SignalR HubConnection StopAsync throws ObjectDisposedException - c#

We have a WPF client that connects with SignalR to one of our servers. When closing the WPF client we also close the SignalR HubConnection:
public HubConnection Connection => _connection ??= GetConnection();
private HubConnection GetConnection()
{
var host = ConfigurationManager.AppSettings["SignalRHost"];
var connection = new HubConnectionBuilder()
.WithUrl(host)
.Build();
connection.Closed += ConnectionOnClosed;
return connection;
}
private async Task ConnectionOnClosed(Exception exception)
{
// The connection is disconnected
if (_disconnecting)
{
// The disconnect was requested by the client
Connection.Closed -= ConnectionOnClosed;
Logger.Information("The connection to SignalR hub was closed.");
}
else
{
await StartAsync();
}
}
public async Task Disconnect()
{
if (_disconnecting) return;
try
{
_disconnecting = true;
await _connection.StopAsync();
}
catch (Exception e)
{
Logger.Error(e, "Error in closing connection");
}
finally
{
await _connection.DisposeAsync();
_connection = null;
}
}
Calling CloseAsync results in two ObjectDisposedExceptions. I only have a partial stacktrace (that seems to be another problem in my VS):
System.dll!System.Net.Sockets.NetworkStream.InternalSocket.get() Line 136
System.dll!System.Net.PooledStream.CancelPendingIoAndCloseIfSafe(bool closeWithTimeout, int timeout) Line 596
System.dll!System.Net.PooledStream.Close(int timeout) Line 682
System.dll!System.Net.Connection.AbortOrDisassociate(System.Net.HttpWebRequest request, System.Net.WebException webException) Line 2859
System.dll!System.Net.HttpWebRequest.Abort(System.Exception exception, int abortState) Line 3173
System.dll!System.Net.HttpWebRequest.Abort() Line 3133
System.dll!System.Net.WebSockets.ClientWebSocket.AbortRequest(object obj) Line 366
mscorlib.dll!System.Threading.CancellationCallbackInfo.ExecutionContextCallback(object obj) Line 1031
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Line 980
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Line 928
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) Line 917
mscorlib.dll!System.Threading.CancellationCallbackInfo.ExecuteCallback() Line 1021
mscorlib.dll!System.Threading.CancellationTokenSource.CancellationCallbackCoreWork(System.Threading.CancellationCallbackCoreWorkArguments args) Line 863
mscorlib.dll!System.Threading.CancellationTokenSource.ExecuteCallbackHandlers(bool throwOnFirstException) Line 808
mscorlib.dll!System.Threading.CancellationTokenSource.NotifyCancellation(bool throwOnFirstException) Line 743
System.dll!System.Net.WebSockets.ClientWebSocket.Dispose() Line 377
System.dll!System.Net.WebSockets.ClientWebSocket.Abort() Line 360
Microsoft.AspNetCore.Http.Connections.Client.dll!Microsoft.AspNetCore.Http.Connections.Client.Internal.WebSocketsTransport.ProcessSocketAsync(System.Net.WebSockets.WebSocket socket) Line 220
And the next:
> System.dll!System.Net.Sockets.NetworkStream.InternalSocket.get() Line 136 C#
System.dll!System.Net.PooledStream.CancelPendingIoAndCloseIfSafe(bool closeWithTimeout, int timeout) Line 596 C#
System.dll!System.Net.PooledStream.Close(int timeout) Line 682 C#
System.dll!System.Net.Connection.AbortSocket(bool isAbortState) Line 2901 C#
System.dll!System.Net.ConnectStream.CloseInternal(bool internalCall, bool aborting) Line 2707 C#
System.dll!System.Net.ConnectStream.System.Net.ICloseEx.CloseEx(System.Net.CloseExState closeState) Line 2426 C#
System.dll!System.Net.HttpWebResponse.Abort() Line 479 C#
System.dll!System.Net.HttpWebRequest.SetResponse(System.Exception E) Line 3968 C#
System.dll!System.Net.HttpWebRequest.SetAndOrProcessResponse(object responseOrException) Line 3661 C#
System.dll!System.Net.ConnectionReturnResult.SetResponses(System.Net.ConnectionReturnResult returnResult) Line 205 C#
System.dll!System.Net.Connection.AbortOrDisassociate(System.Net.HttpWebRequest request, System.Net.WebException webException) Line 2873 C#
System.dll!System.Net.HttpWebRequest.Abort(System.Exception exception, int abortState) Line 3173 C#
System.dll!System.Net.HttpWebRequest.Abort() Line 3133 C#
System.Net.Http.dll!System.Net.Http.HttpClientHandler.OnCancel(object state) Line 1210 C#
mscorlib.dll!System.Threading.CancellationCallbackInfo.ExecutionContextCallback(object obj) Line 1031 C#
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Line 980 C#
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Line 928 C#
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) Line 917 C#
mscorlib.dll!System.Threading.CancellationCallbackInfo.ExecuteCallback() Line 1021 C#
mscorlib.dll!System.Threading.CancellationTokenSource.CancellationCallbackCoreWork(System.Threading.CancellationCallbackCoreWorkArguments args) Line 863 C#
mscorlib.dll!System.Threading.CancellationTokenSource.ExecuteCallbackHandlers(bool throwOnFirstException) Line 808 C#
mscorlib.dll!System.Threading.CancellationTokenSource.NotifyCancellation(bool throwOnFirstException) Line 743 C#
mscorlib.dll!System.Threading.CancellationTokenSource.LinkedTokenCancelDelegate(object source) Line 91 C#
mscorlib.dll!System.Threading.CancellationCallbackInfo.ExecutionContextCallback(object obj) Line 1031 C#
mscorlib.dll!System.Threading.CancellationCallbackInfo.ExecuteCallback() Line 1021 C#
mscorlib.dll!System.Threading.CancellationTokenSource.CancellationCallbackCoreWork(System.Threading.CancellationCallbackCoreWorkArguments args) Line 863 C#
mscorlib.dll!System.Threading.CancellationTokenSource.ExecuteCallbackHandlers(bool throwOnFirstException) Line 808 C#
mscorlib.dll!System.Threading.CancellationTokenSource.NotifyCancellation(bool throwOnFirstException) Line 743 C#
mscorlib.dll!System.Threading.CancellationTokenSource.TimerCallbackLogic(object obj) Line 534 C#
mscorlib.dll!System.Threading.TimerQueueTimer.CallCallbackInContext(object state) Line 730 C#
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Line 980 C#
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Line 928 C#
mscorlib.dll!System.Threading.TimerQueueTimer.CallCallback() Line 713 C#
mscorlib.dll!System.Threading.TimerQueueTimer.Fire() Line 670 C#
mscorlib.dll!System.Threading.TimerQueue.FireQueuedTimerCompletion(object state) Line 444 C#
mscorlib.dll!System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem() Line 1252 C#
mscorlib.dll!System.Threading.ThreadPoolWorkQueue.Dispatch() Line 820 C#
mscorlib.dll!System.Threading._ThreadPoolWaitCallback.PerformWaitCallback() Line 1161 C#
The server is running in Visual Studio at http://localhost:5008/tubahub. When running the server in IIS on the same machine we also get a SocketException when calling StopAsync due to a timeout. Perhaps that is related.

