cupsys problems

[Gavin McCullagh]

Hi,

we're experiencing terrible problems with cups.  We currently have two
print queues, one is a hp network laserjet 2300, the other is a HP DeskJet
845C hooked to a thin client.

Twice this week, all print queues stopped spooling to the printer.
Restarting cups makes no difference, clearing the queues doesn't change
anything either.  On Tuesday I removed all print queues and added them back
afresh.  This fixed the problem until this morning when it recurred.  I
noticed this message on the CUPS forums so I have tried downgrading to
1.2.0 for now to see if it helps.  This is mostly desperation.

http://www.easysw.com/~mike/cups/newsgroups.php?s10306+gcups.general+v10306+T0

I've looked at logs, with debug mode on and there's nothing terribly
obvious.

A few lines we're seeing regularly are:

I [28/Sep/2006:10:00:03 +0100] CUPS-Get-Default client-error-not-found: No default printer

D [26/Sep/2006:14:22:04 +0100] cupsdAuthorize: No authentication data provided.
D [26/Sep/2006:14:22:04 +0100] Get-Printer-Attributes ipp://localhost/printers/Y3BWLaser
D [26/Sep/2006:14:22:04 +0100] cupsdProcessIPPRequest: 6 status_code=0 (successful-ok)
D [26/Sep/2006:14:22:05 +0100] cupsdReadClient: 8 POST / HTTP/1.1
D [26/Sep/2006:14:22:05 +0100] cupsdAuthorize: No authentication data provided.
D [26/Sep/2006:14:22:05 +0100] CUPS-Get-Default
I [26/Sep/2006:14:22:05 +0100] CUPS-Get-Default client-error-not-found: No default printer

Has anyone come across this problem?

Gavin