Develop Reference

System.Net.Http.HttpRequestException for Send grid send email

We are facing following exception in calling Sendgrid Send Email function in some case.
We get this exception for 20-30 emails out of 50,000 in a day.
System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: Unknown error (0xffffffff)
at System.Net.Sockets.Socket.BeginConnectEx(EndPoint remoteEP, Boolean flowContext, AsyncCallback callback, Object state)
at System.Net.Sockets.Socket.UnsafeBeginConnect(EndPoint remoteEP, AsyncCallback callback, Object state)
at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception) --- End of inner exception stack trace ---
at System.Net.HttpWebRequest.EndGetRequestStream(IAsyncResult asyncResult, TransportContext& context)
at System.Net.Http.HttpClientHandler.GetRequestStreamCallback(IAsyncResult ar) --- End of inner exception stack trace ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at SendGrid.Helpers.Reliability.RetryDelegatingHandler.<SendAsync>d__4.MoveNext() --- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at SendGrid.BaseClient.<MakeRequest>d__20.MoveNext() --- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at SendGrid.BaseClient.<RequestAsync>d__21.MoveNext() --- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at SendGrid.BaseClient.<SendEmailAsync>d__22.MoveNext() --- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
My code to send email is
var client = new SendGridClient("API Key");
var response = await client.SendEmailAsync(message);
Can anyone please help me how can I add more verification to avoid such situation.

The Retry logic did work for me so far.
catch (Exception ex)
{
if (--retryMax == 0)
{
throw;
}
else
{
await Task.Delay(1000);
}
return null;
}

How to catch the special ServiceStack exceptions "response.FlushAsync()" from ServiceStack.HttpResponseExtensionsInternal?

The inner exception is "The remote host closed the connection. The error code is 0x80070057."
They only happen in the product environment, it's not my code, so try catch can not help.
The UncaughtExceptionHandlers also can not catch it:
UncaughtExceptionHandlers.Add((req, res, operationName, ex) => {
if (ex is HttpException && ex.Message.StartsWith("The remote host closed the connection", StringComparison.InvariantCultureIgnoreCase)) {
res.EndRequest(true);
}
});
The stack trace:
at System.Web.Hosting.IIS7WorkerRequest.RaiseCommunicationError(Int32 result, Boolean throwOnDisconnect)
at System.Web.Hosting.IIS7WorkerRequest.ExplicitFlush()
at System.Web.HttpResponse.Flush(Boolean finalFlush, Boolean async)
at System.Web.HttpWriter.WriteFromStream(Byte[] data, Int32 offset, Int32 size)
at System.IO.Stream.<>c.<BeginWriteInternal>b__46_0(Object )
at System.Threading.Tasks.Task`1.InnerInvoke()
at System.Threading.Tasks.Task.Execute()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at System.IO.Stream.EndWrite(IAsyncResult asyncResult)
at System.IO.Stream.<>c.<BeginEndWriteAsync>b__53_1(Stream stream, IAsyncResult asyncResult)
at System.Threading.Tasks.TaskFactory`1.FromAsyncTrimPromise`1.Complete(TInstance thisRef, Func`3 endMethod, IAsyncResult asyncResult, Boolean requiresSynchronization)
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at ServiceStack.StreamExtensions.<WriteToAsync>d__39.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at ServiceStack.BufferedExtensions.<FlushBufferIfAnyAsync>d__4.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at ServiceStack.Host.AspNet.AspNetResponse.<FlushAsync>d__40.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at ServiceStack.HttpResponseExtensionsInternal.<WriteToResponse>d__7.MoveNext()
loggerName: ServiceStack.HttpResponseExtensionsInternal
ServiceStack version: 5.7.0
Net Framework: 4.7.2
It happens too many times, so I want to ignore it.
How could do the trick with the internal async exception process?

You would need to filter out the error messages from ServiceStack.HttpResponseExtensionsInternal Type in your current logger implementation.

