XenApp 6 – Hotfix XA600W2K8R2X64003, 17, 26
Many people are implementing XenApp6 these days, and i highly recommend to keep getting updated informations from Citrix Support (http://support.citrix.com)
Please apply following hotfixes in your XenApp 6 environment:
Servers running XenApp 6 can become unresponsive while shutting down. The issue occurs when when the picadm.sys driver encounters certain error conditions that prevent it from shutting down gracefully
This fix addresses session reliability issues that can occur when using multiple, disparate client devices to reconnect to the same session.
Attempts to log on to a XenApp 6 server using Version 7 or earlier of the clients can cause svchost.exe to exit unexpectedly. As a result, further connection attempts to the server fail until it is restarted.
( Issue with XenApp 6 hangs, people are seeing -> http://forums.citrix.com/thread.jspa?threadID=273399&start=45&tstart=0 )CTX127360 fix, this issue