Question

I created

protected void Application_Error(object sender, EventArgs e)
{
   if (Context.Handler is IRequiresSessionState || Context.Handler is IReadOnlySessionState)
   {
      try
      {
         var httpContext = HttpContext.Current;
         Exception exception = httpContext.Server.GetLastError();

         if (exception is HttpRequestValidationException)
         {
            httpContext.Response.Clear();
            var logLoggerService = new LogLoggerService();
            logLoggerService.Error("ValidationException", exception);
            WriteErrorResponse(exception.Message);
         }
         else
         {
            httpContext.Response.Clear();
            var logLoggerService = new LogLoggerService();

            logLoggerService.Error(exception);
            WriteErrorResponse(exception.Message);
         }
     }
     catch
     {
        var httpContext = HttpContext.Current;
        httpContext.Response.Clear();
     }
  }
}

I found that when error occurred on server, this function is not call. But when I am in debug mode, the Application_Error is called.

Why this does not work on server? Maybe problem with IIS or with .NET 4.0 on server?

On server I have:

Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 15-8-2011 8:25:26
Event time (UTC): 15-8-2011 6:25:26
Event ID: ae3cad590adc43c3803410023cccb6b0
Event sequence: 4
Event occurrence: 1
Event detail code: 0

Application information:
Application domain: /LM/W3SVC/11/ROOT-1-129578631124796958
Trust level: Full
Application Virtual Path: /
Application Path: C:\inetpub\wwwroot\TestnaAplikacijaZaLog\
Machine name: SRJ1-SRV-01

Process information:
Process ID: 6644
Process name: w3wp.exe
Account name: IIS APPPOOL\TestnaAplikacijaZaLog

Exception information:
Exception type: HttpException
Exception message: Response is not available in this context.
at System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app)
at System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers)
at System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context)
at System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context)
at System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext)

Response is not available in this context.
at System.Web.HttpContext.get_Response()
at LogiranjeGresaka.MvcApplication.Application_Start() in c:\users\esmira\documents\visual studio 2010\Projects\LogiranjeGresaka\LogiranjeGresaka\Global.asax.cs:line 46

Request information:
Request URL: http://192.168.0.100:2227/Home/Index
Request path: /Home/Index
User host address: 192.168.0.103
User:
Is authenticated: False
Authentication Type:
Thread account name: IIS APPPOOL\TestnaAplikacijaZaLog

Thread information:
Thread ID: 7
Thread account name: IIS APPPOOL\TestnaAplikacijaZaLog
Is impersonating: False
Stack trace: at System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app)
at System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers)
at System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context)
at System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context)
at System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext)

Custom event details:

Answer 1

I solve problem with adding

<system.web>
  <customErrors mode="Off" />
</system.web>