From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: Persistent failure to lookup hostname Date: Tue, 04 Oct 2022 10:00:25 -0400 Message-ID: References: <83mtacw073.fsf@gnu.org> <83lepvvgnm.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="14807"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) Cc: emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Tue Oct 04 16:38:36 2022 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1ofj47-0003gY-T6 for ged-emacs-devel@m.gmane-mx.org; Tue, 04 Oct 2022 16:38:35 +0200 Original-Received: from localhost ([::1]:51988 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ofj45-0002mn-RH for ged-emacs-devel@m.gmane-mx.org; Tue, 04 Oct 2022 10:38:33 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:42686) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ofiTK-0007Dm-2F for emacs-devel@gnu.org; Tue, 04 Oct 2022 10:00:38 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:46323) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ofiTG-0002L9-MR; Tue, 04 Oct 2022 10:00:32 -0400 Original-Received: from pmg1.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id AADD11002D5; Tue, 4 Oct 2022 10:00:28 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id 16A9E1000D0; Tue, 4 Oct 2022 10:00:27 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1664892027; bh=iwFFsely/0Wa7Io0J0V1+MIB1thrwQanl2tdXLENaaQ=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=GTBVox870+i7w5Cbyan+oemnQeQoaezgbvgFRRLxQ5yXdFM3OcLfxeMz04c4Md0lR XcKGhcnFS+9wCO1etR0CXrekDg7IPBaB/qrnh89iG8Bas4F/i5kWLIomBHSBZ0SwBd /BPSav+0/p2vXVU/DOg6GhMsuIIh4TpIauGJFXdDRMgFvsRCjoAphnLVea6RdHbUY+ 4CtNXeU+bTNTcLLQw5e5kUSveLQRl0/695WBh98sffmRdoljmAJQ9RJ3pBDkoZ7FqZ t+XuQwqVbLSsNjYbmhCmvUz4cJd3j/Eq4oonOYiNHVrp6ukTrZwviY87sbS8gZSXMD 08SuK3JfnkVew== Original-Received: from pastel (65-110-220-202.cpe.pppoe.ca [65.110.220.202]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id E2CF5120206; Tue, 4 Oct 2022 10:00:26 -0400 (EDT) In-Reply-To: <83lepvvgnm.fsf@gnu.org> (Eli Zaretskii's message of "Tue, 04 Oct 2022 16:53:49 +0300") Received-SPF: pass client-ip=132.204.25.50; envelope-from=monnier@iro.umontreal.ca; helo=mailscanner.iro.umontreal.ca X-Spam_score_int: -42 X-Spam_score: -4.3 X-Spam_bar: ---- X-Spam_report: (-4.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:296886 Archived-At: >> No. But it's certain that it's not system-wide because all the other >> processes (including a fresh new Emacs session, and an older Emacs >> session that rarely/never uses network connections) I tried had no >> problem resolving that same address. > You are saying that the affected Emacs session cannot use eww or any > of the url code to access sites (or just that IMAP site)? That's a good question, I should check that as well next time, indeed, thanks. [ Not sure why it didn't occur to me back then. Apparently I was looking for ways to get my IMAP connection working more than for ways to diagnose the problem. ] >> > Did you try flushing and renewing the system's DNS cache with the >> > appropriate shell commands? >> I don't know that I have such a thing on this system. > Could be. Maybe the next links will help: > > https://devconnected.com/how-to-flush-dns-cache-on-linux/ > https://beebom.com/how-flush-dns-cache-linux/ > https://linuxize.com/post/how-to-clear-the-dns-cache/ I did check for `nscd` and I know it's not running `dnsmasq` any more no that machine (I know because I used to run it), but I haven't checked `systemd-resolved` yet. Thanks. Stefan