Cannot create SSPI context

Question

I am working on a  NET application where I am trying to build the database scripts  While building the project  I am getting an error  Cannot create SSPI context    This error is shown in the output window  inside VS2008 screen  and the building process failed  Please help on this  SQL Server is configured to work on Windows authentication  amp  running as network service  these two things are must for my project    Please help on this  This error is not seems to be consistent  It was fixed in the past by restarting the machine  changing the system time to match the domain time and some suggestions in the net  Please help on this

User · Answer

It sounds like your PC hasn t contacted an authenticating domain controller for a little while   I used to have this happen on my laptop a few times    It can also happen if your password expires

User · Answer

In case you are running a code not written in your computer  that runs in a computer used by your work peer  but not in yours  check the web config  Maybe there is your colleague s name as userPrincipalName at some place that should be in blank  That happens automatically when we create a service reference to the project in VS

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I had the same issue after changing the user which was running the MSSQLSERVER-Service   To solve incorrect SPNs with SQL Server I used this tool   http   www microsoft com en-us download details aspx id 39046 - Microsoft   Kerberos Configuration Manager for SQL Server  In my case it worked pretty well

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In vb net  if you are using a linked server than check your connection string  Integrated Security true  doesn t work in all SQL providers  it throws an exception when used with the OleDb provider  So basically Integrated Security SSPI  is preferred since works with both SQLClient  amp  OleDB provide  If you still hit with error  remove the syntax completely

User · Answer

The  Cannot Generate SSPI Context  error is very generic and can happen for a multitude of reasons  Is just a cover error for any underlying Kerberos NTLM error  Gbn s KB article link is a very good starting point and usualy solves the issues  If you still have problems I recommend following the troubleshooting steps in Troubleshooting Kerberos Errors

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We had this issue on instances in which we changed the service user from Domain1 ServiceUser to Domain2 ServiceUser  The SPNs remained registered under Domain1 ServiceUser  and never registered under Domain2 ServiceUser  We registered the SPNs under Domain2 ServiceUser  but the issue persisted  We then removed the SPNs under Domain1 ServiceUser  and the issue was resolved

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If you are hosting on IIS  make sure the password for the AppPool account has not changed    If it has  then follow these steps    Go to IIS Click on Application Pools Select the AppPool of your application Right Click on your AppPool Advanced settings Identity Update Password Restart AppPool

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Perhaps you have used Integrated Security   SSPI in connection string  SSPI is used for Trusted connections using Windows Authentication hence  to work properly in windows authentication  either your system and database server should be in same domain and using same DNS server address  or should be in trusted domain   if your system and database server is in same domain  Check DNS server address of IPV4 properties in your system s network connection and provide same DNS server being used by database server

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Here is my case  I had a remote machine that hosted SQL Server  From my local machine  I was trying to access the SQL instance via some C  code and I was getting this error  My password for the user account on my machine domain had expired  I fixed it with the following    Opened the remote machine  which prompted me for a password change I changed my password within this prompt and logged into the remote machine I  locked  my local machine  using windows   L key so I didn t have to completely sign off  so that I could get back to the sign-on page I signed back onto my local machine with the new password   Everything then worked fine

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I just had the same problem and all I did was delete the user log in credentials in sql server using another user id and adding them back

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I resolved my Cannot Generate SSPI Context error by using the SQL Server Configuration Manager   Since I have SQL Server native client 10 0 on my machine  the connection to the server is trying to use named pipes  or shared memory     Other machines could run my app with no problem   When I looked at the configuration manager  named pipes and shared memory were both enabled  good    However  under alias  the name of the computer was there with TCP forced   Since I didn t know what effect changing this would have  I changed the connection string in my program to use  lt servername   lt domainname  instead   Fixed

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First thing you should do is go into the logs  Management SQL Server Logs  and see if SQL Server successfully registered the Service Principal Name  SPN    If you see some sort of error  The SQL Server Network Interface library could not register the Service Principal Name  SPN  for the SQL Server service  then you know where to start   We saw this happen when we changed the account SQL Server was running under   Resetting it to Local System Account solved the problem   Microsoft also has a guide on manually configuring the SPN

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In my case it was a missing SPN  had to run these two commands      setspn -a MSSQLSvc SERVERNAME SERVERNAME    setspn -a MSSQLSvc SERVERNAME 1433 SERVERNAME   In other words in my case I had the FQDN in there already correctly but not just the NETBIOS name  after adding these it worked fine   Well initially it didn t but after waiting 2 minutes it did

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Had a really weird instance of this  All the web products that had connection strings containing the windows computer name of the SQL server worked fine  but the products that had a FQDN with the internal domain attached gave an SSPI error  i e  COMPUTERNAME vs COMPUTERNAME DOMAIN  ping always worked as expected   This ONLY gave problems when a new SQL server was being used and hosts files pointed both the computer name and the computername as a FQDN for the connection strings   Solution in this case was to set all the connection strings to the computer name only  removing the domain references   SQL   2008R2 SQL2012  IIS   2008R2

User · Answer

I had this error- it happened because my password expired and I had to change it  I didn t notice it  because in some programs I could still log in and everything would work normally  including windows   but I couldn t log to any sql servers

User · Answer

I can able to get this resolved by resetting the domain  server machine  which is the domain server  but not related to SQL Server except domain managing  followed by the client machines    Thank you all for your immediate support

User · Answer

I also issued this problem  and the server admins solved it by following the same solution as indu teja proposed in http   www sqlservercentral com Forums Topic546566-146-1 aspx The solution proposed by indu teja says    If you get this  quot SSPI Context Error quot    The issues we face are   We will not be able to connect to SQL Server remotely  However we will be able to connect to server with local account   CAUSE  The issue might be becasue of no proper sync happenign fro the SPNs in Active directory  RESOLUTION   You need to reset SPN  Use the synytax  quot SET SPN quot   You  can check the syntax in net once  Change your sql server service account from domain account to Local account  recycle sql  and then reset again with your domain account and recycle sql server

User · Answer

This error usually comes when the Windows user account is expired and he is already logged in with old password  Just ask the user to restart his machine and check if the password is expired or he has changed the password   Hope this helps

User · Answer

It s quite a common error with a variety of causes  start here with KB 811889   What version of SQL Server  And Windows on client and server  Local or network SQL instance    Domain or workgroup  Provider  Changing password Local windows log errors  Any other apps affected

[sql] Cannot create SSPI context

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