Github user revans2 commented on the pull request: https://github.com/apache/storm/pull/1131#issuecomment-189004616 I agree that we need to keep track of outstanding tuples + offsets, and the code you have around acked feels OK, but we could possibly clean it up a little. I called it markAsDone instead of addAckedTuples because I didn't really like having a tuple that failed too many times be marked as acked, but thinking about it more it is not that big of a deal.
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