STINNER Victor <vstin...@python.org> added the comment:
> See also bpo-30966 "Add multiprocessing.SimpleQueue.close()".
I pushed a commit 1a275013d1ecc2e3778d64fda86174b2f13d6969:
"Process.shutdown(wait=True) of concurrent.futures now closes
explicitly the result queue."
test_shutdown_deadlock_pickle() still rely on the queue to be closed
implicitly. Queue created at:
(...)
File "/home/vstinner/python/master/Lib/test/test_concurrent_futures.py",
lineno 1196
with self.executor_type(max_workers=2,
File "/home/vstinner/python/master/Lib/concurrent/futures/process.py", lineno
637
self._result_queue = mp_context.SimpleQueue()
File "/home/vstinner/python/master/Lib/multiprocessing/context.py", lineno 113
return SimpleQueue(ctx=self.get_context())
File "/home/vstinner/python/master/Lib/multiprocessing/queues.py", lineno 341
self._reader, self._writer = connection.Pipe(duplex=False)
File "/home/vstinner/python/master/Lib/multiprocessing/connection.py", lineno
539
c2 = Connection(fd2, readable=False)
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<https://bugs.python.org/issue39995>
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