Solving a timeout error for SQL query

Question

I am getting this error:

Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.

Answer 1

Faced this problem recently and found the resolution that worked for me.

By the way, setting Timeout = 0 helped to avoid the exception, but the execution time was unreasonable, while manual execution of the store procedure took a few seconds.

Bottom line: I added SET IMPLICIT_TRANSACTIONS OFF to the stored procedure that is used to fill the data set.

From MSDN:

The SQL Server Native Client OLE DB Provider for SQL Server and the SQL Server Native Client ODBC driver automatically set IMPLICIT_TRANSACTIONS to OFF when connecting. SET IMPLICIT_TRANSACTIONS defaults to OFF for connections with the SQLClient managed provider, and for SOAP requests received through HTTP endpoints. [...] When SET ANSI_DEFAULTS is ON, SET IMPLICIT_TRANSACTIONS is ON.

So I believe that in my case defaults weren't as required. (I couldn't check that. Don't have enough privileges on SQL server). But adding this line to my SP solved the problem.

IMPORTANT: In my case I didn't need the transaction, so I had no problem to cancel the implicit transaction setting. If in your case transaction is a must you, probably, shouldn't use this solution.