topic Re: No Server & Lost Connection to Server in QlikView

No Server & Lost Connection to Server

jagan — Mon, 26 Jan 2026 18:19:17 GMT

Hi All,

We are getting the No Server issue and Lost Connection to Server messages frequently.

Lost Connection to Server:

The Dashboards size are around 1 to 100MB size and doesn't has any complex calculations in the frond end just used Sum() & Count() kind of expressions. We have set the Session Timeout as 1800 seconds for this. Still we are getting this message with in 3 minutes.

No Server:

When we checked the CPU usage is around 50% and memory is availability is more than 32 GB. When we refresh the browser again we are getting the list of Dashboards in Accesspoint. We are getting this message randomly. Restarted all QV Services & finally rebooted the server also. The issue still not resolved.

mby gwassenaar mto ashfaq_haseeb swuehl hic MRKachhiaIMP tresesco

Please suggest on this.

Regards,

Jagan.

Re: No Server & Lost Connection to Server

tresB — Wed, 05 Aug 2015 04:55:58 GMT

Hi Jagan,

What is the SR version? if not SR12, I would consider upgrading it to SR12. Are you using IIS or QVWS? If IIS, you might want to check the IIS settings too.

Re: No Server & Lost Connection to Server

jagan — Wed, 05 Aug 2015 05:11:54 GMT

Hi,

We are using 11.2 SR5 version. We are using IIS with, please attach some screenshot to check in IIS settings.

Regards,

Jagan.

Re: No Server & Lost Connection to Server

tresB — Wed, 05 Aug 2015 05:22:56 GMT

Varries with IIS version. Please check MS site :Configure Idle Time-out Settings for an Application Pool (IIS 7) or such.

Is it happening with a specific app? If so, check the document specific timeout/inactive session as well (alongwith server level settings). User Document->Select the app->Server->performance.

Re: No Server & Lost Connection to Server

jagan — Wed, 05 Aug 2015 05:54:08 GMT

Hi,

I checked in the IIS and it is set to 20 mins (which is the default setting). It is happening for all the apps.

Sometimes getting No Server issue, accesspoint itself not loading.

Regards,

Jagan.

Re: No Server & Lost Connection to Server

buzzy996 — Wed, 05 Aug 2015 05:55:15 GMT

hi jagan,

are you crosschecked ur network connections..even i faced couple of times the same issue..when i was restarted the services most of the times the issue was resolved.

Re: No Server & Lost Connection to Server

jagan — Wed, 05 Aug 2015 05:58:53 GMT

Hi,

We restarted the services and Server several times, but no success.

Regards,

Jagan.

Re: No Server & Lost Connection to Server

buzzy996 — Wed, 05 Aug 2015 06:06:08 GMT

hi jagan,

what i mean, most of the times as you know we published qv documents/configured services in different network drives/machines..if so,now ur AP server able to communicate with all those apps/services?

Re: No Server & Lost Connection to Server

jagan — Wed, 05 Aug 2015 06:08:44 GMT

Yes, all are fine. With in few seconds when we refresh the issue is gone.

Regards,

Jagan.

Re: No Server & Lost Connection to Server

buzzy996 — Wed, 05 Aug 2015 06:13:47 GMT

ohh..,is't resolved?

Re: No Server & Lost Connection to Server

jagan — Wed, 05 Aug 2015 06:19:39 GMT

No it is not resolved, it is appearing frequently when refresh the browser it is working. But sometimes it is taking 4 or 5 times refreshes.

Regards,

Jagan.

Re: No Server & Lost Connection to Server

qlikviewwizard — Wed, 05 Aug 2015 06:26:58 GMT

Hi Jagan,

Please check TCP/IP settings and add TCP keep alive to the client. Also check if network has some issues.

Re: No Server & Lost Connection to Server

buzzy996 — Wed, 05 Aug 2015 06:28:41 GMT

very strange...i think so it's bug or network issue.

i'm sure u have idea on this, last but not least...are u using .net framework 4.0+?,if ur using it's fine else u supposed to upgrade fro the same.

i believe nothing is a wrong apart from those things.

let see some one will give better answer here .

Re: No Server & Lost Connection to Server

timsaddler — Mon, 07 Dec 2015 11:03:28 GMT

Hello we are having some issues with this error message appearing.

Behind the scenes , one node of our cluster "appears" to have dropped .

I say "appears" as all services are reported running on the Mgmt Console.

However the Statistics tab reports no connection to Server1.

We are on 11.2 SR11 .

Is ther a particular "logfile" I can look at to help me diagnose the problem?

Thanks in advance