We are experiencing the same issue on a larger scale. We have approx 50 users on our pilot View program and everyone receives the following message throughout the day "Network Connection Lost" which is a message box popping up from the zeroclient. The message appears for a few seconds and then lets the user resume doing their work. If the message pops up for longer then a few seconds then the user is disconnected and kicked back out to the Zeroclient connection screen. Sometimes they can log right back in and resume work other times they may receive the message that no desktop source is available. At that point they have to wait a little while then log back in.
We once saw this happen to a user while we were remoting into their system via a third party remoting tool. On the remoting side the virtual desktop locks itself so you see the windows box saying that so and so user is logged in only that user or a administrator can unlock the system. Meanwhile the user is sent back to the zero client login screen with a message saying "Session Lost!"
We have a open SR with Vmware for the past 4 weeks and still have been unable to resolve the issue. Technicians believe it could be caused by a network problem. We have 1GB connections at least all the way from the zeroclient to the virtual desktop and all in the same building. Continous network monitoring never shows bandwidth or utilization ever maxing out.
If I were you least rule out basic networking at that user's port since you only have one user with the problem. Check the port make sure its configured to Auto if the port is running 1GB. Make sure the zeroclient is set to Auto. Change out network cable, Monitor Switch, Monitor users port etc.
Something for you to consider if you haven't already, we had a sister company that experienced a very similiar problem which in the end they resolved. Their disconnects were being caused by their HP SAN which showed the storage processors at very high utlization. If you haven't already, if you have a SAN, make sure to analyze that particluar user's datastore or whatever disk are hosting their Virtual machine. Monitor it to see if the disk latency is ever reaching 30MS. You can even use ESXTOP on the ESX host to monitor the LUN or disks to at least rule storage as a possible culprit.
Below are some of the configurations we are using, please let me know what you are using that is similiar to us, perhaps we have something in common that not alot of other users have and could be key to the problem. If we don't resolve this issue soon this may be the end of our View days.
ESXI 4 Update 1
View 4.01
Virtual Center 4 running on Windows Server 2008 R2 64bit
View Connection Server running on Windows Enterprise 2003 64bit
ESXI running on HP Blade Servers inside a HP Blade Enclousure
Cisco Switches end to end
Zero Clients are Dell FX100 running Teradici firmware 3.1.2
Storage is running on EMC Clarion SAN, OS running on Fiberchannel 15k Drivers Raid 10
Virtual Desktops running Windows XP SP3, Typical software Symantec Endpoint, Cisco Clean Access Agent
