Date: Thu, 9 Jan 2014 15:50:02 +0400 From: Gleb Smirnoff <glebius@FreeBSD.org> To: Cedric Tabary <ced+freebsd@grumly.eu.org> Cc: freebsd-stable@freebsd.org Subject: Re: possible netgraph regression on freebsd 10.0-RC3 Message-ID: <20140109115002.GV71033@FreeBSD.org> In-Reply-To: <20140102112714.GB16947@spike.grumly.eu.org> References: <20140102112714.GB16947@spike.grumly.eu.org>
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On Thu, Jan 02, 2014 at 12:27:14PM +0100, Cedric Tabary wrote: C> Hello, C> C> I upgraded several FreeBSD servers from 9.2-STABLE to 10.0-RC3 and I C> now have strange behavior of mpd-5.7. C> C> Symptoms : C> - mpd stops accepting connections (PPTP VPN), and stops accepting control C> connectiosn also (on telnet and http). C> - The only way to kill mpd is a SIGKILL C> - after killing mpd, all ng interfaces are still up and forwarding C> trafic C> - the only way to revert to normal operation is a server power-cycle, C> software reboot just freeze the kernel. C> C> dmesg shows a lot of : C> sonewconn: pcb 0xfffff80006f61930: Listen queue overflow: 4 already in C> queue awaiting acceptance C> however I can't find pcb 0xfffff80006f61930 in netstat and there is no C> flood, did I miss something ? C> C> netstat -naA shows pptp control connections with non null Recv-Q C> netstat -naA shows netgraph control sockets with non null Send-Q C> In normal operation conditions, all Send-Q/Recv-Q are 0 on all those C> control sockets. C> C> Attached : C> - dmesg C> - netstat -naA (anonymized) C> - lsof -n (anonymized) C> C> FreeBSD xxx 10.0-RC3 FreeBSD 10.0-RC3 #0 r259778: Mon Dec 23 C> 23:27:58 UTC 2013 root@snap.freebsd.org:/usr/obj/usr/src/sys/GENERIC C> amd64 C> C> All this is reproduced once every 2-3 days on 4 different servers. We've had a fix in ng_ksocket after 10.0-RC3, but the symptoms of that problem were somewhat different. However, it is worth updating. -- Totus tuus, Glebius.
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