Server cannot set status after HTTP headers have been sent.

Question

This is coming in Live website only.When this issue comes user gets a blank page. to solve this issue currently i am recycling app pool manually. So is there any way to auto recycle a application pool in asp .net mvc. beacuse this issue comes in every 1 or 2 hours in a day. Following is the details of issue that i find from log.. Exception information: Exception type: HttpException Exception message: Server cannot set status after HTTP headers have been sent. at System.Web.HttpResponse.set_StatusCode(Int32 value) at System.Web.HttpResponseWrapper.set_StatusCode(Int32 value) at System.Web.Mvc.HandleErrorAttribute.OnException(ExceptionContext filterContext) at System.Web.Mvc.ControllerActionInvoker.InvokeExceptionFilters(ControllerContext controllerContext IList`1 filters Exception exception) at System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext String actionName) at System.Web.Mvc.Controller. c__DisplayClass1d. b__19() at System.Web.Mvc.Async.AsyncResultWrapper. c__DisplayClass1. b__0() at System.Web.Mvc.Async.AsyncResultWrapper. c__DisplayClass8`1. b__7(IAsyncResult _) at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.End() at System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) at System.Web.Mvc.Async.AsyncResultWrapper. c__DisplayClass4. b__3(IAsyncResult ar) at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.End() at System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) at System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) at System.Web.Mvc.MvcHandler. c__DisplayClass8. b__3(IAsyncResult asyncResult) at System.Web.Mvc.Async.AsyncResultWrapper. c__DisplayClass4. b__3(IAsyncResult ar) at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.End() at System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) at System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) at Orchard.Mvc.Routes.ShellRoute.HttpAsyncHandler.EndProcessRequest(IAsyncResult result) at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step Boolean& completedSynchronously)

Nitin Sontakke · Answer

Unfortunately after developing classic asp and asp.net applications i just didn't get the chance to move on to mvc. So while i am generally familiar with the concept I am largely oblivious to the details of it. In any case please read and see any of the following is helpful. http://stackoverflow.com/questions/21014614/server-cannot-set-status-after-http-headers-have-been-sent http://stackoverflow.com/questions/24601078/mvc4-server-cannot-set-status-after-http-headers-have-been-sent http://stackoverflow.com/questions/2383169/server-cannot-set-status-after-http-headers-have-been-sent-iis7-5 I suggest you search for problem term (such as 'Response') in entire solution.

Prithvi singh · Answer

Thanks Nitin for your efforts but i am not using response.redirect or server.transfer  any where in my code.And i have already went through all of the url mensioned by you but none of them are useful in my case. i have hoted this website in my organization's local server also where i am not getting any issue .The issue is coming in my live website only. Is there any way to auto healing an iis hosted website.

Nitin Sontakke · Answer

I believe that you are taking a step in wrong direction. Instead of treating the disease what you are doing is just suppressing the symptoms. See if you are doing response.redirect or server.transfer AFTER writing to the response object. This error typically generated under those circumstances.