When setting up SignalR routes, you need to add the routes to ReservedPaths

[nul800sebastiaan]

What type of issue is it? (Choose one - delete the others)

Amending existing docs

What article/section is this about?

ReservedPaths

Describe the issue

As I've just learned from umbraco/Umbraco-CMS#13005 (comment) - when you add a SignalR route, Umbraco will try to find the page and end up in either custom 404 handlers or execute Umbraco's default ContentFinderByConfigured404. This is unnecessary and gives quite a bit of overhead. Instead we should add the SignalR route to the ReservedPaths config, like so:

  "Umbraco": {
    "CMS": {
      "Global": {
        "ReservedPaths": "~/app_plugins/,~/install/,~/mini-profiler-resources/,~/umbraco/,~/umbraco/testhub/"
        }
      }
    }
  }

Note that you need to provide the default reserved paths (`~/app_plugins,~/install/` etc), else you'll run into the issue described in https://github.com/umbraco/Umbraco-CMS/issues/12965

[eshanrnh]

Thanks, @nul800sebastiaan. We will add the info in the docs soon 🙂

[eshanrnh]

You can find this documentation at https://our.umbraco.com/Documentation/Implementation/Custom-Routing/signalR#add-the-route-in-appsettingsjson-file