Github user NicoK commented on the issue:
https://github.com/apache/flink/pull/4533
ok, I fiddled with my remarks a bit and you are right for the problems of
reducing the visibility, which is partly caused by the
`CreditBasedClientHandler` not replacing `PartitionRequestClientHandler` yet.
I'll send you my suggestions offline (as I can't attach them here) and they
should fix all my last remarks.---
