From owner-freebsd-questions@FreeBSD.ORG Fri Oct 19 15:23:45 2007 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id CED5716A420 for ; Fri, 19 Oct 2007 15:23:45 +0000 (UTC) (envelope-from jamesh@lanl.gov) Received: from mailwasher.lanl.gov (mailwasher.lanl.gov [204.121.3.2]) by mx1.freebsd.org (Postfix) with ESMTP id 841FA13C46A for ; Fri, 19 Oct 2007 15:23:41 +0000 (UTC) (envelope-from jamesh@lanl.gov) Received: from mailrelay1.lanl.gov (mailrelay1.lanl.gov [128.165.4.101]) by mailwasher.lanl.gov (8.13.8/8.13.8/(ccn-5)) with ESMTP id l9JFNdh5009341; Fri, 19 Oct 2007 09:23:40 -0600 Received: from oppie-mail.lanl.gov (oppie-mail.lanl.gov [128.165.4.123]) by mailrelay1.lanl.gov (8.13.8/8.13.8/(ccn-5)) with ESMTP id l9JFNdBY008341; Fri, 19 Oct 2007 09:23:39 -0600 Received: from [128.165.86.10] (secretariat.lanl.gov [128.165.86.10]) by oppie-mail.lanl.gov (Postfix) with ESMTP id 3366C1F8004; Fri, 19 Oct 2007 09:23:33 -0600 (MDT) From: James To: Andrew Liles In-Reply-To: References: Organization: Los Alamos National Laboratories Date: Fri, 19 Oct 2007 09:24:02 -0600 Message-Id: <1192807442.73574.17.camel@secretariat.lanl.gov> Mime-Version: 1.0 X-Mailer: Evolution 2.10.3 FreeBSD GNOME Team Port X-CTN-5-MailScanner-Information: Please see http://network.lanl.gov/email/virus-scan.php X-CTN-5-MailScanner: Found to be clean X-CTN-5-MailScanner-From: jamesh@lanl.gov X-Spam-Status: No Content-Type: text/plain Content-Transfer-Encoding: 7bit X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-questions@freebsd.org Subject: Re: FreeBSD hang without panic X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: jamesh@lanl.gov List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 19 Oct 2007 15:23:46 -0000 > On the machine itself no messages are shown and the machine responds to > repeated ENTER key presses with the login prompt. Once you enter "root" > [ENTER] then no further responses (except line feeds as you press ENTER). > > What kind of hang is this? Could it be a DoS attack? Or is it some > internal process hanging? I have a debug kernel but as the only solution > is a power-off reset, I never get any dump. > > Any suggestions please where I might start to look, or services to > experiment disabling? > My very first instinct was hardware failure. It has all the right pieces: intermittent, came out of nowhere, weird problems as a result. But. In the interests of science: I know you said existing shells stop working, but does that include the secure shell? ssh into the box when it's frying itself and see what happens. Presumably you've checked the /var/log stuff already? James