CLR webservice call times out at 100 seconds - sql

Question

I have not found this answered anywhere. I have a CLR function that exectues a webmethod call of my .NET application (.asmx). The web service successfully executes when called directly but when called via the CLR it times out after 100 seconds with the following error:
Msg 6522, Level 16, State 1, Line 1
A .NET Framework error occurred during execution of user-defined routine or aggregate "fn_ExecuteReport":
System.Net.WebException: The operation has timed out
System.Net.WebException:
at System.Web.Services.Protocols.WebClientProtocol.GetWebResponse(WebRequest request)
at System.Web.Services.Protocols.HttpWebClientProtocol.GetWebResponse(WebRequest request)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at DD.WebServices.WebExec.ExecuteReport(String ddBotID, String serverKey, Int32 ddUserID, String reportReportTypeList, String deliverToUserList)
at ExecuteReport.GetResult(Int32 userID, SqlString reportList, SqlString deliverToUserList)
I have increased the web service proxy timeout in fn_ExecuteReport without effect:
WebExec svc = new WebExec();<br/>
svc.Timeout = 3600000; // set timeout to 1 hour<br/>
result = svc.ExecuteReport(userID, reportTypeList.ToString(),
deliverToUserList.ToString());
I want to capture the returned result so executing the webservice asynchronously is not a solution. Where else might I override timeout settings for the SQL CLR call? Thanks for any help you can provide.
Here's the code for the function. I'm able to execute the webservice, the timeout only occurs when executing via the CLR.
ALTER FUNCTION [dbo].[fn_ExecuteReport]
(#UserID int, #ReportTypeList nvarchar(max), #DeliverToUserList nvarchar(max))
RETURNS [nvarchar](255)
WITH EXECUTE AS CALLER AS EXTERNAL NAME [MyCLRLib].[ExecuteReport].[GetResult]
I've tried both synchronous and asynchronous calls to the web service in the CLR function and both end up with the 100 second timeout. Here's both calls that I've tried:
Synchronous:
WebExec svc = new WebExec();
svc.Timeout = 3600000; // set timeout to 1 hour
result = svc.ExecuteReport(userID, reportTypeList.ToString(), deliverToUserList.ToString());
Asynchronous:
WebExec svc = new WebExec();
IAsyncResult result = svc.BeginExecuteReport(userID, reportTypeList.ToString(), deliverToUserList.ToString(), null, null);
result.AsyncWaitHandle.WaitOne();
retStr = svc.EndExecuteReport(result);

Answer 1

Your error message suggests that the timeout is originating at SQL Server.
Have you tried updating your SQL Server statistics (or rebuilding indexes)?
Can you post the code of your CLR function?