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• 08-11-2007, 4:42 PM

  jijo_robert Joined on 01-29-2004, 8:37 AM Posts 14

  session variable Issue Reply Contact I am using Session variable to store an id, that is being used in all web pages in the site. In some pages the session varaible is null. more annoying part is this is in consistent with the pages that throws this error. can some one help me figure out what is going on?  BTW I am using IIS 6.0 .NET 2.0. I have created a website and app pool for running this web application. I tried making it as virtual directory under the default website still same error.   Thanks jijo

• 08-11-2007, 9:07 PM

  In reply to

  mvolo Joined on 09-17-2003, 1:48 PM Philadelphia, PA Posts 584

  Re: session variable Issue Reply Contact jijo, Are you saying that certain pages always have the variable as null? Or, does it happen sometimes only, on different pages? You may lose your sessions if your application / application pool restart (if you are using the default inproc mode), the session times out (Default: 20 minutes), or if somehow the browser loses its cookies (or your code clears them). If you are running on a load-balanced web farm, you may observe lost sessions if you are using inproc mode. Thanks, Mike Volodarsky Program Manager IIS Core Server Visit mvolo.com for more inside information on IIS7, IIS and ASP.NET This posting is provided "AS IS" with no warranties, and confers no rights.

• 08-11-2007, 9:08 PM

  In reply to

  steve schofield Joined on 06-10-2002, 8:54 PM MI Posts 3,890

  Re: session variable Issue Reply Contact A few things come to mind. 1) make sure the application pool isn't recycling. By default .NET uses inproc session. When the app pool recycles, your session variables are lost. 2) You can turn off the setting that shutdown your application pool after 20 minutes.  3) .NET 2.0 has a 'feature' so to speak where you change something in your folder causes an app domain recycle.  Google .NET 2.0 and App Domain Recycles.  What do you see in the event log.  i would run the webpages locally and see if the w3wp process recycles or changes Process ID. Steve Schofield Windows Server MVP - IIS http://weblogs.asp.net/steveschofield http://www.IISLogs.com Log archival solution Install, Configure, Forget

• 08-12-2007, 4:31 PM

  In reply to

  jijo_robert Joined on 01-29-2004, 8:37 AM Posts 14

  Re: session variable Issue Reply Contact I am sure it is not the time out value issue. I have seven pages, and navigating from one page to another. User selects a value in page 1 and i need to carry over that value in all pages.  I am reading that value in all pages, and some pages reads correctly some do not. The pages that throw error are inconsistent.   There is not load balancer, IIS is running in local machine. Any help or suggestion will be greatly appreciated. thanks,

• 08-12-2007, 4:31 PM

  In reply to

  jijo_robert Joined on 01-29-2004, 8:37 AM Posts 14

  Re: session variable Issue Reply Contact I am sure it is not the time out value issue. I have seven pages, and navigating from one page to another. User selects a value in page 1 and i need to carry over that value in all pages.  I am reading that value in all pages, and some pages reads correctly some do not. The pages that throw error are inconsistent.   There is no load balancer, IIS is running in local machine. Any help or suggestion will be greatly appreciated. thanks,

• 08-12-2007, 4:34 PM

  In reply to

  jijo_robert Joined on 01-29-2004, 8:37 AM Posts 14	Re: session variable Issue Reply Contact Can you please expand this answer> 1) make sure the application pool isn't recycling. By default .NET uses inproc session. When the app pool recycles, your session variables are lost. I am not sure how to check the app pool recycle issue.

• 08-12-2007, 4:50 PM

  In reply to

  jijo_robert Joined on 01-29-2004, 8:37 AM Posts 14

  Re: session variable Issue Reply Contact Here is what I see in the output window   'w3wp.exe' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\insightvisionmanager\bbb8a587\507407ed\App_Web_wpxt15ty.dll', Symbols loaded. 'w3wp.exe' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\insightvisionmanager\bbb8a587\507407ed\App_Web_lkae9ijf.dll', Symbols loaded. The thread '<No Name>' (0xf2c) has exited with code 0 (0x0). 'w3wp.exe' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\insightvisionmanager\bbb8a587\507407ed\App_Web_xkavx4yo.dll', Symbols loaded. A first chance exception of type 'System.IO.FileNotFoundException' occurred in mscorlib.dll 'w3wp.exe' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\insightvisionmanager\bbb8a587\507407ed\App_Web_xkavx4yo.dll', Symbols loaded. A first chance exception of type 'System.NullReferenceException' occurred in App_Web_xkavx4yo.dll

