Github user andrewor14 commented on the pull request:
https://github.com/apache/spark/pull/4168#issuecomment-73625504
@sryza I may be missing something but I don't understand why
`numPendingExecutors` should be rederived from the user calling
`requestTotalExecutors` every time. What exactly was the issue with
decrementing it as we did before? Also I believe the current code is incorrect
because the user (or us internally) may call either `requestExecutor` or
`requestTotalExecutors`, and now we only reset it for the latter. If we were to
do this we should do it in `doRequestTotalExecutors` instead.
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