Errors while stress testing a load balanced application

[Ravi Chand via .NET 247]

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Hi All,

One of our ASP.Net application was stress tested recently andunfortunately it is throwing up intermittent errors. Theapplication has been setup in a load balancing environment. Theaspx pages thorwing the errors work normally under stress freeconditions.

The 2 distinct errors being thrown are:

1) Specified Cast is not valid
System.InvalidCastException: Specified Cast is not valid

Stack Trace:
[InvalidCastException:Specified Cast is not valid.]
System.Web.UI.Page.LoadPageViewState() +28
System.Web.UI.Page.ProcessRequestMain() +439

2) Object reference not set to an instance of an object
System.NullReferenceException: Object reference not set to aninstance of an object

Stack Trace:
[NullReferenceException: Object reference not set to an instanceof an object.]
MyApplication.View.ShowDetails.Page_Load(obj sender, EventArgs e)+1329
System.Web.UI.Control.OnLoad(EventArgs e) +67
System.Web.UI.Control.LoadRecursive +29
System.Web.UI.Page.ProcessRequestMain +742

Any clues?? Thanks in advance guys.