“Cannot Generate SSPI Context” error message, more comments for SQL Server

Artículo
10/14/2005

Users sometime see the “Cannot Generate SSPI Context” error message. A very good source for troubleshooting the error is https://support.microsoft.com/default.aspx?scid=kb;en-us;811889. You can also find good information at Using Kerberos with SQL Server.

Here, I talk about one extreme situation: SQL server was running under Local System and was shutdown accidentally. The user then decides to run SQL server under a different account, e.g local account, domain account etc., for whatever reasons. Then he/she hit this “Cannot Generate SSPI Context” error when the client tries to connect the server. Keep in mind this only happens when TCP is enabled for the SQL server and is used by the client to connect the server.

What happened here is: When SQL server ran under Local System, it had successfully registered the Service Principle Name (SPN) for the service. The SPN is kept in the Active Directory and should be de-registered when the server is shutdown. Due to the accidental shutdown, SQL server failed to de-register the SPN. When the client connects to the server using TCP, it can find the SPN in the Active Directory and Kerberos will be used to perform the security delegation. However, the new account is not the correct container of the SPN, and Kerberos will fail.

When this happens, some people may choose to reinstall SQL Server or even the whole OS. They may be frustrated by the fact that the problem is still there if local or domain account is again chosen as the service account. The SPN in the Active Directory won’t go away even if you reinstall the OS.

Setspn.exe can be used to register/de-register SPNs. One can register the same SPN for the same container more than one time. The registration beyond the first registration may not do anything. One de-registration will remove the SPN from Active Directory totally. Because of this, the easiest first step to troubleshoot “Cannot Generate SSPI Context” is to run SQL server under Local System account and gracefully shut it down. You can then change your service account to whatever you want. SPN will not be registered and clients will fallback to use NTLM.

Also note that, if you made any change related to SPN or service account on the server, the cached information on the clients may need a couple of minutes to go away. You may see some inconsistent information during this period. Just wait several minutes in this case.

Xinwei Hong, SQL Server Protocols

Disclaimer: This posting is provided "AS IS" with no warranties, and confers no rights

Comments

Anonymous
April 05, 2006
I've been dealing with Kerberos delegation setup with respect to
Microsoft's CRM 3.0 product and while...
Anonymous
May 09, 2006
The “Cannot generate SSPI context” issue is described by http://support.microsoft.com/?id=811889 in general....
Anonymous
May 27, 2006
I had an accidental shut down of my system.
(my sql server and client are on the same machine).
Due to which i m unable to connect to the sql server.
it is showing me the "cannot generate sspi context" message.
please help.

thanks
Anonymous
May 28, 2006
Key things I would do is download the setspn tool from link above. Insure your SQL Server service is started. Next try to delete all the SPNs you see for this instance of SQL using the setspn tool (read KB article 811889 to determine how to do this). If you cannot delete the SPNs, then the SPNs are assigned to some domain user account and you need a domain administrator to delete it. Delete all SPNs for the SQL Server instance, then stop and restart SQL. Next, use the setspn tool to see if the SPN is re-created. If the SPN is recreated, then everything should work fine at this point. If the SPN is not created at this point, you will need to contact the domain admin and have him or her create the SPN under the account that the SQL Server service is running under.
Anonymous
June 07, 2006
I have a saparate test machine to test the new
updation for my programmes.Therefore i have the client and server on the same machine and it was working fine till yesterday.Suddenly i got the above message "Cannot generate SSPI Context" error message when i expanded my local server.
Anonymous
June 07, 2006
Hi, Mahesh

Can you describe more specifically about your problem?

Try the solution that Matt Neerincx suggested above.

