We have been using XD7.7 with PVS since October now. Since a couple of months, we are running into unexpected behavior where the server and sessions become unresponsive. The frequency of the issue is about one random server a month (we have a total of 4 servers). While the issue is occurring the server will not let you logon -- the logon process hangs while loading your profile, we can't logoff any active users, existing sessions become unresponsive. In the director, we start to have users stucked with "Application not running" sessions.
We are able to log in with VSphere console (after couple of minutes), but not via RDP.
I can't find anything useful in the Event log, no error in systems/apps/citrix beside this one:
"ICA Connection request denied because the current user, domain\username, is not the owner of the Session, domain\username". Where domain\username was the username of an account on our network
OS: Windows 2012 R2, fully patched.
VDA Version: 18.104.22.16811
There is no memory/CPU peak, either on VMWare or from data collected with a perfmon.
Any help would be really appreciated.