Problem to error 500

Question

User364663285 posted

Hi,

How to resolve?

Server Error

500 - Internal server error.
There is a problem with the resource you are looking for, and it cannot be displayed.

while here is part of my current Web.config

    <system.web>
      <customErrors mode="Off" />
      <compilation debug="true" targetFramework="4.5" />
      <httpRuntime targetFramework="4.5" />

Answer 1

User-369506445 posted

hi

First, you need to enable and see detailed errors of your web messages, because this is a general message without giving information on what's really happening for security reasons.

With the detailed error, you can locate the real issue here.

Also, if you can run the browser on the server, you get details on the error, because the server recognizes that you are local and shows it to you. Or if you can read the log of the server using the Event Viewer, you also see the details of your error.

On IIS 6

<configuration>
    <system.web>
        <customErrors mode="Off"/>
        <compilation debug="true"/>
    </system.web>
</configuration>

On IIS 7

<configuration>
    <system.webServer>
        <httpErrors errorMode="Detailed" />
        <asp scriptErrorSentToBrowser="true"/>
    </system.webServer>
    <system.web>
        <customErrors mode="Off"/>
        <compilation debug="true"/>
    </system.web>
</configuration>

Note: You can avoid the Debug=true. You only need to close the custom errors for a while and get the detailed error page.

Reference: Enabling Windows custom error messaging in Go Daddy's help articles.

Also, this can help: How to enable the detailed error messages (from IIS).

Answer 2

User364663285 posted

Can you please point out what problem I have, with the project?

Answer 3

User-369506445 posted

this is a general message without giving information on what's really happening for security reasons. you have to enable to see details errors 

in the last post, I described how do you do it

Answer 4

User-1320437544 posted

Remote login to the server (RDP) and use its browser to open the application's URL then you can view  what the reason is (from localhost which is basicaly the deployment server). I think it would be a good starting point.

Let us know if it helped.

Answer 5

User1724605321 posted

Hi wmec,

The 500 Internal Server Error is a very general HTTP status code. It means something has gone wrong on the website and webserver is unable to specify what exactly, thus failing in fulfilling the request made by the client. This is not related to client and the fault is in the webpage/website requested that resides on server.

Generally, it is logged into Windows Event Logs on the server. Thus, first thing while troubleshooting the error is to see Windows Event Logs on the server to find what went wrong.

Other useful thing to troubleshoot it would be to disable friendly HTTP error messages to see if the raw content can provide a direction to look more. Steps:

• Go to menu Tools/Internet Options in your IE.
• Click on the Advanced tab & then uncheck “Show friendly HTTP error messages” option and then click OK.
• Now, when on accessing the same web page, much more developer meaningful error message will be shown.

Reference : https://www.codeproject.com/articles/545054/http-500-internal-server-error 

Best Regards,

Nan Yu

Answer 6

User364663285 posted

Thanks to all.
Nan,
Sorry, where is “Show friendly HTTP error messages” option below?

https://1drv.ms/u/s!Ai8CrEskdewXmm87smbewZea5IGB

Answer 7

User409696431 posted

 "Show friendly HTTP error message" is under the Browsing section in Advanced. 

Answer 8

User364663285 posted

Sorry, did you see my screenshot in above? Could you please point out the option mentioned by you in the screenshot?

Answer 9

User-1320437544 posted

Error 500 is internal server error you will NOT be able to see it on client side. Thats logical for security reasons imagine is each server shows to everyone in Internet debugging or log info.

Did you tried what I mensioned earlier in my previous replay?

Best regards

Answer 10

User364663285 posted

Yes, within the server, I also cannot go to the web page (via IE) but I've deployed the project successfully.

Answer 11

User-1320437544 posted

Let me recap just to make sure I undertood the steps you did so far.

1. You've deployed the web application on the server and had set IIS.
2. You are getting HTTP response code 500 which is Internal Server Error.
3. You've logged on on the server via RDP or another remote access tool.
4. You've set debuge="true" in your web.config.
5. You've tried to open the web application in Internet Explorer ON THE SERVER.

