Site got hammered over the weekend, users were getting this error
System.Collections.Generic.List`1+Enumerator.MoveNext():35
..(String requestDomain):158
MonoSoftware.Web.WAO.ViewState.Configuration.ViewStateConfiguration.GetPageStatePersister(Page page):47
Medportal.Sitefinity.Controls.Code.CustomViewStatePage.get_PageStatePersister() in C:\Medportal\Master\Medportal.Sitefinity.Controls\Code\CustomViewStatePage.cs:24
System.Web.UI.Page.RegisterRequiresControlState(Control control):105
Telerik.Web.UI.RadListView.OnInit(EventArgs e):21
System.Web.UI.Control.InitRecursive(Control namingContainer):255
System.Web.UI.Control.InitRecursive(Control namingContainer):143
System.Web.UI.Control.InitRecursive(Control namingContainer):143
System.Web.UI.Control.AddedControl(Control control, Int32 index):194
System.Web.UI.Control.EnsureChildControls():70
System.Web.UI.Control.PreRenderRecursiveInternal():47
System.Web.UI.Control.PreRenderRecursiveInternal():142
System.Web.UI.Control.PreRenderRecursiveInternal():142
System.Web.UI.Control.PreRenderRecursiveInternal():142
System.Web.UI.Control.PreRenderRecursiveInternal():142
System.Web.UI.Control.PreRenderRecursiveInternal():142
System.Web.UI.Control.PreRenderRecursiveInternal():142
System.Web.UI.Control.PreRenderRecursiveInternal():142
System.Web.UI.Control.PreRenderRecursiveInternal():142
System.Web.UI.Control.PreRenderRecursiveInternal():142
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint):1747
This is the class
public class CustomViewStatePage : System.Web.UI.Page
{
private System.Web.UI.PageStatePersister _pageStatePersister = null;
protected override System.Web.UI.PageStatePersister PageStatePersister
{
get
{
if (_pageStatePersister == null)
_pageStatePersister = ViewStateConfiguration.GetPageStatePersister(this.Page);
return _pageStatePersister;
}
}
protected override object LoadPageStateFromPersistenceMedium()
{
try
{
return base.LoadPageStateFromPersistenceMedium();
}
catch (Exception ex)
{
//Handle the missing viewstate by returning the empty state pair
System.Web.UI.PageStatePersister pageStatePersister = new System.Web.UI.HiddenFieldPageStatePersister(this.Page);
Debug.WriteLine(ex);
return new System.Web.UI.Pair(pageStatePersister.ControlState, pageStatePersister.ViewState);
}
}
}
We are using the DB persisted config... any idea what the problem might have been? Was the DB down or something maybe? ...can the error be elegantly handled somehow?