[cups.general] SSL produces intermittent printer outage

[Matt LaPlante]

On Fri, Feb 11, 2011 at 4:31 PM, John A. Sullivan III <
jsullivan at opensourcedevel.com> wrote:

> All the apps are running elsewhere.  The print server only handles
> printing.  All the client.conf files are set to:
>
> ServerName print01.pacifera.com:931
> Encryption Always
>
> I see nothing at all in error_log at that time.  Occasionally, I see:
> SSL shutdown failed: Error in the push function.
>
> But not when we are having the problem.  Am I looking at the wrong log? I
> don't see anything pertinent in access_log either.  Thanks - John
>

Assuming I have understood your original post correctly, I have heard of
similar complaints.  In our case, the client initially connects to the
server and receives the standard redirect for an SSL connection.  For some
reason, it a few cases, rather than reconnecting, the client just hangs up.

Have you taken a packet capture of the problem?


>
> > You could check the server logs to see if there was a bad SSL =
> > negotiation - are you running the apps on the print server or are the =
> > apps pointed at another server?
> >
> > On Feb 11, 2011, at 11:36 AM, John A. Sullivan III wrote:
> >
> > > Hello, all.  Because our print servers and our entire environment is =
> > multi-tenant, we encrypt traffic wherever possible including our print =
> > jobs.  However, we are having a persistent problem using encryption with
> =
> > CUPS version 1.4.4-3 on Debian Lenny (I believe CUPS is from Squeeze, =
> > though).
> > >=20
> > > Every one in a while, the printers will not appear in the printer list
> =
> > of the various applications.  The result ranges from nuisance =
> > (OpenOffice shows only a Generic Printer) to really nasty (Timberline =
> > crashes and can potentially corrupt its database).
> > >=20
> > > I see nothing in the error logs.  Has anyone else experienced or, =
> > better yet, solved this? Any hints on how to troubleshoot it further? =
> > Alas, it is only a couple of times per week problem.  Thanks - John
> > > _______________________________________________
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> > > cups at easysw.com
> > > http://lists.easysw.com/mailman/listinfo/cups
> >
> > ________________________________________________________________________
> > Michael Sweet, Senior Printing System Engineer, PWG Chair
> >
>
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