Github user StephanEwen commented on the pull request:
https://github.com/apache/flink/pull/887#issuecomment-119137396
I think all in all, this looks good.
We have another change by @mxm pending that changes the accumulators to do
live updates during runtime. Since @mxm's change is more invasive, I would
suggest that we wait for it to be merged before merging this one.
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