Session exception terminates application pool RSS

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  tobias

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  Session exception terminates application pool

  Jan 09, 2013 06:00 PM|LINK

  We are having occuring application pool crashes with folowing exception.

  Application: w3wp.exe

  Framework Version: v4.0.30319

  Description: The process was terminated due to an unhandled exception. Exception Info: System.NullReferenceException Stack:    at System.Collections.Specialized.NameObjectCollectionBase.BaseGet(Int32)    at System.Web.SessionState.SessionStateItemCollection.get_Item(Int32)    at System.Web.SessionState.HttpSessionStateContainer.get_Item(Int32)    at System.Web.Util.AspCompatApplicationStep.AnyStaObjectsInSessionState(System.Web.SessionState.HttpSessionState)    at System.Web.HttpApplicationFactory.FireSessionOnEnd(System.Web.SessionState.HttpSessionState, System.Object, System.EventArgs)    at System.Web.SessionState.SessionOnEndTargetWorkItem.RaiseOnEndCallback()    at System.Web.Util.WorkItem.CallCallbackWithAssert(System.Web.Util.WorkItemCallback)    at System.Web.Util.WorkItem.OnQueueUserWorkItemCompletion(System.Object)    at System.Threading.QueueUserWorkItemCallback.WaitCallback_Context(System.Object)    at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)    at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)    at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()    at System.Threading.ThreadPoolWorkQueue.Dispatch()    at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()

  I have read the KB http://support.microsoft.com/kb/827164 that it can occur when you are storing STA objects in the session, but I don´t think we do. How can we solve this issue? Just setting apartmentThreading to true doesn´t feel right.

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  secher

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  Re: Session exception terminates application pool

  Jan 11, 2013 06:44 AM|LINK

  Why do you to store this objects in Session and not in Cache. I'm not sure, but may be for Session storage it must be serializable.

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  Angie xu - M...

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  Re: Session exception terminates application pool

  Jan 14, 2013 06:00 AM|LINK

  Hi tobias

  You could understand and diagnose an application pool crash first, and then learn how to best deal with it below,

  application pool crash

  application domains, application pools and unhandled exceptions

  hope it helps you,

  Kind regards

  Please mark the replies as answers if they help or unmark if not.
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  tobias

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  Re: Session exception terminates application pool

  Jan 16, 2013 07:06 AM|LINK

  I have tested setting apartmentThreading to true but that didn't help. I havn't been able to get a crash dump yet. For some reason my initial try didn't caught the exception.

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  sameer_khanj...

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  Re: Session exception terminates application pool

  Jan 16, 2013 07:33 AM|LINK

  Please check below thread :- 

  http://stackoverflow.com/questions/4742122/asp-net-application-pool-shutdown-problem

  
  sameer.khanjit@gmail.com 
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  tobias

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  Re: Session exception terminates application pool

  Jan 16, 2013 07:55 AM|LINK

  I have enabled legacyUnhandledExceptionPolicy so the application pool won't crash but that doesn't solve the underlying problem.

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  sameer_khanj...

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  Re: Session exception terminates application pool

  Jan 16, 2013 08:02 AM|LINK

  Please give me answers for following questions :- 

  1) Are you using webfarm ?

  2)Are you using App fabric ?

  3) what are you storing in session ? any complex object ?

  4) Are you storing viewstate in session ?

  5) session stored in inmemory or using state server\SQl server ?

  
  sameer.khanjit@gmail.com 
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  sameer_khanj...

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  Re: Session exception terminates application pool

  Jan 16, 2013 08:02 AM|LINK

  Please give me answers for following questions :- 

  1) Are you using webfarm ?

  2)Are you using App fabric ?

  3) what are you storing in session ? any complex object ?

  4) Are you storing viewstate in session ?

  5) session stored in inmemory or using state server\SQl server ?

  
  sameer.khanjit@gmail.com 
  View Blog
  Click "Mark as Answer" on the post that helped you.
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  tobias

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  Re: Session exception terminates application pool

  Jan 16, 2013 08:42 AM|LINK

  1) We are using a load balancer but each request for an application is always served by same webserver.

  2) No.

  3) Mostly primitives but som more complex objects.

  4) No.

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  sameer_khanj...

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  Re: Session exception terminates application pool

  Jan 16, 2013 08:45 AM|LINK

  Please provide machine key in each webconfig.

  Please make sure machinekey should be same on all server. will solve your error.

  http://msdn.microsoft.com/en-us/library/ff649308.aspx

  Also check use full post :

  http://www.c-sharpcorner.com/UploadFile/gopenath/Page107182007032219AM/Page1.aspx

  
  sameer.khanjit@gmail.com 
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  • Edited by sameer_khanjit on Jan 16, 2013 08:46 AM
  • Edited by Angie xu - MSFT on Jan 18, 2013 12:37 AM
  • Edited by tobias on Jan 21, 2013 06:19 AM