.NET Core call WCF: The server name or address could not be resolved error

I've a .NET Core 2 web api that call a connected WCF service. In my development environment it works fine, but when I deploy it in production environment, with IIS and Kestrel, I get this exception:
System.AggregateException: One or more errors occurred. (There was no endpoint listening at http://192.168.100.33:3433/Test.svc that could accept the message. This is often caused by an incorrect address or SOAP action. See InnerException, if present, for more details.) ---> System.ServiceModel.EndpointNotFoundException: There was no endpoint listening at http://192.168.100.33:3433/Test.svc that could accept the message. This is often caused by an incorrect address or SOAP action. See InnerException, if present, for more details. ---> System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.Http.WinHttpException: The server name or address could not be resolved
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Threading.Tasks.RendezvousAwaitable`1.GetResult()
at System.Net.Http.WinHttpHandler.<StartRequest>d__105.MoveNext()
--- End of inner exception stack trace ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.ServiceModel.Channels.ServiceModelHttpMessageHandler.<SendAsync>d__41.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
at System.Net.Http.HttpClient.<FinishSendAsyncUnbuffered>d__59.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.ServiceModel.Channels.HttpChannelFactory`1.HttpClientRequestChannel.HttpClientChannelAsyncRequest.<SendRequestAsync>d__13.MoveNext()
--- End of inner exception stack trace ---
at System.Runtime.AsyncResult.End[TAsyncResult](IAsyncResult result)
at System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.End(SendAsyncResult result)
at System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result)
at System.ServiceModel.Channels.ServiceChannelProxy.TaskCreator.<>c__DisplayClass1_0.<CreateGenericTask>b__0(IAsyncResult asyncResult)
--- End of inner exception stack trace ---
at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
at WebApplication1.Controllers.ValuesController.Get() in c:\temp\TestWS\WebApplication1\Controllers\ValuesController.cs:line 29
---> (Inner Exception #0) System.ServiceModel.EndpointNotFoundException: There was no endpoint listening at http://192.168.100.33:3433/Test.svc that could accept the message. This is often caused by an incorrect address or SOAP action. See InnerException, if present, for more details. ---> System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.Http.WinHttpException: The server name or address could not be resolved
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Threading.Tasks.RendezvousAwaitable`1.GetResult()
at System.Net.Http.WinHttpHandler.<StartRequest>d__105.MoveNext()
--- End of inner exception stack trace ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.ServiceModel.Channels.ServiceModelHttpMessageHandler.<SendAsync>d__41.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
at System.Net.Http.HttpClient.<FinishSendAsyncUnbuffered>d__59.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.ServiceModel.Channels.HttpChannelFactory`1.HttpClientRequestChannel.HttpClientChannelAsyncRequest.<SendRequestAsync>d__13.MoveNext()
--- End of inner exception stack trace ---
at System.Runtime.AsyncResult.End[TAsyncResult](IAsyncResult result)
at System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.End(SendAsyncResult result)
at System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result)
at System.ServiceModel.Channels.ServiceChannelProxy.TaskCreator.<>c__DisplayClass1_0.<CreateGenericTask>b__0(IAsyncResult asyncResult)<---
The same WCF service called by classic web api on the same server works fine.
If I call it by web browser from the server it work fine too.
This is my test code:
BasicHttpBinding bindingStr = new BasicHttpBinding();
EndpointAddress endpointSessionSTR = new EndpointAddress(new Uri("http://192.168.100.33:3433/Test.svc"));
TestStrutture.StruttureClient cliStr = new TestStrutture.StruttureClient(bindingStr, endpointSessionSTR);
var retVal = cliStr.GetClassiStrutturaAsync();
retVal.Wait();
var classi = retVal.Result;
What did I forget to do?

On CMD:
netsh winhttp reset proxy
You can try to list the proxys first using.
netsh winhttp show proxy
I have not discovered why this happens, but that did the trick for me. On netcore 2.0 and 2.1.

