I modified the code to log 1st then do calls so that it should log"
hh:mm:ss RefreshCache_M involed!
hh:mm:ss FillCache_M invoked!
and I waited.  This morning I see RefreshCache_M invoked at 17:50 CT and
FillCache_M invoked at 19:44.

However I'll watch it another day or so to see more of a pattern.

doug

Private Sub FillCache_M()

Dim xmlDoc_M As New System.Xml.XmlDocument    

Call logIt(enLogLevel.StartStopService, msLogFilePath, mcModule, "",
"FillCache_C invoked")

mxmlDepositRatesDoc_C.Load(xmlDOC.xml)

_cache.Insert("xmlDoc_C", xmlDoc_M, New CacheDependency(xmlDox.xml),
Cache.NoAbsoluteExpiration, Cache.NoSlidingExpiration,
CacheItemPriority.Default, New CacheItemRemovedCallback(AddressOf
RefreshCache_M))

End Sub

Private Sub RefreshCache_M(ByVal Key As String, ByVal Item As Object, ByVal
Reason As CacheItemRemovedReason)

Call logIt(enLogLevel.StartStopService, msLogFilePath, mcModule, "",
"RefreshCache_M invoked")

Call FillCache_M()

End Sub

Hello Doug,
Thanks for your reply,

In IIS 6.0, long time inactivity does not trigger the Application_Error
event.
I think the reason of restaring application is that it failed to execute
FillCache_M method. Thereby, Application_Error was called and then
Application_End was invoked.

Is there any exception in Application_Error event?
Have you logged Error message in Application Error?
If not, please paste the following code snippet in Application_Error event.
Therefore we could capture the detailed information about Error.

I apologize for asking for some much information. According to your
description, the issue doesn't occur each time after RefreshCache.(only 2-3
time each day).  It's not possible for use to reproduce the issue on our
side. Thus, we need enough information to analysis.

void Application_Error(object sender, EventArgs e)
   {
       Exception ex = Server.GetLastError();
       string sLogMsg = null;
       try
       {
           // You do not need to log the HttpUnhandledException that
           // ASP.NET wrapped the exception in.
           if ((ex as System.Web.HttpUnhandledException) != null)
               ex = ex.InnerException;

           // Format message for the main exception.
           sLogMsg = string.Format("Unhandled exception.  Type={0}
Msg={1}\nStackTrace=\n{2}",
               ex.GetType().FullName, ex.Message, ex.StackTrace);

           // Format the message for any inner exceptions.
           while ((ex = ex.InnerException) != null)
           {
               sLogMsg += string.Format("\n\nInner exception.  Type={0}
Msg={1}",
                   ex.GetType().FullName, ex.Message);
               System.Runtime.InteropServices.COMException ce = ex as
System.Runtime.InteropServices.COMException;
               if (ce != null)
                   sLogMsg += "\nCOM Exception errcode = " +
ce.ErrorCode.ToString();
           }
       }
       catch
       {
       }
       finally
       {
           // Log the event to the event log.
           if (!System.Diagnostics.EventLog.SourceExists(".NET Runtime"))
           {
               System.Diagnostics.EventLog.CreateEventSource(".NET
Runtime", "Application");
           }
           System.Diagnostics.EventLog log = new
System.Diagnostics.EventLog();
           log.Source = ".NET Runtime";
           log.WriteEntry(sLogMsg,
System.Diagnostics.EventLogEntryType.Error);
       }
}

Please try the above method and check the event log. Let me know if there
is updated information.I'm stading by.
Have a great day.

Best regards,
Wen Yuan
Microsoft Online Community Support
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