How to fix System.Data.SqlClient.SqlException: Timeout expired

Question

Hi When I am trying to access my application by URL I am getting the error screen containing the below error. Previously I get it fixed by using dbcc commands in backend..bt now this is not working..

Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Data.SqlClient.SqlException: Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

here is my source code for the stored proc I am calling from my .NET application.

      USE [TCO]
GO
      ALTER PROC [dbo].[SP_TCOV3] (@year INT) AS
DECLARE @rpt_year INT;
IF @year > 2011 
BEGIN
SET @rpt_year = 2011;
END
ELSE
BEGIN   
SET @rpt_year = @year;
END
DECLARE @From_Date DATETIME='01-01-2012'  -- mm/dd/yyyy
DECLARE @End_Date DATETIME=(SELECT TOP 1 DATEADD(dd, -DAY(DATEADD(m,1,dbo.ManpowerCost.payment_date)), DATEADD(m,1,dbo.ManpowerCost.payment_date)) as value
FROM dbo.ManpowerCost order by payment_date desc)  

(
SELECT
        allApps.[Application Name],          
        '$'+(CAST((CAST(allApps.[BAM Staff Support] AS DECIMAL(10,2))) as varchar(50)))AS [BAM Staff Support],
        '$'+(CAST((CAST(allApps.[BAM Non-Shell Support] AS DECIMAL(10,2))) as varchar(50)))AS [BAM Non-Shell Support] ,
        '$'+(CAST((CAST(allApps.[BSM DBA Support] AS DECIMAL(10,2))) as varchar(50)))AS [BSM DBA Support] ,
        '$'+(CAST((CAST(allApps.[Middleware Support] AS DECIMAL(10,2))) as varchar(50)))  AS [BSM Middleware Support],
        '$'+(CAST((CAST(allApps.[IRM Logical Access] AS DECIMAL(10,2))) as varchar(50)))AS [IRM Logical Access] ,
        '$'+(CAST((CAST(allApps.[Application Licensing and Maintenance] AS DECIMAL(10,2))) as varchar(50))) AS [Application License and Maintenance],
        '$'+(CAST((CAST(allApps.[Middleware Licensing and Maintenance] AS DECIMAL(10,2))) as varchar(50)))as [Middleware License and Maintenance],  
        '$'+(CAST((CAST(allApps.[Database Licensing and T-System DBA Maintenance] AS DECIMAL(10,2))) as varchar(50))) AS [TS DBA Maintenance],
        '$'+(CAST((CAST(allApps.[Hosting and Storage] AS DECIMAL(10,2))) as varchar(50)))AS [Hosting and Storage]  ,
        '$'+(CAST((CAST(allApps.[Telecom Connection Charge] AS DECIMAL(10,2))) as varchar(50))) AS [Telecom Connection Charges],
        '$'+(CAST((CAST(allApps.[Total Application TCO] AS DECIMAL(10,2))) as varchar(50)))AS [Total Application TCO] 
FROM
        --dbo.FN_TCOV3(@rpt_year)AS allApps 
        dbo.FN_TCOV3_Report(@From_Date,@End_Date)AS allApps 

)ORDER BY allApps.[Application Name]

The same proc is working if I do not use start date and end date parameter that I have used above and call dbo.FN_TCOV3(@rpt_year)AS allApps instead of dbo.FN_TCOV3_Report(@From_Date,@End_Date)AS allApps, the only diff. b/w these two function is one takes only a year as parameter and the other takes 2 parameter namely start and end date.

I need to use both the parameters , Pls assist.

Answer 1

If your query really needs to run for a long time, you can extend the TimeOut period by setting the CommandTimeout property of your SqlCommand object ( myCom.CommandTimeout = 300; for a 5 minutes timeout ; also set the corresponding page Server TimeOut accordingly)

That said, if you don't know why your query is running that long, you have to investigate and fix it.

Search for :

• missing indexes
• locks
• inefficient algorithms