Friday, April 1, 2016

Launching XenApp 7.8 application published through NetScaler 11 fails and throws the erorr: “Cannot connect to the Citrix XenApp server.Socket operation on non-socket”

Problem

You have successfully published applications on a XenApp 7.8 application server through a NetScaler but noticed that while you are able to log into the portal and view the published applications, you receive the following error when an application is launched:

Unable to launch your application. Contact your help desk with the following information:

Cannot connect to the Citrix XenApp server.Socket operation on non-socket

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Attempting to launch the desktop of the application server throws the following error:

Desktop Viewer

The connection to “Citrix XenApp” failed with status (Unknown client error 1110).

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Solution

One of the reasons why this error would be thrown is if you have not defined at least one STA server in the created NetScaler Gateway Virtual Server:

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Notice that the screenshot below states No STA Server under the Published Applications section:

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The error should no longer persist once a functioning STA server (the FQDN of your XenDesktop / XenApp Delivery Controller) is configured.

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