CAS problem with abnormal memory increase

[Peter Machala]

Hello,
I'm facing problem with abnormal virtual memory increase of CAS server application, which leads to problems with login via CAS(loading CAS page is too long). Virtual memory of CAS process raises up to 20 GB. I hope someone was facing same or at least simillar issue.

My architecture is following:

               CAS server (v. 5.1.8)
               (SAML2 protocol)
               /                      \
                /         \
                       APP1         APP2
            CentOS        Oracle weblogic server

Here are steps what I'm doing in my Jmeter performance test to simulate this issue.
1.  go to APP1 and login
2.  redirect to CAS server and after successfull login redirect back to APP1
3. click on link to APP2
4. APP2 redirects to CAS server and return back to APP2

If skip steps 3. and 4. the memory problem disappears. So I'm deducing that something is wrong with Oracle weblogic server.

Can be realy Oracle weblogic server the problem? Or it needs some additional configuration? Have you experienced something like this?

Thanks for reply.

Peter

[Uxío Prego]

Apart from the virtual memory increase, which is the profile of actual memory use increase and (if applicable) swap space use increase?

In other words, are you really sure a virtual memory use increase is a problem?

Which is the operating system where you are running that?

Uxío Prego

             

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[Peter Machala]

Thanks for your reply.

Maximum actual memory use is set to 2GB and swap space is not used. I have allready tried to increase actual memory and also add swap space but it didn't help.

To be honnest I'm not 100% sure that virtual memory is problem, I'm deducting that problem is weblogic becacouse without it virtual memory is not increasing so much and everything seems to be working well.

I'm running at Red Hat Eneterprice Linux Server 7.3 and CentOS Linux release 7.4.1708(Core)