Master db stuck in single user mode

  • We have a SQL 2008 R2 instance where the Master db seems to be in single_user mode. I say it that way because the SSMS GUI and sys.databases report Master to be in single_user, but at the same time sp_who2 shows multiple connections to Master.

    An attempt to Alter Master to a different state results in "Option 'MULTI_USER' cannot be set in database 'master'" Restarting the instance has no effect.

    Has anyone seen this before? thanks

  • Ken Davis (9/30/2011)


    We have a SQL 2008 R2 instance where the Master db seems to be in single_user mode. I say it that way because the SSMS GUI and sys.databases report Master to be in single_user, but at the same time sp_who2 shows multiple connections to Master.

    An attempt to Alter Master to a different state results in "Option 'MULTI_USER' cannot be set in database 'master'" Restarting the instance has no effect.

    Has anyone seen this before? thanks

    what's the errorlog look like?

    this sounds similar to this thread:http://social.msdn.microsoft.com/Forums/en-US/sqldatabaseengine/thread/47e5e584-b35a-45d1-9d75-709425583867

  • It's completely clean. Nothing out of the ordinary.

  • Ken Davis (9/30/2011)


    It's completely clean. Nothing out of the ordinary.

    can you post the error log from the point of a startup? the server isnt starting in single user mode right?

    did you do an upgrade recently or something like that? what preceded this problem?

  • you probably have a start-up parameter that should not be there. Post the errorlog as already requested, 99% chance the explanation will be in there.

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