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Date: Tue, 19 Sep 2006 15:48:18 +0200
From: Andre Oppermann <andre@freebsd.org>
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To: Ian FREISLICH <if@hetzner.co.za>
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Cc: freebsd-current@freebsd.org
Subject: Re: Connections locking up with today's -CURRENT
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Ian FREISLICH wrote:
> Hi
> 
> Anyone noticed that today's current has connections jamming like below:
> 
> Proto Recv-Q Send-Q  Local Address          Foreign Address        (state)
> tcp4       0  33028  196.7.162.25.22        196.7.147.230.3569     ESTABLISHED
> 
> Or
> 
> Proto Recv-Q Send-Q  Local Address          Foreign Address        (state)
> tcp4       0    846  41.204.193.40.783      196.7.147.20.4131      LAST_ACK
> tcp4       0   2707  41.204.193.40.783      196.7.147.136.3009     LAST_ACK
> tcp4       0    650  41.204.193.40.783      196.7.147.18.2159      LAST_ACK
> tcp4       0    587  41.204.193.40.783      196.7.147.20.3710      LAST_ACK
> tcp4       0    587  41.204.193.40.783      196.7.147.18.2155      LAST_ACK
> 
> It's odd because with the top one, I can still log out and the shell
> disappears, except for the sshd process, which if I kill it terminates
> the connection.
> 
> In the second case, those LAST_ACK connections have been around for
> about 2 hours.
> 
> Heavy (well, not so heavy) traffic seems to trigger this on long
> standing connections.  For instance, 'tail -f /var/log/spamd.log'
> on a busy spamassassin process will do it.

Do you have an em(4) interface running at 100Mbit?

-- 
Andre