Github user vanzin commented on the pull request:
https://github.com/apache/spark/pull/7532#issuecomment-126839386
> in the "one executor per worker" case, we actually need to keep
scheduling cores
I'm not sure I completely understand all the code here, but it seems to me
like this case would be covered by just ignoring the requested number of cores
in the "one executor per worker" case, and requesting as many cores as the
worker has available.
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