Related

Game-Server running on local machine but not on ubuntu server

My Server (System.Net) is working on my local mashine (win10), but not on the ubuntu server, i get this error:
Unhandled exception. System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values. (Parameter 'size')
at System.Net.Sockets.NetworkStream.BeginRead(Byte[] buffer, Int32 offset, Int32 size, AsyncCallback callback, Object state)
at Server.Client.Start() in C:\Users\xxxx\source\repos\Server\Server\Client.cs:line 28
at Server.ClientManager.CreateNewConnection(TcpClient tempClient) in C:\Users\xxxx\source\repos\Server\Server\ClientManager.cs:line 19
at Server.Server.OnClientConnect(IAsyncResult result) in C:\Users\xxxx\source\repos\Server\Server\Server.cs:line 61
at System.Net.LazyAsyncResult.Complete(IntPtr userToken)
at System.Net.ContextAwareResult.CompleteCallback()
at System.Net.ContextAwareResult.<>c.<Complete>b__15_0(Object s)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
--- End of stack trace from previous location where exception was thrown ---
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Net.ContextAwareResult.Complete(IntPtr userToken)
at System.Net.LazyAsyncResult.ProtectedInvokeCallback(Object result, IntPtr userToken)
at System.Net.Sockets.BaseOverlappedAsyncResult.CompletionCallback(Int32 numBytes, SocketError errorCode)
at System.Net.Sockets.AcceptOverlappedAsyncResult.CompletionCallback(IntPtr acceptedFileDescriptor, Byte[] socketAddress, Int32 socketAddressLen, SocketError errorCode)
at System.Net.Sockets.SocketAsyncContext.AcceptOperation.InvokeCallback(Boolean allowPooling)
at System.Net.Sockets.SocketAsyncContext.OperationQueue`1.ProcessAsyncOperation(TOperation op)
at System.Net.Sockets.SocketAsyncContext.ReadOperation.System.Threading.IThreadPoolWorkItem.Execute()
at System.Threading.ThreadPoolWorkQueue.Dispatch()
at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()
Aborted (core dumped)
this is the code thats causing the error (its working on my local):
socket.SendBufferSize = 4096;
socket.ReceiveBufferSize = 4096;
stream = socket.GetStream();
recBuffer = new byte[4096];
stream.BeginRead(recBuffer, 0, socket.ReceiveBufferSize, OnReceiveData, null);
Console.WriteLine($"Connection from {socket.Client.RemoteEndPoint.ToString()}");
when i listen with netcat to the port im using (55555) and connect in the game, the connection works, so i think the port/firewall is fine.
i tried exporting it as a linux build, and as a windows build, which i executed via wine, both didn't work.
this is how i published it:
publish

