Azure SignalR SDK is not working within Orchard Core Module

[lampersky]

Describe the bug

When using Azure SignalR SDK within orchard module I'm not getting response for keep-alive request {"type":6}.
Everything works fine when switching to local SignalR.

To Reproduce

1. Repro repo is located here https://github.com/lampersky/OrchardModuleWithAzureSignalRServiceSDK,
   (Repro project is made using dotnet cli, ocmvc + ocmodulemvc),
2. Edit Startup.cs in Repro.TestModule and in SimpleMvc.Web by providing connection string to your AzureSignalR instance,
   .AddAzureSignalR("Endpoint=https://your-endpoint.signalr.net;AccessKey={your-access-key};Version=1.0;");
   or comment out this line to run project without Azure SignalR Service,
3. Run Repro.Web project and check Network tab in your browser.

Exceptions (if any)

No exceptions just no response for ping request.

Further technical details

• Azure SignalR SDK version 1.7.0
• Server ASPNETCORE version 3.1.0
• Your SignalR Client SDK version 5.0.2
• Orchard Core version 1.0.0-rc2-15791

Connected Issue

I've also created bug in Orchard Core issue tracker, where you can find more (maybe usuful) details:
OrchardCMS/OrchardCore#8409

[lampersky]

I'm closing this issue.

Orchard core doesn't support IHostedService, that's why HeartBeat service is registered but not started, and this is why we can observe missing keep alive message.

OrchardCMS/OrchardCore#8409 (comment)