System.Net.Quic is leaking UnobservedTaskExceptions #80111

MihaZupan · 2023-01-03T07:45:36Z

I have a console app with HttpClient that continuously sends requests to a localhost Kestrel instance.
If I randomly shut down and restart the server while HttpClient is making requests, I can see sporadic UnobservedTaskExceptions coming from System.Net.Quic.

System.AggregateException: A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread. (Operation aborted.)
 ---> System.Net.Quic.QuicException: Operation aborted.
   at System.Net.Quic.ResettableValueTaskSource.TryComplete(Exception exception, Boolean final) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\Internal\ResettableValueTaskSource.cs:line 157
   at System.Net.Quic.ResettableValueTaskSource.TrySetException(Exception exception, Boolean final) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\Internal\ResettableValueTaskSource.cs:line 221
   at System.Net.Quic.QuicStream.HandleEventShutdownComplete(_SHUTDOWN_COMPLETE_e__Struct& data) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicStream.cs:line 634
   at System.Net.Quic.QuicStream.HandleStreamEvent(QUIC_STREAM_EVENT& streamEvent) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicStream.cs:line 671
   at System.Net.Quic.QuicStream.NativeCallback(QUIC_HANDLE* connection, Void* context, QUIC_STREAM_EVENT* streamEvent) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicStream.cs:line 695
--- End of stack trace from previous location ---
   at System.Net.Quic.ResettableValueTaskSource.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\Internal\ResettableValueTaskSource.cs:line 235
   at System.Net.Quic.QuicStream.ReadAsync(Memory`1 buffer, CancellationToken cancellationToken) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicStream.cs:line 306
   at System.Net.Http.Http3Connection.<>c__DisplayClass45_0.<<ProcessServerControlStreamAsync>g__ReadFrameEnvelopeAsync|0>d.MoveNext() in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Http\src\System\Net\Http\SocketsHttpHandler\Http3Connection.cs:line 679
--- End of stack trace from previous location ---
   at System.Net.Http.Http3Connection.ProcessServerControlStreamAsync(QuicStream stream, ArrayBuffer buffer) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Http\src\System\Net\Http\SocketsHttpHandler\Http3Connection.cs:line 624
   at System.Net.Http.Http3Connection.ProcessServerStreamAsync(QuicStream stream) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Http\src\System\Net\Http\SocketsHttpHandler\Http3Connection.cs:line 520
   at System.Net.Http.Http3Connection.ProcessServerStreamAsync(QuicStream stream) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Http\src\System\Net\Http\SocketsHttpHandler\Http3Connection.cs:line 575
   --- End of inner exception stack trace ---

System.AggregateException: A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread. (Operation aborted.)
 ---> System.Net.Quic.QuicException: Operation aborted.
   at System.Net.Quic.QuicConnection.HandleEventShutdownComplete() in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 492
   at System.Net.Quic.QuicConnection.HandleConnectionEvent(QUIC_CONNECTION_EVENT& connectionEvent) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 571
   at System.Net.Quic.QuicConnection.NativeCallback(QUIC_HANDLE* connection, Void* context, QUIC_CONNECTION_EVENT* connectionEvent) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 598
--- End of stack trace from previous location ---
   at System.Net.Quic.QuicConnection.AcceptInboundStreamAsync(CancellationToken cancellationToken) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 402
   at System.Net.Http.Http3Connection.AcceptStreamsAsync() in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Http\src\System\Net\Http\SocketsHttpHandler\Http3Connection.cs:line 438
   --- End of inner exception stack trace ---

