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Viewstate in Session and timeout issues

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Roger asked on 30 Apr 2009, 10:08 PM

I'm using Q1 2009 Telerik controls and I've got a major issue with timeouts.

On my development box, my session or something seems to be timing out in 15 minutes, even though I've got the timeout set to 240 minutes, which is the value returned by session.timeout.

I was using using Return New SessionPageStatePersister(MyBase.Page) and a browser file to put the viewstate in Session and thinking that might be the issue, I switched to use Teleriks method as described in
http://www.telerik.com/support/kb/aspnet-ajax/general/saving-the-viewstate-of-radcontrols-server-side.aspx

Same issue, same results.

Multiple developers using Vista, all getting the same results, and our production box is Windows 2003, which is also timing out.

It's not always 15 mintues, it varies from just a few seconds to 15 minutes.

I enabled script debugging in my browser, and the error is a msajx.js.

I ran the application in debug mode, let it set and same restuls, I got the JS error before it hit my breakpoint in code.

Any suggestion in how to track this down even further to determine the root of this issue would be greatly appreciated.

Thanks in advance

Roger

4 Answers, 1 is accepted

answered on 01 May 2009, 04:39 PM

The error I'm getting is sys.WebForms.PageRequestManagerServerErrorException: Object reference not set to an instance of an object.

I've been digging and found

http://forums.asp.net/p/1069384/1555817.aspx and

http://weblogs.asp.net/leftslipper/archive/2007/02/26/sys-webforms-pagerequestmanagerparsererrorexception-what-it-is-and-how-to-avoid-it.aspx

With no luck as of yet.

Although it does seem to be consistently 15 minutes on my machine, before the error occurs, which is only seen if I Enable Script Debugging in my browser, otherwise, I just see the message in the bottom of the browser status bar, and the page discontinues to function.

Any suggestion in how to resolve this would be greatly appreciated.