The last few days we see this error message in our website too much:
"Timeout expired. The timeout period
elapsed prior to obtaining a
connection from the pool. This may
have occurred because all pooled
connections were in use and …
I know this is almost a duplicate of : The error "Login failed for user 'NT AUTHORITY\IUSR'" in ASP.NET and SQL Server 2008 and Login failed for user 'username' - System.Data.SqlClient.SqlException with LINQ in external project / class …