GetAsync_IPv6LinkLocalAddressUri_Success consistently failing locally

[stephentoub]

When I run all System.Net.Http.Functional.Tests locally, the GetAsync_IPv6LinkLocalAddressUri_Success test consistently fails for me, on both WinHttpHandler and SocketsHttpHandler. Is this a known issue? Is my machine potentially configured in a way the test doesn't like?

System.Net.Http.Functional.Tests.PlatformHandler_HttpClientHandlerTest.GetAsync_IPv6LinkLocalAddressUri_Success [FAIL]
        System.Net.Http.HttpRequestException : An error occurred while sending the request.
        ---- System.Net.Http.WinHttpException : Error 12002 calling WINHTTP_CALLBACK_STATUS_REQUEST_ERROR, 'The operation timed out'.
        Stack Trace:
          d:\repos\corefx\src\System.Net.Http\src\System\Net\Http\HttpClient.cs(475,0): at System.Net.Http.HttpClient.FinishSendAsyncBuffered(Task`1 sendTask, HttpRequestMessage req
  uest, CancellationTokenSource cts, Boolean disposeCts)
          d:\repos\corefx\src\Common\tests\System\Threading\Tasks\TaskTimeoutExtensions.cs(64,0): at System.Threading.Tasks.TaskTimeoutExtensions.WhenAllOrAnyFailed(Task[] tasks)
          d:\repos\corefx\src\Common\tests\System\Threading\Tasks\TaskTimeoutExtensions.cs(92,0): at System.Threading.Tasks.TaskTimeoutExtensions.WhenAllOrAnyFailed(Task[] tasks)
          d:\repos\corefx\src\System.Net.Http\tests\FunctionalTests\HttpClientHandlerTest.cs(369,0): at System.Net.Http.Functional.Tests.HttpClientHandlerTest.<>c__DisplayClass34_0.
  <<GetAsync_IPv6LinkLocalAddressUri_Success>b__0>d.MoveNext()
          --- End of stack trace from previous location where exception was thrown ---
          d:\repos\corefx\src\Common\tests\System\Net\Http\LoopbackServer.cs(66,0): at System.Net.Test.Common.LoopbackServer.CreateServerAsync(Func`2 funcAsync, Options options)
          d:\repos\corefx\src\System.Net.Http\tests\FunctionalTests\HttpClientHandlerTest.cs(366,0): at System.Net.Http.Functional.Tests.HttpClientHandlerTest.GetAsync_IPv6LinkLocal
  AddressUri_Success()
          --- End of stack trace from previous location where exception was thrown ---
          ----- Inner Stack Trace -----
          d:\repos\corefx\src\System.Runtime.Extensions\src\System\Environment.cs(146,0): at System.Environment.get_StackTrace()
          d:\repos\corefx\src\Common\src\System\Runtime\ExceptionServices\ExceptionStackTrace.cs(23,0): at System.Runtime.ExceptionServices.ExceptionStackTrace.AddCurrentStack(Excep
  tion exception)
          d:\repos\corefx\src\System.Net.Http.WinHttpHandler\src\System\Net\Http\WinHttpException.cs(57,0): at System.Net.Http.WinHttpException.CreateExceptionUsingError(Int32 error
  , String nameOfCalledFunction)
          d:\repos\corefx\src\System.Net.Http.WinHttpHandler\src\System\Net\Http\WinHttpRequestCallback.cs(333,0): at System.Net.Http.WinHttpRequestCallback.OnRequestError(WinHttpRe
  questState state, WINHTTP_ASYNC_RESULT asyncResult)
          d:\repos\corefx\src\System.Net.Http.WinHttpHandler\src\System\Net\Http\WinHttpRequestCallback.cs(104,0): at System.Net.Http.WinHttpRequestCallback.RequestCallback(IntPtr h
  andle, WinHttpRequestState state, UInt32 internetStatus, IntPtr statusInformation, UInt32 statusInformationLength)
          d:\repos\corefx\src\System.Net.Http.WinHttpHandler\src\System\Net\Http\WinHttpRequestCallback.cs(47,0): at System.Net.Http.WinHttpRequestCallback.WinHttpCallback(IntPtr ha
  ndle, IntPtr context, UInt32 internetStatus, IntPtr statusInformation, UInt32 statusInformationLength)
          --- End of stack trace from AddCurrentStack ---
          d:\repos\corefx\src\Common\src\System\Threading\Tasks\RendezvousAwaitable.cs(62,0): at System.Threading.Tasks.RendezvousAwaitable`1.GetResult()
          d:\repos\corefx\src\System.Net.Http.WinHttpHandler\src\System\Net\Http\WinHttpHandler.cs(878,0): at System.Net.Http.WinHttpHandler.StartRequest(WinHttpRequestState state)
        Output:
          http://[fe80::f188:5f13:aa00:ac29]:60833/


