From owner-freebsd-stable Wed Feb 26 0:43:48 2003 Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5A1BD37B401 for ; Wed, 26 Feb 2003 00:43:46 -0800 (PST) Received: from util.inch.com (ns.inch.com [216.223.192.21]) by mx1.FreeBSD.org (Postfix) with ESMTP id 327B343FCB for ; Wed, 26 Feb 2003 00:43:45 -0800 (PST) (envelope-from spork@inch.com) Received: from shell.inch.com (inch.com [216.223.192.20]) by util.inch.com (8.12.6/8.12.6/UTIL-INCH-3.0.10) with ESMTP id h1Q8hfgg085664; Wed, 26 Feb 2003 03:43:41 -0500 (EST) (envelope-from spork@inch.com) Received: from shell.inch.com (localhost [127.0.0.1]) by shell.inch.com (8.12.6/8.12.6) with ESMTP id h1Q8hfOh098687; Wed, 26 Feb 2003 03:43:41 -0500 (EST) (envelope-from spork@inch.com) Received: from localhost (spork@localhost) by shell.inch.com (8.12.6/8.12.6/Submit) with ESMTP id h1Q8he1b098684; Wed, 26 Feb 2003 03:43:41 -0500 (EST) X-Authentication-Warning: shell.inch.com: spork owned process doing -bs Date: Wed, 26 Feb 2003 03:43:40 -0500 (EST) From: Charles Sprickman To: Jonathan Lemon Cc: stable@FreeBSD.ORG Subject: Re: LAST_ACK timeout In-Reply-To: <200302250317.h1P3HTtJ056208@mail.flugsvamp.com> Message-ID: <20030226033845.V98344@shell.inch.com> References: <200302250317.h1P3HTtJ056208@mail.flugsvamp.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Mon, 24 Feb 2003, Jonathan Lemon wrote: > In LAST_ACK state, the machine should keep retransmitting the FIN > until it gets an ACK from the peer, or the connection times out, > which should take roughly 8 minutes. If the connections stay around > forever, then something is broken. The one thing all connections had in common was that they were outbound to MSN.com. I believe that to scale their junk software up, everything is behind load-balancers, which can make things interesting if the LB doesn't do things "correctly". > ISTR someone mentioning that things were working as expected in the > latest -stable, which version are you using? This particular box is 4.6.2-p2. Since rebooting with IPFilter in place, I'm not seeing it anymore. So either MSN fixed something or IPFilter is masking the problem (or both). Somewhere in my Google-ing, I found people claiming that LAST_ACK can sit around for days if the other end doesn't respond. If this were less of a harried situation, I would have tcpdumped some traffic to see if we were actually retransmitting the FIN. Got a PR or anything referencing the possible problem? Thanks, Charles > -- > Jonathan > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-stable" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message