Thomas Moreau a5cbab552d bpo-39104: Fix hanging ProcessPoolExecutor on shutdown nowait with pickling failure (GH-17670) ... As reported initially by @rad-pat in #6084, the following script causes a deadlock. ``` from concurrent.futures import ProcessPoolExecutor class ObjectWithPickleError(): """Triggers a RuntimeError when sending job to the workers""" def __reduce__(self): raise RuntimeError() if __name__ == "__main__": e = ProcessPoolExecutor() f = e.submit(id, ObjectWithPickleError()) e.shutdown(wait=False) f.result() # Deadlock on get ``` This is caused by the fact that the main process is closing communication channels that might be necessary to the `queue_management_thread` later. To avoid this, this PR let the `queue_management_thread` manage all the closing. https://bugs.python.org/issue39104 Automerge-Triggered-By: @pitrou		2020-02-16 10:09:26 -08:00
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futures	bpo-39104: Fix hanging ProcessPoolExecutor on shutdown nowait with pickling failure (GH-17670)	2020-02-16 10:09:26 -08:00
__init__.py	Initial implementation of PEP 3148	2010-09-18 22:35:02 +00:00