Question

I have a web portal designed in ASP.NET in which we ask customers to enter the data. On the click of submit button all i have done is, just read the data and called a stored procedure which inserts that into a table. There seems to be a problem in SQL Server 2005 while inserting the data from multiple computers at the same time. We have tested in our lab with three computers, result is that we get the data inserted successfully in only one machine and on the other two machines we get error on page.

I have used transactions in the stored procedure and also tried setting the isolation levels to READ_UNCOMMITTED, SERIALIZABLE and SNAPSHOT. Nothing seems to work properly. Am frustrated with this from past one day. Any help highly appreciated.

Thanks,
Manoj

Answer 1

You might wanna consider deadlocks. This usually happens when multiple users use the stored procedure simultaneously. In order to avoid deadlock and make sure every query from the user will succeed you will need to do some handling during update failures and to do this you will need a try catch. This works on Sql Server 2005,2008 only.

DECLARE @Tries tinyint

SET @Tries = 1

WHILE @Tries <= 3

BEGIN

  BEGIN TRANSACTION

  BEGIN TRY

  -- do your insert statement here

   COMMIT

   BREAK
  END TRY

  BEGIN CATCH

   SELECT ERROR_NUMBER() AS ErrorNumber, ERROR_MESSAGE() as ErrorMessage

   ROLLBACK

   SET @Tries = @Tries + 1

   CONTINUE

 END CATCH

END