KDC_ERR_S_PRINCIPAL_UNKNOWN

Audun M. Solheim — Wed, 13 Apr 2011 14:27:39 +0000

I got this error in the event log on a fresh Sharepoint Server 2010 February Cumulative Update installation:

A Kerberos Error Message was received:
 on logon session
 Client Time:
 Server Time: 17:6:26.0000 4/2/2011 Z
 Error Code: 0x7 KDC_ERR_S_PRINCIPAL_UNKNOWN
 Extended Error: 0xc0000035 KLIN(0)
 Client Realm:
 Client Name:
 Server Realm: DOMAIN.LOCAL
 Server Name: MSSQLSvc/sqlserver.domain.local:1433
 Target Name: MSSQLSvc/sqlserver.domain.local:1433@DOMAIN.LOCAL
 Error Text:
 File: 9
 Line: f09
 Error Data is in record data.

Solution:

The error is due to a dual SPN entry. I found this with

ldifde -f dump_spn.txt -d "dc=domain,dc=local" -p subtree -r "(servicePrincipalName=MSSQLSvc/sharepointsql*)" -l servicePrincipalName

I found that another account in addition to the SQL Server Service account had registered a SPN.

This was removed with adsiedit.msc: Navigate to the correct OU/User, and remove the servicePrinicpalName entry.

Restarting http.sys on Reporting Services server

Audun M. Solheim — Thu, 03 Jun 2010 13:31:31 +0000

I recently had to restart the http service on a server to get some configuation changes active without having to restart the server. This was a Windows Server 2008 R2 server with SQL 2008 and Reporting Services installed. This server has not IIS installed, but is using http.sys to deliver the web pages in Reporting Services.

Anyway, when restarting the http service with

net stop http

I got error message “The http service could not be stopped.” Trying net stop http or net start http only gave error message “The service is starting or stopping. Please try again later.”

I couldn’t find any related process to kill, and was thinking I had to restart the server.

Solution

Just to try it, I stopped the SQL Server Reporting Services Service, and voilá! I could stop the http service.

The UC Corner » SQL

KDC_ERR_S_PRINCIPAL_UNKNOWN

Restarting http.sys on Reporting Services server