Event ID 1309: The security validation for this page has timed out. Click Back in your Web browser, refresh the page, and try your operation again.

Dear SharePoint Experts,

I am getting below warnings on my front end servers, its very serious matter now, we getting calls from users. After this warning we start getting http throttling error(server busy now) with event ids - 8062,8032.

Please give me a way to find the issue with help of your experience.

Event code: 3005 
Event message: An unhandled exception has occurred. 
Event time: 4/16/2014 3:45:00 PM 
Event time (UTC): 4/16/2014 11:45:00 AM 
Event ID: 60d07d22873846e7890735a87108cc92 
Event sequence: 230417 
Event occurrence: 446 
Event detail code: 0 

Application information: 
    Application domain: /LM/W3SVC/313342888/ROOT-1-130421197155506937 
    Trust level: Full 
    Application Virtual Path: / 
    Application Path: E:\IISVirtualDirectories\80\ 
    Machine name: ServerName 

Process information: 
    Process ID: 8540 
    Process name: w3wp.exe 
    Account name: UserAccount 

Exception information: 
    Exception type: SPException 
    Exception message: The security validation for this page has timed out. Click Back in your Web browser, refresh the page, and try your operation again. 

Request information: 
    Request URL: http://portal/pages/default.aspx 
    Request path: /pages/default.aspx 
    User host address: Host IP 
    User: User ID 
    Is authenticated: True 
    Authentication Type: NTLM 
    Thread account name: App Pool Account 

Thread information: 
    Thread ID: 27 
    Thread account name: App Pool Account 
    Is impersonating: False 
    Stack trace:    at Microsoft.SharePoint.SPGlobal.HandleComException(COMException comEx)
   at Microsoft.SharePoint.Library.SPRequest.ValidateFormDigest(String bstrUrl, String bstrListName)
   at Microsoft.SharePoint.SPWeb.ValidateFormDigest()
   at Microsoft.SharePoint.WebPartPages.ContentEditorWebPart.OnLoad(EventArgs e)
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

Sumeet Singhal