Receiving allocation from unknown engine - how to fix?

[kevinpintokpa]

Another day, another NPrinting issue, sigh...

We are using the July 2017 engine.  NPrinting reports quietly stopped working six days ago, with days worth of report tasks being queued up - over 100.

Upon investigation, I found that the single NPrinting engine was offline.  I find the following error messages in the nprinting_scheduler.log file:

Receiving allocation from unknown engine 16ffadc1-5450-4ae4-b478-85c21d8eb6e0. Message will be discarded.

How to fix this?

[kevinpintokpa · Accepted solution]

So restarting the NPrinting services did not help.  I finally had to reboot the entire system upon which NPrinting was running - server and engine.  That seemed to fix it and the reports are coming through now.

[Natalija]

Hi,

I am getting exactly same error. Does anyone know what is causing it?

Natalija

[digimech]

Hello@kevinpintokpa 

I am having exactly same problem. Did you figured out the solution for this?

Affected product : NPrinting Sep 2019.

[Ruggero_Piccoli]

Hi,

Please avoid to comment a 4 years old conversation, start a new one instead and add all informations related to your case. 

If rebooting the whole server solves maybe there were some  local processes blocked. For example Qv.exe. So, if you are connecting to QlikView check with Windows task manager if there are Qv.exe processes running and stop them before rebooting the whole server.

Check also all the logs of Qlik NPrinting. 

Best Regards,

Ruggero

[digimech]

Hi @Ruggero_Piccoli ,

We have our NPrinting connection with the Qlik Sense server. The NPrinting engine goes offline each time and only after a server reboot it starts running the reports. Restarting a Qlik Engine services doesn't help. Every time we need to reboot the server . Please find the log screenshot below for reference. Any assistance on this will be highly appreciated.

[Ruggero_Piccoli]

Hi,

I suggest you to evaluate to upgrade your installation. Since September 2019 we solved many issues also related with RabbitMQ so, by upgrading, we will be sure you are not experiencing an already solved issue.

Best Regards,

Ruggero

[Frank_S]

@kevinpintokpa 

As @Ruggero_Piccoli

Suggest that you:

1. start a new discussion thread for recently found issues as much has changed including defect repairs, performance enhancements and feature updats since 2017 versions of NPrinting which was when this thread started.

2. Upgrade to the most recent version of NPrinting - all components ie: NP engine, server, designer (and on demand objects if applicable

Further you can try the following article in the meantime but if the issue persists, recommend upgrading asap.

https://community.qlik.com/t5/Knowledge-Base/How-to-Resolve-Qlik-NPrinting-Engine-Offline-Status/ta-...

Kind regards...