Github user StephanEwen commented on the issue:
https://github.com/apache/flink/pull/3311
Cool change, good to merge from my side.
As an optional thought: We could probably expose a lightweight `Scheduler`
interface rather than the `ScheduledExecutorService`, given that quite some
methods are not available. That `Scheduler` interface might be easier to wrap
around akka's scheduler as well.
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