Print jobs sent to LPD print device are failing

Issue

• CUPS error: /usr/lib/cups/backend/lpd stopped with status 1!`
• Unable to process print jobs as communication appears to have been lost with a Networked UNIX (LPD) printer

• We are able to add the printer using system-config-printer but are not able to print any files. The error is "/usr/lib/cups/backend/lpd failed"

• One of the cups print queue keeps failing more often. Please find error below.

  #lpstat -p lp03
  printer lp03 is idle.  enabled since Wed 21 Oct 2015 09:40:57 AM CEST
          /usr/lib/cups/backend/lpd failed
  

• In our production box we are getting the below error for two printers.

  "/usr/lib/cups/backend/lpd failed"
  

  Whenever we resumed the printer after some time it got paused again with the above error.

• We have one network printer that having issue/error while submitting job to an LPD printer. The log file /var/log/cups/error_log contains:

  D [24/Jun/2015:07:14:55 +0000] [Job 952316] Connecting to 10.1.2.3:515 for printer lp1
  D [24/Jun/2015:07:14:55 +0000] [Job 952316] Connected to 10.1.2.3:515 (IPv4) (local port 1023)...
  D [24/Jun/2015:07:14:55 +0000] [Job 952316] Sending command string (5 bytes)...
  D [24/Jun/2015:07:14:55 +0000] [Job 952316] Reading command status...
  D [24/Jun/2015:07:14:55 +0000] [Job 952316] Backend returned status 1 (failed)
  D [24/Jun/2015:07:14:55 +0000] [Job 952316] Printer stopped due to backend errors; please consult the error_log file for details.
  

• We have configured a remote printer, however its not working. Error in logs:

  D [11/May/2016:17:33:28 +0200] [Job 6] Connecting to example:515 for printer printers/lp12
  D [11/May/2016:17:33:28 +0200] [Job 6] Connecting to printer...
  D [11/May/2016:17:33:28 +0200] [Job 6] STATE: -connecting-to-device
  D [11/May/2016:17:33:28 +0200] [Job 6] Connected to printer...
  D [11/May/2016:17:33:28 +0200] [Job 6] Connected to 10.2.3.4:515 (IPv4) (local port 1015)...
  D [11/May/2016:17:33:28 +0200] [Job 6] lpd_command 02 printers/lp12
  D [11/May/2016:17:33:28 +0200] [Job 6] Sending command string (16 bytes)...
  D [11/May/2016:17:33:28 +0200] [Job 6] Reading command status...
  D [11/May/2016:17:33:28 +0200] [Job 6] lpd_command returning 112
  D [11/May/2016:17:33:28 +0200] [Job 6] Backend returned status 1 (failed)
  D [11/May/2016:17:33:28 +0200] [Job 6] Printer stopped due to backend errors; please consult the error_log file for details.
  

• The print queue is being disabled, and the CUPS Error Log contains the following:

  D [22/May/2023:20:07:00 +0200] [Job 639167] Connected to 10.240.67.168:515 (local port 1023)...
  D [22/May/2023:20:07:00 +0200] [Job 639167] lpd_command 02 lp
  D [22/May/2023:20:07:00 +0200] [Job 639167] Sending command string (4 bytes)...
  D [22/May/2023:20:07:00 +0200] [Job 639167] Reading command status...
  D [22/May/2023:20:07:00 +0200] [Job 639167] lpd_command returning -1
  D [22/May/2023:20:07:00 +0200] [Job 639167] PID 10576 (/usr/lib/cups/backend/lpd) stopped with status 1.
  I [22/May/2023:20:07:00 +0200] [Job 639167] Backend returned status 1 (failed)
  I [22/May/2023:20:07:00 +0200] [Job 639167] Printer stopped due to backend errors; please consult the error_log file for details.