Date: Tue, 14 Aug 2007 14:00:48 +0300 From: Stefan Lambrev <stefan.lambrev@moneybookers.com> To: Eygene Ryabinkin <rea-fbsd@codelabs.ru> Cc: current@freebsd.org Subject: Re: "tcpflags 0x18<PUSH,ACK>; tcp_do_segment" kernel messages Message-ID: <46C18B60.8050400@moneybookers.com> In-Reply-To: <20070807073920.GV50228@void.codelabs.ru> References: <20070806224112.GA21876@muon.bluestop.org> <20070807073920.GV50228@void.codelabs.ru>
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Hi, Eygene Ryabinkin wrote: > Bruce, good day. > > Mon, Aug 06, 2007 at 11:41:12PM +0100, bruce@cran.org.uk wrote: > >> I cvsupped my -CURRENT laptop last night and have been building ports >> today. When I checked the dmesg there were lots of messages similar to: >> >> TCP: [204.152.184.73]:21 to [10.0.10.13]:65159] tcpflags 0x18<PUSH,ACK>; >> tcp_do_segment: FIN_WAIT_2: Received data after socket was closed, >> sending RST and removing tcpcb >> > > This was introduced in the /sys/netinet/tcp_input.c, 1.365. > The origin and need for the change was discuissed in > http://lists.freebsd.org/pipermail/freebsd-net/2007-July/014804.html > (See http://lists.freebsd.org/pipermail/freebsd-net/2007-July/014808.html > for the explanation of what's going on). > > If you were running -CURRENT on the same machine prior to CVSupping, > then you probably saw the 'Spurious RST' messages. They were > provoked by the same situation. The messages themselves are harmless, > This is not harmless here :( I'm running current from today 14.Aug. I use an network applications that hangs every time when I see such a message. Any ideas how can I debug, or help to someone who is familiar with the code ? My colleagues report and problems with ssh and apache on this server. > they just telling us that some data was came in, but the listener > had already closed his socket, so he is not interested in the data > anymore. > > Use sys.net.inet.tcp.log_debug to disable TCP stack debug output > and get rid of those. > -- Best Wishes, Stefan Lambrev ICQ# 24134177
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