My question here is what you mean by saying I cannot go to the web page via IE!? It must be there if deployed correctly within IIS. Whether or not correctly functional app you must receive at least HTTP status code if all 5 steps are done.

Please shed some light.

Thanks

Answer 12

User364663285 posted

I mean the web page (within the server) is also not being displayed.

Answer 13

User-1320437544 posted

Do you have other pages hosted on this server? Does they work properly?

What I am thinking is maybe you are having problems with IIS not with the application.

Answer 14

User364663285 posted

IIS was set up properly and I also deployed project without issue.

Answer 15

User364663285 posted

KathyW

 "Show friendly HTTP error message" is under the Browsing section in Advanced. 

Kathy,
Such option is always on but I still get the below error, in IE.
https://1drv.ms/u/s!Ai8CrEskdewXmnKX7D2ZPQlWXqH1

Answer 16

User409696431 posted

Your statement is a bit confusing.  You say "Such option is always on", but you want it turned off - unclick it.

The linked image in your message is has nothing to do with the friendly url errors option.

Answer 17

User364663285 posted

I un-click this option in IE (and then re-opened IE) but I still have got this error below

Server Error

500 - Internal server error.

There is a problem with the resource you are looking for, and it cannot be displayed.

 

 

Answer 18

User1120430333 posted

wmec

I un-click this option in IE (and then re-opened IE) but I still have got this error below

Server Error

500 - Internal server error.

There is a problem with the resource you are looking for, and it cannot be displayed.

 

Look, the program running on the Web server through an unhandled .NET exception. There is no try/catch in the code where the exception occurred to handle the exception. Since the exception was unhandled, the Web server swallowed the exception and then through the HTTP 500 error response code.

You are never going to address the issue until you discover what the .NET exception is about. Most would have some kind of global exception handling  logic that catches unhandled exceptions that shows the exception message, the inner.exception.message if there one and the stack trace.

I get HTTP 500 responses all the time when developing ASP.NET Web code, but I have global exception handling in the solution to catch and log the exception to a log file so that I can see what the exception is about as I use notepad to look at the content of the log file.  The below is the unhandled exception that was caught by the exception logging logic when all I got back visibly was an HTTP 500 error . With the log, I was able to track down what was wrong.

======================================================================================================

ERROR 2018-08-12 08:27:28,675 21299ms BaseController LogError - System.ArgumentException: The parameters dictionary contains a null entry for parameter 'id' of non-nullable type 'System.Int32' for method 'System.Web.Mvc.ActionResult Index(Int32)' in 'ProgMgmntVB.Controllers.TaskController'. An optional parameter must be a reference type, a nullable type, or be declared as an optional parameter.
Parameter name: parameters
at System.Web.Mvc.ActionDescriptor.ExtractParameterFromDictionary(ParameterInfo parameterInfo, IDictionary`2 parameters, MethodInfo methodInfo)
at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters)
at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters)
at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c.<BeginInvokeSynchronousActionMethod>b__9_0(IAsyncResult asyncResult, ActionInvocation innerInvokeState)
at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`2.CallEndDelegate(IAsyncResult asyncResult)
at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResultBase`1.End()
at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult)
at System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.<InvokeActionMethodFilterAsynchronouslyRecursive>b__11_0()
at System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.<>c__DisplayClass11_1.<InvokeActionMethodFilterAsynchronouslyRecursive>b__2()
at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass7_0.<BeginInvokeActionMethodWithFilters>b__1(IAsyncResult asyncResult)
at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult)
at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResultBase`1.End()
at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult)
at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass3_6.<BeginInvokeAction>b__3()
at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass3_1.<BeginInvokeAction>b__5(IAsyncResult asyncResult)
ERROR 2018-08-12 10:36:36,334 39834ms BaseController LogError - System.Web.HttpCompileException (0x80004005): C:\Projects\ProgMgmntVB\ProgMgmntVB\Views\Home\Index.vbhtml(25): error BC30201: Expression expected.
at System.Web.Compilation.AssemblyBuilder.Compile()
at System.Web.Compilation.BuildProvidersCompiler.PerformBuild()
at System.Web.Compilation.BuildManager.CompileWebFile(VirtualPath virtualPath)
at System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate)
at System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate)
at System.Web.Compilation.BuildManager.GetVirtualPathObjectFactory(VirtualPath virtualPath, HttpContext context, Boolean allowCrossApp, Boolean throwIfNotFound)
at System.Web.Compilation.BuildManager.GetCompiledType(VirtualPath virtualPath)
at System.Web.Compilation.BuildManager.GetCompiledType(String virtualPath)
at System.Web.Mvc.BuildManagerWrapper.System.Web.Mvc.IBuildManager.GetCompiledType(String virtualPath)
at System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext, TextWriter writer)
at System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context)
at System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult)
at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult)
at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult)
at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult)
at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass3_6.<BeginInvokeAction>b__3()

