New submission from cherusk <matthias.tafelme...@gmx.net>:
>From PR:
Following script stals/hangs. According to my tracing done, in the smtpd
component. The concept of the script is baseline of my unit testing for [1], so
not hypothetical:
import logging
import sys
logging.basicConfig(level=logging.DEBUG, stream=sys.stdout)
from smtpd import DebuggingServer as TestMailServer
import threading
from notifiers import get_notifier
import time
import itertools as it
mail_server = threading.Thread(target=TestMailServer, args=(("localhost",
2500), None))
mail_server.daemon = True
mail_server.start()
time.sleep(2)
for msg in it.repeat('copy', 100):
print(msg)
get_notifier('email').notify(from_='cherusk@localhost',
to='root@localhost',
message=msg,
subject='TST',
host='localhost',
port=2500,
tls=False,
ssl=False,
html=False,
username="some",
password='pw'
)
I evaluated that on several platforms(FED29, UBUNTU-Latest), same symptoms.
Also, on network stack I saw a clean TCP handshake happening, also cleanly
ACKed by the smptd. So, presumption is that it's something in the dispatcher.
[1]
https://github.com/cherusk/tw_timeliness/blob/master/test/time_engine_test.py
----------
components: email
messages: 348752
nosy: barry, cherusk, r.david.murray
priority: normal
pull_requests: 14785
severity: normal
status: open
title: smtpd: staling connect
type: behavior
versions: Python 3.7
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue37721>
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