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SQL Server 2008 R2 - Error: 18056, Severity: 20, State:29.

Posted By:      Posted Date: October 18, 2010    Points: 0   Category :Sql Server


We are seeing errors in the SQL Server Error Log like the following:

Date  10/17/2010 11:12:10 PM
Log  SQL Server (Current - 10/18/2010 8:01:00 AM)

Source  spid401

Error: 18056, Severity: 20, State: 29.

Date  10/17/2010 11:12:10 PM
Log  SQL Server (Current - 10/18/2010 8:01:00 AM)

Source  spid401

The client was unable to reuse a session with SPID 401, which had been reset for connection pooling. The failure ID is 29. This error may have been caused by an earlier operation failing. Check the error logs for failed operations immediately before this error message.

During this time our applications are unable to connect to SQL server and are systems expericnce a significant slow down.  Our applications report the following error in the Windows Event log during the same time the error messages are logged in SQL:

"System.Data.SqlClient.SqlException: 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 ant that SQL Server is configured to allow remote connections.  (provider: TCP Provider, err: 0 - The wait operation timed out.)"

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