X-Recipient:	archive-cygwin AT delorie DOT com
DKIM-Filter:	OpenDKIM Filter v2.11.0 sourceware.org 710DA388702C
DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=cygwin.com;
	s=default; t=1586275285;
	bh=cC4my3mYYNxU4hEo6zVaE61gBsagyj1CCffiiBBTSOM=;
	h=Subject:To:References:Date:In-Reply-To:List-Id:List-Unsubscribe:
	List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:
	From;
	b=ETsOAL2jkDlAw0lOhWiNF2Fy01fVpIZ7Syj5uMD5isasx0XlgUS3yk2853OeVj8xE
	yvlgXFM00pb1RQdQnvi0CPD3emErlTLy+2V+qXHOf//rdCci3OG6PYUT8TEtRj2SyP
	5B/4UXsGufFi566i6nCQUaVhsSS+ma+v4+a3NClk=
X-Original-To:	cygwin AT cygwin DOT com
Delivered-To:	cygwin AT cygwin DOT com
DMARC-Filter:	OpenDMARC Filter v1.3.2 sourceware.org 583B8385DC1A
ARC-Seal:	i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none;
	b=N4gG5OYkRMMvXkPgRHAhaZiHMq9xUXaGrI2gR/YVq0poQkwgV7a6elQ+U4HL2u+myyRjw4ytttM/2Lse5T8kt3jzMvbjyn9N9WHloaUgWIEHLBKogGpAI/+xSkbT6Dq7YGMolbyvOYAmnW1QP0WMsCPJxUtq/Jh/HGhLXmlnUGgMGxTARSq71gqLGODcP7DvTJMIZNlBXKUKtE7T96/svZZQS+1L6KVBMJ6nFoC36c1lokjG1rievVNOnxStXcHp92mkbq2oLlHwxyI3zmQiPMmkR/C5U01DAiSoTiUIiRGbpb63umshBiJCdfF6izl97Ye/qS1mGtWB2mWvLn+Q+g==
ARC-Message-Signature:	i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com;
	s=arcselector9901;
	h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;
	bh=9qEcbsnTm9K52N+phYl+Lf2a6Ha2K6TgvKue3aKr6ZE=;
	b=aj37K3a0/R33Nslvj5dLlnCbX0M5AoY9okiM5wxhwoeilCqx2WBAkBW2Y13v2/Ws7vOb/7Kcdnm7BkrVdr7p3s2cAlI0tqlaKigo569qdG53KOG+ocZYwFJp8l0LXpZHmSgDwDaX4KZpJh6SNXsnx0yrC78SYCUb/Eiw41Lne0f5ZkVGhUnsXAmdkTjgTn+S5fPK1KWjM5TLEzMLKAOjhvvw0kOvJ67mMnClozA1dQmYMpgF9/JZdLkjKJEm2LlJ8+snrIr4LKfLuiKOXbMKmUDfYQLaFh1HmenvJydzFX4mI0QQUkJgXDHh7qHzRos5Y68ptttevAiuFFfqPXmN1Q==
ARC-Authentication-Results:	i=1; mx.microsoft.com 1; spf=pass
	smtp.mailfrom=cornell.edu; dmarc=pass action=none header.from=cornell.edu;
	dkim=pass header.d=cornell.edu; arc=none
Subject:	Re: open descriptor to named pipes sometimes fail
To:	cygwin AT cygwin DOT com
References:	<000701d60cee$ab67e1b0$0237a510$@gmail.com>
Message-ID:	<8c868142-2a9b-3644-0760-444125d2143f@cornell.edu>
Date:	Tue, 7 Apr 2020 12:01:19 -0400
User-Agent:	Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101
	Thunderbird/68.6.0
In-Reply-To:	<000701d60cee$ab67e1b0$0237a510$@gmail.com>
X-ClientProxiedBy:	MN2PR05CA0037.namprd05.prod.outlook.com
	(2603:10b6:208:236::6) To DM6PR04MB6075.namprd04.prod.outlook.com
	(2603:10b6:5:127::31)
MIME-Version:	1.0
X-MS-Exchange-MessageSentRepresentingType:	1
X-Originating-IP:	[2604:6000:b407:7f00:951a:422:1ecd:ad57]
X-MS-PublicTrafficType:	Email
X-MS-Office365-Filtering-Correlation-Id:	6823e753-2e97-4aa9-aaf7-08d7db0cea2c
X-MS-TrafficTypeDiagnostic:	DM6PR04MB7065:
X-Microsoft-Antispam-PRVS:	<DM6PR04MB70654064B624700A079A20DED8C30 AT DM6PR04MB7065 DOT namprd04 DOT prod DOT outlook DOT com>
X-MS-Oob-TLC-OOBClassifiers:	OLM:4941;
X-Forefront-PRVS:	036614DD9C
X-Forefront-Antispam-Report:	CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:;
	IPV:NLI; SFV:NSPM; H:DM6PR04MB6075.namprd04.prod.outlook.com; PTR:; CAT:NONE;
	SFTY:;