System.AggregateException: A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread. (The server is currently unreachable.)
 ---> System.Net.Quic.QuicException: The server is currently unreachable.
   at System.Net.Quic.QuicConnection.HandleEventShutdownInitiatedByTransport(_SHUTDOWN_INITIATED_BY_TRANSPORT_e__Struct& data) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 470
   at System.Net.Quic.QuicConnection.HandleConnectionEvent(QUIC_CONNECTION_EVENT& connectionEvent) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 569
   at System.Net.Quic.QuicConnection.NativeCallback(QUIC_HANDLE* connection, Void* context, QUIC_CONNECTION_EVENT* connectionEvent) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 598
--- End of stack trace from previous location ---
   at System.Net.Quic.ValueTaskSource.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\Internal\ValueTaskSource.cs:line 176
   at System.Net.Quic.QuicConnection.FinishConnectAsync(QuicClientConnectionOptions options, CancellationToken cancellationToken) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 312
   at System.Net.Quic.QuicConnection.ConnectAsync(QuicClientConnectionOptions options, CancellationToken cancellationToken) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 68
   at System.Net.Quic.QuicConnection.ConnectAsync(QuicClientConnectionOptions options, CancellationToken cancellationToken) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 73
   at System.Net.Http.ConnectHelper.ConnectQuicAsync(HttpRequestMessage request, DnsEndPoint endPoint, TimeSpan idleTimeout, SslClientAuthenticationOptions clientAuthenticationOptions, CancellationToken cancellationToken) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Http\src\System\Net\Http\SocketsHttpHandler\ConnectHelper.cs:line 120
   --- End of inner exception stack trace ---

The text was updated successfully, but these errors were encountered:

ghost · 2023-01-03T07:45:43Z

Tagging subscribers to this area: @dotnet/ncl
See info in area-owners.md if you want to be subscribed.

Issue Details

I have a console app with HttpClient that continuously sends requests to a localhost Kestrel instance.
If I randomly shut down and restart the server while HttpClient is making requests, I can see sporadic UnobservedTaskExceptions coming from System.Net.Quic.

System.AggregateException: A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread. (Operation aborted.)
 ---> System.Net.Quic.QuicException: Operation aborted.
   at System.Net.Quic.ResettableValueTaskSource.TryComplete(Exception exception, Boolean final) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\Internal\ResettableValueTaskSource.cs:line 157
   at System.Net.Quic.ResettableValueTaskSource.TrySetException(Exception exception, Boolean final) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\Internal\ResettableValueTaskSource.cs:line 221
   at System.Net.Quic.QuicStream.HandleEventShutdownComplete(_SHUTDOWN_COMPLETE_e__Struct& data) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicStream.cs:line 634
   at System.Net.Quic.QuicStream.HandleStreamEvent(QUIC_STREAM_EVENT& streamEvent) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicStream.cs:line 671
   at System.Net.Quic.QuicStream.NativeCallback(QUIC_HANDLE* connection, Void* context, QUIC_STREAM_EVENT* streamEvent) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicStream.cs:line 695
--- End of stack trace from previous location ---
   at System.Net.Quic.ResettableValueTaskSource.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\Internal\ResettableValueTaskSource.cs:line 235
   at System.Net.Quic.QuicStream.ReadAsync(Memory`1 buffer, CancellationToken cancellationToken) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicStream.cs:line 306
   at System.Net.Http.Http3Connection.<>c__DisplayClass45_0.<<ProcessServerControlStreamAsync>g__ReadFrameEnvelopeAsync|0>d.MoveNext() in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Http\src\System\Net\Http\SocketsHttpHandler\Http3Connection.cs:line 679
--- End of stack trace from previous location ---
   at System.Net.Http.Http3Connection.ProcessServerControlStreamAsync(QuicStream stream, ArrayBuffer buffer) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Http\src\System\Net\Http\SocketsHttpHandler\Http3Connection.cs:line 624
   at System.Net.Http.Http3Connection.ProcessServerStreamAsync(QuicStream stream) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Http\src\System\Net\Http\SocketsHttpHandler\Http3Connection.cs:line 520
   at System.Net.Http.Http3Connection.ProcessServerStreamAsync(QuicStream stream) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Http\src\System\Net\Http\SocketsHttpHandler\Http3Connection.cs:line 575
   --- End of inner exception stack trace ---

