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