Hi,
We have installed on two brand new Windows Server 2012 R2, one for TFS 2015 application tier and one for SQL 2014 with SP1.
We copy the DB from a TFS 2012 and upgraded it to TFS 2015.
Everything worked fine for almost 10 days, than users started to get the TF53001: The database operation was canceled by an administrator.
We look at the events on the server which host TFS 2015 application tier.
The first TF53001 was associated to the exception message: Target principal name is incorrect, Cannot generate an SSPI Context.
After trying to find a solution for an hour, since we have 300 users which are waiting for the service to come back, we decided to reboot both servers.
During the shutdown of the SQL server, we found in the log the following messages: The SQL Server Network Interface library could not deregister the Service Principal Name (SPN) [MSSQL.Svc/our.server.name] for the SQL Server service. Error: 0xffffffff, state 63. Administrator should deregister this SPN manually to avoid client authentication errors.
Since the reboot (last friday), both servers look to be working fine, but we don't know what cause the problems and how to prevent the issue to reappear again?
After publishing the question on the TFS Forum, they think it's more an SQL issue.
Regards,
Huy