Date: Mon, 24 Feb 2003 21:17:29 -0600 (CST) From: Jonathan Lemon <jlemon@flugsvamp.com> To: spork@inch.com, stable@freebsd.org Subject: Re: LAST_ACK timeout Message-ID: <200302250317.h1P3HTtJ056208@mail.flugsvamp.com> In-Reply-To: <local.mail.freebsd-stable/20030224181605.T29646@shell.inch.com>
next in thread | previous in thread | raw e-mail | index | archive | help
In article <local.mail.freebsd-stable/20030224181605.T29646@shell.inch.com> 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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200302250317.h1P3HTtJ056208>