From owner-freebsd-stable@FreeBSD.ORG Wed Dec 12 22:24:24 2012 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 5CEFC451 for ; Wed, 12 Dec 2012 22:24:24 +0000 (UTC) (envelope-from dweimer@dweimer.net) Received: from webmail.dweimer.net (24-240-198-187.static.stls.mo.charter.com [24.240.198.187]) by mx1.freebsd.org (Postfix) with ESMTP id 0584A8FC15 for ; Wed, 12 Dec 2012 22:24:23 +0000 (UTC) Received: from www.dweimer.net (webmail.dweimer.net [192.168.5.1]) by webmail.dweimer.net (8.14.5/8.14.5) with ESMTP id qBCMOM4e039462 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for ; Wed, 12 Dec 2012 16:24:23 -0600 (CST) (envelope-from dweimer@dweimer.net) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Date: Wed, 12 Dec 2012 16:24:22 -0600 From: dweimer To: Subject: Re: 9.1 system hung with top open on console, yet responsive on ssh =?UTF-8?Q?sessions=3F?= Organization: dweimer.net Mail-Reply-To: In-Reply-To: <17622505fce802a8359c4a37f120f9bf@dweimer.net> References: <17622505fce802a8359c4a37f120f9bf@dweimer.net> Message-ID: <258779adcca4634d17cd2a4122ebbdea@dweimer.net> X-Sender: dweimer@dweimer.net User-Agent: Roundcube Webmail/0.8.1 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list Reply-To: dweimer@dweimer.net List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 12 Dec 2012 22:24:24 -0000 On 2012-12-12 15:58, dweimer wrote: > I ran into a weird one, have a 9.1 test system (virtual in VMWare > Workstation 9) that I left running logged into the console with top > running. The console the top process it was running appear to have > hung, can't use ALT + F1,F2... to switch virtual consoles. However I > can log in to the system via ssh, if you run top you get the same > information on the console, can even interact with it, switching > search order and the like. systat also seems to not display current > information. I can do everything I have tried through the console > except I noticed that syslog isn't writing data and a > /etc/rc.d/syslog > restart hung as well. > > This is just a test system running one single Java program (Ubiquiti > UniFi controller software) that is responding just fine as well. > Thought maybe it was disk access related, however I have confirmed > that I can read and write to the disk, used dd if=/dev/random > of=/.../random.out..., to each file system and was able to write to > all of them. Before I reboot the system (I have a feeling it won't > reboot cleanly), I was curious if anyone else has ever seen this and > what I should check to possibly identify what caused the problem. Might have discovered its probable related to as I noticed as well that that date command was always returning yesterdays date with the time set the same as top returned. I went ahead and reset the virtual machine with the sysctl value set as listed in the thread linked to above. will see if I hit the issue again or not. Though this application will be moved off this test system to my actual serve as soon as the 9.1-Release is official. so it may not be running long enough to know if that is the real solution. -- Thanks, Dean E. Weimer http://www.dweimer.net/