Github user vanzin commented on the issue:
https://github.com/apache/spark/pull/18253
> I change the Thread.sleep to a Thread.yield to be less agressive for the
thread unscheduling
How does that help? Now you have a thread that never sleeps. It gives up
its scheduler slot but is still active and will be scheduled again, even if it
doesn't need to.
Can you explain in numbers why exactly you're against any of the other
solutions that actually prevent these threads from being scheduled when not
needed?
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