Problem Definition:

The Citrix Desktop Service fails to start after upgrading to XenApp 7.11 (DesktopConfig Version 3.5.0 or newer).  When Attempting to launch a Virtual Desktop, users get "Cannot Start Desktop" message in the Citrix StoreFront.  The following errors are logged in the Event Viewer on the upgraded Citrix Server:

Event ID 1026

Application BrokerAgent.exe

Framework Version v4.0.30319

Description: The process was terminated due to an unhandled exception

Event ID 1000

Faulting Application name: BrokerAgent.exe, version 7.11.0.11

Faulting module name: KERNELBASE.dll

Exception code:0xe0434352

Cause:

The root cause is under investigation.  To work around this issue, follow the Resolution below.

Resolution:

Uninstall the Citrix Monitor Service VDA Plugin.  This must be done from a PowerShell console as this service is not specifically listed in the Programs and Features.  From the Virtual Machine console of the affected Citrix Service, open PowerShell and type the following:

$MonitorPlugin = Get-WmiObject win32_product | where {$_.Name -eq "Citrix Monitor Service Vda Plugin"}     </ENTER>

$MonitorPlugin.Uninstall()     </ENTER>

The Citrix Desktop Service will automatically start after removal of the Monitor Plugin.  Restart the Citrix Server.  Users will be able to logon after restart.

Additional Information:

CloudConnect will provide additional guidance once the root cause has been determined.

Applies To:

Microsoft Windows Server 2008 R2

Microsoft Windows Server 2012 R2

Microsoft Windows Server 2016

Citrix XenApp 7.11

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