Loop until connected to server with BeginConnect (C# sockets)

I need a method that attempts to connect to the server until it successfully connects. I've done so successfully with Socket.Connect but I can't get it to work with Socket.BeginConnect.
This is the method:
public void Start()
{
while (clientSocket == null || !clientSocket.Connected)
{
try
{
clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
clientSocket.BeginConnect(serverEndPoint, new AsyncCallback(ConnectCallback), null);
}
catch (SocketException)
{
clientSocket.Close();
Start();
}
catch (Exception) { throw; }
}
}
private void ConnectCallback(IAsyncResult ar)
{
try
{
clientSocket.EndConnect(ar);
clientSocket.BeginReceive(buffer, 0, buffer.Length, SocketFlags.None, new AsyncCallback(ReceiveCallback), null);
}
catch (Exception) { throw; }
}
But I get this error (multiple times):
System.ArgumentException: The IAsyncResult object was not returned
from the corresponding asynchronous method on this class. Parameter
name: asyncResult at
System.Net.Sockets.Socket.InternalEndConnect(IAsyncResult asyncResult)
at System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult) at
SocketLibrary.Client.TCPClient.ConnectCallback(IAsyncResult ar) at
System.Net.LazyAsyncResult.Complete(IntPtr userToken) at
System.Net.ContextAwareResult.CompleteCallback(Object state) at
System.Threading.ExecutionContext.RunInternal(ExecutionContext
executionContext, ContextCallback callback, Object state, Boolean
preserveSyncCtx) at
System.Threading.ExecutionContext.Run(ExecutionContext
executionContext, ContextCallback callback, Object state, Boolean
preserveSyncCtx) at
System.Threading.ExecutionContext.Run(ExecutionContext
executionContext, ContextCallback callback, Object state) at
System.Net.ContextAwareResult.Complete(IntPtr userToken) at
System.Net.LazyAsyncResult.ProtectedInvokeCallback(Object result,
IntPtr userToken) at System.Net.Sockets.Socket.ConnectCallback() at
System.Net.Sockets.Socket.RegisteredWaitCallback(Object state, Boolean
timedOut) at
System.Threading._ThreadPoolWaitOrTimerCallback.PerformWaitOrTimerCallback(Object
state, Boolean timedOut)
I tried catching the ArgumentException but then I got this error (multiple times again)
Unhandled Exception: System.NullReferenceException: Object reference
not set to an instance of an object. at
SocketLibrary.Client.TCPClient.ConnectCallback(IAsyncResult ar) at
System.Net.LazyAsyncResult.Complete(IntPtr userToken) at
System.Net.ContextAwareResult.CompleteCallback(Object state) at
System.Threading.ExecutionContext.RunInternal(ExecutionContext
executionContext, ContextCallback callback, Object state, Boolean
preserveSyncCtx) at
System.Threading.ExecutionContext.Run(ExecutionContext
executionContext, ContextCallback callback, Object state, Boolean
preserveSyncCtx) at
System.Threading.ExecutionContext.Run(ExecutionContext
executionContext, ContextCallback callback, Object state) at
System.Net.ContextAwareResult.Complete(IntPtr userToken) at
System.Net.LazyAsyncResult.ProtectedInvokeCallback(Object result,
IntPtr userToken) at System.Net.Sockets.Socket.ConnectCallback() at
System.Net.Sockets.Socket.RegisteredWaitCallback(Object state, Boolean
timedOut) at
System.Threading._ThreadPoolWaitOrTimerCallback.PerformWaitOrTimerCallback(Object
state, Boolean timedOut)
I'm fairly new to working with sockets (and I've only been programming for a couple of months) so I'm sure I'm going about this entirely wrong so I'd appreciate any help/suggestions.

Since you haven't posted complete code, I am assuming you are trying to use global client object. In the ConnectCallback, you need to first retrieve and typecast the client object into a Socket. So in your case, it would be:
private static void ConnectCallback(IAsyncResult ar)
{
try
{
// Retrieve the socket from the state object.
client = (Socket) ar.AsyncState;
//In case, you are using local client object
//Socket client = (Socket) ar.AsyncState;
// Complete the connection.
client.EndConnect(ar);
Console.WriteLine("Socket connected to {0}",
client.RemoteEndPoint.ToString());
// Signal that the connection has been made.
connectDone.Set();
} catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
The above code is taken from this MSDN example, have a look at it. If you fix, the first step in your approach, it should work.

