@Prunkdump: Sorry for the late reply, I was out of the office.

1) We use cups to be able to print from our Linux systems to our Windows
print servers. So, most of the printers setup in cups just connect to
the windows print server. We also have a few virtual printers installed
using custom shell scripts as backends (to print to PDF files in various
locations).

2) We do not require authentication for printing on the cups server.
Access to the cups admin pages is controlled via Linux group membership
and credentials.

The only major configuration change we made is the following in cupsd.conf:
MaxJobs 20000
MaxJobsPerPrinter 15000

We do sometimes have that many jobs coming in at once in nightly
processing, so we do need those queue sizes.

BTW, the problem hasn't surfaced a single time since we told BIRT / the
application using Java printing api to use the testing system. So I
guess do expose the bug, we both need lots of print jobs occasionally
(which we don't have on the testing system) and an application
requesting printer information and status like BIRT.

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https://bugs.launchpad.net/bugs/512220

Title:
  cupsd crash "Closing on unknown HTTP state 0"

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