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How to Resolve NPrinting Messenger Service Not Running and Not Starting

Article Number: 000043782 | Last Modified: 2020/01/31

Description

Description of the Problem:

  • NPrinting is down and cannot normally start the NPrinting Messaging service and
  • Subsequently the NP Scheduler service fails to start as well.
  • This results in most NPrinting systems from operating as expected including report distribution and previewing.

Applicable Environments: 

  • September 2018 SR 2 and older versions only.
! This solution is only applicable to September 2018 SR 2 and older versions only. Do NOT use this solution with November 2018 and later/newer versions of NPrinting as this will break NPrinting entirely.

Cause

What has caused this problem?

Result: The folder corrupted is in the following location:
  • C:\ProgramData\NPrinting\RabbitMQ\db\rabbit@&computername%-mnesia

Resolution

Diagnose
  • Using an Administrator Command Prompt, navigate to C:\Program Files\NPrintingServer\rabbitmq_server-3.x.x\sbin 
Note: The path will vary depending on which version of NPrinting/Rabbitserver is installed. To be sure, simply navigate to "C:\Program Files\NPrintingServer" and check the folder name for the Rabbit server in order to know the correct full path to use.
  • Type rabbitmq-server.bat start
  • This may prompt the server startup and exit with a failure with messages such as “not_a_dets_file” or “not a dets file” referring to files in C:\ProgramData\NPrinting\RabbitMQ\db\
(Note: Before proceeding, make a backup copy of the NPrinting database)
To resolve the issue:
  • 1. Stop all NPrinting services then navigate to C:\ProgramData\NPrinting\RabbitMQ\db\
  • 2. Rename the folder:  rabbit@&computername% to rabbit@&computername%.old
for example: rename the "rabbit@QlikServer3-mnesia" folder (This will enable the recreation of this folder on the NP server in turn repairing the rabbit database)
 
User-added image
  • 3. Go to the Windows 'Services' panel and start all NPrinting services. Notice that a new db subfolder is generated
  • 4. Open a command prompt and navigate to C:\Program Files\NPrintingServer\rabbitmq_server-3.5.7\sbin (determine the exact path as per the 'Diagnosis' section of this article)
  • 5. Then type into this command prompt:  rabbitmqctl.bat list_permissions
  • 6. If it is working normally, you will see:
  • User-added image


Note: if your NPrinting installation began as NP 17.3 or lower, you may also need to repair the rabbit "remote user" account associated with the rabbit messaging service

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