Entity Framework Core async/wait deadlock when using "one-to-many" relationship and WebApi

I'm encountering a deadlock when using asynchronous implementation of an EF Core provider.
Say I have the following models:
public class Player
{
public string PlayerId { get; set;}
public string Name { get; set;}
public List<Game> Games { get; set;}
}
public class Game
{
public string GameId { get; set; }
public string PlayerId { get; set; }
public Player Player { get; set;}
}
Now I want to run the following query:
ctx.Players
.Include(p => p.Games)
.Where(p => p.PlayerId == "123")
.Select(p => new {
PlayerId = p.PlayerId,
Games = p.Games.ToList()
}).ToListAsync();
When I run this code via Console Application/XUnit test it works as excepted...
But when I run it via ASP.Net WebApi it get into deadlock and never ends...
I used ConfigureAwait(false) all the way down in order to prevent these kind of situations but it seems that the problematic code is down underneath.
I think that it might be under the System.Interactive.Async library which EFCore use - To be more specific it is under: https://github.com/Reactive-Extensions/Rx.NET/blob/develop/Ix.NET/Source/System.Interactive.Async/ToAsyncEnumerable.cs#L72
there is a call to "Result" which actually blocks the execution thread.
Does anyone encountered this behavior, maybe there is some workaround?
Notice that if I don't load the "Games" entities then everything also works fine...
Edit: Added the StackTrace: (See the call to ToEnumerable)
Not Flagged 21672 5 Worker Thread grpc 0 (cq 0) System.Interactive.Async.dll!System.Linq.AsyncEnumerable.**ToEnumerable_**<NG.Admin.BL.DAL.Entities.Game> Normal
mscorlib.dll!System.Threading.Monitor.Wait(object obj, int millisecondsTimeout, bool exitContext)
mscorlib.dll!System.Threading.Monitor.Wait(object obj, int millisecondsTimeout)
mscorlib.dll!System.Threading.ManualResetEventSlim.Wait(int millisecondsTimeout, System.Threading.CancellationToken cancellationToken)
mscorlib.dll!System.Threading.Tasks.Task.SpinThenBlockingWait(int millisecondsTimeout, System.Threading.CancellationToken cancellationToken)
mscorlib.dll!System.Threading.Tasks.Task.InternalWait(int millisecondsTimeout, System.Threading.CancellationToken cancellationToken)
mscorlib.dll!System.Threading.Tasks.Task.GetResultCore(bool waitCompletionNotification)
mscorlib.dll!System.Threading.Tasks.Task.Result.get()
System.Interactive.Async.dll!System.Linq.AsyncEnumerable.ToEnumerable_<NG.Admin.BL.DAL.Entities.Game>(System.Collections.Generic.IAsyncEnumerable<NG.Admin.BL.DAL.Entities.Game> source)
mscorlib.dll!System.Collections.Generic.List<NG.Admin.BL.DAL.Entities.Game>.List(System.Collections.Generic.IEnumerable<NG.Admin.BL.DAL.Entities.Game> collection)
System.Core.dll!System.Linq.Enumerable.ToList<NG.Admin.BL.DAL.Entities.Game>(System.Collections.Generic.IEnumerable<NG.Admin.BL.DAL.Entities.Game> source)
[Lightweight Function]
Microsoft.EntityFrameworkCore.dll!Microsoft.EntityFrameworkCore.Query.Internal.AsyncLinqOperatorProvider.SelectAsyncEnumerable<Microsoft.EntityFrameworkCore.Storage.ValueBuffer, NG.Admin.BL.Api.Player>.SelectAsyncEnumerator.MoveNext(System.Threading.CancellationToken cancellationToken)
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.InvokeMoveNext(object stateMachine)
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.OutputAsyncCausalityEvents.AnonymousMethod__0()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()
mscorlib.dll!System.Runtime.CompilerServices.TaskAwaiter.OutputWaitEtwEvents.AnonymousMethod__0()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()
mscorlib.dll!System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Action action, bool allowInlining, ref System.Threading.Tasks.Task currentTask)
mscorlib.dll!System.Threading.Tasks.Task.FinishContinuations()
mscorlib.dll!System.Threading.Tasks.Task.FinishStageThree()
mscorlib.dll!System.Threading.Tasks.Task.TrySetResult(bool result)
mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder.SetResult(bool result)
NG.Data.Spanner.EF.dll!NG.Data.Spanner.EF.Query.Internal.SpannerAsyncQueryingEnumerable<Microsoft.EntityFrameworkCore.Storage.ValueBuffer>.SpannerAsyncEnumerator.MoveNext(System.Threading.CancellationToken cancellationToken) Line 55
[Resuming Async Method]
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.InvokeMoveNext(object stateMachine)
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.OutputAsyncCausalityEvents.AnonymousMethod__0()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()
mscorlib.dll!System.Runtime.CompilerServices.TaskAwaiter.OutputWaitEtwEvents.AnonymousMethod__0()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()
mscorlib.dll!System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Action action, bool allowInlining, ref System.Threading.Tasks.Task currentTask)
mscorlib.dll!System.Threading.Tasks.Task.FinishContinuations()
mscorlib.dll!System.Threading.Tasks.Task.FinishStageThree()
mscorlib.dll!System.Threading.Tasks.Task.TrySetResult(bool result)
mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder.SetResult(bool result)
Microsoft.EntityFrameworkCore.dll!Microsoft.EntityFrameworkCore.Query.Internal.AsyncLinqOperatorProvider.SelectAsyncEnumerable<Microsoft.EntityFrameworkCore.Storage.ValueBuffer, Microsoft.EntityFrameworkCore.Storage.ValueBuffer>.SelectAsyncEnumerator.MoveNext(System.Threading.CancellationToken cancellationToken)
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.InvokeMoveNext(object stateMachine)
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.OutputAsyncCausalityEvents.AnonymousMethod__0()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()
