NPrinting Engine Offline and RabbitMQ Error

[Bo_PT]

Hi, All,

Our NPrinting DEV server (May 2023 IR) has been running well for months. But yesterday I noticed its engine status is offline. Meanwhile, a task hangs (with 'Running' status) there forever.

So far I have checked/done the following but they do not help:
. All NPrintng services are running.
. I have rebooted the server a couple of times.

I found this error in engine.log and scheduler.log: RabbitMq service is not connected - trying again in 60 seconds. ERROR: RabbitMQ.Client.Exceptions.BrokerUnreachableException: None of the specified endpoints were reachable

I followed the instruction in this link (https://help.qlik.com/en-US/nprinting/May2023/Content/NPrinting/Troubleshooting/Qlik-NPrinting-Messa...) and executed ''rabbitmqctl.bat status' command, it gave me error saying I need to run 'rabbitmqctl start_app' command first. So I ran that 'rabbitmqctl start_app' command. It only displayed a message 'Starting node xxxxx...' and then returned. But the problem remains.

I have submitted Qlik support ticket. Just want to seek advice from the community while I am waiting.

Thanks

[Frank_S]

Yes while there are steps you can take to fix this, they are a bit complex and can be found here. They must be follow 100 percent accurately.

https://help.qlik.com/en-US/nprinting/February2024/Content/NPrinting/Troubleshooting/Qlik-NPrinting-...

Since you have already found this, I would suggest a simpler route.

By performing a service release upgrade, you can solve the "rabbitMq service is not connected - trying again in 60 seconds" issue

However before doing so I would suggest that you follow the current support process via your support ticket to ensure the correct result and resolution for your specific environment.

Kind regards.

[Bo_PT]

Hi, Frank,

I uninstalled NPrinting Engine service and re-installed it. I got an error during installation saying port 5672 is not open. I contacted to our AWS team and they said the port 5672 is open on this server but it is not listening. I ran 'netstat -a | find "LISTENING"' command and port 5672 is not in the list. I finished the installation anyway and the problem remains.

Thanks

[David_Friend]

@Bo_PT are you able to install a patch on that environment? May 2023 is up to patch 4 now

[Frank_S]

It is possible then that some other program on your computer is consuming port 5672.

Check this article.

https://community.qlik.com/t5/Official-Support-Articles/Inaccessible-Qlik-NPrinting-Connections-Conn...

Kind regards...

[Bo_PT · Accepted solution]

Thanks @Frank_S and @David_Friend for your replies.

I uninstalled and reinstalled both NPrinting Server and Engine. The issue was solved after that.

The reason I did not upgrade NPrinting was because NPrinting version has to match with our Qlikview/Qlik Sense versions.

Thanks for everyone.