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Communication problem after updating from SP28 to SP32 - need to change the hostname from a long one to a short one

  • October 31, 2025
  • 1 reply
  • 20 views

Hello CV Community!

 

I've had a similar problem in other environments before, but I didn't investigate further.
 

Currently, after upgrading from SP28 to SP32, a communication problem occurred in one environment for an OLVM backup.
 

The logs show entries like these:
 

vsbkp.log

20252 4f1c 10/30 13:13:59 1413471 CVClient() - File[Client.cpp], Line[105] netHostName[ABC.XYZ.com]: Warning, deprecated call to lookup client using net hostname. Please use shortname instead
20252 4f1c 10/30 13:13:59 1413471 NetMessage::verifyResponseHeader() - Error Code [10485792] returned - [Error: AppLookupClientWithHostName errorCode[1] message[Unable to lookup client with hostname. Please check if CS has duplicate clients with hostname[ABC.XYZ.com].].
20252 4f1c 10/30 13:13:59 1413471 ClientInterfaceNet::lookup() - Error: AppLookupClientWithHostName errorCode[1] message[Unable to lookup client with hostname. Please check if CS has duplicate clients with hostname[ABC.XYZ.com].].
20252 4f1c 10/30 13:13:59 1413471 SENDCOMPDCHANGE sendDirChange: failed to get media agent version information for [ABC.XYZ.com]
 

After changing the "long" FQDN hostname to a "short" one, the problem stopped. However, I'm wondering what's causing this. Has something changed since SP32 and the "long" hostname isn't supported and must be a "short" one or an IP address?
 

It's possible that in some environments, changing the hostname from a long name is not possible.

Thanks in advance!

 

Kind Regards,
Kamil

1 reply

dude
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  • Byte
  • 354 replies
  • October 31, 2025

Can you check if you have a duplicate client configured?

"Error: AppLookupClientWithHostName errorCode[1] message[Unable to lookup client with hostname. Please check if CS has duplicate clients with hostname[ABC.XYZ.com"

When looking at 11.32 hotfixes I see this which appears to relates to your issue 

Duplicate VM client gets created when there are packages installed with short hostname on the VM.

 

 

If that is the case, I would run the Merge Client workflow to try to resolve the duplicate.