Github user ggevay commented on the pull request:
https://github.com/apache/flink/pull/684#issuecomment-195402038
This is dead. Everything has totally changed that this was based on. The
fundamental problem is that this is based on the assumption of the old 0.9
windowing code that events come ordered by time. The idea was to update the
median incrementally when the current window changes, but the new windowing
code is building several windows at the same time instead of windows gradually
changing into each other, so I don't think that this idea could be adapted to
the current version.
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