[THIN] Re: 4.0 Session problem

  • From: "Steve Greenberg" <steveg@xxxxxxxxxxxxxx>
  • To: <thin@xxxxxxxxxxxxx>
  • Date: Fri, 17 Jun 2005 21:51:46 -0700

This sounds like the application in question may spawn a process which hangs
during a disconnect and/or causes one. We have seen this many times before
where an application goes into a certain state which prevents the session
from cleanly ending, and, grabs the processor at the same time. This
sometimes is a print process it creates, a desktop tray process, or some
other "helper" associated with a vendor's app.

 

What state does the CMC shows for these disconnected sessions ?  What
happens if you set a disconnected session to reset? Will the cleanly end the
session?

 

PS- what is the app in question?

 

 

Steve Greenberg

Thin Client Computing

34522 N. Scottsdale Rd D8453

Scottsdale, AZ 85262

(602) 432-8649

www.thinclient.net

steveg@xxxxxxxxxxxxxx

 

  _____  

From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of Lich, Brian M
Sent: Friday, June 17, 2005 7:03 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] 4.0 Session problem
Sensitivity: Private

 

Hello:

 

I am pretty new to Citrix and have a weird problem that has me stumped.

 

I am running a 7 server farm on 4.0 (recently upgraded from 3).  I had the
same problem with 3 so I was hoping an upgrade to 4 would fix it but it
didn't.  All servers are Dell dual Xeons with hyperthreading enabled,
Windows Server 2003 (non SP1).  All clients are either Windows XP or 2000
with version 8.1 of the Citrix client.  I am only publishing one application
that can serve up to 200 users through the PN agent.   Also, I have a few
computers that are accessing this through the web interface.  Intermittently
when a session disconnects, the processor will go to 25% and stay there.  I
would assume the 25% (and not 50 or 100%) is due to the hyperthreading.
Obviously, if 4 sessions are screwed up on the same server, I have a
problem.  I've set up the session to reset after 65 minutes of disconnected
or idle time.  However, the disconnected session will not always reset
itself because (I would assume) the processor is too busy.

 

I've checked with the vendor of the application and they say that it is a
Citrix problem, but the process pegging the CPU is this vendor's
application.  Does anybody have any ideas on how I can try to troubleshoot
this?

 

Thanks in advance.

Brian Lich

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