Github user vanzin commented on the issue:
https://github.com/apache/spark/pull/16603
> The consumer which asks more memory will decide it fails or not after
this memory acquirement
Yeah, but at that point, you've already spilled a bunch of other consumers
just to find out you don't have enough memory... so it's a pretty expensive
failure. But probably not a big deal, hope it doesn't happen often.
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