From owner-freebsd-stable Mon Feb 24 19:17:33 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 CF34637B401 for ; Mon, 24 Feb 2003 19:17:31 -0800 (PST) Received: from mail.flugsvamp.com (ts46-01-qdr3643.mdfrd.or.charter.com [68.118.36.71]) by mx1.FreeBSD.org (Postfix) with ESMTP id 19D7643FB1 for ; Mon, 24 Feb 2003 19:17:31 -0800 (PST) (envelope-from jlemon@flugsvamp.com) Received: (from jlemon@localhost) by mail.flugsvamp.com (8.12.6/8.12.6) id h1P3HTtJ056208; Mon, 24 Feb 2003 21:17:29 -0600 (CST) (envelope-from jlemon) Date: Mon, 24 Feb 2003 21:17:29 -0600 (CST) From: Jonathan Lemon Message-Id: <200302250317.h1P3HTtJ056208@mail.flugsvamp.com> To: spork@inch.com, stable@freebsd.org Subject: Re: LAST_ACK timeout X-Newsgroups: local.mail.freebsd-stable In-Reply-To: Organization: Cc: 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 In article you write: >Hello, > >I recently ran into a situation on a large mail server where MSN.com had >what looks to be problems with their load balancers. The end result of >this was that we had almost 4,000 connections in "LAST_ACK" state which >led to the box no longer being able to establish outgoing connections. It >wasn't clear exactly what resource was being exhausted (wasn't mbufs, and >nothing at all in the logs). 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. ISTR someone mentioning that things were working as expected in the latest -stable, which version are you using? -- Jonathan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message