System.AggregateException: A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread. (Operation aborted.)
 ---> System.Net.Quic.QuicException: Operation aborted.
   at System.Net.Quic.QuicConnection.HandleEventShutdownComplete() in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 492
   at System.Net.Quic.QuicConnection.HandleConnectionEvent(QUIC_CONNECTION_EVENT& connectionEvent) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 571
   at System.Net.Quic.QuicConnection.NativeCallback(QUIC_HANDLE* connection, Void* context, QUIC_CONNECTION_EVENT* connectionEvent) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 598
--- End of stack trace from previous location ---
   at System.Net.Quic.QuicConnection.AcceptInboundStreamAsync(CancellationToken cancellationToken) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 402
   at System.Net.Http.Http3Connection.AcceptStreamsAsync() in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Http\src\System\Net\Http\SocketsHttpHandler\Http3Connection.cs:line 438
   --- End of inner exception stack trace ---

System.AggregateException: A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread. (The server is currently unreachable.)
 ---> System.Net.Quic.QuicException: The server is currently unreachable.
   at System.Net.Quic.QuicConnection.HandleEventShutdownInitiatedByTransport(_SHUTDOWN_INITIATED_BY_TRANSPORT_e__Struct& data) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 470
   at System.Net.Quic.QuicConnection.HandleConnectionEvent(QUIC_CONNECTION_EVENT& connectionEvent) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 569
   at System.Net.Quic.QuicConnection.NativeCallback(QUIC_HANDLE* connection, Void* context, QUIC_CONNECTION_EVENT* connectionEvent) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 598
--- End of stack trace from previous location ---
   at System.Net.Quic.ValueTaskSource.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\Internal\ValueTaskSource.cs:line 176
   at System.Net.Quic.QuicConnection.FinishConnectAsync(QuicClientConnectionOptions options, CancellationToken cancellationToken) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 312
   at System.Net.Quic.QuicConnection.ConnectAsync(QuicClientConnectionOptions options, CancellationToken cancellationToken) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 68
   at System.Net.Quic.QuicConnection.ConnectAsync(QuicClientConnectionOptions options, CancellationToken cancellationToken) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 73
   at System.Net.Http.ConnectHelper.ConnectQuicAsync(HttpRequestMessage request, DnsEndPoint endPoint, TimeSpan idleTimeout, SslClientAuthenticationOptions clientAuthenticationOptions, CancellationToken cancellationToken) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Http\src\System\Net\Http\SocketsHttpHandler\ConnectHelper.cs:line 120
   --- End of inner exception stack trace ---

Author:	MihaZupan
Assignees:	-
Labels:	`bug`, `area-System.Net.Quic`
Milestone:	-

JustArchi · 2023-01-12T01:27:31Z

I can confirm this with entirely different project.

