[NET 9] [Blazor/SignalR] `InvalidOperationException`: Trying to set an Activity that is not running

[lvde0]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

Currently migrating my project to .NET 9 and noticed a bunch of InvalidOperationExceptions happening with my server-side blazor application:

Trying to set an Activity that is not running

The seem to happen during SignalR message handling:

System.Diagnostics.DiagnosticSource.dll!System.Diagnostics.Activity.NotifyError(System.Exception exception) C#
System.Diagnostics.DiagnosticSource.dll!System.Diagnostics.Activity.ValidateSetCurrent(System.Diagnostics.Activity activity) C#
System.Diagnostics.DiagnosticSource.dll!System.Diagnostics.Activity.Current.set(System.Diagnostics.Activity value) C#
Microsoft.AspNetCore.SignalR.Core.dll!Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher<Microsoft.AspNetCore.Components.Server.ComponentHub>.Invoke.__ExecuteInvocation|22_0(Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher<Microsoft.AspNetCore.Components.Server.ComponentHub> dispatcher, Microsoft.Extensions.Internal.ObjectMethodExecutor methodExecutor, Microsoft.AspNetCore.Components.Server.ComponentHub hub, object[] arguments, Microsoft.Extensions.DependencyInjection.AsyncServiceScope scope, Microsoft.AspNetCore.SignalR.IHubActivator<Microsoft.AspNetCore.Components.Server.ComponentHub> hubActivator, Microsoft.AspNetCore.SignalR.HubConnectionContext connection, Microsoft.AspNetCore.SignalR.Protocol.HubMethodInvocationMessage hubMethodInvocationMessage, bool isStreamCall) C#
Microsoft.AspNetCore.SignalR.Core.dll!Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher<Microsoft.AspNetCore.Components.Server.ComponentHub>.Invoke(Microsoft.AspNetCore.SignalR.Internal.HubMethodDescriptor descriptor, Microsoft.AspNetCore.SignalR.HubConnectionContext connection, Microsoft.AspNetCore.SignalR.Protocol.HubMethodInvocationMessage hubMethodInvocationMessage, bool isStreamResponse, bool isStreamCall) C#
Microsoft.AspNetCore.SignalR.Core.dll!Microsoft.AspNetCore.SignalR.Internal.ChannelBasedSemaphore.RunTask<(Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher<Microsoft.AspNetCore.Components.Server.ComponentHub>, Microsoft.AspNetCore.SignalR.Internal.HubMethodDescriptor, Microsoft.AspNetCore.SignalR.HubConnectionContext, Microsoft.AspNetCore.SignalR.Protocol.HubMethodInvocationMessage)>(System.Func<(Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher<Microsoft.AspNetCore.Components.Server.ComponentHub>, Microsoft.AspNetCore.SignalR.Internal.HubMethodDescriptor, Microsoft.AspNetCore.SignalR.HubConnectionContext, Microsoft.AspNetCore.SignalR.Protocol.HubMethodInvocationMessage), System.Threading.Tasks.Task> callback, (Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher<Microsoft.AspNetCore.Components.Server.ComponentHub>, Microsoft.AspNetCore.SignalR.Internal.HubMethodDescriptor, Microsoft.AspNetCore.SignalR.HubConnectionContext, Microsoft.AspNetCore.SignalR.Protocol.HubMethodInvocationMessage) state) C#
Microsoft.AspNetCore.SignalR.Core.dll!Microsoft.AspNetCore.SignalR.Internal.ChannelBasedSemaphore.RunAsync<(Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher<Microsoft.AspNetCore.Components.Server.ComponentHub>, Microsoft.AspNetCore.SignalR.Internal.HubMethodDescriptor, Microsoft.AspNetCore.SignalR.HubConnectionContext, Microsoft.AspNetCore.SignalR.Protocol.HubMethodInvocationMessage)>(System.Func<(Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher<Microsoft.AspNetCore.Components.Server.ComponentHub>, Microsoft.AspNetCore.SignalR.Internal.HubMethodDescriptor, Microsoft.AspNetCore.SignalR.HubConnectionContext, Microsoft.AspNetCore.SignalR.Protocol.HubMethodInvocationMessage), System.Threading.Tasks.Task> callback, (Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher<Microsoft.AspNetCore.Components.Server.ComponentHub>, Microsoft.AspNetCore.SignalR.Internal.HubMethodDescriptor, Microsoft.AspNetCore.SignalR.HubConnectionContext, Microsoft.AspNetCore.SignalR.Protocol.HubMethodInvocationMessage) state) C#
Microsoft.AspNetCore.SignalR.Core.dll!Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher<Microsoft.AspNetCore.Components.Server.ComponentHub>.ProcessInvocation(Microsoft.AspNetCore.SignalR.HubConnectionContext connection, Microsoft.AspNetCore.SignalR.Protocol.HubMethodInvocationMessage hubMethodInvocationMessage, bool isStreamResponse) C#
Microsoft.AspNetCore.SignalR.Core.dll!Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher<System.__Canon>.DispatchMessageAsync(Microsoft.AspNetCore.SignalR.HubConnectionContext connection, Microsoft.AspNetCore.SignalR.Protocol.HubMessage hubMessage) C#
Microsoft.AspNetCore.SignalR.Core.dll!Microsoft.AspNetCore.SignalR.HubConnectionHandler<Microsoft.AspNetCore.Components.Server.ComponentHub>.DispatchMessagesAsync(Microsoft.AspNetCore.SignalR.HubConnectionContext connection) C#

Expected Behavior

No response

Steps To Reproduce

It's a larger project so it will take some time to repro this. I just wonder this error is known already?

Exceptions (if any)

No response

.NET Version

9.0.101

Anything else?

No response

[BrennanConroy]

I just wonder this error is known already?

Nope, this is the first time someone has reported this.

It's a larger project so it will take some time to repro this.

Thanks, in the meantime, are you able to hit this under a debugger? Is so it would be nice to get line numbers for where in DefaultHubDispatcher the issue is occurring, and also if possible information about what method on ComponentHub is being called.

[BrennanConroy]

Never mind, figured it out and made a repro.

[lvde0]

@BrennanConroy Is this issue tracked somewhere? :)

It's not really blocking me right now, but all the exceptions do slow down debug experience (via Visual Studio)

[BrennanConroy]

It's being tracked by this issue.

I have branch main...brecon/stoppedactivity which I'll make into a PR at some point.

[lvde0]

@BrennanConroy Thank you! :)