From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from conssluserg-01.nifty.com (conssluserg-01.nifty.com [210.131.2.80]) by sourceware.org (Postfix) with ESMTPS id 744083857404 for ; Fri, 25 Mar 2022 05:43:16 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 744083857404 Authentication-Results: sourceware.org; dmarc=fail (p=none dis=none) header.from=nifty.ne.jp Authentication-Results: sourceware.org; spf=fail smtp.mailfrom=nifty.ne.jp Received: from Express5800-S70 (ak044095.dynamic.ppp.asahi-net.or.jp [119.150.44.95]) (authenticated) by conssluserg-01.nifty.com with ESMTP id 22P5ghch018345; Fri, 25 Mar 2022 14:42:43 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conssluserg-01.nifty.com 22P5ghch018345 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.ne.jp; s=dec2015msa; t=1648186963; bh=lLNwbkpW9pMkwtqDaQrYCxDVKUtP1Jv9HjgPobCy82g=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=Iwcw7CnN1DHjpFfm/5SWh91SW+mhoTxFaIoSbLR3RpGqwATR0gppB8OYhNT/5xbw8 lo2/dzIHF1nSWTnz44IqFh8bHqgMoK599K9lZYknG2MBryBDw8hReY0kJfKnD+j92h TS2GeARLlnaPF3AA1ATugVoA7K2tpuJX3HrKu4m+wzmNcrv4fTC3s/XLGDPJ4Zupw+ igzlkTSsSsDuYYmC1ZjK59ZDzx5Ag4J5UlL+C23t71jfeyIpzqdQLcOR88lQ3QWkgu xQ5bL+uGNKynnBlQoqcZTDmVoEdKwTG2J5JHMK4tWNc20sBX9AbK6N6d/QJJSvcDi3 r6SLCB77HtMvQ== X-Nifty-SrcIP: [119.150.44.95] Date: Fri, 25 Mar 2022 14:42:53 +0900 From: Takashi Yano To: cygwin@cygwin.com Cc: Jeremy Drake Subject: Re: pipe hang issue when running as SYSTEM Message-Id: <20220325144253.4053d19d7e7b0243dcefa79e@nifty.ne.jp> In-Reply-To: References: <20220322191807.8348f074683c127b1723c5c2@nifty.ne.jp> <20220322221756.2b7e80ec0a51e7ebd9df5a53@nifty.ne.jp> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.30; i686-pc-mingw32) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, NICE_REPLY_A, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: cygwin@cygwin.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: General Cygwin discussions and problem reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 25 Mar 2022 05:43:20 -0000 On Thu, 24 Mar 2022 20:42:50 -0700 (PDT) Jeremy Drake wrote: > On Tue, 22 Mar 2022, Takashi Yano wrote: > > > > Thanks for the report. This is expected problem as mentioned > > > in b531d6b commit message. However, I could not imagin the > > > situation that the service has multiple writer for the pipe > > > and one of them is a non-cygwin app. > > > > > > Question is: Does the docker invoke the command using SYSTEM > > > account? Or is the processes in docker determined as running > > > as a service? > > > > I confirmed the processes in Windows docker are running as > > well_known_service_sid. Let me consider a while. > > > > Just got another report to MSYS2 of this behavior, this time from a Gitlab > CI runner that is running as a service and trying to pipe output from > Microsoft cl.exe while running configure. This user reports that 3.3.4 > with your "[PATCH v2] Cygwin: pipe: Avoid deadlock for non-cygwin writer." > applied to it does not solve the problem. > > https://github.com/msys2/MSYS2-packages/issues/2893 I can confirm the sample script hangs indeed if the script is running as SYSTEM account. However, in my test, the patch solves the issue. It would be very helpfull if a simple github repository with github actions, which can reproduce the issue, is provided. -- Takashi Yano