Github user tillrohrmann commented on the issue:
https://github.com/apache/flink/pull/2754
Really good changes @StephanEwen. With the safeguard against spilling too
much data while aligning the checkpoint barriers Flink will be more robust and
deliver a better user experience in large scale situations.
I think the code is in a really good shape and the changes are well tested.
Thus +1 for merging.
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