We have .net application installed on production server. It is using .net FrameWork 3.0 on windows server 2003 with RAM 4 GB. But there is a problem in application while running sometimes it throws system out of memory exception. I am very frustrating with this. Also I am unable to simulate the issue. I had checked all the possibilities which can cause the problem but didn’t get any thing which solve the issue

I checked on production server event log found the Out Of Memory Exception also INVALID VIEW STATE logs are there. Look at the following event log which may help to find solutions.

Exception information: 
    Exception type: HttpException 
    Exception message: Invalid viewstate. 
Request information: 
    Request path: /zContest/ScriptResource.axd 
    User: LisaA 
    Is authenticated: True 
    Authentication Type: Forms 

Thread information: 
    Thread ID: 10 
    Is impersonating: True 
    Stack trace:    at System.Web.UI.Page.DecryptStringWithIV(String s, IVType ivType)
   at System.Web.UI.Page.DecryptString(String s)
   at System.Web.Handlers.ScriptResourceHandler.DecryptParameter(NameValueCollection queryString)
   at System.Web.Handlers.ScriptResourceHandler.ProcessRequestInternal(HttpResponse response, NameValueCollection queryString, VirtualFileReader fileReader)
   at System.Web.Handlers.ScriptResourceHandler.ProcessRequest(HttpContext context)
   at System.Web.Handlers.ScriptResourceHandler.System.Web.IHttpHandler.ProcessRequest(HttpContext context)
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
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Event code: 3005 
Event message: An unhandled exception has occurred. 
Process information: 
    Process ID: 5388 
    Process name: w3wp.exe  
Exception information: 
    Exception type: OutOfMemoryException 
    Exception message: Exception of type 'System.OutOfMemoryException' was thrown. 
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Please help me out on this