Hi,

Today all of sudden all of my user kicked out from server. After looking at Event Manager i find this line is keep appearing every now and then.
Is it possible if anyone can tell me what is the meaning?

Event Type:    Warning
Event Source:    ASP.NET 2.0.50727.0
Event Category:    Web Event
Event ID:    1309
Date:        4/30/2008
Time:        10:48:42 AM
User:        N/A
Computer:    SERVER01
Description:
Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 4/30/2008 10:48:42 AM
Event time (UTC): 4/30/2008 2:48:42 PM
Event ID: af624673c5e04634aae9078a63fa9eda
Event sequence: 38059
Event occurrence: 2660
Event detail code: 0
 
Application information:
    Application domain: /LM/W3SVC/338634202/Root-1-128539375381086250
    Trust level: Full
    Application Virtual Path: /
    Application Path: D:\WEBSERVER01\
    Machine name: SERVER01
 
Process information:
    Process ID: 2748
    Process name: w3wp.exe
    Account name: NT AUTHORITY\NETWORK SERVICE
 
Exception information:
    Exception type: NullReferenceException
    Exception message: Object reference not set to an instance of an object.
 
Request information:
    Request URL: 
    Request path: 
    User host address: 
    User: 
    Is authenticated: False
    Authentication Type: 
    Thread account name: NT AUTHORITY\NETWORK SERVICE
 
Thread information:
    Thread ID: 11
    Thread account name: NT AUTHORITY\NETWORK SERVICE
    Is impersonating: False
    Stack trace:    at WEBSERVER01.com.Global.Session_End(Object sender, EventArgs e)
 
Custom event details:

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

 

You have a null reference exception.  Can't really tell much more without the offending code.

Jeff

Maybe this will help

http://www.eggheadcafe.com/articles/20060305.asp

 Or, if you do not feel like coding (which is hard to imagine)  ...perhaps you can try method 2 here http://support.microsoft.com/?id=911816 

I am trying to check at my development computer. But i didn't get any error :(.
My IIS never die but today seems restarted, so not sure what happen. I don't have much of code in My Global file. But i will try to catch all codes and see if i am still getting error.

 

Restarting of IIS sounds right.

It all kinda smells like permissions issue (90% of my problems in .NET were IIS permissions issues ).

I would compare application directory security for that application (or just the page where it blows up) on both IIS servers and see if they differ (Anonymous access is usually enabled and Windows authentication  disabled).

I'd try and implement the MS 'fix' and see if you can pinpoint the error.

If you do a lot of developing it will save you a ton of time in future.

Are you spawning any threads to do background work?

Are you using any timers?

 Thank you all for helping me to resolve this problem.

1- I don't have any thread in my web application so it shouldn't be a thread problem.
2- I did check and confirm that it is windows authentication (application is running fine, yesterday was the first time in last 2 years i got customer service feed back that every one was kicked out, Event Manager didn't show any log of service restart).
3- Would you mind to share which MS 'fix' you are referring to?

Here's the link :http://support.microsoft.com/?id=911816 

I tested it today and it works fine.

It logs unhandled erros in Application Log with stack trace (and exact location where error occured).

So it's not exactly a fix .... just something that may help you figure out where things are going wrong.