once when you say: *Note that a job failure while the data is being committed will cause duplicate data to be committed, but the chance of this happening is much smaller than for a naive At-Least-once implementation.* What do others sink (I'll leave this typo... :smile:)?
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