How to keep RHEL printers from being permanently disabled due to printing errors

Issue

• Print jobs are stopped if network printer is not reachable
• Some print jobs are not printing as expected
• Printer host is unreachable causing issues
• Printing jobs in the printing queue disabled randomly.
• How to reprint jobs that fail due to lost connection?

• Printer disabled with the following messages:

  W [07/Jan/2012:17:19:04 +0900] [Job 2564] Remote host did not respond with command status byte after 300 seconds!
  D [07/Jan/2012:17:19:04 +0900] [Job 2564] lpd_command returning 98
  E [07/Jan/2012:17:19:04 +0900] PID 16592 stopped with status 1!
  

• A network printer is configured on the server. Some times the printer switches from "Enable" to "Disable". The printer must be re-enabled manually to be able to use it.

• Sometimes we are having issues with printing and users will complain that invoices or delivery notes are not printing. When I run "lpq -P Q7PRINTER" the output shows:

  lpq -P Q7PRINTER
  Q7PRINTER not ready 
  

• Is there a configuration item that makes CUPS retry if the client connection times-out to a CUPS server?

• We are using the CUPS utility to print jobs in RHEL servers. For some reason the printers are going to paused state.

• One of the printers gets disabled frequently with the following status:

  # lpstat -p IT1
  printer IT1 disabled since Fri 15 Nov 2013 03:50:04 PM EST -
          /usr/lib/cups/backend/lpd failed