Date: Fri, 21 Feb 2003 18:07:48 -0600 (CST) From: Mike Silbersack <silby@silby.com> To: Steve Shorter <steve@nomad.tor.lets.net> Cc: freebsd-net@freebsd.org Subject: Re: TCP stuck in LAST_ACK in 4.5 and 4.6?? Message-ID: <20030221175707.Y1033@odysseus.silby.com> In-Reply-To: <20030221151701.A9389@nomad.lets.net> References: <20030221151701.A9389@nomad.lets.net>
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On Fri, 21 Feb 2003, Steve Shorter wrote: > This is PR kern/25986 which is still open. > > Apparently, it can be interpreted as a bug in the TCP > protocol. > > Is there work around this or do I just have > to crank up maxsockets and reboot the machine every now > and then like my old NT server :-) > > -steve The answer is: I do not know for sure, I have not done sufficient testing to prove the nonexistence of the problem. However, what I can share with you is this snippet of a conversation about the problem I had back in October: --- From: G.P. de Boer <I'll save him from spambots> To: Mike Silbersack <silby@silby.com> Subject: The "stale TCP-connects in LAST_ACK" problem Hi Mike, I've upgraded my system to 4.7-STABLE as you said, to see if the patches Matt Dillon MFC'ed made my problem disappear. I have good news: with a current uptime of more than 4 days I have no single stale connection in the LAST_ACK state. On 4.6.2 I have seen a number of stale connections starting from about 3 days of uptime; From this I conclude (a vulcan would kill me for such reasoning though) it's fixed. --- So, I would suggest that you update to 4.7-stable. If that's not an option, I can look back and see if I can figure out which patches in question I was referring to at the time. Sorry that I can't give you a more concrete answer. Dillon's changes weren't meant to fix the LAST_ACK problem, but they ended up doing so for G.P. de Boer. I would be very interested in hearing if they have the same effect for you. Mike "Silby" Silbersack To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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