	SFS:(10019020)(4636009)(136003)(376002)(366004)(346002)(396003)(39860400002)(8676002)(86362001)(478600001)(6916009)(81166006)(31696002)(16526019)(5660300002)(186003)(2906002)(81156014)(75432002)(31686004)(786003)(6486002)(8936002)(4744005)(66556008)(36756003)(66476007)(52116002)(2616005)(53546011)(66946007)(316002);
	DIR:OUT; SFP:1102;
Received-SPF:	None (protection.outlook.com: cornell.edu does not designate
	permitted sender hosts)
X-MS-Exchange-SenderADCheck:	1
X-Microsoft-Antispam:	BCL:0;
X-Microsoft-Antispam-Message-Info:	517rRD7GvWOIvf7zqIO7AHgLtp1ytmphQb1vdrw4z3j6B1L4yK0n+tb56yBcJkuNe7AMM6OKCNpFQ+P5JrYOAWv8QKmt60fXXyeYBRneN883IDCtEkYAYf9qUMwWEeRw8kSXgxglqdwTor226J83QFAZjqiQ5NnFQPTsFvziBDI+l/+j5WmkUwVFZpy5zXUsnEzEwpLqCJziK0/ANGfqk4bLXxInud1pvfL/QO8on0VR4kKijHEvqHu0LCOhkizuql+ASstMq0dlud4Voewx7vkEtdR9vwHu63d0b1ylem+NfkfQRr/pj/5JFv96TkHztqFJwIlUhIfecgIfbJgX7K5scwZDaE3HnZXEKKrDGdGmVZKYHcJaHEX/YP3pqwwmVxgjCutZBlmzH8RyBi+8Ymsh5M3dHJCOwo+rLFPVmg1VcjAYzJ98oTbZfwMYrXy0
X-MS-Exchange-AntiSpam-MessageData:	SxA+Xk1jGfCW9e4qGXPdZb1Th5ZooZEUufyjm9f7DDpXsslx8ULZSqEewbYS6nss688vAa/cWLRHGB3IGFCECjIkPPYCPtgFrz+zxOH0QGyAYUqjtLb2XHJXmDwMh6TsgLALbHq/mXq4uJlV8cUlP/9cLC7XntNX2iFT49JmySLt1DGEVyiP4689jQ8yIMqnsDjeWG8Dc4dTxAiUguTvAg==
X-OriginatorOrg:	cornell.edu
X-MS-Exchange-CrossTenant-Network-Message-Id:	6823e753-2e97-4aa9-aaf7-08d7db0cea2c
X-MS-Exchange-CrossTenant-OriginalArrivalTime:	07 Apr 2020 16:01:21.3099 (UTC)
X-MS-Exchange-CrossTenant-FromEntityHeader:	Hosted
X-MS-Exchange-CrossTenant-Id:	5d7e4366-1b9b-45cf-8e79-b14b27df46e1
X-MS-Exchange-CrossTenant-MailboxType:	HOSTED
X-MS-Exchange-CrossTenant-UserPrincipalName:	9kcTkqtqGcls1xOSJW/ekOmQVjiLqjX0f9+TIRT6mJwFWrReI0PecB91Z69Y9rDHsmHC76enb0LfcSb0RC+wEw==
X-MS-Exchange-Transport-CrossTenantHeadersStamped:	DM6PR04MB7065
X-Spam-Status:	No, score=-2.0 required=5.0 tests=BAYES_00, DKIM_SIGNED,
	DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, MSGID_FROM_MTA_HEADER,
	RCVD_IN_DNSWL_NONE, SPF_HELO_PASS, SPF_PASS,
	TXREP autolearn=ham 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:	<http://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:	<http://cygwin.com/mailman/listinfo/cygwin>,
	<mailto:cygwin-request AT cygwin DOT com?subject=subscribe>
From:	Ken Brown via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Ken Brown <kbrown AT cornell DOT edu>
Errors-To:	cygwin-bounces AT cygwin DOT com
Sender:	"Cygwin" <cygwin-bounces AT cygwin DOT com>

On 4/7/2020 11:10 AM, Kristian Ivarsson via Cygwin wrote:
> Opening a (second) descriptor for (blocking) write sometimes fail
> 
> The provided test case sometimes succeed, but quite often fail with ENOENT
> (in various indexes)
> 
> I haven't dug deeper to find the underlaying cause yet
> 
> Have anyone experienced this before ?

I can't reproduce this on my system.  I changed 1000 to 10000 and then ran your 
test case 10 times, and it never failed.  I tested both cygwin-3.1.4 and the 
HEAD of the topic/fifo branch (which I recently force-pushed in case you want to 
try it).

Can you run your test under strace and see if that provides a clue?

Ken
--
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 -