We experience database access problems after upgrading to CU December 2011
due to User Profile Synchronization problems.
One of two frontends seems to be unable to access the database in correct manner:
It shows following problem in the Event Viewer:
A network-related or instance-specific error occurred while establishing a connection
to SQL Server. The server was not found or was not accessible. Verify that the instance
name is correct and that SQL Server is configured to allow remote connections. (provider:
Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
Named pipes access isn't enabled on that database, but hasn't been enabled before
the upgrade and doesn't pose these problems on the other frontend. We reran the
config wizzard without any problems to no avail. We haven't dis- and reconnected that
frontend to the farm.
Is there any chance to use TCP/IP access as before and how do we enable that?
Markus