topic Re: QlikView server crash - User sessions multiplying in QlikView

QlikView server crash - User sessions multiplying

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

Our QlikView server is hosted on a Windows server 2012, 64 Go RAM, 2.19 GHz, 4 Core, with all QV services installed on it.

Approximately 180 users but generally 15 to 30 users connected simultaneously.

All the settings in the QMC are in the attachment below .

Sometimes the server is slowing down and then worse, no user could load any application on their screen (the screen stays white, it's not the "session lost" error).

The RAM & CPU usage on the server increased exponentially (QVS.exe service).

Last time it happened, we went to the "QVS Statistics" to see how many people were connected (approx 20).

We have noticed that the "Number of Sessions" and the "Number of Documents" were unusually high (see bellow).

5 min later :

In this case, most of the users (90%) have access to one QlikView application only and the rest maximum 2 application.

Also when I checked users who had the most important number of sessions or documents, they were not connected since 2 hours minimum but the server specify open sessions for them.

So it's like the server is keeping all the sessions open and worse, multiplying them.

What do you think is causing this ?

Could it from a graphic with too much data to load ? a big Excel export ? Bad config of the server ?

We’ve also test the « Allow Only One Copy of Document in Memory» option but checked or not, the problem is still present.

A document timeout of 60min is also specify.

We’re facing this issue since 2 weeks now and the accesspoint become inaccessible around 3 time / day (the server is running since 2 years now but we always have performance issues with a lot of "sessions lost" from user).

Thanks for your help.

Regards

Re: QlikView server crash - User sessions multiplying

Peter_Cammaert — Tue, 03 Oct 2017 13:35:23 GMT

Which version of QlikView Server are you running (including the SR number)?

Your server allows for Server objects. On all documents? Is there any relation between the Server eating all CPU cycles and RAM, and particular users creating/opening "dangerous" server objects?

IMHO the increasing number of active sessions on one document may be caused by end-users (which are not known as a very patient kind of people ) launching new browser sessions when the earlier ones appear to be stuck.

Re: QlikView server crash - User sessions multiplying

l_denivelle — Wed, 04 Oct 2017 08:38:52 GMT

@Your server allows for Server objects. On all documents? Is there any relation between the Server eating all CPU cycles and RAM, and particular users creating/opening "dangerous" server objects?

We didn't teach our users how to create objects and let's say they are not "expert" in computing so it's unlikely they did.

@IMHO the increasing number of active sessions on one document may be caused by end-users (which are not known as a very patient kind of people ) launching new browser sessions when the earlier ones appear to be stuck.

I had also an increase in number of sessions for myself yet I just opened 2 application and didn't click anywhere. Just opened them to see if they were working. It's possible the users refresh many times and open other browser but in my case it's not the problem

Re: QlikView server crash - User sessions multiplying

l_denivelle — Wed, 04 Oct 2017 08:43:31 GMT

For information, we put a limitation for session timeout and it seems to work for now (no crash since yesterday morning ). It's weird because we never put a value in here and we never had problem until now. I don't know if it could be the reason but we updated our QlikView server from version 11 to version 12 recently... (1 month ago).

Re: QlikView server crash - User sessions multiplying

l_denivelle — Wed, 11 Oct 2017 14:06:18 GMT

Even with the session timeout limitation we still have the sessions multiplying.

Any idea someone ?

Last solution would be to re-install QlikView 12...

Re: QlikView server crash - User sessions multiplying

rwunderlich — Wed, 11 Oct 2017 14:22:14 GMT

I would talk with QT support if you have not already,

-Rob

Re: QlikView server crash - User sessions multiplying

l_denivelle — Wed, 11 Oct 2017 14:41:18 GMT

I didn't.

Thank you !

Re: QlikView server crash - User sessions multiplying

l_denivelle — Thu, 09 Nov 2017 10:07:35 GMT

The problem was coming from old bookmarks... Maybe they were calling fields that don't exist any more.

When users called them, they make the server crashed by multiplying sessions.

Re: QlikView server crash - User sessions multiplying

Peter_Cammaert — Thu, 09 Nov 2017 10:13:00 GMT

Thanks for reporting back on the cause of this anomaly. To me this sounds like a serious bug in the QVS...

Re: QlikView server crash - User sessions multiplying

navpinto — Wed, 04 Apr 2018 14:53:23 GMT

Hello,

We are facing this issue in QV 12.20 November 2017 SR3.

Someone have the solution?

Thanks.

Re: QlikView server crash - User sessions multiplying

Peter_Cammaert — Mon, 09 Apr 2018 08:21:20 GMT

Most probably and in case you moved from older documents versions to new releases, or from an old server release to 12.20, you should delete all server bookmarks and let them be created anew.

You can do so in the Management Console in tab Documents->User Documents->Your document->Server->Server Objects.

If you have time to figure out which server objects are causing you problems, then you should do so. But that may require time and effort as it's not a straightforward process. Just deleting them may be more efficient.