I have just created a new XenApp 6.5 farm for testing purposes.
I have deployed:
* Web interface server (v126.96.36.199) - Server 2008 R2 SP1
* Primary Data Collector - Server 2008 R2 SP1
* First Xenapp 6.5 server - Server 2008 R2 SP1 (where apps and desktops are publsihed from).
Database running on SQl 2008 R2.
I remember I had this issue when I rolled out my first XA6 farm about 2 years ago. It had me beat for months!
When trying to open either a published App or Desktop via either the web console or receiver (we will use the web console in this case), we see the following error:
I check the event viewer on the WI server and see the following error:
Site path: C:\inetpub\wwwroot\Citrix\XenApp.
The Citrix servers reported that they are too busy to provide access to the selected resource. This message was reported from the XML Service at address http://MyDataCollectorServer:8080/scripts/wpnbr.dll [com.citrix.xml.NFuseProtocol.RequestAddress]. [Unique Log ID: dd734987]
For specific information about this message, see the Web Interface documentation at http://support.citrix.com/proddocs/topic/web-interface-impington/wi-log-messages-event-ids-hardwick.html.
I check the Data Collector servers event log and see the following msg:
A usable server cannot be found on which to launch the application. Application: Test XA65 Published Desktop, Client: WI_9b9A1cSqiB6Mzhpw7 (address: Clients IP Address;;;), User s Username. Check your worker group definitions and load balancing policies to verify appropriate servers are assigned for Test XA65 Published Desktop.
No load balancing policies are in place apart from the default one. Load seems fine. There are no event log errors on the Published Desktop/App server.
If I go back to this similar issue 2 years ago in XA6, the resolution was to make sure Windows 2008 R2 Service pack 1 was installed, XA rollup packages and hotfixes were installed and it all worked. However I have replicated this in the new XA65 farm with no luck.
The only thing I can think of is that the issue is to do with the WI server.
My XA65 farm servers are running on port 8080 for XML. So I have replicated this on the WI console. See attached image:
I am not using a CSG for this test farm, so have kept the WI with all of the default settings. See attached image of access type: