@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.

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to cups in Ubuntu.
https://bugs.launchpad.net/bugs/512220

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

Status in “cups” package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: cups

  I often get trouble with cupsd crashing and Apport saying the
  following:

  The problem cannot be reported:
  The program crashed on an assertion failure, but the message could not be 
retrieved. Apport does not support reporting these crashes.

  I think the crash is due to my having a saved Firefox session with
  Cups' administration window (http://localhost:631/admin) in it. The
  crash seems to occur when this session is restored as part of the
  session restore when I log in to my desktop environment.

  I have turned on debug-logging and can see the following:
  D [25/Jan/2010:08:57:16 +0100] cupsdReadClient: 11 GET /images/cups-icon.png 
HTTP/1.1
  D [25/Jan/2010:08:57:16 +0100] cupsdSetBusyState: Active clients
  D [25/Jan/2010:08:57:16 +0100] cupsdAuthorize: No authentication data 
provided.
  D [25/Jan/2010:08:57:16 +0100] cupsdReadClient: 11 Closing on EOF
  D [25/Jan/2010:08:57:16 +0100] cupsdCloseClient: 11
  D [25/Jan/2010:08:57:16 +0100] cupsdSetBusyState: Not busy
  D [25/Jan/2010:08:57:16 +0100] cupsdWriteClient: 1354538648 Closing on 
unknown HTTP state 0
  D [25/Jan/2010:08:57:16 +0100] cupsdCloseClient: 1354538648

  How to reproduce:
  0) Make sure you have session restore activated. Make sure your favorite 
browser is set to restore the last session on reload.
  1) Load http://localhost:631/admin in your favorite browser.
  2) Restart your computer.
  3) Log in to your desktop environment.

  Expected result: The CUPS administration window should be loaded in your 
browser.
  Actual result: The CUPS administration window fails to load. The browser 
says: "The connection to the server was reset while the page was loading."

  It is not consistently reproducible, but I would say I see a failure
  rate of 80 %. It happens on both of my test machines.

  ProblemType: Bug
  Architecture: amd64
  Date: Mon Jan 25 09:00:30 2010
  DistroRelease: Ubuntu 10.04
  EcryptfsInUse: Yes
  InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
  Lpstat: Error: command ['lpstat', '-v'] failed with exit code 1: lpstat: No 
destinations added.
  MachineType: LG Electronics P300-T.APE4V
  NonfreeKernelModules: nvidia
  Package: cups 1.4.2-6
  Papersize: letter
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-11-generic 
root=UUID=01ebab7a-379c-48c8-87d6-a2800f6dccfd ro quiet splash
  ProcVersionSignature: Ubuntu 2.6.32-11.15-generic
  SourcePackage: cups
  Uname: Linux 2.6.32-11-generic x86_64
  dmi.bios.date: 06/30/2008
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: ELGNSF18
  dmi.board.name: ELGON
  dmi.board.vendor: LG Electronics
  dmi.board.version: Not Applicable
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LG Electronics
  dmi.chassis.version: N/A
  dmi.modalias: 
dmi:bvnPhoenixTechnologiesLTD:bvrELGNSF18:bd06/30/2008:svnLGElectronics:pnP300-T.APE4V:pvrNotApplicable:rvnLGElectronics:rnELGON:rvrNotApplicable:cvnLGElectronics:ct10:cvrN/A:
  dmi.product.name: P300-T.APE4V
  dmi.product.version: Not Applicable
  dmi.sys.vendor: LG Electronics

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