• 08-12-2007, 4:50 PM

  In reply to

  jijo_robert Joined on 01-29-2004, 8:37 AM Posts 14

  Re: session variable Issue Reply Contact Event log Event code: 3005 Event message: An unhandled exception has occurred. Event time: 8/12/2007 4:47:58 PM Event time (UTC): 8/12/2007 8:47:58 PM Event ID: f5515dc31c6e49c889a7f12c8e80f2b6 Event sequence: 8 Event occurrence: 1 Event detail code: 0   Application information: Application domain: /LM/W3SVC/1/Root/InsightVisionManager-3-128314252164481835 Trust level: Full Application Virtual Path: /InsightVisionManager Application Path: C:\Projects\InsightVision\InsightVisionManager\ Machine name: VMLOCAL   Process information: Process ID: 2988 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: http://localhost/InsightVisionManager/Admin/Status.aspx?check=1&showlog=0 Request path: /InsightVisionManager/Admin/Status.aspx User host address: 127.0.0.1 User: VMLOCAL\Administrator Is authenticated: True Authentication Type: Negotiate Thread account name: NT AUTHORITY\NETWORK SERVICE   Thread information: Thread ID: 5 Thread account name: NT AUTHORITY\NETWORK SERVICE Is impersonating: False Stack trace: at Admin_Status.Page_Load(Object sender, EventArgs e) in c:\Projects\InsightVision\InsightVisionManager\Admin\Status.aspx.cs:line 21 at System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) at System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) at System.Web.UI.Control.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)     Custom event details: For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

• 08-12-2007, 8:51 PM

  In reply to

  mvolo Joined on 09-17-2003, 1:48 PM Philadelphia, PA Posts 584

  Re: session variable Issue Reply Contact You are getting an exception in Admin_Status.Page_Load(Object sender, EventArgs e) in c:\Projects\InsightVision\InsightVisionManager\Admin\Status.aspx.cs:line 21. Is this exception you attempting to access HttpContext.Session? If so, this is not a recycling issue.  The recycling issues cause session variables to get lost, but the Session itself is available.  If your Session object is null, its a whole other category of issues. So, which one is it: NullRef accessing .Session or NullRef accessing a specific session variable? Thanks, Mike Volodarsky Program Manager IIS Core Server Visit mvolo.com for more inside information on IIS7, IIS and ASP.NET This posting is provided "AS IS" with no warranties, and confers no rights.

• 08-14-2007, 8:16 PM

  In reply to

  jijo_robert Joined on 01-29-2004, 8:37 AM Posts 14	Re: session variable Issue Reply Contact I am able to get session.sessionid in all pages without any error. but cannot access Session["site"], which is set in welcome page.   Thanks,

• 08-15-2007, 8:21 AM

  In reply to

  tomkmvp Joined on 03-20-2003, 10:27 AM Central NJ Posts 6,186	Re: session variable Issue Reply Contact Can you show some code?  Have you followed up in http://forums.asp.net/ as well?  This is really more of an ASP.NET issue ... Tom Kaminski IIS MVP http://mvp.support.microsoft.com/ http://blogs.iis.net/tomkmvp/ http://www.linkedin.com/pub/8/690/408 http://www.bluesrepublic.org/

• 11-19-2008, 8:44 PM

  In reply to

  tezr Joined on 11-20-2008, 1:35 AM Posts 1

  Re: session variable Issue Reply Contact Steve,   just wanted to pass on thanks for your post that solved my problem. I have a screen that allows our users to manage files in their "current" pool.  Everything was ok until we provided a "Remove" option that actually deleted some sub-folders. Whenever this option was used, all our session variables were lost and they had to log in from scratch.  All I could see was the thread exiting with code 0. Looks like the 'feature' in point 3) was kicking in and clobbering us. Thanks again, Terry

• 11-21-2008, 11:36 PM

  In reply to

  steve schofield Joined on 06-10-2002, 8:54 PM MI Posts 3,890	Re: session variable Issue Reply Contact Wow! cool glad I was able to provide some direction.  Steve Schofield Windows Server MVP - IIS http://weblogs.asp.net/steveschofield http://www.IISLogs.com Log archival solution Install, Configure, Forget