topic Re: NPrinting engine remains offline in Qlik NPrinting

NPrinting engine remains offline

nesawant — Wed, 22 Apr 2020 20:15:00 GMT

Hi All,

NPrinting engine remains offline & status does not change to online. I checked the logs & below error appears in scheduler logs:

Exception caught Qlik.NPrinting.Repo.ServiceException: Lef File Server Unreachable

I have activated the license offline & it says activation successful.

Has anyone encountered this error before?

Best Regards,

Neha

Re: NPrinting engine remains offline

Bastien_Laugiero — Tue, 08 Jan 2019 14:21:47 GMT

Hello,

Was it an upgrade to Qlik NPrinting November 2018 or a fresh install? Has it ever worked before?

I don't think the error message you see is causing the problem. I think it's just a check failing at the service startup.

If you go to the WebConsole -> Admin -> Engine Manager and Edit the configuration for your engine, do you see a text box at the bottom asking to enter the Password for the certificate private key?

Thanks!

Re: NPrinting engine remains offline

nesawant — Wed, 09 Jan 2019 05:46:27 GMT

Hi Bastien,

This is a fresh installation & it never worked.

I see a text box at the bottom asking to enter the Password for the certificate private key on web console.

But when I enter the password, I get below screen

I get this error sometimes & sometimes it says certificate sent successfully. Engine still remains offline.

I checked all above mentioned parameters & they seem right. I am using server name without domain as suggested in other posts.

Any idea what is causing this issue or where shall I look into.

Best Regards,

Neha

Re: NPrinting engine remains offline

rubenmarin — Wed, 09 Jan 2019 09:13:15 GMT

Hi, have you checked to follow all steps in https://help.qlik.com/en-US/nprinting/November2018/Content/NPrinting/DeployingQVNprinting/Installing-qlikview-nprinting-engine.htm

Maybe it has something to do with step 10, this is somewhat new, I haven't installed yet any server that requires that step (last one was in june version), but it seems it's asking for that password.

Re: NPrinting engine remains offline

Bastien_Laugiero — Wed, 09 Jan 2019 10:30:18 GMT

Hello,

I would suggest the following steps:

Uninstall Qlik NPrinting Engine and remove it from the WebConsole -> Admin -> Engine Manager
As the Service account go to -> MMC -> Certificates -> My User Account -> Personal Certificates
Make sure the certificate called client_engine is not there. (if it is, remove it)
Reinstall the Qlik NPrinting Engine
Check the engine logs it should stop at something like:

Qlik.NPrinting.Engine 18.39.6.0 Qlik.NPrinting.Engine.EngineService 20190109T111811.187+01:00 INFO QLIKSERVER3 0 0 0 0 0 0 0 0 Starting up Engine service
Qlik.NPrinting.Engine 18.39.6.0 Qlik.NPrinting.Engine.EngineService 20190109T111811.469+01:00 INFO QLIKSERVER3 0 0 0 0 0 0 0 0 Certificates exchange HTTP server listening on http://localhost:4997/

Go to Webconsole -> Admin -> Engine Manager, add your engine and enter the certificate password
In the engine logs you should see something like:

Qlik.NPrinting.Engine 18.39.6.0 Qlik.NPrinting.Engine.EngineService 20190109T112533.798+01:00 INFO QLIKSERVER3 0 0 0 0 0 0 0 0 Starting RabbitMQ connection using certificate E7BAD4E2CD29F8B742EB2B1766C224948E109755
Qlik.NPrinting.Engine 18.39.6.0 Qlik.NPrinting.Engine.Consumer.EngineConsumer 20190109T112537.370+01:00 INFO QLIKSERVER3 0 0 0 0 0 0 0 0 Starting Engine Consumer
Qlik.NPrinting.Engine 18.39.6.0 Qlik.NPrinting.Engine.Consumer.EngineConsumer 20190109T112537.981+01:00 INFO QLIKSERVER3 0 0 0 0 0 0 0 0 Engine Consumer started successfully
Qlik.NPrinting.Engine 18.39.6.0 Qlik.NPrinting.Engine.EngineService 20190109T112538.156+01:00 INFO QLIKSERVER3 0 0 0 0 0 0 0 0 Slave Engine Service started successfully

Could you also make sure to disable your antivirus and check if you have any Proxy configured on your machine to make sure nothing interfers the communication between the Engine, RabbitMQ and Scheduler?

Hope this helps!!

Re: NPrinting engine remains offline

nesawant — Wed, 09 Jan 2019 11:26:47 GMT

Hi,

It is asking for password & when I enter password & click submit, it says certificate sent successfully. But engine still remains offline.

