gh-109934: notify cancelled futures on thread pool shutdown #134618
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When `ThreadPoolExecutor` shuts down it cancels any pending futures, however at present it doesn't notify waiters. Thus their state stays as `CANCELLED` instead of `CANCELLED_AND_NOTIFIED` and any waiters are not awakened. Call `set_running_or_notify_cancel` on the cancelled futures to fix this.
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When
ThreadPoolExecutorshuts down it cancels any pending futures, however at present it doesn't notify waiters. Thus their state stays asCANCELLEDinstead ofCANCELLED_AND_NOTIFIEDand any waiters are not awakened.Call
set_running_or_notify_cancelon the cancelled futures to fix this.