Abp

[CodeOutput]

Describe the bug

System.OperationCanceledException: The operation was canceled.

When you try to execute await _connection?.stop();, you encounter an error. Do you have any idea why this might be happening?

To Reproduce

dotnet tool install -g Volo.Abp.Studio.Cli

Exceptions (if any)

Further technical details

• Abp 9.1.0
• IIS 10
• Net 9

[vicancy]

Looks like cancellationToken is cancelled, is _cancellationTokenProvider.Cancel() triggered anywhere?

[CodeOutput]

Hello @vicancy
Cancel is not triggered anywhere, but when I press the "Run" button in Android Studio to restart the application or exit the application using the exit button, this error occurs. Because of this error, we cannot correctly display online users in the system. Do you have any ideas?
i use flutter

[vicancy]

When you "restart the application or exit the application", I think _cancellationTokenProvider is disposed or canceled somehow (it depends on your implementation), and thus cancellationToken is cancelled and OperationCanceledException is thrown. I suggest you removing cancellationToken in your async calls first to eliminate the impact of the cancellationToken for now, to see if that meets your expectation, and then find a better way to control when/how to cancel CancellationToken

[CodeOutput]

@vicancy same error

[vicancy]

I don't think it relates to Azure SignalR, I would suggest you digging into where the OperationCanceledException throws. One possibility is _userConnectionRespository is disposed, triggering this exception.

[CodeOutput]

@vicancy Thank you for your help

[vicancy]

Hi @CodeOutput , just realized that the objects might be disposed during the application shutdown. Which Azure SignalR SDK are you using? In the latest version, we hook into the application shutdown process to close the connections before the disposing process.