Github user vanzin commented on the pull request:
https://github.com/apache/spark/pull/7756#issuecomment-126102243
I'm not sure `CoarseGrainedSchedulerBackend::stop()` needs to call
`stopExecutors()` (they'll die or be killed by the cluster manager), which is
the underlying reason for the exception... but I guess this is safer. Not
pretty, but safer.
I'd write a more descriptive description (referring to a mailing list
e-mail is not very helpful), but other than that, LGTM.
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