Error loading System.Buffers, Version=4.0.2.0 when using AspNet Core SignalR C# client in a .NET Framework 4.7.1 Web test #27774
Description
- clone to get the signalr chat sample at https://github.com/aspnet/SignalR-samples/tree/master/ChatSample
- open the solution, restore nuget package and Ctrl+F5 to run the service
- clone the webtest repro project at https://github.com/jeremymeng/WebTestRepro
- open
WebAndLoadTestProject2.sln, restore then build the project. You will need the web test payload for your visual studio installation to support this type of project.
- notice that the
bin\Debugdirectory has 41 files - now open the webtest.webtest file in visual studio. select Debug Test, pause before starting from the drop down
- under web test solution folder, check the most recent
TestResults\<user_machineName timestamp>\Outfolder. This is where the test is actually running. The folder only has 25 files under it. (This could be a bug in Web Test framework. I already logged a separate internal bug against VSTT team) - copy all files from bin\Debug folder into the Out folder (skip existing)
- click Run button (the first button) to continue the web test
Actual:
System.IO.InvalidDataException
HResult=0x80131501
Message=Invalid negotiation response received.
Source=Microsoft.AspNetCore.Http.Connections.Common
StackTrace:
at Microsoft.AspNetCore.Http.Connections.NegotiateProtocol.ParseResponse(Stream content)
at Microsoft.AspNetCore.Http.Connections.Client.HttpConnection.<NegotiateAsync>d__45.MoveNext()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.AspNetCore.Http.Connections.Client.HttpConnection.<GetNegotiationResponseAsync>d__52.MoveNext()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.AspNetCore.Http.Connections.Client.HttpConnection.<SelectAndStartTransport>d__44.MoveNext()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.AspNetCore.Http.Connections.Client.HttpConnection.<StartAsyncCore>d__41.MoveNext()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.AspNetCore.Http.Connections.Client.HttpConnection.<StartAsync>d__40.MoveNext()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.AspNetCore.SignalR.Client.HttpConnectionFactory.<ConnectAsync>d__3.MoveNext()
at Microsoft.AspNetCore.SignalR.Client.HttpConnectionFactory.<ConnectAsync>d__3.MoveNext()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.AspNetCore.SignalR.Client.HubConnection.<StartAsyncCore>d__31.MoveNext()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.AspNetCore.SignalR.Client.HubConnection.<StartAsync>d__24.MoveNext()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at iRel8.Service.WebTests.WebtestPlugins.SignalRJoinRoomPlugin.<PreRequest>d__0.MoveNext() in C:\github\jeremymeng\WebTestRepro\WebAndLoadTestProject2\SignalRJoinRoomPlugin.cs:line 16
Inner Exception 1:
TypeInitializationException: The type initializer for 'JsonArrayPool`1' threw an exception.
Inner Exception 2:
FileNotFoundException: Could not load file or assembly 'System.Buffers, Version=4.0.2.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its dependencies. The system cannot find the file specified.