mscorlib.dll!System.Runtime.CompilerServices.TaskAwaiter.OutputWaitEtwEvents.AnonymousMethod__0()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()
mscorlib.dll!System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Action action, bool allowInlining, ref System.Threading.Tasks.Task currentTask)
mscorlib.dll!System.Threading.Tasks.Task.FinishContinuations()
mscorlib.dll!System.Threading.Tasks.Task.FinishStageThree()
mscorlib.dll!System.Threading.Tasks.Task.TrySetResult(bool result)
mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder.SetResult(bool result)
Microsoft.EntityFrameworkCore.Relational.dll!Microsoft.EntityFrameworkCore.Query.Internal.AsyncQueryingEnumerable.AsyncEnumerator.MoveNext(System.Threading.CancellationToken cancellationToken)
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.InvokeMoveNext(object stateMachine)
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.OutputAsyncCausalityEvents.AnonymousMethod__0()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()
mscorlib.dll!System.Runtime.CompilerServices.TaskAwaiter.OutputWaitEtwEvents.AnonymousMethod__0()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()
mscorlib.dll!System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Action action, bool allowInlining, ref System.Threading.Tasks.Task currentTask)
mscorlib.dll!System.Threading.Tasks.Task.FinishContinuations()
mscorlib.dll!System.Threading.Tasks.Task.FinishStageThree()
mscorlib.dll!System.Threading.Tasks.Task.TrySetResult(bool result)
mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder.SetResult(bool result)
Microsoft.EntityFrameworkCore.Relational.dll!Microsoft.EntityFrameworkCore.Query.Internal.AsyncQueryingEnumerable.AsyncEnumerator.BufferlessMoveNext(bool buffer, System.Threading.CancellationToken cancellationToken)
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.InvokeMoveNext(object stateMachine)
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.OutputAsyncCausalityEvents.AnonymousMethod__0()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()
mscorlib.dll!System.Runtime.CompilerServices.TaskAwaiter.OutputWaitEtwEvents.AnonymousMethod__0()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()
mscorlib.dll!System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Action action, bool allowInlining, ref System.Threading.Tasks.Task currentTask)
mscorlib.dll!System.Threading.Tasks.Task.FinishContinuations()
mscorlib.dll!System.Threading.Tasks.Task.FinishStageThree()
mscorlib.dll!System.Threading.Tasks.Task<System.__Canon>.TrySetResult(System.__Canon result)
mscorlib.dll!System.Threading.Tasks.TaskCompletionSource<System.__Canon>.TrySetResult(System.__Canon result)
Microsoft.EntityFrameworkCore.Relational.dll!System.Threading.Tasks.TaskExtensions.Cast.AnonymousMethod__0(System.Threading.Tasks.Task t)
mscorlib.dll!System.Threading.Tasks.ContinuationTaskFromResultTask.InnerInvoke()
mscorlib.dll!System.Threading.Tasks.Task.Execute()
mscorlib.dll!System.Threading.Tasks.Task.ExecutionContextCallback(object obj)
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Threading.Tasks.Task.ExecuteWithThreadLocal(ref System.Threading.Tasks.Task currentTaskSlot)
mscorlib.dll!System.Threading.Tasks.Task.ExecuteEntry(bool bPreventDoubleExecution)
mscorlib.dll!System.Threading.Tasks.ThreadPoolTaskScheduler.TryExecuteTaskInline(System.Threading.Tasks.Task task, bool taskWasPreviouslyQueued)
mscorlib.dll!System.Threading.Tasks.TaskScheduler.TryRunInline(System.Threading.Tasks.Task task, bool taskWasPreviouslyQueued)
mscorlib.dll!System.Threading.Tasks.TaskContinuation.InlineIfPossibleOrElseQueue(System.Threading.Tasks.Task task, bool needsProtection)
mscorlib.dll!System.Threading.Tasks.StandardTaskContinuation.Run(System.Threading.Tasks.Task completedTask, bool bCanInlineContinuationTask)
mscorlib.dll!System.Threading.Tasks.Task.FinishContinuations()
mscorlib.dll!System.Threading.Tasks.Task.FinishStageThree()
mscorlib.dll!System.Threading.Tasks.Task<System.__Canon>.TrySetResult(System.__Canon result)
mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder.SetResult(object result)
NG.Data.Spanner.EF.dll!NG.Data.Spanner.EF.Storage.Internal.SpannerRelationalCommand.ExecuteAsync(Microsoft.EntityFrameworkCore.Storage.IRelationalConnection connection, string executeMethod, System.Collections.Generic.IReadOnlyDictionary<string, object> parameterValues, bool closeConnection, System.Threading.CancellationToken cancellationToken) Line 41
[Resuming Async Method]
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.InvokeMoveNext(object stateMachine)
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.OutputAsyncCausalityEvents.AnonymousMethod__0()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()
mscorlib.dll!System.Runtime.CompilerServices.TaskAwaiter.OutputWaitEtwEvents.AnonymousMethod__0()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()
mscorlib.dll!System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Action action, bool allowInlining, ref System.Threading.Tasks.Task currentTask)
mscorlib.dll!System.Threading.Tasks.Task.FinishContinuations()
mscorlib.dll!System.Threading.Tasks.Task.FinishStageThree()
mscorlib.dll!System.Threading.Tasks.Task<System.__Canon>.TrySetResult(System.__Canon result)
mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder.SetResult(object result)
NG.Data.Spanner.EF.dll!NG.Data.Spanner.EF.Storage.Internal.SpannerRelationalCommand.ExecuteAsync(NG.Data.Spanner.EF.Storage.Internal.IOBehavior ioBehavior, Microsoft.EntityFrameworkCore.Storage.IRelationalConnection connection, string executeMethod, System.Collections.Generic.IReadOnlyDictionary<string, object> parameterValues, bool closeConnection, System.Threading.CancellationToken cancellationToken) Line 128
