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gh-101225: Increase the socket backlog when creating a multiprocessing.connection.Listener (#113567)

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Increase the backlog for multiprocessing.connection.Listener` objects created
 by `multiprocessing.manager` and `multiprocessing.resource_sharer` to
 significantly reduce the risk of getting a connection refused error when creating
 a `multiprocessing.connection.Connection` to them.
This commit is contained in:
Ronald Oussoren 2024-01-13 10:48:33 +01:00 • committed by GitHub
parent 21f83efd10
commit c7d59bd8cf
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3 changed files with 6 additions and 2 deletions
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Lib/multiprocessing/resource_sharer.py
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@ -123,7 +123,7 @@ class _ResourceSharer(object):
from .connection import Listener
assert self._listener is None, "Already have Listener"
util.debug('starting listener and thread for sending handles')
self._listener = Listener(authkey=process.current_process().authkey)
self._listener = Listener(authkey=process.current_process().authkey, backlog=128)
self._address = self._listener.address
t = threading.Thread(target=self._serve)
t.daemon = True