Github user jerryshao commented on the issue:
https://github.com/apache/spark/pull/19303
IIUC, if there's no core left, requesting new executors should be a no-op,
am I right? So there should be no problem even without your fix?
From your patch, it looks like you're putting standalone specific logic to
this general `ExecutorAllocationManager`, personally I would suggest not to do
it.
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