[Resuming Async Method]
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.InvokeMoveNext(object stateMachine)
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.OutputAsyncCausalityEvents.AnonymousMethod__0()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()
mscorlib.dll!System.Runtime.CompilerServices.TaskAwaiter.OutputWaitEtwEvents.AnonymousMethod__0()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()
mscorlib.dll!System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Action action, bool allowInlining, ref System.Threading.Tasks.Task currentTask)
mscorlib.dll!System.Threading.Tasks.Task.FinishContinuations()
mscorlib.dll!System.Threading.Tasks.Task.FinishStageThree()
mscorlib.dll!System.Threading.Tasks.Task<System.__Canon>.TrySetResult(System.__Canon result)
mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder<System.Data.Common.DbDataReader>.SetResult(System.Data.Common.DbDataReader result)
NG.Data.Spanner.dll!NG.Data.Spanner.SpannerCommand.ExecuteDbDataReaderAsync(System.Data.CommandBehavior behavior, System.Threading.CancellationToken cancellationToken) Line 67
[Resuming Async Method]
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.InvokeMoveNext(object stateMachine)
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.OutputAsyncCausalityEvents.AnonymousMethod__0()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()
mscorlib.dll!System.Runtime.CompilerServices.TaskAwaiter.OutputWaitEtwEvents.AnonymousMethod__0()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()
mscorlib.dll!System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Action action, bool allowInlining, ref System.Threading.Tasks.Task currentTask)
mscorlib.dll!System.Threading.Tasks.Task.FinishContinuations()
mscorlib.dll!System.Threading.Tasks.Task.FinishStageThree()
mscorlib.dll!System.Threading.Tasks.Task<System.__Canon>.TrySetResult(System.__Canon result)
mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder<Google.Cloud.Spanner.V1.ResultSet>.SetResult(Google.Cloud.Spanner.V1.ResultSet result)
NG.Data.Spanner.dll!NG.Data.Spanner.SpannerConnection.RunQuery(string commandText) Line 118
[Resuming Async Method]
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.InvokeMoveNext(object stateMachine)
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.OutputAsyncCausalityEvents.AnonymousMethod__0()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()
mscorlib.dll!System.Runtime.CompilerServices.TaskAwaiter.OutputWaitEtwEvents.AnonymousMethod__0()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()
mscorlib.dll!System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Action action, bool allowInlining, ref System.Threading.Tasks.Task currentTask)
mscorlib.dll!System.Threading.Tasks.Task.FinishContinuations()
mscorlib.dll!System.Threading.Tasks.Task.FinishStageThree()
mscorlib.dll!System.Threading.Tasks.Task<System.__Canon>.TrySetResult(System.__Canon result)
mscorlib.dll!System.Runtime.CompilerServices.AsyncTaskMethodBuilder<Google.Cloud.Spanner.V1.ResultSet>.SetResult(Google.Cloud.Spanner.V1.ResultSet result)
Google.Api.Gax.Grpc.dll!Google.Api.Gax.Grpc.ApiCallRetryExtensions.WithRetry.AnonymousMethod__0(Google.Cloud.Spanner.V1.ExecuteSqlRequest request, Google.Api.Gax.Grpc.CallSettings callSettings)
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.InvokeMoveNext(object stateMachine)
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.OutputAsyncCausalityEvents.AnonymousMethod__0()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()
mscorlib.dll!System.Runtime.CompilerServices.TaskAwaiter.OutputWaitEtwEvents.AnonymousMethod__0()
mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.ContinuationWrapper.Invoke()
mscorlib.dll!System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(System.Action action, bool allowInlining, ref System.Threading.Tasks.Task currentTask)
mscorlib.dll!System.Threading.Tasks.Task.FinishContinuations()
mscorlib.dll!System.Threading.Tasks.Task.FinishStageThree()
mscorlib.dll!System.Threading.Tasks.Task<System.__Canon>.TrySetResult(System.__Canon result)
mscorlib.dll!System.Threading.Tasks.TaskCompletionSource<System.__Canon>.TrySetResult(System.__Canon result)
mscorlib.dll!System.Threading.Tasks.TaskCompletionSource<System.__Canon>.SetResult(System.__Canon result)
Grpc.Core.dll!Grpc.Core.Internal.AsyncCall<Google.Cloud.Spanner.V1.ExecuteSqlRequest, Google.Cloud.Spanner.V1.ResultSet>.HandleUnaryResponse(bool success, Grpc.Core.Internal.ClientSideStatus receivedStatus, byte[] receivedMessage, Grpc.Core.Metadata responseHeaders)
Grpc.Core.dll!Grpc.Core.Internal.CallSafeHandle.StartUnary.AnonymousMethod__0(bool success, Grpc.Core.Internal.BatchContextSafeHandle context)
Grpc.Core.dll!Grpc.Core.Internal.CompletionRegistry.HandleBatchCompletion(bool success, Grpc.Core.Internal.BatchContextSafeHandle ctx, Grpc.Core.Internal.BatchCompletionDelegate callback)
Grpc.Core.dll!Grpc.Core.Internal.CompletionRegistry.RegisterBatchCompletion.AnonymousMethod__0(bool success)
Grpc.Core.dll!Grpc.Core.Internal.GrpcThreadPool.RunHandlerLoop(Grpc.Core.Internal.CompletionQueueSafeHandle cq, Grpc.Core.Profiling.IProfiler optionalProfiler)
Grpc.Core.dll!Grpc.Core.Internal.GrpcThreadPool.CreateAndStartThread.AnonymousMethod__0()
mscorlib.dll!System.Threading.ThreadHelper.ThreadStart_Context(object state)
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state)
mscorlib.dll!System.Threading.ThreadHelper.ThreadStart()

