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Connection Failure First Couple Logins After Server Restart


Darryl Sakach

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We have Server 2019 Version 1809 and Server 2016 Version 1607 images. Generally all is working very well, but we have one connectivity issue. The first 1-2 logons after a restart fail. It does not matter if the VM was restarted 10 minutes or 10 hours ago, the first couple logons still fail. The failure behavior is that the VDA starts to open with the Connecting screen, but then disappears.  If you soon try again (within a minute or two) the Session Reliability Lost Network Connection popup appears and the connecting screen disappears again. By the third try all normally goes well and the problem does not reoccur until the VM is restarted again. We have Session Reliability configured and have HDX Adaptive Transport set to Preferred. The connection conditions result in a UDP connection being made. These UDP connections work fine subsequently. 

 

What I have tried that has not resolved the issue:

 

Event Log Entries that may be of interest, both from VDA:

  • The Citrix ICA Transport Driver connection from nn.n.nnn.nn:51997 to port 2598 received an invalid packet during its SSL handshake phase.

  • Invalid ACR cookie. Terminating connection.

 

Configuration:

 

  • App Layering ELM, OS Machine Tools and PVS Agent are all 20.11
  • VDA, PVS and Workspace App  are all 1912 CU2 
  • Delivery Controllers 7.15 CU5
  • NetScaler 13.0 71.44 
  • VMWare 6.7
Edited by Darryl Sakach
Found issue occurs for Server 2016 image as well.
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  • 4 months later...

I'm having the same issue with a major application, Citrix support seems to have no idea what the cause is. It's causing a lot of issues, users need to launch apps 3-4x on specific 2019 servers for the app to successfully launch. We're using DC 1912.CU3 and 2106 VDAs, Netscaler 13.0-82.45, and it happens to internal and external users. Same errors in the event log as well. 

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We continue to experience this issue. It seems that a logon must fail on a server and then the issue on that server goes away. If there are multiple servers in a DG a logon must fail on each one before the next logon will be successful.

 

Since starting this thread we have updated a few components, but the problem persists.

 

  • App Layering ELM, OS Machine Tools and PVS Agent are all 20.11
  • VDA, PVS and Workspace App  are all 1912 CU2 
  • Delivery Controllers 1912 CU2
  • NetScaler 13.0 71.44 
  • VMWare 6.7
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