Github user tillrohrmann commented on the issue:
https://github.com/apache/flink/pull/4916
Thanks a lot for your review @StephanEwen and @sihuazhou. I've addressed
all your comments @StephanEwen.
Next thing I'll do is to rebase onto the latest master and if Travis gives
green light and you have no further objections, then I would like to merge it.---
