SQLExpress 2008 R2 + Winforms Application + Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. ;

Hi All,

User is using winform application with SQL express. Application is working fine and suddenly he was seeing exception  window with data extraction error.

Exception details are :Timeout expired.  The timeout period elapsed prior to completion of the operation or the server is not responding. ; SQL exception number is -2.

Within fraction of seconds if user hits F5 application is working without any issues. I don't see any help online except that exception number -2 means firewall is blocking the connection.

I wanted to either reproduce the issue on my end or wanted to know exact reason for the error. Appreciate your response.

Thanks