From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9B36DCD8C9D for ; Mon, 8 Jun 2026 14:49:32 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1wWbHk-0006m5-FU; Mon, 08 Jun 2026 10:49:04 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wWbHJ-0006Wa-EM for qemu-devel@nongnu.org; Mon, 08 Jun 2026 10:48:42 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wWbHH-00055P-J1 for qemu-devel@nongnu.org; Mon, 08 Jun 2026 10:48:36 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1780930114; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:in-reply-to:in-reply-to: references:references; bh=GYEaOEnVygtlFeRLbvCP5EiEYwlr1ShSg6WtKbZF1cU=; b=Ulvgs/+r/0cWynM6k1J3IPDKslI2Nlk2NxQkxDX5RRLECmrF2d7iJcBH2MPYVPGhJaQOrL ooFh5PWLtMYnVvyM9axGurdcAMMdki3IfztZlchk4oxLQA9xXvTgx5MeOGZHiZdtYVdXRC cDquJdN6hZyWm/Zpl8htRHEQ8Irkr8E= Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-629-LjlPKQNAPk6hyawUrwVMoQ-1; Mon, 08 Jun 2026 10:48:26 -0400 X-MC-Unique: LjlPKQNAPk6hyawUrwVMoQ-1 X-Mimecast-MFC-AGG-ID: LjlPKQNAPk6hyawUrwVMoQ_1780930105 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 3C202195605E; Mon, 8 Jun 2026 14:48:25 +0000 (UTC) Received: from redhat.com (unknown [10.44.49.219]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id CD10919541B0; Mon, 8 Jun 2026 14:48:22 +0000 (UTC) Date: Mon, 8 Jun 2026 15:48:19 +0100 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: Stefan Hajnoczi Cc: Vladimir Sementsov-Ogievskiy , qemu-devel , Eric Blake , Kevin Wolf , qemu block Subject: Re: Race condition in qemu-iotests nbd 205? Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/2.3.2 (2026-04-26) X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Received-SPF: pass client-ip=170.10.129.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: 8 X-Spam_score: 0.8 X-Spam_bar: / X-Spam_report: (0.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.445, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_SBL_CSS=3.335, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Mon, Jun 08, 2026 at 10:23:18AM -0400, Stefan Hajnoczi wrote: > Hi Vladimir, > It looks like there is a race condition in qemu-iotests 205 when the > NBD server is shutting down: > > +FAIL: test_remove_during_connect_safe_hard (__main__.TestNbdServerRemove) > +---------------------------------------------------------------------- > +Traceback (most recent call last): > + File "/builds/qemu-project/qemu/tests/qemu-iotests/205", line 149, > in test_remove_during_connect_safe_hard > + self.assertExportNotFound('exp') > + File "/builds/qemu-project/qemu/tests/qemu-iotests/205", line 63, in > assertExportNotFound > + self.assert_qmp(result, 'error/desc', "Export 'exp' is not found") > + File "/builds/qemu-project/qemu/tests/qemu-iotests/iotests.py", line > 1246, in assert_qmp > + self.assertEqual(result, value, > +AssertionError: "Export 'exp' is already shutting down" != "Export > 'exp' is not found" > +- Export 'exp' is already shutting down > ++ Export 'exp' is not found > + : "error/desc" is "Export 'exp' is already shutting down", expected > "Export 'exp' is not found" > > https://gitlab.com/qemu-project/qemu/-/jobs/14745043965#L328 > > I have not seen this CI failure before, so it might be rare and hard > to reproduce. FYi, If you don't have time to investigate & fix it quickly, just file a gitlab bug and then annotate the test cases / clases with: @iotests.skip_flaky("https://gitlab.com/qemu-project/qemu/-/work_items/NNN") which will make the test be skipped in CI / locally, until someone has time to look at it. With regards, Daniel -- |: https://berrange.com ~~ https://hachyderm.io/@berrange :| |: https://libvirt.org ~~ https://entangle-photo.org :| |: https://pixelfed.art/berrange ~~ https://fstop138.berrange.com :|