SignalR disconnecting every few minutes after the tab is backgrounded-CodePudding

I'm using SignalR for communication between a Vue.js frontend and dotnet backend.

When you background the frontend tab after a (seemingly random) amount of time the connection gets disconnected. Because I'm using auto reconnect the socket is then reconnected, but then until the tab is re-focused the socket will continue to get disconnected every couple of minutes putting it in a reconnecting loop.

A few things:

Seems to happen in all browsers but Firefox
When running both the frontend and backend locally, there's no issue
Running the frontend locally but backend remotely does cause the issue
Neither application are running on IIS
Kestrel timeouts have been set to an hour (just in case)
The initial disconnect that causes the reconnects to start looping doesn't happen at a consistent time, just somewhere around the 5-10 minute mark
No errors are being thrown by either end

Client side code is extremely basic:

 this.connection = new HubConnectionBuilder()
        .withUrl(this.url)
        .withAutomaticReconnect()
        .build()

Server side code is similarly basic:

 public override async Task OnConnectedAsync()
    {
        //Create client code here

        await base.OnConnectedAsync();
    }

    public override async Task OnDisconnectedAsync(Exception exception)
    {
        if(exception != null) _logger.LogErrorToFile(exception.Message);
        _logger.LogInformationToFile($"Client with id: {GetConnectionId()} disconnected.{GetUsername()}");
        await base.OnDisconnectedAsync(exception);
    }

CodePudding user response：

Chrome made an update earlier this year that stops connections when they are no in focus after about 5 minutes. The issue/fix that Nirbhay commented is actually for the ASP.NET version (2.4.2) and not compatible with .NET CORE. Here is the issue that was raised for .NET CORE - github.com/dotnet/aspnetcore/issues/31079