Github user andrewor14 commented on the pull request:
https://github.com/apache/spark/pull/7532#issuecomment-126816568
@vanzin I just looked at the code again and there doesn't seem to be a
great way to separate it out. This is because, in the "one executor per worker"
case, we actually need to keep scheduling cores on the existing executors even
when we're already at the limit. E.g. if the limit is 3 and we have already
scheduled 1 core on each worker (1, 1, 1), we should keep scheduling even
though we already "have" 3 executors.
Instead, I updated the comment and variable placement to make this easier
to read.
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