No connection is available to service this operation: ZRANGEBYSCORE redis

i'm getting this error always
asp.net core 2.0
StackExchange.Redis.StrongName 1.2.6
3 redis server 1 master 2 replica
reading from replica only and writing to master
initializing connection manager like this
public static class X
{
static string connectionString;
public static void InitializeConnectionString(string cnxString)
{
if (string.IsNullOrWhiteSpace(cnxString))
throw new ArgumentNullException(nameof(cnxString));
connectionString = cnxString;
}
private static readonly Lazy LazyConnection = new Lazy(() =>
{
var connection = ConnectionMultiplexer.Connect(connectionString);
connection.PreserveAsyncOrder = false;
return connection;
});
public static ConnectionMultiplexer SafeCoonect
{
get
{
return LazyConnection.Value;
}
}
}
StackExchange.Redis.RedisConnectionException: No connection is
available to service this operation: ZRANGEBYSCORE
xxxxx:day20171122:xxxx; It was not possible to connect to the redis
server(s); ConnectTimeout ---> System.AggregateException: One or more
errors occurred. (It was not possible to connect to the redis
server(s); ConnectTimeout) (It was not possible to connect to the
redis server(s); ConnectTimeout) (It was not possible to connect to
the redis server(s); ConnectTimeout) (It was not possible to connect
to the redis server(s); ConnectTimeout) --->
StackExchange.Redis.RedisConnectionException: It was not possible to
connect to the redis server(s); ConnectTimeout --- End of inner
exception stack trace --- --- End of inner exception stack trace ---
at
StackExchange.Redis.ConnectionMultiplexer.ThrowFailed[T](TaskCompletionSource`1
source, Exception unthrownException) in
x:\code\StackExchange.Redis\StackExchange.Redis\StackExchange\Redis\ConnectionMultiplexer.cs:line
2000 --- End of stack trace from previous location where exception was
thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at y.d__12.MoveNext() in x:\x.cs:line 163 --- End of stack trace
from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at y.d__8.MoveNext() in x:\x.cs:line 70 --- End of stack trace
from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at z.d__14.MoveNext() in z:\z\z.cs:line 113 --- End of stack
trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at lambda_method(Closure , Object ) at
Microsoft.Extensions.Internal.ObjectMethodExecutorAwaitable.Awaiter.GetResult()
at
Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.d__12.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.d__10.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Rethrow(ActionExecutedContext
context) at
Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Next(State&
next, Scope& scope, Object& state, Boolean& isCompleted) at
Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.d__14.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.d__22.MoveNext() ---
End of stack trace from previous location where exception was thrown
--- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Rethrow(ResourceExecutedContext
context) at
Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Next(State& next,
Scope& scope, Object& state, Boolean& isCompleted) at
Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.d__17.MoveNext() ---
End of stack trace from previous location where exception was thrown
--- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.d__15.MoveNext() ---
End of stack trace from previous location where exception was thrown
--- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at Microsoft.AspNetCore.Builder.RouterMiddleware.d__4.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
NWebsec.AspNetCore.Middleware.Middleware.MiddlewareBase.d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
NWebsec.AspNetCore.Middleware.Middleware.MiddlewareBase.d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
NWebsec.AspNetCore.Middleware.Middleware.MiddlewareBase.d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.d__6.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
Microsoft.AspNetCore.Session.SessionMiddleware.d__9.MoveNext() --- End
of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
Microsoft.AspNetCore.Session.SessionMiddleware.d__9.MoveNext() --- End
of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at Microsoft.AspNetCore.Builder.RouterMiddleware.d__4.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.d__6.MoveNext()

This post is a bit old, but in case others run into it.
Github issues, list this as fixed in version 2.X
https://github.com/StackExchange/StackExchange.Redis/issues/871
871 also lists the above stackexchange question
https://github.com/StackExchange/StackExchange.Redis/issues/743

The client disconnected

I'm getting the following error in logs for WebAPI
System.Web.HttpException (0x800703E3): The client disconnected. at
System.Web.Hosting.IIS7WorkerRequest.EndRead(IAsyncResult asyncResult)
at System.Web.HttpBufferlessInputStream.EndRead(IAsyncResult
asyncResult) at System.Threading.Tasks.TaskFactory
1.FromAsyncTrimPromise 1.Complete(TInstance thisRef, Func 3 endMethod, IAsyncResult asyncResult, Boolean requiresSynchronization)
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task
task) at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at System.IO.StreamReader.d__97.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task
task) at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
System.IO.StreamReader.d__62.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task
task) at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at Microsoft.Owin.OwinRequest.d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task
task) at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
Microsoft.Owin.Security.OAuth.OAuthAuthorizationServerHandler.d__22.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task
task) at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
Microsoft.Owin.Security.OAuth.OAuthAuthorizationServerHandler.d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task
task) at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at
Microsoft.Owin.Security.Infrastructure.AuthenticationMiddleware
1.d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task
task) at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task) at Web.API.Middleware.OwinMiddleware.d__1.MoveNext()
in D:\UAT\Web.API\Middleware\OwinMiddleware.cs:line 49
How can I handle and ignore these exceptions by exception filter? Why this error occurs and how can I reproduce that? I wanna catch and ignore only The client disconnected but not all HttpException
I saw this similar question but how can I do that in exception filter?

You can ignore these exceptions.
The exception says what the problem is: "The client disconnected". It means that the client initiated a request but then disconnected before it bothered to read all of the response.
There are any numbers of reasons why that might be the case, but (unless you have a dodgy internet connection at your server end) it is almost certainly an issue at the client end. I regularly see these myself and mostly it seems to be related to a bot. So I filter them out and ignore them.

try
{
// Open Connection
// Do stuff
}
catch (HttpException ex)
{
// Log it?
// Ignore it?
// Do what you want with it?
}
finally
{
// Close connection
}