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Forums > General Discussion Forums > ArGoSoft Mail Server .NET Edition
Subject: Webmail timeout
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intouch

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08-04-2008 10:54 AM  

Using the new .Net webmail interface, I have a problem with the system timing out and then displaying the error message "System.NullReferenceException: Object reference not set to an instance of an object." along wth the source and stack trace as I have enabled this in the Config.Web file. The version of the Webmail interface is 1.0.5.3.

I have tried to extend the timeout in the application by adding a line to the Config.Web file in the webmail folder, as follows; This was based on research via Google that indicated this was the correct way to control details of the ASP.NET session timeout.

Unfortunately, this does not seem to work, and fails to extend the timout beyond around 10 minutes. The issue is mostly a problem when people are preparing emails to send, as if they take too long it times out and they lose all their work. The old MSPro version did not have a short timeout, and users have come to expect this in our service.

Can anyone shed some light on what options we have for extending the timeout, either in the application or generally within IIS itself? I am using Server 2008, but have the same issue on Server 2003.

 
SteveT
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ArGoNuke Admiral
ArGoNuke Admiral
08-05-2008 9:52 PM  
I think you are referring to Session State. By default is will time out after 20 minutes. In IIS6 (Windows 2003) you can change this value by going to your web site, right click and select Properties. Select the Home Directory Tab -> Configuration Button -> Options Tab. From there you can increase your session state time out.
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Steve Topilnycky
Top Cat Computing
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intouch

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ArGoNuke Recruit
08-05-2008 10:11 PM  
Hi Steve,

Thanks for that. The hint about where this should be controlled is what I needed. I am using 2008 Server, which has IIS7 installed, and the location of the setting is in Website/ASP.Net/Session State. There are a range of options regarding session state, and the default for this is 20 minutes.

It would be good for the webmail code to be more robust, to check on the validity of the session variables before they are used, so that this error is handled correctly. It seems that there are only a few places where this would need to be done, but I am not an ASP.Net programmer so would not know the best way to go about this. I hope this feedback is useful as positive criticism, not negative, and thanks again for the pointer on where I should be looking.

I have increased the setting to 60 minutes, and now I will have to wait at least 25 to verify that my change has worked.
SteveT
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ArGoNuke Admiral
08-05-2008 11:05 PM  
I will pass your comments on to the Developer, Archie.
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Steve Topilnycky
Top Cat Computing
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intouch

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ArGoNuke Recruit
ArGoNuke Recruit
08-06-2008 12:32 AM  
Unfortunately, it hasn't worked, the application still times out. I have tested with IIS 6 on 2003 server and IIS 7 on 2008 server, neither have worked so far. I will do some more research and testing over the next 24-48 hours and report back on what works if I can get it happening. My other option is to investigate the code and handle the session timeout manually, or to use options in ASP that will allow the session to be recreated. There seem to be many options!
SteveT
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ArGoNuke Admiral
08-06-2008 12:39 AM  
I have advised Archie and it is on his "To-Do" list. Did you restart IIS after making the change?
Top Cat Computing BOINC Team StatsRegards,
Steve Topilnycky
Top Cat Computing
http://www.topcatcomputing.com
intouch

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ArGoNuke Recruit
ArGoNuke Recruit
08-06-2008 1:36 AM  
Yes, restarted IIS. Did not restart the server, figured it would not be necessary.
SteveT
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ArGoNuke Admiral
08-06-2008 7:58 AM  
It shouldn't be necessary to restart the server, but I am unfamiluar with the Quirks of Win2008. I haven't tried it yet. But have been doing some reading on it.
Top Cat Computing BOINC Team StatsRegards,
Steve Topilnycky
Top Cat Computing
http://www.topcatcomputing.com
dr_fission

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ArGoNuke Recruit
10-02-2008 5:45 AM  
Go to the web.config file in the WebMail directory and locate the sessionState settings about half way down. The timeout default is set to 2 minutes in ver 1.0.5.5. Just change the timeout to whatever length in minutes that you want.
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