Uncaught exception from the OnConnectionAsync method of an IConnectionAdapter

Fredy Wenger 201 Reputation points
2020-11-26T16:44:30.877+00:00

---- Update 27.11.2020 --------------
As I was not able to post the update as response to the response below (error message "1000 characters exceeded") , I had to update my original post.

****Serious general question:
-> Can it really be, that this forum does not allow more then 1'000 characters?!?):

  • If yes, this forum is not usable!!****

My reply -----------------------------------------------------------------
First, thanks for your reply

I have nothing special in my program.cs (code see below):

  • Read.ini file
  • Set some public variables
  • Load some images in Base64String's

I further have no specific code to the cert in the app (the cert is applied in appsetings.json (see my first posting)

But maybe I have solved the problem "implicitly" (to early to be sure):

  • For other reasons, I have added a redirect from http to https** a few days ago in startup.cs:**
  • Since then, it seems, I had no more crashes in the console (but as I worte above, its to early to be sure, that this redirect has solved the issue).

I cannot control, what kind of users/(hacker-)tools access the app over the internet.
So... from my point of view (not to comprehend / provoke by use the "legal" app over standard browser over https) this may be a plausible reason.

Can it be from your point of view, that access over http have caused the issue?

Added code in startup.cs

         if (env.IsDevelopment())  
               {  
                 app.UseDeveloperExceptionPage();  
               }  
               else  
               {  
                 app.UseExceptionHandler("/Home/Error");  
                 app.UseHsts();  
                 app.UseRewriter(new RewriteOptions().AddRedirectToHttps(StatusCodes.Status301MovedPermanently, 443));  
               }

Code in program.cs:

         public class Program  
          {  
            public static void Main(string[] args)  
            {  
              GV.bFehler_Ini = false;  
              try  
              {  
                var iniconfig = new ConfigurationBuilder()  
                .SetBasePath(Directory.GetCurrentDirectory())  
                .AddIniFile("matrixGuide.ini", optional: false, reloadOnChange: true)  
                .Build();  
                string cURL = iniconfig.GetValue<string>("Startup:URL");  
                string PfadDokumente = iniconfig.GetValue<string>("Parameter:PfadDokumente");  
                string PfadPortalDokumente = iniconfig.GetValue<string>("Parameter:PfadPortalDokumente");  
                string PfadTemp = iniconfig.GetValue<string>("Parameter:PfadTemp");  
                string PfadFotoVorlagen = iniconfig.GetValue<string>("Parameter:PfadFotoVorlagen");  
                string Umgebung = iniconfig.GetValue<string>("Parameter:Umgebung");  
                // SMTP-Parameter  
                string SMTPServer = iniconfig.GetValue<string>("Parameter:SMTPServer"); // zrhms100  
                int SMTPPort = iniconfig.GetValue<int>("Parameter:SMTPPort"); // 25  
                string SMTPAbsender = iniconfig.GetValue<string>("Parameter:SMTPAbsender"); // Portal@MatrixGuide.ch  
                string SMTPKennung = iniconfig.GetValue<string>("Parameter:SMTPKennung"); // leer -> noch nicht genutzt  
                string SMTPPW = iniconfig.GetValue<string>("Parameter:SMTPPW");   
                GV.cURL = cURL;  
                GV.PfadDokumente = PfadDokumente;  
                GV.PfadPortalDokumente = PfadPortalDokumente;  
                GV.PfadFotoVorlagen = PfadFotoVorlagen;  
                GV.PfadTemp = PfadTemp;  
                GV.Umgebung = Umgebung;  
                GV.SMTPServer = SMTPServer;  
                GV.SMTPPort = SMTPPort;  
                GV.SMTPAbsender = SMTPAbsender;  
                GV.SMTPKennung = SMTPKennung;  
                GV.SMTPPW = SMTPPW;  
                string FileMann = GV.PfadFotoVorlagen + "Symbol_Mann.jpg";  
                Image ImageMann = Image.FromFile(FileMann);  
                string Base64StringMann = ZF.BitmapToBase64(ImageMann);  
                GV.GrafikSymbolMann = Base64StringMann;  
                //  
                string FileFrau = GV.PfadFotoVorlagen + "Symbol_Frau.jpg";  
                Image ImageFrau = Image.FromFile(FileFrau);  
                string Base64StringFrau = ZF.BitmapToBase64(ImageFrau);  
                GV.GrafikSymbolFrau = Base64StringFrau;  
                string File_Vorlage_Beauty_Grid = GV.PfadFotoVorlagen + "Vorlage_Beauty_Grid.jpg";  
                Image ImageVorlage_Beauty_Grid = Image.FromFile(File_Vorlage_Beauty_Grid);  
                string Base64StringVorlage_Beauty_Grid = ZF.BitmapToBase64(ImageVorlage_Beauty_Grid);  
                GV.Vorlage_Beauty_Grid = Base64StringVorlage_Beauty_Grid;  
                //  
                string File_Vorlage_Beauty_WirUeberUns = GV.PfadFotoVorlagen + "Vorlage_Beauty_WirUeberUns.jpg";  
                Image ImageVorlage_Beauty_WirUeberUns = Image.FromFile(File_Vorlage_Beauty_WirUeberUns);  
                string Base64StringVorlage_Beauty_WirUeberUns = ZF.BitmapToBase64(ImageVorlage_Beauty_WirUeberUns);  
                GV.Vorlage_Beauty_WirUeberUns = Base64StringVorlage_Beauty_WirUeberUns;  
                string File_Vorlage_Freizeit_Grid = GV.PfadFotoVorlagen + "Vorlage_Freizeit_Grid.jpg";  
                Image ImageVorlage_Freizeit_Grid = Image.FromFile(File_Vorlage_Freizeit_Grid);  
                string Base64StringVorlage_Freizeit_Grid = ZF.BitmapToBase64(ImageVorlage_Freizeit_Grid);  
                GV.Vorlage_Freizeit_Grid = Base64StringVorlage_Freizeit_Grid;  
                string File_Vorlage_Freizeit_WirUeberUns = GV.PfadFotoVorlagen + "Vorlage_Freizeit_WirUeberUns.jpg";  
                Image ImageVorlage_Freizeit_WirUeberUns = Image.FromFile(File_Vorlage_Freizeit_WirUeberUns);  
                string Base64StringVorlage_Freizeit_WirUeberUns = ZF.BitmapToBase64(ImageVorlage_Freizeit_WirUeberUns);  
                GV.Vorlage_Freizeit_WirUeberUns = Base64StringVorlage_Freizeit_WirUeberUns;  
                string File_Vorlage_Gourmet_Grid = GV.PfadFotoVorlagen + "Vorlage_Gourmet_Grid.jpg";  
                Image ImageVorlage_Gourmet_Grid = Image.FromFile(File_Vorlage_Gourmet_Grid);  
                string Base64StringVorlage_Gourmet_Grid = ZF.BitmapToBase64(ImageVorlage_Gourmet_Grid);  
                GV.Vorlage_Gourmet_Grid = Base64StringVorlage_Gourmet_Grid;  
                string File_Vorlage_Gourmet_WirUeberUns = GV.PfadFotoVorlagen + "Vorlage_Gourmet_WirUeberUns.jpg";  
                Image ImageVorlage_Gourmet_WirUeberUns = Image.FromFile(File_Vorlage_Gourmet_WirUeberUns);  
                string Base64StringVorlage_Gourmet_WirUeberUns = ZF.BitmapToBase64(ImageVorlage_Gourmet_WirUeberUns);  
                GV.Vorlage_Gourmet_WirUeberUns = Base64StringVorlage_Gourmet_WirUeberUns;  
              }  
              catch (Exception e)  
              {  
                GV.bFehler_Ini = true;  
                Console.ForegroundColor = ConsoleColor.Red;  
                Console.WriteLine("!! Fehler beim Lesen von MatrixGuide.ini !!");  
                Console.WriteLine("Message:" + e.Message);  
                if (!(e.InnerException != null))  
                {  
                  Console.WriteLine("InnerException: " + e.InnerException.ToString());  
                }  
          
                Console.ForegroundColor = ConsoleColor.White;  
              }  
              string cTimeStamp = System.DateTime.Now.ToShortDateString() + " / " + System.DateTime.Now.Hour.ToString() + ":" + System.DateTime.Now.Minute.ToString() + ":" + System.DateTime.Now.Second.ToString();  
              string cKonsolenausgabe = "Starten von MatrixGuide - " + ZF.TimeStamp();  
              Console.WriteLine(cKonsolenausgabe);  
              CreateWebHostBuilder(args).Build().Run();  
            }  
          
            public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>  
                WebHost.CreateDefaultBuilder(args)  
                .UseStartup<Startup>()  
                ;  
          