Best Regards,
Neha

Re: NPrinting engine remains offline

Bastien_Laugiero — Wed, 09 Jan 2019 12:46:07 GMT

Hello,

Could you try the following steps:

Uninstall Qlik NPrinting Engine
Remove the Engine in the WebConsole -> Admin -> Engine Manager
As the Service Account, go to MMC -> My User Account -> Personal -> Certificates
Make sure the certificate called client_engine is not there (if it is, remove it)
Reinstall QlikNprinting Engine
Once the installation is done the latest entries in the Engine logs should look like

Starting up Engine service			
Certificates exchange HTTP server listening on http://localhost:4997/

Go to the WebConsole -> Admin -> Engine Manager
Add your engine and enter the certificate password
If sent successfully, check in MMC -> My User Account -> Personal -> Certificates that the certificate client_engine has been created
In the engine logs, you should see those new entries

Starting RabbitMQ connection using certificate E7BAD4E2CD29F8B742EB2B1766C224948E109755			
Starting Engine Consumer			
Engine Consumer started successfully			
Slave Engine Service started successfully

In addition, could you make sure to disable any antivirus and make sure that you have no proxy enabled on the machine to make sure nothing is interfering?

Hope this helps!

Re: NPrinting engine remains offline

nesawant — Wed, 09 Jan 2019 15:02:07 GMT

Hi Bastien,

Can you please explain what is MMC & how do I get to it?

Best Regards,

Neha

Re: NPrinting engine remains offline

rubenmarin — Thu, 10 Jan 2019 10:01:54 GMT

To open mmc press [windows key]+R to open execute panel, type 'mmc' (without quotes) and press enter.

In File->add/remove components add 'certificate' and select 'personal account' in the next dialog, accept.

Re: NPrinting engine remains offline

nesawant — Thu, 10 Jan 2019 11:10:22 GMT

Hi Bastien,

I don't see a certificate called client_engine, I can see below certificate. Not sure if its same.

When I follow steps given by you, my engine log does not show below two entries

Starting Engine Consumer
Engine Consumer started successfully

After Starting RabbitMQ connection using certificate it directly shows Slave Engine Service started successfully

Best regards,

Neha

Re: NPrinting engine remains offline

Ruggero_Piccoli — Thu, 10 Jan 2019 11:27:32 GMT

Hi,

MMC is for Microsoft Management Console. Refer to official Microsoft documentation about how to use it.

Best Regards,

Ruggero

Re: NPrinting engine remains offline

nargesbrz — Fri, 18 Jan 2019 14:57:01 GMT

Hi Bastien,

I repeated your solution more than 20 times, I am absolutely sure that there is a bug on Nov 2018 version.

I tried on win 2012, 2016 and on a fresh installation , it doesnt work at all.

I also tried to install Sep2018 on a fresh installation, then restore my data, then upgrade to Nov2018, still same issue.

The only result differences between what I got and you posted is

I don't see this line in my log file " Engine Consumer started successfully.

it is as

Starting up Engine service

Certificates exchange HTTP server listening on http://localhost:4997/

Starting RabbitMQ connection using certificate E10B06DE1D0446B0522236162CB619C475244CA6

Slave Engine Service started successfully

Also, in the Sep2018 version I noticed certificate friendly name is as nprinting server, but when I install freshh NOv 2018 version or remove the engine and define, I dont see any friendly name in the certificate (in case if friendly name is a matter)

Hope you can help

Re: NPrinting engine remains offline

gkrish26 — Fri, 25 Jan 2019 08:26:44 GMT

Hi All,

we have tested, by enabling TLS 1.0 engine comes online. do test please follow

Start the registry editor by clicking on Start and Run. Type in "regedit" into the Run field (without quotations).
Highlight Computer at the top of the registry tree. Backup the registry first by clicking on File and then on Export. Select a file location to save the registry file.
Note: You will be editing the registry. This could have detrimental effects on your computer if done incorrectly, so it is strongly advised to make a backup.

browse to the following registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols
Right click on the Protocols folder and select New and then Key from the drop-down menu. This will create new folder. Rename this folder to TLS 1.1 or TLS 1.2 (depending on the protocol you want to enable)
Right click on the TLS 1.1 or TLS 1.2 key and add a new key underneath it.
Rename the new key as:
- Client
Right click on the Client key and select New and then DWORD (32-bit) Value from the drop-down list.
Rename the DWORD to DisabledByDefault.
Right-click the name DisabledByDefault and select Modify... from the drop-down menu.
Ensure that the Value data field is set to 0 and the Base is Hexadecimal. Click on OK.
Create another DWORD for the Client key as you did in Step 7.
Rename this second DWORD to Enabled.
Right-click the name Enabled and select Modify... from the drop-down menu.
Ensure that the Value data field is set to 1 and the Base is Hexadecimal. Click on OK.
Reboot the server

After the reboot, the server will be able to communicate through the SSL protocol you enabled. However, you need now to add it to your applications requests.

Re: NPrinting engine remains offline

Benjamin_C — Tue, 29 Jan 2019 09:44:37 GMT

one of my customer has tried and proved that enable TLS 1.0/1.2 solved the issue

Re: NPrinting engine remains offline

nesawant — Tue, 12 Feb 2019 11:52:02 GMT

Hello,

Tried enabling TLS 1.0 but it didn't work.

I installed September 2018 version which is working fine.

Best Regards,

Neha