X-Recipient:	archive-cygwin AT delorie DOT com
X-Original-To:	cygwin AT cygwin DOT com
Delivered-To:	cygwin AT cygwin DOT com
DMARC-Filter:	OpenDMARC Filter v1.3.2 sourceware.org C45223950437
Authentication-Results:	sourceware.org;
	dmarc=none (p=none dis=none) header.from=maxrnd.com
Authentication-Results:	sourceware.org; spf=none smtp.mailfrom=mark AT maxrnd DOT com
Subject:	Re: python > 3.5: Issue with unix domain sockets
To:	cygwin AT cygwin DOT com
References:	<1620046759893 DOT 5340 AT bmw DOT de>
	<2cde4128-6a3d-7431-6608-a2184d23964a AT cornell DOT edu>
From:	Mark Geisert <mark AT maxrnd DOT com>
Message-ID:	<af597ace-e986-35a0-9983-99256c440791@maxrnd.com>
Date:	Mon, 3 May 2021 21:41:35 -0700
User-Agent:	Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101
	Firefox/52.0 SeaMonkey/2.49.4
MIME-Version:	1.0
In-Reply-To:	<2cde4128-6a3d-7431-6608-a2184d23964a@cornell.edu>
X-Spam-Status:	No, score=-3.9 required=5.0 tests=BAYES_00, KAM_DMARC_STATUS,
	KAM_LAZY_DOMAIN_SECURITY, NICE_REPLY_A, SPF_HELO_NONE, SPF_NONE,
	TXREP autolearn=no autolearn_force=no version=3.4.2
X-Spam-Checker-Version:	SpamAssassin 3.4.2 (2018-09-13) on
	server2.sourceware.org
X-BeenThere:	cygwin AT cygwin DOT com
X-Mailman-Version:	2.1.29
List-Id:	General Cygwin discussions and problem reports <cygwin.cygwin.com>
List-Unsubscribe:	<https://cygwin.com/mailman/options/cygwin>,
	<mailto:cygwin-request AT cygwin DOT com?subject=unsubscribe>
List-Archive:	<https://cygwin.com/pipermail/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-request AT cygwin DOT com?subject=help>
List-Subscribe:	<https://cygwin.com/mailman/listinfo/cygwin>,
	<mailto:cygwin-request AT cygwin DOT com?subject=subscribe>
Errors-To:	cygwin-bounces AT cygwin DOT com
Sender:	"Cygwin" <cygwin-bounces AT cygwin DOT com>
X-MIME-Autoconverted:	from quoted-printable to 8bit by delorie.com id 1444fsmK002546

Ken Brown via Cygwin wrote:
> On 5/3/2021 8:57 AM, Maximilian.Blenk--- via Cygwin wrote:
>> Incorrect Behavior:
>> Server:
>> $ python3.7 server.py
>> starting up on ./uds_socket
>> waiting for a connection
>> Traceback (most recent call last):
>>    File "server.py", line 27, in <module>
>>      connection, client_address = sock.accept()
>>    File "/usr/lib/python3.7/socket.py", line 214, in accept
>>      sock = socket(self.family, self.type, self.proto, fileno=fd)
>>    File "/usr/lib/python3.7/socket.py", line 151, in __init__
>>      _socket.socket.__init__(self, family, type, proto, fileno)
>> SystemError: <slot wrapper '__init__' of '_socket.socket' objects> returned NULL 
>> without setting an error
>>
>> Client:
>> $ python3.7 client.py
>> connecting to ./uds_socket
>> sending b'This is the message.  It will be repeated.'
>> closing socket
>> Traceback (most recent call last):
>>    File "client.py", line 27, in <module>
>>      data = sock.recv(16)
>> ConnectionResetError: [Errno 104] Connection reset by peer
> 
> I wonder if this has the same cause as the problem reported here:
> 
>    https://cygwin.com/pipermail/cygwin/2021-February/247884.html
> 
> Mark, can you check that?

Hmm, the correlation between failing Python versions and patch placements is 
troubling.  I've reproduced the OP's findings and will dig further.

..mark

-- 
Problem reports:      https://cygwin.com/problems.html
FAQ:                  https://cygwin.com/faq/
Documentation:        https://cygwin.com/docs.html
Unsubscribe info:     https://cygwin.com/ml/#unsubscribe-simple

- Raw text -