          }

---- End Update --------------

I work with asp.net core 2.2 and start the app as console application (kestrel) on our internet server.
A valid public cert is attached (.pfx, see configuration in appsettings.json below).
Problem:

  • If I test the app internally and externally over the internet, I cannot comprehend any problem (anything works as expected).
  • I have no problems to start the app.
  • But sporadically (not to comprehend, not to provocate), I have error messages (exceptions to crashes) in the console (see below).
  • when the crashes occur, they usually occur multiple times (mostly > 10 times) - unfortunately, I cannot say in what time frame (as no timestamp’s are wrote to the console).
  • Further, I often (strangeways) have a lot of empty lines on the console after the error messages).

Appsettings.json:

{  
  "Logging": {  
    "LogLevel": {  
      "Default": "Warning"  
    }  
  },  
  "AllowedHosts": "*"  
,  
    "Kestrel": {  
        "EndPoints": {  
            "Http": {  
                "Url": "http://localhost:5001"  
            },  
            "HttpsInlineCertFile": {  
                "Url": "https://192.168.3.3",  
                "Protocols": "Http1AndHttp2",    
                "Certificate": {  
                    "Path": "./certificate_2021.pfx",  
                    "Password": "Passwort",  
                    "AllowInvalid": "true"  
                }  
            }  
        }  
    }  
}

Note: The cert is not imported in the cert-store of the server (as I think, this is not needed).
I have searched the internet for days now and have not found any hint, that drives me in the right direction.
Thanks for any help/hint in which direction, I have to search or how to provocate the crash.

Exception:

Fail: Microsoft.AspNetCore.Server.Kestrel[0]  
      Uncaught exception from the OnConnectionAsync method of an IConnectionAdapter.  
System.Net.InternalException: Exception of type 'System.Net.InternalException' was thrown.  
   at System.Net.SecurityStatusAdapterPal.GetSecurityStatusPalFromInterop(SECURITY_STATUS win32SecurityStatus, Boolean attachException)  
   at System.Net.Security.SecureChannel.GenerateToken(Byte[] input, Int32 offset, Int32 count, Byte[]& output)  
   at System.Net.Security.SecureChannel.NextMessage(Byte[] incoming, Int32 offset, Int32 count)  
   at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest)  
   at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest)  
   at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest)  
   at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest)  
   at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)  
   at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest)  
   at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest)  
   at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest)  
   at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest)  
   at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)  
   at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest)  
   at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest)  
   at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest)  
   at System.Net.Security.SslState.PartialFrameCallback(AsyncProtocolRequest asyncRequest)  
--- End of stack trace from previous location where exception was thrown ---  
   at System.Net.Security.SslState.ThrowIfExceptional()  
   at System.Net.Security.SslState.InternalEndProcessAuthentication(LazyAsyncResult lazyResult)  
   at System.Net.Security.SslState.EndProcessAuthentication(IAsyncResult result)  
   at System.Net.Security.SslStream.EndAuthenticateAsServer(IAsyncResult asyncResult)  
   at System.Net.Security.SslStream.<>c.<AuthenticateAsServerAsync>b__51_1(IAsyncResult iar)  
   at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)  
--- End of stack trace from previous location where exception was thrown ---  
   at Microsoft.AspNetCore.Server.Kestrel.Https.Internal.HttpsConnectionAdapter.InnerOnConnectionAsync(ConnectionAdapterContext context)
ASP.NET Core
ASP.NET Core
A set of technologies in the .NET Framework for building web applications and XML web services.
4,157 questions
Accepted answer
  1. Fredy Wenger 201 Reputation points
    2020-12-01T14:30:57.877+00:00

    It definitely seems as the crashes were generate by accesses over http:

    Since I have added a redirect form http to https (see code below), I had no more crashes.
    Note: I further also have added a redirect from domain to www.domain:

    Code snipped in startup.cs: 

       if (env.IsDevelopment())
      {
        app.UseDeveloperExceptionPage();
      }
      else
      {
        app.UseExceptionHandler("/Home/Error");
        app.UseHsts();
        app.UseRewriter(new RewriteOptions().AddRedirectToHttps(StatusCodes.Status301MovedPermanently, 443));
        app.UseRewriter(new RewriteOptions().AddRedirectToWww(StatusCodes.Status301MovedPermanently));
      }

    So... for me, the issue is solved this way!

    0 comments

0 additional answers

Sort by: Most helpful
Most helpful Newest Oldest