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jafrullahm

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Sessions on Xenapp 6.5 Server

Hi

  For one of our Xenapp 6.5 Server I could see only one or two sessions compared to other Servers in the Worker Group which had around 20 sessions each.

This server in the same Worker Groups as other Servers.  It is not different to anything compared to other Servers..

Anything that I can check to figure out why it has very less sessions compared to others ?

All our applications are Streamed and published to a Worker Group which has all the servers.
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Casey Herman
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Drop to the command line and run

qfarm /load

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I bet you will see that you have a high load on the server in question.

You can check your load balancing policy. See if you applied a different one to that server or you applied a single one by itself to that server somehow.

Check the qfarm /load first though to confirm.

-Casey
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jafrullahm

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It is just strange, it now has got the similar sessions as the other servers in Farm.   But earlier it was not the case. Not sure what was stopping the server before but it seems alright now.  I guess I will have to monitor it.

Btw, Load balace on this server is same as rest of the servers.
Are your load balancers doing anything with disk IO?  I ran into that with mine. AV was scanning the spooler directories and when a user logged in and it was setting up print drivers it was triggering the LB to 10000

-Casey
I am still having issue with this server.  It is taking connections but very very low.  When other servers had 40 sessions it has only 5 sessions.   Task manager shows normal cpu, disk performance and no process is taking too much cpu or memory.  No events at event logs related to this.   LB was under 1000 for very long time until it has just gone to 1011 with 5 sessions. Not sure what else to look at.
Sounds like networking is the issue. Check vlans, firewall settings, DNS settings, DNS suffix, gateway and all that good stuff.

If you publish a test app to that server, does it respond as slowly as the others?

Is it virtual? Have your tried moving it to a different host?

Just some steps I would go through.

-Casey
It has everything similar to other working servers as far as Networking components are concerned. They are all Physical Servers connected to same Vlan, same location.
Slow i meant was not taking time to launch published application, i meant taking very less apps but one at a time with much less apps in total compared to the other working servers in the same period of time.  All the apps are streamed apps published on all the servers.

I just tried to launch one test app and after few seconds I clicked on the icon again and it gives me the error " The task you are trying to do cant be completed because Remote desktop services is currently busy . pl try again in few minutes. Other users should still be able to logon"  It took a while and did not launch application.
Have you installed this patch on the other servers and may have missed this one?

http://support.microsoft.com/kb/2383928

Also this problem has also been blamed on TCP offload.  You might try to disable it as a test.

Admin command prompt and type on a working server and then do the same on the problem server. Compare what you see.

netsh int tcp show global

To test

You can disable the chimney offload with this.

netsh int tcp set global chimney=disabled

Then reboot.

Set to enable to turn it back on if needed.

-Casey
Hi Casey

    Above hotfix is not on this server and I did not find it on any other servers as well.  Strangely this server is a new built server and I could see lot of MS hotfixes missing.
I think the best thing is to install all the relevent MS Hotfixes on this server coming weekend as we have a scheduled hotfix installation for the rest of the servers and see if it resolves it automatically , if not then I will try above steps and disable global chimney.
Btw, chimney offload state is set to Automatic on all the servers. What is this for ?

Thanks..
This tells the CPU to handle the network traffic which in some citrix specific documents it says to disable this for certain citrix applications.  It is worth a shot and easily turned back on.

-Casey
I have asked our Server Team to hotfix this server , they said as per SCCM the hotfixes are gone to the server but when i logged into the server and went into installed updates, I dont see anything.  It looks like this server has some issues. I will try and get it fixed.
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jafrullahm

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Logged the call with Citrix Support and they said its the issue with the RDP stack and suggested to install 2008 r2 sp1 and ms hotfixes post sp1 , which resolved the issue.