Thanks!
Ming.
Anonymous
November 19, 2006
Hy, i have the same problem and in my case the probelm was the antivirus (Trend Micro - OfficeScan). I desable the antivirus firewall and it works perfectly. PS. Sorry for my english.
Anonymous
December 02, 2006
In this post, I focus on how NTLM and Kerberos are applied when connecting to SQL Server 2005 and try
Anonymous
January 01, 2007
The comment has been removed
Anonymous
January 09, 2007
how come i resolve thiz Problem in SQL 2000 ON XP MACHINES...... Error message......0x80004005. Description..........Can't generate SSPI CONTEX......
Anonymous
March 09, 2007
Got the same message with my local server when logging in with my windows account(admin on the machine). I finally simply logged in as "sa", then exited cleanly. It did it. Everything is fine now.
Anonymous
April 12, 2007
//Create Procedure for searching data's create proc batchShip_Search(@bId int,@dtFrom datetime,@dtTo datetime) as begin if(@bId=' ' and @dtFrom=' ' and @dtTo!=' ') begin select bId,custName,dt from batchShip1 where dt<=@dtTo order by dt end else if(@bId=' ' and @dtFrom!=' ' and @dtTo=' ') begin select bId,custName,dt from batchShip1 where dt>=@dtFrom order by dt end else if(@bId=' ' and @dtFrom!=' ' and @dtTo!=' ') begin select bId,custName,dt from batchShip1 where dt>=@dtFrom and dt<=@dtTo order by dt end else if(@bId!=' ' and @dtFrom=' ' and @dtTo=' ') begin select bId,custName,dt from batchShip1 where bId=@bId order by bId end else if(@bId!=' ' and @dtFrom=' ' and @dtTo!=' ') begin select bId,custName,dt from batchShip1 where bId=@bId and dt<=@dtTo order by bId end else if(@bId!=' ' and @dtFrom!=' ' and @dtTo=' ') begin select bId,custName,dt from batchShip1 where bId=@bId and dt>=@dtFrom order by dt end else if(@bId!=' ' and @dtFrom!=' ' and @dtTo!=' ') begin select bId,custName,dt from batchShip1 where bId=@bId and dt>=@dtFrom and dt<=@dtTo order by dt end end //Given data's which is searching batchShip_Search '1','2007-12-01','2007-12-30'
Anonymous
April 30, 2007
hi i have the same problem but i did everithing that read in google, other idea thanks
Anonymous
May 21, 2007
I had an accidental shut down of my system. (my sql server and client are on the same machine). Due to which i m unable to connect to the sql server. it is showing me the "cannot generate sspi context" message. please help.
Anonymous
May 22, 2007
The comment has been removed
Anonymous
July 31, 2007
Sql works fine on other windows enviroment but it sometimes gives the error on only WinXp machines on my Network. Kindly
Anonymous
August 01, 2007
Please post a question on our forum: http://forums.microsoft.com/MSDN/ShowForum.aspx?ForumID=87&SiteID=1 Use the guideline at: http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=362498&SiteID=1 Then, we can find out what's the root cause.
Anonymous
January 14, 2008
I've been trying to debug this error for days now on my test servers. I have IIS on a webserver, then SQL Server 2005 on a second server. They are not part of a domain and are stand alone servers as these is usual for a web application. Both servers are 2k3. I have duplicate users on both servers. The servers are directly connected to each other with no AD running. Currently I am testing with them directly connected, but will be placing a firewall between them on the production set up. Now, if both servers are part of the same domain, this works fine, but who wants a web server in your domain? As it is extremely unsecure to house a sql server on your web server and not firewall off the sql server, one would think that this type of set up would have been made a little more simple to accomplish. I'm basically beyond frustrated with this. I am no longer sure where to start over at. I'd reformat and reinstall both servers if I'd think that that would help, but I don't because it's never worked. LOL
Anonymous
January 14, 2008
Can you please check my other blog and try the step? http://blogs.msdn.com/sql_protocols/archive/2007/05/12/connecting-to-sql-server-from-a-workgroup-using-windows-authentication.aspx If you have firewall between two machines, you have to open port for NP(SMB, file sharing) and TCP (tcp port, for SQL Auth).
Anonymous
April 01, 2008
Thanks for the post. It's just to bad this wasn't on the Microsoft posting I found first.
Anonymous
May 08, 2008
The comment has been removed
Anonymous
May 20, 2008
PingBack from http://kimora.freemusiconlineindia.info/cannotgeneratesspicontext.html
Anonymous
June 05, 2008
I was about to reinstall SQL Server on my server. This article saved us hours of extra work. Thanks Here are the steps I took for our server (SQL server 2005 x64 bit SP2; OS: Windows 2003 x64 bit)