Answer 19

User364663285 posted

Where can I get root reason to this error?

Answer 20

User1120430333 posted

You are going to need to put some logic in your program that is a global exception handler that is going to catch the unhandled exception that was thrown and log the error to a log file. I don't knw what kind of Web program you are writing to catch the error and log it. It could be kind of what I am doing in an MVC program where the controller inherits the logic of a BaseContoller so that if any exception is thrown in the controller, the Basecontroller will catch it and log it. 

Imports System.Web.Mvc
Imports log4net

Namespace Controllers
    Public MustInherit Class BaseController
        Inherits Controller

        private ReadOnly _logger As ILog

        public sub New()
            _logger = LogManager.GetLogger(GetType(BaseController))
        End sub

        Protected Overrides Sub OnException(filterContext As ExceptionContext)
            MyBase.OnException(filterContext)

            dim appexception as AppException = New AppException(CStr(filterContext.Exception.ToString()), _logger) 

            Server.ClearError()

            RedirectToControllers("Home", "TheError")

        End Sub

        private sub RedirectToControllers(control As string, action As string)

            dim routeData = new RouteData()

            routeData.Values("controller") = control
            routeData.Values("action") = action

            Dim controller As IController = new HomeController(nothing) 
            controller.Execute(New RequestContext(new HttpContextWrapper(system.Web.HttpContext.Current), routeData))

        End sub
        
    End Class
End Namespace

==========================================================

Imports log4net

Public Class AppException
    Inherits Exception

    private ReadOnly _logger As ILog

    Public Sub New(ByVal logger As ILog)

        _logger = logger
        LogError("An unexpected error occurred.", _logger)

    End Sub

    public sub New (byval message as String, logger As ILog) 

        _logger = logger

        LogError(message, _logger)

    End sub

    Public Sub New( ByVal message As String, ByVal innerException As Exception, ByVal logger As ILog)

        _logger = logger
        LogError(message, _logger)

        If Not (innerException Is Nothing) Then
            LogError(innerException.Message.ToString, _logger)
        End If

    End Sub
      
    Public Shared Sub LogError(ByVal message As String, ByVal logger As ILog)
        logger.Error(message)
    End Sub

  End Class
===========================================================
Imports System.Web.Mvc
Imports ProgMgmntVB.Models

Namespace Controllers
    Public Class ProjectController
        Inherits BaseController

        private readonly _projectModel As IProjectModel 
        private readonly _modelHelper As IModelHelper 

        public sub New (projectModel As IProjectModel, modelHelper As IModelHelper)
            _projectModel = projectModel
            _modelHelper = modelHelper
        End sub

        ' GET: Project
        <Authorize>
        public Function Index() As ActionResult
            Return View(_projectModel.GetProjectsByUserId(User.Identity.Name))
        End Function

        <Authorize>
        public Function  Details(Optional id As Int32 = 0) As ActionResult
            return  IIf(id = 0, nothing, View(_projectModel.Edit(id)))
        End Function
       
        <Authorize>
        public Function  Edit(Optional id As Int32 = 0) As ActionResult 
            return  IIf(id = 0, nothing, View(_projectModel.Edit(id)))
        End Function

        <Authorize>
        public Function  Create() as ActionResult
            return View(_projectModel.Create())
        End Function
        
