topic Re: lost connection Ajax QV Server 11 R2 in QlikView

lost connection Ajax QV Server 11 R2

Emmanuelle__Bustos — Mon, 26 Jan 2026 18:19:17 GMT

Hello

Does anybody had the next issue: when open a model using IE Plugin it opens without problem but if you try to open it with Ajax client it shows a window: Lost Connection to Server Reconnecting....

and it blinks as the server try and try to open with no response.

Used (Firefox 12 and IExplore 9 Ajax clients having the same result)

Re: lost connection Ajax QV Server 11 R2

Wed, 20 Jun 2012 20:06:53 GMT

Hello:

We are having the same issues with our Ajax client. We are using Internet Explorer 8 for our PCs and Safari on an iPad. We are able to get a connection, but frequently experience lost connection notices. The Ajax client also sometimes takes a very long time to load--two to three minutes. This problem started after upgrading to R1.

Any updates on a fix for this problem would be greatly appreciated.

Thanks,

Ben D.

Re: lost connection Ajax QV Server 11 R2

Tue, 24 Jul 2012 23:03:11 GMT

I have the same problem on QV 11. Any solution on this issue yet?

Re: lost connection Ajax QV Server 11 R2

yavoro — Wed, 22 Aug 2012 16:27:07 GMT

Same issue here...

Re: lost connection Ajax QV Server 11 R2

Emmanuelle__Bustos — Wed, 12 Sep 2012 18:36:05 GMT

This is a very rare issue due it only happens with one model in specific, but cant found a solution yet

Re: lost connection Ajax QV Server 11 R2

Fri, 05 Oct 2012 10:19:25 GMT

We notice the same problem in our side. If you have any suggestion it will be grate. do you have any answer from support about this issue?

Thansk,

Re: lost connection Ajax QV Server 11 R2

Emmanuelle__Bustos — Fri, 05 Oct 2012 14:19:21 GMT

Sorry but the model was replaced for a new one, so the issue is not there but we couldn't find out what is this issue related to .

Re: lost connection Ajax QV Server 11 R2

rothtd — Wed, 02 Jan 2013 16:56:34 GMT

This probably isn't your issue, but I wanted to add that we also had this issue for QV11 SR2. AJAX seemed to 'timeout' and loose the connection after ~5 min of idle activity [the error message matches the screenshot your posted], but the Plug-in workded great (no issues with lost/reset connections). Our timeouts in QMC were set at 60min so we were confused. We eventually found that a network load balancer (F5) was set at the default 5 min timeout. Once we switched this to 60 min AJAX started working normally (it didn't lose the connection after ~5 min of idle activity). I believe IIS also has timeout settings, but I didn't verify.

We have also received this error message (see screenshot on first post) when the user has multiple sessions open in QlikView. Specificially, in a training situation where we have 20 workstations set up under the same id and they all hit the same QV app with the same id. The 'students' start complaining that they are all getting this error and then we remember to have them log out and back in under their own individual user ids.

Re: lost connection Ajax QV Server 11 R2

Wed, 02 Jan 2013 17:03:43 GMT

where do you set the network load balancer (F5)? - Thanks

Re: lost connection Ajax QV Server 11 R2

Emmanuelle__Bustos — Wed, 02 Jan 2013 17:08:48 GMT

Hi rothtd

Thanks for your response but my problem is not the timeout, i mean the problem and the message "Lost Conecction and Reloading" appears since the first momment the document is opened, never pass anytime just at the starts.

Re: lost connection Ajax QV Server 11 R2

rothtd — Wed, 02 Jan 2013 17:11:38 GMT

This was done by a different team (our Network Engineering team) so I'm not sure how they did it. We have 2 QVS servers (clustered), and in front of them is a F5 load balancer (we also use QV11 load balancing as well). The point being that one of the differences between the plug-in and AJAX is they 'talk' using different network protocols, and the 5 min timeout was set for port 80/443 taffic (which would be AJAX). For whatever reason the Plug-in was not subjected to this network level timeout (I believe because it is talking on ports 4747/4774).

We did not configure the network load balancer within QlikView (QMC) it was done at the network level outside of QlikView (if that was your question).

Re: lost connection Ajax QV Server 11 R2

Thu, 14 Mar 2013 10:06:40 GMT

Having the same issue here! It appears after every action of the user. Please help?

Re: lost connection Ajax QV Server 11 R2

Wed, 22 May 2013 07:17:19 GMT

I am facing the exatly same problem. In addition with that Saffari browser also has the same problem. But good news is Google crome is working fine. I need a solution.............please help me.

Re: lost connection Ajax QV Server 11 R2

Tue, 11 Jun 2013 17:35:54 GMT

Anything new on this? I'm having the exact same issue. And it happends on certain documents...not all of them...

Re: lost connection Ajax QV Server 11 R2

Lee_Matthews — Mon, 17 Jun 2013 22:54:51 GMT

My understanding is that sessions are controlled by cookies. If the browser settings are preventing cookies being saved then this might explain the behaviour. It would also explain why one browser type works while another doesnt.

Re: lost connection Ajax QV Server 11 R2

dmohanty — Tue, 16 Jul 2013 10:02:33 GMT

Hi All,

Are you all using a common user id to access the apps from different machines? If Yes, then issue will persist.

If a common user id (single user id) is used from different locations/different machines, then this type of issue will arise. Try loging in the same application from different user id from any machine, this issue wont come.

Please check and let me know.

Regards!

Re: lost connection Ajax QV Server 11 R2

Emmanuelle__Bustos — Fri, 21 Mar 2014 17:54:39 GMT

Closing the Post.

The problem was solved by doing a Refresh of the document and a full Reload, looks like the document was corrupted. After this the problem was solved.