Change the Qlik NPrinting Server hostname

Bastien_Laugiero — Thu, 21 Apr 2022 07:52:02 GMT

After changing the server hostname of the operating system hosting Qlik NPrinting, the Qlik NPrinting Engine may appear Offline in the NPrinting administration console.

The QlikNPrintingMessagingService and Qlik Nprinting Scheduler service will be stopped. If you try to start then it will fail.

Environment:

2018 and earlier versions

Before proceeding, you must ensure to back up the Qlik NPrinting Database in the event that an unexpected corruption occurs while following the steps outlined in this article. If you encounter a failure, you will need to reinstall the Qlik NPrinting server and restore the backed up database: Backup and restore Qlik NPrinting.

Part 1: Update the NPrinting Server configuration files

Open the Windows command line console as administrator (cmd.exe).
In the command line move the RabbitMQ command prompt (sbin dir) by using the command
cd "C:\ProgramFiles\NPrintingServer\rabbitmq_server-3.5.7\sbin"
(the path may be different, depending on the Qlik NPrinting Server installation folder).
Run the command:
rabbitmq-service.bat remove
Run the command:
rabbitmq-service.bat install
Go to the service console and Right-click -> Properties on QlikNPrintingMessagingService
Synchronize back the .erlang.cookie by copying the one in C:\Windows\.erlang.cookie and pasting it in:

For Nprinting June 2018 to now:

C:\WINDOWS\system32\config\systemprofile

For any earlier versions:

C:\<user-who-installed-NPrinting>\.erlang.cookie
Start the QlikNprintingMessagingService
Go back to the Command Prompt and type the command rabbitmqctl.bat list_permissions

If you get the result below then you can restart all NPrinting server services and all services should start normally.

Note that the Qlik NPrinting engine will not start since it is still referencing the original server hostname. See Part 2 below to resolve.

If otherwise, you may use this guide to troubleshoot the problem: Qlik NPrinting messaging service (RabbitMQ) start up and connection problems

Part 2: Updating the NPrinting Engine

Stop the Qlik Nprinting Engine service and
Open the file C:\Program Files\NPrintingServer\NPrinting\Engine\engine.config (take a backup of this file first)
Locate the line <add key="rabbitmq-host" value="servername" />
Change servername value to the new computer host name where NPrinting Server (Scheduler Service) is installed.
Save the Engine.config file
Go to the NPrinting Engine Manager in the NPrinting Web console under Admin > Engine Manager
Delete the original engine entry
Create new engine entry
Resend the certificates (enter the certificate password used when installing the NPrinting Engine originally. If you do not recall the password, you will have to reinstall the NPrinting Engine. If this is necessary, make sure to document the certificate password).
Start the NPrinting Engine

Re: Chang the Qlik NPrinting Server hostname

muhammadraza — Sat, 09 Apr 2022 10:51:36 GMT

steps number 5 and 6 of part 1 are not clear. Kindly put clarification. There is no cookie in c:\windows and nothing is written what to do after right clicking on QlikNPrintingMessagingService.

article Change the Qlik NPrinting Server hostname in Official Support Articles

Change the Qlik NPrinting Server hostname

Environment:

Part 1: Update the NPrinting Server configuration files

Part 2: Updating the NPrinting Engine

Re: Chang the Qlik NPrinting Server hostname