System.Net.Http.Functional.Tests.SocketsHttpHandler_HttpClientHandlerTest.GetAsync_IPv6LinkLocalAddressUri_Success [FAIL]
        System.Net.Http.HttpRequestException : A connection attempt failed because the connected party did not properly respond after a period of time, or established connection fai
  led because connected host has failed to respond.
        ---- System.Net.Sockets.SocketException : A connection attempt failed because the connected party did not properly respond after a period of time, or established connection
  failed because connected host has failed to respond.
        Stack Trace:
          d:\repos\corefx\src\System.Net.Http\src\System\Net\Http\SocketsHttpHandler\ConnectHelper.cs(84,0): at System.Net.Http.ConnectHelper.ConnectAsync(String host, Int32 port, C
  ancellationToken cancellationToken)
          d:\repos\coreclr\src\System.Private.CoreLib\shared\System\Threading\Tasks\ValueTask.cs(854,0): at System.Threading.Tasks.ValueTask`1.get_Result()
          d:\repos\corefx\src\System.Net.Http\src\System\Net\Http\SocketsHttpHandler\HttpConnectionPool.cs(569,0): at System.Net.Http.HttpConnectionPool.ConnectAsync(HttpRequestMess
  age request, Boolean allowHttp2, CancellationToken cancellationToken)
          d:\repos\coreclr\src\System.Private.CoreLib\shared\System\Threading\Tasks\ValueTask.cs(854,0): at System.Threading.Tasks.ValueTask`1.get_Result()
          d:\repos\corefx\src\System.Net.Http\src\System\Net\Http\SocketsHttpHandler\HttpConnectionPool.cs(607,0): at System.Net.Http.HttpConnectionPool.CreateHttp11ConnectionAsync(
  HttpRequestMessage request, CancellationToken cancellationToken)
          d:\repos\coreclr\src\System.Private.CoreLib\shared\System\Threading\Tasks\ValueTask.cs(854,0): at System.Threading.Tasks.ValueTask`1.get_Result()
          d:\repos\corefx\src\System.Net.Http\src\System\Net\Http\SocketsHttpHandler\HttpConnectionPool.cs(728,0): at System.Net.Http.HttpConnectionPool.WaitForCreatedConnectionAsyn
  c(ValueTask`1 creationTask)
          d:\repos\coreclr\src\System.Private.CoreLib\shared\System\Threading\Tasks\ValueTask.cs(854,0): at System.Threading.Tasks.ValueTask`1.get_Result()
          d:\repos\corefx\src\System.Net.Http\src\System\Net\Http\SocketsHttpHandler\HttpConnectionPool.cs(466,0): at System.Net.Http.HttpConnectionPool.SendWithRetryAsync(HttpReque
  stMessage request, Boolean doRequestAuth, CancellationToken cancellationToken)
          d:\repos\corefx\src\System.Net.Http\src\System\Net\Http\SocketsHttpHandler\RedirectHandler.cs(33,0): at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage reques
  t, CancellationToken cancellationToken)
          d:\repos\corefx\src\System.Net.Http\src\System\Net\Http\HttpClient.cs(475,0): at System.Net.Http.HttpClient.FinishSendAsyncBuffered(Task`1 sendTask, HttpRequestMessage req
  uest, CancellationTokenSource cts, Boolean disposeCts)
          d:\repos\corefx\src\Common\tests\System\Threading\Tasks\TaskTimeoutExtensions.cs(64,0): at System.Threading.Tasks.TaskTimeoutExtensions.WhenAllOrAnyFailed(Task[] tasks)
          d:\repos\corefx\src\Common\tests\System\Threading\Tasks\TaskTimeoutExtensions.cs(92,0): at System.Threading.Tasks.TaskTimeoutExtensions.WhenAllOrAnyFailed(Task[] tasks)
          d:\repos\corefx\src\System.Net.Http\tests\FunctionalTests\HttpClientHandlerTest.cs(369,0): at System.Net.Http.Functional.Tests.HttpClientHandlerTest.<>c__DisplayClass34_0.
  <<GetAsync_IPv6LinkLocalAddressUri_Success>b__0>d.MoveNext()
          --- End of stack trace from previous location where exception was thrown ---
          d:\repos\corefx\src\Common\tests\System\Net\Http\LoopbackServer.cs(66,0): at System.Net.Test.Common.LoopbackServer.CreateServerAsync(Func`2 funcAsync, Options options)
          d:\repos\corefx\src\System.Net.Http\tests\FunctionalTests\HttpClientHandlerTest.cs(366,0): at System.Net.Http.Functional.Tests.HttpClientHandlerTest.GetAsync_IPv6LinkLocal
  AddressUri_Success()
          --- End of stack trace from previous location where exception was thrown ---
          ----- Inner Stack Trace -----
          d:\repos\corefx\src\System.Net.Http\src\System\Net\Http\SocketsHttpHandler\ConnectHelper.cs(65,0): at System.Net.Http.ConnectHelper.ConnectAsync(String host, Int32 port, C
  ancellationToken cancellationToken)
        Output:
          http://[fe80::f188:5f13:aa00:ac29]:61206/

[davidsh]

Is this a known issue? Is my machine potentially configured in a way the test doesn't like?

I think it might have something to do with VPN use. Is any VPN being used? I.e. to corpnet or something?

[stephentoub]

I'm not VPN'd in, but I do have multiple VPN configurations (i.e. I can VPN in but I'm not currently connected to corpnet through them).

[davidsh]

but I do have multiple VPN configurations

I think this generates additional IPv6 link-local addresses but some of those aren't connected maybe. We need to fix the tests to be smarter about this.

[wfurt]

TestHelper.cs already does:

        public static IPAddress GetIPv6LinkLocalAddress() =>
            NetworkInterface
                .GetAllNetworkInterfaces()
                .Where(i => i.Description != "PANGP Virtual Ethernet Adapter")      // This is a VPN adapter, but is reported as a regular Ethernet interface with
                                                                                    // a valid link-local address, but the link-local address doesn't actually work.
                                                                                    // So just manually filter it out.
                .SelectMany(i => i.GetIPProperties().UnicastAddresses)
                .Select(a => a.Address)
                .Where(a => a.IsIPv6LinkLocal)
                .FirstOrDefault();

Maybe this should get more generalized. I don't think we would loose much at HTTP level if we skip all VPN interfaces. if anything that should be handled at socket level.

[geoffkizer]

I'm seeing this again too. The description I see now is "PANGP Virtual Ethernet Adapter dotnet/corefx#3" which is not matching the check above.

@stephentoub Are you still seeing this? What's the description for the adapter with the IP that's causing this? (run "ipconfig all")