So after a very long debugging I found the problem and did some work around to solve it. I'll try to explain:
I'm building EF Core provider to the Google Spanner db. For this I'm using Google Spanner DotNet API - although it is not yet public and very unmature API (actually it is just auto-generated code).
This API uses the gRPC API and what I saw is that on the first async call with this API, the gRPC thread (The gRPC has its own thread pool implementation) is used and will be used for the next execution calls - since the continuations will run only on this thread from the gRPC thread pool.
EFCore calls the ToEnumerable for the "Games" list which use the System.Interactive.Async lib. On the the ToEnumerable implementation it actually calls "Result" which blocks the execution thread and waits for the result. Because the gRPC thread is used and wait for the execution to be finished we have a deadlock...
My workaround was to use the following code:
GrpcEnvironment.SetCompletionQueueCount(1);
This way the continuations is allowed to run on other threads from the gRPC thread pool.
This is only a workaround and should be used. However it help solving the issue in the meantime...
The real solution should probably be in the EFCore usage of the System.Interactive.Async lib, in regarding to the ToEnumerable... (It should be pure async).
Edit:
If it might be relevant to anyone:
Just released an EF Core provider for the Google Spanner db:
https://github.com/NoGame/NG.Data.Spanner

Your issue is that you are attempting to materialize Games synchronously and the projected object asynchronously. Note the following:
.Select(p => new {
PlayerId = p.PlayerId,
Games = p.Games.ToList() // sync over async is blocking
}).ToListAsync();
What you would expect to work (in regular EF for instance) is:
.Select(p => new {
PlayerId = p.PlayerId,
Games = p.Games // let the provider handle the enumeration materialization
}).ToListAsync();
But according to your comments that doesn't actually return the games on the anonymous projected object. The issue, it seems then, is that EF Core seems to not let you get away with naive assignment (you should update the question to indicate that). I wonder if this isn't related to how .Include() works in EF Core. I am not familiar enough with the core version of EF to offer much help beyond telling you the "cause," but essentially the issue is that you are waiting to get an enumerator from a source that is waiting to materialize based on that enumeration.

