[Windows] : Proactor test_sendfile_close_peer_in_the_middle_of_receiving failure

[aeros]

BPO	41682
Nosy	@gvanrossum, @terryjreedy, @ncoghlan, @vstinner, @asvetlov, @1st1, @miss-islington, @sweeneyde, @aeros, @erlend-aasland, @sobolevn, @Fidget-Spinner, @kumaraditya303, @arhadthedev
PRs	bpo-41682: skip test_sendfile_close_peer_in_the_middle_of_receiving in test_asyncio #30801 [3.9] bpo-41682: Skip unstable test_asyncio sendfile test on Windows (GH-30801) #30811 [3.10] bpo-41682: Skip unstable test_asyncio sendfile test on Windows (GH-30801) #30812 bpo-45382: test.pythoninfo logs more Windows versions #30817 bpo-41682: fixed flaky test test_sendfile_close_peer_in_the_middle_of_receiving #30845 [3.10] bpo-41682: fixed flaky test test_sendfile_close_peer_in_the_middle_of_receiving (GH-30845) #30860 [3.9] bpo-41682: fixed flaky test test_sendfile_close_peer_in_the_middle_of_receiving (GH-30845) #30861

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2022-01-25.17:41:06.264>
created_at = <Date 2020-09-01.01:20:55.485>
labels = ['type-bug', '3.10', '3.11', 'tests', 'OS-windows', 'expert-asyncio']
title = '[Windows] : Proactor test_sendfile_close_peer_in_the_middle_of_receiving failure'
updated_at = <Date 2022-01-25.18:03:17.384>
user = 'https://github.com/aeros'

bugs.python.org fields:

activity = <Date 2022-01-25.18:03:17.384>
actor = 'vstinner'
assignee = 'none'
closed = True
closed_date = <Date 2022-01-25.17:41:06.264>
closer = 'vstinner'
components = ['Tests', 'Windows', 'asyncio']
creation = <Date 2020-09-01.01:20:55.485>
creator = 'aeros'
dependencies = []
files = []
hgrepos = []
issue_num = 41682
keywords = ['patch']
message_count = 23.0
messages = ['376175', '376176', '391134', '392061', '396238', '396503', '399770', '402294', '404820', '408612', '411293', '411299', '411313', '411322', '411386', '411508', '411638', '411639', '411640', '411641', '411643', '411646', '411651']
nosy_count = 14.0
nosy_names = ['gvanrossum', 'terry.reedy', 'ncoghlan', 'vstinner', 'asvetlov', 'yselivanov', 'miss-islington', 'Dennis Sweeney', 'aeros', 'erlendaasland', 'sobolevn', 'kj', 'kumaraditya', 'arhadthedev']
pr_nums = ['30801', '30811', '30812', '30817', '30845', '30860', '30861']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue41682'
versions = ['Python 3.10', 'Python 3.11']

[aeros]

In an unrelated PR to add a new argument to the base Executor class for concurrent.futures, there was a test_asyncio failure in test_sendfile for the ProactorEventLoop tests:

======================================================================
FAIL: test_sendfile_close_peer_in_the_middle_of_receiving (test.test_asyncio.test_sendfile.ProactorEventLoopTests)
----------------------------------------------------------------------

Traceback (most recent call last):
 File "D:\a\cpython\cpython\lib\test\test_asyncio\test_sendfile.py", line 452, in test_sendfile_close_peer_in_the_middle_of_receiving
 self.run_loop(
AssertionError: ConnectionError not raised

---

https://github.com/python/cpython/pull/22023/checks?check_run_id=1049760805#step:5:2373

[aeros]

In case the link to the logs are lost from closing and reopening the PR, it was a Windows CI test (GitHub actions) ran with the following configuration:

D:\a\cpython\cpython>"D:\a\cpython\cpython\PCbuild\amd64\python.exe" -u -Wd -E -bb -m test -uall -u-cpu -rwW --slowest --timeout 1200 -j0
== CPython 3.10.0a0 (remotes/pull/22023/merge:992cc27, Aug 31 2020, 06:11:21) [MSC v.1927 64 bit (AMD64)]
== Windows-10-10.0.17763-SP0 little-endian
== cwd: D:\a\cpython\cpython\build\test_python_6372�
== CPU count: 2
== encodings: locale=cp1252, FS=utf-8
Using random seed 491155
0:00:00 Run tests in parallel using 4 child processes (timeout: 20 min, worker timeout: 25 min)

[vstinner]

I marked bpo-42124 and bpo-43539 as a duplicate of this issue.