[3.11] gh-107219: Fix concurrent.futures terminate_broken() (GH-109244) #109255
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…109244) Fix a race condition in concurrent.futures. When a process in the process pool was terminated abruptly (while the future was running or pending), close the connection write end. If the call queue is blocked on sending bytes to a worker process, closing the connection write end interrupts the send, so the queue can be closed. Changes: * _ExecutorManagerThread.terminate_broken() now closes call_queue._writer. * multiprocessing PipeConnection.close() now interrupts WaitForMultipleObjects() in _send_bytes() by cancelling the overlapped operation. (cherry picked from commit a9b1f84) Co-authored-by: Victor Stinner <[email protected]>
This was referenced Sep 11, 2023
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Fix a race condition in concurrent.futures. When a process in the
process pool was terminated abruptly (while the future was running or
pending), close the connection write end. If the call queue is
blocked on sending bytes to a worker process, closing the connection
write end interrupts the send, so the queue can be closed.
Changes:
call_queue._writer.
WaitForMultipleObjects() in _send_bytes() by cancelling the
overlapped operation.
(cherry picked from commit a9b1f84)
Co-authored-by: Victor Stinner [email protected]