Azure SignalR withAutomaticReconnect() "Error: Connection disconnected with error" on Angular8 & Asp.Net Core 3.1

Md. Najrul Islam 1

hi there,

I am using Azure SignalR on Asp.Net Core 3.1 and Angular8. I also user withAutomaticReconnect() option on client side. It connect with azure signalr successfully. But after some times it show this error message and connected to the WebSocket again.

1 answer

Ryan Hill 28,716 Microsoft Employee

Hi @MdNajrullslam-2962,

Make sure you double check that your KeepAliveInterval option is double the serverTimeoutInMilliseconds property. That property will ping the SignalR hub in order to have the connection remain open.

public void ConfigureServices(IServiceCollection services)  
{  
    services.AddSignalR(hubOptions =>  
    {  
        hubOptions.EnableDetailedErrors = true;  
        hubOptions.KeepAliveInterval = TimeSpan.FromMinutes(1);  
    });  
}

Najrul Islam 1

 //Asp.Net Core
    //register Azure SignalR
                services.AddSignalR(hubOptions =>
                {
                    hubOptions.EnableDetailedErrors = true;
                    hubOptions.KeepAliveInterval = TimeSpan.FromMinutes(2);
                    hubOptions.ClientTimeoutInterval = TimeSpan.FromMinutes(2);
                }).AddAzureSignalR(Configuration["SignalR_Endpoint"].ToString());

    //Angular
     this.hubConnection = new HubConnectionBuilder()
                .withUrl(`${environment.client.signalr_endpoint}`, { accessTokenFactory: () => accessToken })
                .withAutomaticReconnect()
                .build();enter code here
              this.hubConnection.serverTimeoutInMilliseconds = 240000;// 4 minutes
              this.startConnection();
              this.registerEvents();
        }

But still error

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Azure SignalR withAutomaticReconnect() "Error: Connection disconnected with error" on Angular8 & Asp.Net Core 3.1

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