2023-01-12 02:50:08|ArchiSteamFarm-2292|FATAL|ASF|OnUnobservedTaskException() System.Net.Quic.QuicException: Reading has been aborted on the stream.
   at System.Net.Quic.ResettableValueTaskSource.TryComplete(Exception, Boolean)
   at System.Net.Quic.ResettableValueTaskSource.TrySetException(Exception, Boolean )
   at System.Net.Quic.QuicStream.Abort(QuicAbortDirection, Int64)
   at System.Net.Http.Http3RequestStream.AbortStream()
   at System.Net.Http.Http3RequestStream.Dispose()
   at System.Net.Http.Http3RequestStream.Http3ReadStream.Dispose(Boolean)
   at System.IO.Stream.Close()
   at System.IO.Compression.BrotliStream.Dispose(Boolean)
   at System.IO.Stream.Close()
   at System.IO.StreamReader.Dispose(Boolean)
   at System.IO.StreamReader.Close()
   at Newtonsoft.Json.JsonTextReader.Close()
   at Newtonsoft.Json.JsonReader.Dispose(Boolean disposing)
   at Newtonsoft.Json.JsonReader.System.IAsyncDisposable.DisposeAsync()
   at System.Runtime.CompilerServices.ConfiguredAsyncDisposable.DisposeAsync()
   at ArchiSteamFarm.Web.WebBrowser.UrlGetToJsonObject[T](Uri request, IReadOnlyCollection`1 headers, Uri referer, ERequestOptions requestOptions, Byte maxTries, Int32 rateLimitingDelay)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.ExecutionContextCallback(Object)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext, ContextCallback, Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext(Thread)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext()
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(Object)
   at System.Threading.Tasks.Task`1.TrySetResult(TResult)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.SetResult(TResult)
   at ArchiSteamFarm.Web.WebBrowser.UrlGetToStream(Uri request, IReadOnlyCollection`1 headers, Uri referer, ERequestOptions requestOptions, Byte maxTries, Int32 rateLimitingDelay)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.ExecutionContextCallback(Object)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext, ContextCallback, Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext(Thread)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext()
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(Object)
   at System.Threading.Tasks.Task`1.TrySetResult(TResult)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.SetResult(TResult)
   at ArchiSteamFarm.Web.WebBrowser.InternalGet(Uri request, IReadOnlyCollection`1 headers, Uri referer, ERequestOptions requestOptions, HttpCompletionOption httpCompletionOption)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.ExecutionContextCallback(Object)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext, ContextCallback, Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext(Thread)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext()
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(Object)
   at System.Threading.Tasks.Task`1.TrySetResult(TResult)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.SetResult(TResult)
   at ArchiSteamFarm.Web.WebBrowser.InternalRequest[T](Uri request, HttpMethod httpMethod, IReadOnlyCollection`1 headers, T data, Uri referer, ERequestOptions requestOptions, HttpCompletionOption httpCompletionOption, Byte maxRedirections)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.ExecutionContextCallback(Object)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext, ContextCallback, Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext(Thread)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext()
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(Object)
   at System.Threading.Tasks.Task`1.TrySetResult(TResult)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.SetResult(TResult)
   at System.Net.Http.HttpClient.<SendAsync>g__Core|83_0(HttpRequestMessage, HttpCompletionOption, CancellationTokenSource, Boolean, CancellationTokenSource, CancellationToken)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.ExecutionContextCallback(Object)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext, ContextCallback, Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext(Thread)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext()
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(Object)
   at System.Threading.Tasks.Task`1.TrySetResult(TResult)
   at System.Runtime.CompilerServices.AsyncValueTaskMethodBuilder`1.SetResult(TResult)
   at System.Net.Http.DecompressionHandler.SendAsync(HttpRequestMessage, Boolean, CancellationToken)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.ExecutionContextCallback(Object)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext, ContextCallback, Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext(Thread)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext()
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(Object)
   at System.Threading.Tasks.Task`1.TrySetResult(TResult)
   at System.Runtime.CompilerServices.AsyncValueTaskMethodBuilder`1.SetResult(TResult)
   at System.Net.Http.HttpConnectionPool.SendWithVersionDetectionAndRetryAsync(HttpRequestMessage, Boolean, Boolean, CancellationToken)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.ExecutionContextCallback(Object)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext, ContextCallback, Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext(Thread)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext()
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(Object)
   at System.Threading.Tasks.Task`1.TrySetResult(TResult)
   at System.Runtime.CompilerServices.AsyncValueTaskMethodBuilder`1.SetResult(TResult)
   at System.Net.Http.HttpConnectionPool.TrySendUsingHttp3Async(HttpRequestMessage, CancellationToken)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.ExecutionContextCallback(Object)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext, ContextCallback, Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext(Thread)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext()
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(Object)
   at System.Threading.Tasks.Task`1.TrySetResult(TResult)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.SetResult(TResult)
   at System.Net.Http.Http3Connection.SendAsync(HttpRequestMessage, Int64, CancellationToken)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.ExecutionContextCallback(Object)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext, ContextCallback, Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext(Thread)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext()
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(Object)
   at System.Threading.Tasks.Task`1.TrySetResult(TResult)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.SetResult(TResult)
   at System.Net.Http.Http3RequestStream.SendAsync(CancellationToken)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.ExecutionContextCallback(Object)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext, ContextCallback, Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext(Thread)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext()
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder.SetResult()
   at System.Net.Http.Http3RequestStream.ReadResponseAsync(CancellationToken)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.ExecutionContextCallback(Object)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext, ContextCallback, Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext(Thread)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext()
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(Object)
   at System.Threading.Tasks.Task`1.TrySetResult(TResult)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.SetExistingTaskResult(Task`1, TResult)
   at System.Runtime.CompilerServices.AsyncValueTaskMethodBuilder`1.SetResult(TResult)
   at System.Net.Http.Http3RequestStream.ReadFrameEnvelopeAsync(CancellationToken)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.ExecutionContextCallback(Object)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext, ContextCallback, Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext(Thread)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext()
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(IAsyncStateMachineBox, Boolean)
   at System.Threading.Tasks.Task.RunContinuations(Object)
   at System.Threading.Tasks.Task`1.TrySetResult(TResult)
   at System.Runtime.CompilerServices.AsyncValueTaskMethodBuilder`1.SetResult(TResult)
   at System.Net.Quic.QuicStream.ReadAsync(Memory`1, CancellationToken )
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.ExecutionContextCallback(Object)
   at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread, ExecutionContext, ContextCallback, Object)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext(Thread)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.ExecuteFromThreadPool(Thread)
   at System.Threading.ThreadPoolWorkQueue.Dispatch()
   at System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart()
   at System.Threading.Thread.StartCallback()
--- End of stack trace from previous location ---