Hangfire disposes of autofac dependencies which are defined as SingleInstance

Using hangfire 1.3.4 with hangfire.autofac 1.0.0 in an ASP.NET application.
I have the following scenario:
class MyType : IDisposable
{
public void Start()
{
RecurringJob.AddOrUpdate("background-update", () => ProcessData(), Cron.Daily());
RecurringJob.Trigger("background-update");
}
public void ProcessData(){...}
public void Dispose(){...}
}
...
var builder = new ContainerBuilder();
builder.RegisterType<MyType>().SingleInstance();
var cont = builder.Build();
app.UseHangfire(config =>
{
var options = new SqlServerStorageOptions();
config.UseAutofacActivator(cont);
config.UseSqlServerStorage("MyServer", options);
config.UseServer();
});
...
var c = cont.Resolve<MyType>();
c.Start();
What I see is that Autofac executes the recurrent job as requested but then disposes of instance of MyType, which obviously causes failures on subsequent calls for it, since it's defined as a singleton, and should be disposed of by Autofac upon shutdown.
Am I missing something or is this a bug?
Here's the callstack:
MyDll.dll!MyType.Dispose() Line 316 C#
Hangfire.Core.dll!Hangfire.Common.Job.Dispose(object instance) Unknown
Hangfire.Core.dll!Hangfire.Common.Job.Perform(Hangfire.JobActivator activator, Hangfire.IJobCancellationToken cancellationToken) Unknown
Hangfire.Core.dll!Hangfire.Server.JobPerformanceProcess.PerformJobWithFilters.AnonymousMethod__6() Unknown
Hangfire.Core.dll!Hangfire.Server.JobPerformanceProcess.InvokePerformFilter(Hangfire.Server.IServerFilter filter, Hangfire.Server.PerformingContext preContext, System.Func continuation) Unknown
Hangfire.Core.dll!Hangfire.Server.JobPerformanceProcess.PerformJobWithFilters.AnonymousMethod__8() Unknown
Hangfire.Core.dll!Hangfire.Server.JobPerformanceProcess.InvokePerformFilter(Hangfire.Server.IServerFilter filter, Hangfire.Server.PerformingContext preContext, System.Func continuation) Unknown
Hangfire.Core.dll!Hangfire.Server.JobPerformanceProcess.PerformJobWithFilters.AnonymousMethod__8() Unknown
Hangfire.Core.dll!Hangfire.Server.JobPerformanceProcess.PerformJobWithFilters(Hangfire.Server.PerformContext context, Hangfire.Server.IJobPerformer performer, System.Collections.Generic.IEnumerable filters) Unknown
Hangfire.Core.dll!Hangfire.Server.JobPerformanceProcess.Run(Hangfire.Server.PerformContext context, Hangfire.Server.IJobPerformer performer) Unknown
Hangfire.Core.dll!Hangfire.Server.Worker.ProcessJob(string jobId, Hangfire.Storage.IStorageConnection connection, Hangfire.Server.IJobPerformanceProcess process, System.Threading.CancellationToken shutdownToken) Unknown
Hangfire.Core.dll!Hangfire.Server.Worker.Execute(System.Threading.CancellationToken cancellationToken) Unknown
Hangfire.Core.dll!Hangfire.Server.AutomaticRetryServerComponentWrapper.ExecuteWithAutomaticRetry(System.Threading.CancellationToken cancellationToken) Unknown
Hangfire.Core.dll!Hangfire.Server.AutomaticRetryServerComponentWrapper.Execute(System.Threading.CancellationToken cancellationToken) Unknown
Hangfire.Core.dll!Hangfire.Server.ServerSupervisor.ExecuteComponent() Unknown
Hangfire.Core.dll!Hangfire.Server.ServerSupervisor.RunComponent() Unknown
mscorlib.dll!System.Threading.ThreadHelper.ThreadStart_Context(object state) Unknown
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Unknown
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) Unknown
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) Unknown
mscorlib.dll!System.Threading.ThreadHelper.ThreadStart() Unknown
[Native to Managed Transition]

This is fixed in latest (beta) releases of hangfire, see https://github.com/HangfireIO/Hangfire/issues/329 for details.

Unhandled Exception: System.ComponentModel.Win32Exception: The operation completed successfully

Whenever I try to run this code: (code shortened to keep the post short)
// Generate a random capital letter
char key = (char)(_random.Next(24) + 65);
// 50% make it lowercase
if (_random.Next(2) == 0)
{
key = Char.ToLower(key);
}
SendKeys.SendWait(key.ToString());
I get this error:
Unhandled Exception: System.ComponentModel.Win32Exception: The operation completed successfully
at System.Windows.Forms.SendKeys.SendInput(Byte[] oldKeyboardState, Queue previousEvents)
at System.Windows.Forms.SendKeys.Send(String keys, Control control, Boolean wait)
at System.Windows.Forms.SendKeys.SendWait(String keys)
at DrunkPC.Program.DrunkKeyboardThread() in c:\Users\SPC\Documents\Visual Studio 2013\Projects\DrunkPC\Program.cs:line 91
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
Line 91 is:
SendKeys.SendWait(key.toString());

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