Shut down sqlserver service.
Switch the sqlserver service logon account to ’Local System’
Start up sql server service
Checked connection to sql server from my workstation (worked)
Shutdown sqlserver service
set SQLserver and sqlagent services to manual
Switch the sqlserver service logon account to ‘domain/loginid’ (DO NOT START THE SERVICE)
Rebooted the server
Started SQL service manually
Checked connection to sql server from my workstation (worked)
Switched SQL Server and SQL Agent services to automatic.

Anonymous
July 14, 2008
hi all, I got the same problem "Cannot Generate SSPI Context" when I was trying to run the application. This problem araised when the managment studio was newly installed in my system . so I tried to connect our server to the new management studio and now it is working fine :). Thank you madhuri
Anonymous
January 21, 2009
PingBack from http://www.keyongtech.com/2860107-sspi-error
Anonymous
January 22, 2010
Mine works just fine with the client fresh reboot but generate that error after couple minutes.... Tried all the above that applies to my but still no luck. Any idea???
Anonymous
March 15, 2010
hi I got the same problem "Cannot Generate SSPI Context" when I was trying to open my connection.iam using localhost as data source and Integrated security as SSPI. Please help
Anonymous
February 10, 2011
We want to rollout a new account to use for SQL Services. On a Dev server (SQL 2005 SP3, Windows Server 2003 SP2), I changed the account through SQL Configuration Manager. After restarting the services, from my remote desktop, I get an error "Cannot Generate SSPI Context" when I try to connect with Windows Authentication. 'sa' connects fine remotely, and Windows authentication is fine if I log on to the server and open SQL there. I've tried various combinations of changing services to LocalSystem, then back to the new account, rebooting between changes, doing steps in different sequence. Once or twice, it has then worked, but when I try later, I get the error again. I just changed the Service account to LocalSystem, restarted, changed to my new SQL Service Account, restarted, and it worked - I could connect. Then I rebooted the server and got the error again ?!?!?! Back to square 1 Is there a "best practice" list for changing SQL services to a new account ? MS documentation basically says just change in through Configuration Manager, nothing about "gotchas" or special steps. rebooting between changes, doing steps in different sequence. Once or twice, it has then worked, but when I try later, I get the error again. I just changed the Service account to LocalSystem, restarted, changed to my new SQL Service Account, restarted, and it worked - I could connect. Then I rebooted the server and got the error again ?!?!?! Back to square 1 Is there a "best practice" list for changing SQL services to a new account ? MS documentation basically says just change in through Configuration Manager, nothing about "gotchas" or special steps. dunncrew at hotmail dot com
Anonymous
March 12, 2012
The following fixed the issue.

Switched the sqlserver service logon account to ‘Local System’
Rebooted the server
Switched the sqlserver service logon account to ‘Domain/Account’
Rebooted the server

Anonymous
March 20, 2012
The problem for us turned out to be that Kerberos ports were blocked between the DCs.
Anonymous
October 29, 2014
Got stuck with SCCM 2012 setup due to this error in wizard log. Absolute lifesaver, thanks!
Anonymous
December 15, 2014
Just had my round with this issue and all standard solutions have failed me. So if someone bumps into this, as I did (one of first finds), and hopefully scorll comments to this one: In my case the only noticable thing that happened was windows update on that server, no accounts nor network changes. To my surprise reason for "Cannot Generate SSPI Context" was time... Not sure yet why, update and following reboot moved system time over 20min ahead. As a result it could not get authentication from domain controller. All I had to do, in fact, was to send two NET TIME commands (or one in case you have simpler infrastructure) - described in stevehardie.com/.../how-to-synchronise-your-clock-with-the-domain-controller

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“Cannot Generate SSPI Context” error message, more comments for SQL Server

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