2023-01-12 03:05:01|ArchiSteamFarm-2292|FATAL|ASF|OnUnobservedTaskException() System.Net.Quic.QuicException: The connection timed out from inactivity.
   at System.Net.Quic.QuicConnection.HandleEventShutdownInitiatedByTransport(_SHUTDOWN_INITIATED_BY_TRANSPORT_e__Struct&)
   at System.Net.Quic.QuicConnection.HandleConnectionEvent(QUIC_CONNECTION_EVENT&)
   at System.Net.Quic.QuicConnection.NativeCallback(QUIC_HANDLE*, Void*, QUIC_CONNECTION_EVENT*)
--- End of stack trace from previous location ---
   at System.Net.Quic.QuicConnection.AcceptInboundStreamAsync(CancellationToken )
   at System.Net.Http.Http3Connection.AcceptStreamsAsync()
2023-01-12 03:05:01|ArchiSteamFarm-2292|FATAL|ASF|OnUnobservedTaskException() System.Net.Quic.QuicException: The connection timed out from inactivity.
   at System.Net.Quic.ResettableValueTaskSource.TryComplete(Exception, Boolean)
   at System.Net.Quic.ResettableValueTaskSource.TrySetException(Exception, Boolean )
   at System.Net.Quic.QuicStream.HandleEventShutdownComplete(_SHUTDOWN_COMPLETE_e__Struct&)
   at System.Net.Quic.QuicStream.HandleStreamEvent(QUIC_STREAM_EVENT&)
   at System.Net.Quic.QuicStream.NativeCallback(QUIC_HANDLE*, Void*, QUIC_STREAM_EVENT*)
--- End of stack trace from previous location ---
   at System.Net.Quic.ResettableValueTaskSource.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16)
   at System.Net.Quic.QuicStream.ReadAsync(Memory`1, CancellationToken )
   at System.IO.Stream.<CopyToAsync>g__Core|27_0(Stream source, Stream destination, Int32 bufferSize, CancellationToken cancellationToken)
   at System.Net.Http.Http3Connection.ProcessServerStreamAsync(QuicStream)
   at System.Net.Http.Http3Connection.ProcessServerStreamAsync(QuicStream)
2023-01-12 03:05:01|ArchiSteamFarm-2292|FATAL|ASF|OnUnobservedTaskException() System.Net.Quic.QuicException: The connection timed out from inactivity.
   at System.Net.Quic.ResettableValueTaskSource.TryComplete(Exception, Boolean)
   at System.Net.Quic.ResettableValueTaskSource.TrySetException(Exception, Boolean )
   at System.Net.Quic.QuicStream.HandleEventShutdownComplete(_SHUTDOWN_COMPLETE_e__Struct&)
   at System.Net.Quic.QuicStream.HandleStreamEvent(QUIC_STREAM_EVENT&)
   at System.Net.Quic.QuicStream.NativeCallback(QUIC_HANDLE*, Void*, QUIC_STREAM_EVENT*)
--- End of stack trace from previous location ---
   at System.Net.Quic.ResettableValueTaskSource.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16)
   at System.Net.Quic.QuicStream.ReadAsync(Memory`1, CancellationToken )
   at System.IO.Stream.<CopyToAsync>g__Core|27_0(Stream source, Stream destination, Int32 bufferSize, CancellationToken cancellationToken)
   at System.Net.Http.Http3Connection.ProcessServerStreamAsync(QuicStream)
   at System.Net.Http.Http3Connection.ProcessServerStreamAsync(QuicStream)
2023-01-12 03:05:01|ArchiSteamFarm-2292|FATAL|ASF|OnUnobservedTaskException() System.Net.Quic.QuicException: The connection timed out from inactivity.
   at System.Net.Quic.ResettableValueTaskSource.TryComplete(Exception, Boolean)
   at System.Net.Quic.ResettableValueTaskSource.TrySetException(Exception, Boolean )
   at System.Net.Quic.QuicStream.HandleEventShutdownComplete(_SHUTDOWN_COMPLETE_e__Struct&)
   at System.Net.Quic.QuicStream.HandleStreamEvent(QUIC_STREAM_EVENT&)
   at System.Net.Quic.QuicStream.NativeCallback(QUIC_HANDLE*, Void*, QUIC_STREAM_EVENT*)
--- End of stack trace from previous location ---
   at System.Net.Quic.ResettableValueTaskSource.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16)
   at System.Net.Quic.QuicStream.ReadAsync(Memory`1, CancellationToken )
   at System.Net.Http.Http3Connection.<>c__DisplayClass45_0.<<ProcessServerControlStreamAsync>g__ReadFrameEnvelopeAsync|0>d.MoveNext()
--- End of stack trace from previous location ---
   at System.Net.Http.Http3Connection.ProcessServerControlStreamAsync(QuicStream, ArrayBuffer)
   at System.Net.Http.Http3Connection.ProcessServerStreamAsync(QuicStream)
   at System.Net.Http.Http3Connection.ProcessServerStreamAsync(QuicStream)

