From owner-freebsd-hackers@freebsd.org  Fri Dec 11 19:30:36 2015
Return-Path: <owner-freebsd-hackers@freebsd.org>
Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 5EDF0A041C3
 for <freebsd-hackers@mailman.ysv.freebsd.org>;
 Fri, 11 Dec 2015 19:30:36 +0000 (UTC)
 (envelope-from sgk@troutmask.apl.washington.edu)
Received: from troutmask.apl.washington.edu (troutmask.apl.washington.edu
 [128.95.76.21])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client CN "troutmask", Issuer "troutmask" (not verified))
 by mx1.freebsd.org (Postfix) with ESMTPS id 43CFD13C2;
 Fri, 11 Dec 2015 19:30:36 +0000 (UTC)
 (envelope-from sgk@troutmask.apl.washington.edu)
Received: from troutmask.apl.washington.edu (localhost [127.0.0.1])
 by troutmask.apl.washington.edu (8.15.2/8.15.2) with ESMTPS id tBBJUZPg003156
 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO);
 Fri, 11 Dec 2015 11:30:35 -0800 (PST)
 (envelope-from sgk@troutmask.apl.washington.edu)
Received: (from sgk@localhost)
 by troutmask.apl.washington.edu (8.15.2/8.15.2/Submit) id tBBJUYBu003155;
 Fri, 11 Dec 2015 11:30:34 -0800 (PST) (envelope-from sgk)
Date: Fri, 11 Dec 2015 11:30:34 -0800
From: Steve Kargl <sgk@troutmask.apl.washington.edu>
To: Navdeep Parhar <np@FreeBSD.org>
Cc: freebsd-hackers@freebsd.org
Subject: Re: sonewconn issue?
Message-ID: <20151211193034.GA3100@troutmask.apl.washington.edu>
References: <20151211160354.GA1005@troutmask.apl.washington.edu>
 <566B06B0.5060809@FreeBSD.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <566B06B0.5060809@FreeBSD.org>
User-Agent: Mutt/1.5.24 (2015-08-30)
X-Mailman-Approved-At: Fri, 11 Dec 2015 19:58:59 +0000
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
 <freebsd-hackers.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-hackers>, 
 <mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers/>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
 <mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 11 Dec 2015 19:30:36 -0000

On Fri, Dec 11, 2015 at 09:24:00AM -0800, Navdeep Parhar wrote:
> On 12/11/2015 08:03, Steve Kargl wrote:
> > Last night my system became wedged.  Inspection of/var/log/messages
> > revealed 290 messages of the form
> >
> > Dec 10 19:27:49 troutmask kernel: sonewconn: pcb 0xfffff8000a76c4b0:
> >     Listen queue overflow: 16 already in queue awaiting
> >     acceptance (1 occurrences)
> >
> > During this time, I could connect to the webserver on the system.
> > ssh into the box would connect, but I never got an actaul session.
> > This morning I found the console unresponse.
> >
> > Any suggestions for identifying the rogue process?
> >
> 
> Try "netstat -aLnp tcp" and look at the "Listen" column to see which 
> sockets are backlogged.  Then "sockstat -4l" to identify the process 
> that owns the socket.
> 

Thanks for the suggestions.  I'll keep this in mind if the
problem re-appears.  Unfortunately, I had no access to the
box.  ssh didn't work.  console was unresponse.  No serial
console.

I forgot to mention that this is FreeBSD-current circa
Nov 9th, 2015.  The box gets updated about once a month
or so.

-- 
Steve