        <Authorize>
        <HttpPost>
        public  Function Create(project as ProjectViewModels.Project, submit As string ) As ActionResult

            if submit = "Cancel" Then
                return RedirectToAction("Index")
            End If

            Call ValidateddlProjectTypes()

            project.ProjectType = Request.Form("ddlProjectTypes")

            If ModelState.IsValid And _modelHelper.IsEndDateLessThanStartDate(project, "Project") Then
                ModelState.AddModelError(String.Empty, "End Date cannot be less than Start Date.")
            End If

            if Not ModelState.IsValid Then
                return View(_projectModel.PopulateSelectedList(project))
            End If

            _projectModel.Create(project, User.Identity.Name)
            return RedirectToAction("Index")

        End Function
     
        <Authorize>
        <HttpPost>
        public Function  Edit(project as ProjectViewModels.Project, submit As string ) As ActionResult

            if submit = "Cancel" Then
                return RedirectToAction("Index")
            End If

            If ModelState.IsValid And _modelHelper.IsEndDateLessThanStartDate(project, "Project") Then
                ModelState.AddModelError(String.Empty, "End Date cannot be less than Start Date.")
            End If

            if Not ModelState.IsValid Then
                return View(_projectModel.PopulateSelectedList(project))
            End If

            dim theproject = project

            theproject.ProjectType = Request.Form("ProjectType")

            _projectModel.Edit(theproject, User.Identity.Name)

            return RedirectToAction("Index")

        End Function

        public  Function Delete(Optional id As Int32 = 0) as ActionResult

            if id > 0 Then
               _projectModel.Delete(id)
            end If

            return RedirectToAction("Index")

        End Function
        
        public Function  Cancel() As ActionResult
            return RedirectToAction("Index", "Home")
        End Function
        
        public function UploadFile(id As Int32) As ActionResult
            return RedirectToAction("UploadFile", "Upload", new With { .id = id, .type = "PM" })
        End function
       
        private sub ValidateddlProjectTypes()

            if Request.Form("ddlProjectTypes") = String.Empty Then
                exit sub
            End If

            for each  key1 in ModelState.Keys.ToList().Where(Function(key) ModelState.ContainsKey(key))

                if key1 <> "ProjectType" Then
                    continue for
                End If

                ModelState(key1).Errors.Clear()
            next

        End sub
    End Class
End Namespace

Answer 21

User364663285 posted

I did not have the current issue on the same server, with the same ASP project. But this issue arose after I've re-installed the server.

Answer 22

User409696431 posted

"I did not have the current issue on the same server, with the same ASP project. But this issue arose after I've re-installed the server."

Then something was not set up properly when you reinstalled the server.

We can't tell you what that is.

You could try capturing errors as DA924 suggests, or post on an IIS forum to see if they can point you to likely culprits.

Answer 23

User1120430333 posted

I did not have the current issue on the same server, with the same ASP project. But this issue arose after I've re-installed the server.

Now you do have an issue, and you don't know what the error is about. Best practice is that you always implement global exception handling in a Web solution and log the error. 

You log the ex.message, the ex.inner.exception.messsage.  if there it could null and you need to check,  and log the stack trace.  

https://stackify.com/csharp-catch-all-exceptions/?utm_referrer=https%3A%2F%2Fwww.google.com%2F

You can use Log4NET to log the error

And you don't leave home without the GEH implemented into the solution.

Answer 24

User364663285 posted

Hi all,

Is there any problem below?

https://1drv.ms/u/s!Ai8CrEskdewXmnQ8H0o3gZiP3ItN

Answer 25

User1120430333 posted

Hi all,

Is there any problem below?

https://1drv.ms/u/s!Ai8CrEskdewXmnQ8H0o3gZiP3ItN

All you are doing is blindly stabbing in the dark. The only possible sliver bullet and the pulling of the rabbit out of the hat is global exception handling.  How many days have you been looking for a solution that no one can help you with but you in this situation?

Answer 26

User753101303 posted

Hi,

http 500 means you have a server side error. By default you should find error details in the Windows event log. You could also check the IIS log to see which 500.x error you have (using the "substatus" code). 500.19 would point to a config problem for example.

It will allow to start from the actual problem rather than trying to guess.