The application seems to work fine however.

See dotnet/runtime#80111

* Ignore QUIC exceptions See dotnet/runtime#80111 * Update madness * No i jaki jest twój problem ja się pytam

ManickaP · 2023-01-26T16:47:57Z

Triage: we should fix this in 8.0.

alexrp · 2023-08-26T12:57:27Z

Just wanted to confirm given #80111 (comment), was this moved to 9.0.0 intentionally?

ManickaP · 2023-08-27T08:50:26Z

Yes, it was moved. Unfortunately, we didn't have a chance to look into it. And as this doesn't affect application behavior, it got lower priority. It's annoying, but not detrimental.

liveans · 2024-03-19T08:41:57Z

Looks like this is already fixed by some changes, can't repro it on main.
@MihaZupan can you repro this on main?

MihaZupan · 2024-03-19T11:48:11Z

I can consistently repro on 8, but wasn't able to on 9.0 anymore.
Might have been fixed recently, closing. Feel free to reopen if anyone's still seeing it.

MihaZupan · 2024-07-03T13:06:53Z

Doing a simple HTTP test run

.dotnet/dotnet build .\src\libraries\System.Net.Http\tests\FunctionalTests\ /t:Test

while watching for unobserved exceptions

[Fact]
public async Task WatchForUnobserved()
{
    bool seenUnobservedExceptions = false;

    EventHandler<UnobservedTaskExceptionEventArgs> eventHandler = (_, e) =>
    {
        _output.WriteLine(e.Exception.ToString());
        seenUnobservedExceptions = true;
    };

    TaskScheduler.UnobservedTaskException += eventHandler;
    await Task.Delay(10_000);
    TaskScheduler.UnobservedTaskException -= eventHandler;

