Citrix Broker Service Failed to Broker a Connection

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I am running into issues in with users are unable to get applications. This seems like the 1st attempt to broker a connection and with subsequent retries the user will eventually get their application. I have 11 XenApp servers each with 12GB of RAM 4vCPU. There definitely are resources available. Ironically I received this alert even after adding an 11th XenApp server.

XenApp 7.13, 7.13 VDA, PVS 7.11 Server 2012 R2

The Citrix Broker Service failed to broker a connection for user CORP\fragon to resource Citrix OH Wordpad. The Citrix Broker Service cannot find any available virtual machines.

Please add more virtual machines to the site. If the problem is due to existing virtual machines not becoming available, see Citrix Knowledge Base article CTX126992.

The Citrix Broker Service failed to determine the base settings needed for the Virtual Desktop Agent of machine .

Please restart this machine and if this problem persists, see Citrix Knowledge Base article CTX126990.

Exception Type: Citrix.Cds.Protocol.Constants.SessionProtocol

Parameter name: enumStr of type System.ArgumentNullException.

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Are you seeing any licencing errors in your studio?

And how are your load  figures looking (Will need to add it to view in Studio)

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I am not seeing any licensing issues in Studio. We have 1200 licenses in total and only 300 are in use right now.

I am not sure where the load figures view is in Studio? I looked all over.

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you will need to add it to your view when looking at a delivery group

might be chasing ghosts but seen load evaluators flake out with all sorts of weird results

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Any resolution?  Seeing similar issues, curious if you found a resolution?

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Hi All, We are also getting Event 1101 on Controllers in our Environment. Till now no solution found. And these warnings not impacting any issue for end users.

Can anyone help on this to find out the cause for the events.

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So it seems Ive found the thread where other users have the same issue that Im seeing as well, with no concrete resolution mentioned.  In our case the 1101 errors just started showing up today on a particular delivery group, this is the first time weve gotten them since last October – roughly three months ago.  So the sporadic nature is a bit puzzling.  The delivery group in question is a pool of 40 XenApp Session Hosts running published apps, they are non-persistent servers streamed by PVS, and they reboot nightly.  The 1101 errors also seem to coincide with users getting an error when attempting to launch the application that the remote session was disconnected because there are no Terminal Server License servers available to provide a license

The previous admin wasnt aware of the 1101 errors on the delivery controllers, and apparently the problem was a bit more pronounced in the past – he tried to alleviate the issue by setting a script to restart the Citrix and RDS license services each night as well.

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