[issue39557] ThreadPoolExecutor is busy-waiting when idle.

[Mark Dickinson]

Mark Dickinson <dickinsm at gmail.com> added the comment:

It would also be helpful to know which platform you're observing the 100% CPU usage on, so that we can try to reproduce.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39557>
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