    Assert.False(seenUnobservedExceptions);
}

I'm still seeing 100s of such unobserved exceptions (mainly from Quic):

System.AggregateException: A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread. (Cannot access a disposed object.
Object name: 'System.Net.Quic.QuicConnection'.)
---> System.ObjectDisposedException: Cannot access a disposed object.
Object name: 'System.Net.Quic.QuicConnection'.
 at System.Net.Quic.QuicConnection.HandleEventShutdownComplete() in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 652
 at System.Net.Quic.QuicConnection.HandleConnectionEvent(QUIC_CONNECTION_EVENT& connectionEvent) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 738
 at System.Net.Quic.QuicConnection.NativeCallback(QUIC_HANDLE* connection, Void* context, QUIC_CONNECTION_EVENT* connectionEvent) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 771
--- End of stack trace from previous location ---

System.AggregateException: A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread. (Operation aborted.)
---> System.Net.Quic.QuicException: Operation aborted.
 at System.Net.Quic.QuicConnection.HandleEventShutdownComplete() in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 652
 at System.Net.Quic.QuicConnection.HandleConnectionEvent(QUIC_CONNECTION_EVENT& connectionEvent) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 738
 at System.Net.Quic.QuicConnection.NativeCallback(QUIC_HANDLE* connection, Void* context, QUIC_CONNECTION_EVENT* connectionEvent) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 771
--- End of stack trace from previous location ---
 at System.Net.Quic.QuicConnection.AcceptInboundStreamAsync(CancellationToken cancellationToken) in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Quic\src\System\Net\Quic\QuicConnection.cs:line 565
 at System.Net.Http.Http3Connection.AcceptStreamsAsync() in C:\MihaZupan\runtime-debug\src\libraries\System.Net.Http\src\System\Net\Http\SocketsHttpHandler\Http3Connection.cs:line 523
 --- End of inner exception stack trace ---

MihaZupan added bug area-System.Net.Quic labels Jan 3, 2023

ghost added the untriaged New issue has not been triaged by the area owner label Jan 3, 2023

wfurt removed the untriaged New issue has not been triaged by the area owner label Jan 3, 2023

wfurt added this to the 8.0.0 milestone Jan 3, 2023

JustArchi added a commit to JustArchiNET/ArchiSteamFarm that referenced this issue Jan 12, 2023

Ignore QUIC exceptions

8b3945c

See dotnet/runtime#80111

JustArchi mentioned this issue Jan 12, 2023

Ignore QUIC exceptions JustArchiNET/ArchiSteamFarm#2800

Merged

JustArchi added a commit to JustArchiNET/ArchiSteamFarm that referenced this issue Jan 13, 2023

Ignore QUIC exceptions (#2800)

0261076

* Ignore QUIC exceptions See dotnet/runtime#80111 * Update madness * No i jaki jest twój problem ja się pytam

