SignalR Hangs

Question

Hi

I have an Azure Web App that hosts a signalr Hub. I have been testing with one client and the app appears to be hanging. The client calls many Signalr operations at one time and I;m not clear if this is causing the app to hang. Can someone explain how SignalR should be configured to allow multiple calls at one time?

Peter

Answer 1

Hi @Peter Simard
Thanks for the question and using MS Q&A platform.

I'm glad that you were able to resolve your issue and thank you for posting your solution so that others experiencing the same thing can easily reference this! Since the Microsoft Q&A community has a policy that "The question author cannot accept their own answer. They can only accept answers by others ", I'll repost your solution in case you'd like to accept the answer. 

To allow multiple parallel calls per client in SignalR, set the MaximumParallelInvocationsPerClient property in your Program.cs or Startup.cs during the SignalR setup.
var builder = WebApplication.CreateBuilder(args);

// Configure SignalR with MaximumParallelInvocationsPerClient
builder.Services.AddSignalR(options =>
{
  options.MaximumParallelInvocationsPerClient = 10; // Allow up to 10 parallel invocations per client
});
 
var app = builder.Build();
 
// Map SignalR hubs
app.MapHub<MyHub>("/myhub");
 
app.Run();

references:
https://learn.microsoft.com/en-us/dotnet/api/microsoft.aspnetcore.signalr.huboptions.maximumparallelinvocationsperclient?view=aspnetcore-8.0

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