Github user steveloughran commented on the issue:
https://github.com/apache/spark/pull/7786
> But I'm just trying to point out that the current change doesn't really
make things better. Without killing the executor, you'll still be holding on to
resources, except now you wouldn't be using them. So might as well keep using
them for as long as you can, or give them back as soon as possible (i.e. as
soon as the executor becomes idle).
I agree. Doing a clean shutdown and release is probably what the schedulers
prefer âespecially if it starts up the pre-empting code faster
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