ManickaP mentioned this issue Feb 1, 2023

Quic listener disposal throws QuicException #81422

Closed

karelz modified the milestones: 8.0.0, 9.0.0 Jul 18, 2023

lif0 mentioned this issue Nov 23, 2023

Ignore UnobservedTaskException QUIC exceptions getsentry/sentry-dotnet#2894

Merged

This was referenced Nov 24, 2023

chore(deps): update .NET SDK to v3.41.2 getsentry/sentry-unity#1500

Merged

chore(deps): update .NET SDK to v3.41.2 demelev/sentry-unity#53

Open

github-actions bot mentioned this issue Dec 2, 2023

chore(deps): update .NET SDK to v3.41.3 demelev/sentry-unity#58

Open

github-actions bot mentioned this issue Feb 10, 2024

chore(deps): update .NET SDK to v4.1.0 demelev/sentry-unity#92

Open

This was referenced Feb 21, 2024

chore(deps): update .NET SDK to v4.1.2 getsentry/sentry-unity#1568

Closed

chore(deps): update .NET SDK to v4.1.2 demelev/sentry-unity#97

Open

This was referenced Mar 12, 2024

chore(deps): update .NET SDK to v4.2.0 demelev/sentry-unity#106

Open

chore(deps): update .NET SDK to v4.2.1 demelev/sentry-unity#108

Open

MihaZupan closed this as completed Mar 19, 2024

This was referenced Apr 11, 2024

chore(deps): update .NET SDK to v4.3.0 demelev/sentry-unity#123

Open

chore(deps): update .NET SDK to v4.4.0 demelev/sentry-unity#126

Open

github-actions bot locked and limited conversation to collaborators Apr 19, 2024

github-actions bot mentioned this issue May 1, 2024

chore(deps): update .NET SDK to v4.5.0 demelev/sentry-unity#130

Open

This was referenced May 10, 2024

chore(deps): update .NET SDK to v4.6.0 demelev/sentry-unity#137

Open

chore(deps): update .NET SDK to v4.6.2 demelev/sentry-unity#140

Open

github-actions bot mentioned this issue May 28, 2024

chore(deps): update .NET SDK to v4.7.0 demelev/sentry-unity#143

Open

indy-singh mentioned this issue Jun 10, 2024

[BigQuery/Storage Write API] Default GrpcAdapter Memory Leak on Server 2022 googleapis/google-cloud-dotnet#13150

Closed

This was referenced Jun 27, 2024

chore(deps): update .NET SDK to v4.8.0 demelev/sentry-unity#158

Open

chore(deps): update .NET SDK to v4.8.1 demelev/sentry-unity#161

Open

MihaZupan reopened this Jul 3, 2024

dotnet unlocked this conversation Jul 3, 2024

This was referenced Jul 3, 2024

Avoid UnobservedTaskExceptions from HttpConnection.PrepareForReuse #104335

Merged

Avoid unobserved task exceptions in Http tests #104384

Merged

ManickaP self-assigned this Jul 4, 2024

ManickaP mentioned this issue Jul 4, 2024

[QUIC] Fixed some tests leaking unobserved exceptions #104444

Merged

github-actions bot mentioned this issue Jul 12, 2024

chore(deps): update .NET SDK to v4.9.0 demelev/sentry-unity#165

Open

ManickaP mentioned this issue Jul 15, 2024

[QUIC] fix unobserved exceptions #104894

Merged

dotnet-policy-service bot added the in-pr There is an active PR which will close this issue when it is merged label Jul 15, 2024

ManickaP closed this as completed in #104894 Jul 16, 2024

github-actions bot mentioned this issue Aug 15, 2024

chore(deps): update .NET SDK to v4.10.0 demelev/sentry-unity#183

Open

github-actions bot locked and limited conversation to collaborators Aug 15, 2024

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

System.Net.Quic is leaking UnobservedTaskExceptions #80111

System.Net.Quic is leaking UnobservedTaskExceptions #80111

MihaZupan commented Jan 3, 2023

ghost commented Jan 3, 2023

JustArchi commented Jan 12, 2023 •

edited by MihaZupan

Loading

ManickaP commented Jan 26, 2023

alexrp commented Aug 26, 2023

ManickaP commented Aug 27, 2023

liveans commented Mar 19, 2024

MihaZupan commented Mar 19, 2024

MihaZupan commented Jul 3, 2024 •

edited

Loading

System.Net.Quic is leaking UnobservedTaskExceptions #80111

System.Net.Quic is leaking UnobservedTaskExceptions #80111

Comments

MihaZupan commented Jan 3, 2023

ghost commented Jan 3, 2023

JustArchi commented Jan 12, 2023 • edited by MihaZupan Loading

ManickaP commented Jan 26, 2023

alexrp commented Aug 26, 2023

ManickaP commented Aug 27, 2023

liveans commented Mar 19, 2024

MihaZupan commented Mar 19, 2024

MihaZupan commented Jul 3, 2024 • edited Loading

JustArchi commented Jan 12, 2023 •

edited by MihaZupan

Loading

MihaZupan commented Jul 3, 2024 •

edited

Loading