Linux VDA: Unable to register to DDC "Exception:System.NullReferenceException"
Article ID: CTX328175
Updated On:
Description
[BrokerAgent] [Error] RegistrationManager.AttemptRegistrationWithSingleDdc: Failed to register with xxxx .. Citrix/CdsController/IRegistrar Exception:System.NullReferenceException, Object reference not set to an instance of an object.
Resolution
Make sure VDA IP PTR record matches the VDA host FQDN.
or
Create a VDA PTR name to VDA KRB5 REALM mapping in DDC using ksetup
or
Create a VDA PTR name to VDA KRB5 REALM mapping in DDC using ksetup
ksetup /addhosttorealmmap fqdn-of-vda-from-IP-PTR REALM-OF-LVDA
Problem Cause
- DDC and LVDA were part of two different AD Domains.
- PTR record of VDA IP was different from VDA host FQDN.
- Due to the above configurations DDC was not able to find KRB5 PRINCIPAL it built from the PTR record of VDA IP.
- DDC will get KDC_ERR_S_PRINCPAL_UNKNOWN error when it tries to connect to VDA for registration.
- This can be visible in Network traces collected in DDC.
Additional Information
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