Github user liujianhuiouc commented on the issue:
https://github.com/apache/spark/pull/16456
in actual scene, it's only one executor's director for an app, does you
mean that delete the child directories in parallel? in my opinion, it's
unnecessary to delete that in parallel, could be deleted in future, to avoid
other message to block the heartbeat, does it right to send heartbeat in
another thread?
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