SSRS problem getting ASP.NET session has expired

when viewing the report in report viewer we get the following error ASP.NET session has expired

we use .NET 2005 ssrs 2005

well we have a report developed and hosted on SSRS server which is same as application server for ASPX applications

in our web application the default.aspx have a report viewer that shows the report

deployed on test server where the link to the application is http://testserver/appname and report server link is http://testserver/reportserver

every thing is working fine

in production server

we have different sitename for the application which is http://applicationname in production each application is defferent site

so here we have http://applicationname for the webapplication and http://servername/reportserver for the report

here the report viewer is not showing the report but giving the following error

ASP.NET session has expired

AspNetSessionExpiredException: ASP.NET session has expired] Microsoft.Reporting.WebForms.ReportDataOperation..ctor() +866 Microsoft.Reporting.WebForms.HttpHandler.GetH开发者_如何学Candler() +719 Microsoft.Reporting.WebForms.HttpHandler.ProcessRequest(HttpContext context) +15 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +638 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +177

can i get some help please

update : tested it on the production as http://productionserver/applicationname it is working fine (thats when i put the application as a virtual directory under the default site) but when i put the application as saperate site http://applicationname on the same server i get the error ?!!!

You may also encounter this issue if the path to the report includes an underscore. I haven't identified a fix other than to remove them, but that does work (for us at least).

EG: http://reportserverhost/Reports_Dev/SomeReport had to become http://reportserverhost/Reports Dev/SomeReport in order to work.

Makes no sense to me but that's our fix.

I was having this same issue. The report viewer would randomly pick when to show the report and the other times I would just get this error: "ASP.NET session has expired or could not be found".

After trying every possible solution on the web, I finally found that the issue was in the Process Model under the Advance Settings in the Application Pool.

The Maximum Worker Process was set to 2 and after changing the number to 1, I was no longer getting an error "ASP.NET session has expired or could not be found".

Hopefully, I can help another person saving some time.

Here is a screenshot of what you need to change in the settings.

Three things you can try from, the first two are from here.

1) Change the default InProc Session-State mode to StateServer mode as following:

<sessionState mode="StateServer" stateConnectionString="tcpip=localhost:42424" cookieless="false" timeout="20"/>

or

2) You may have an image in the Report. When you're taking the report to production, you might be forgeting to take the image that was embeded in the report as well.

or

3) Your IIS may be trying to spin up more processes or whatever - at any rate, set your maxworkingprocesses to 1 so it doesn't try to spin up new ones.