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MapBlazorHub configuration in NET8 throws a The request matched multiple endpoints exception #51698

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MapBlazorHub configuration in NET8 throws a The request matched multiple endpoints exception#51698

Description

@shrayasr

shrayasr
openedon Oct 27, 2023

Is there an existing issue for this?

  • I have searched the existing issues

Describe the bug

We are working on migrating our blazor server application from NET6 to NET8 (to solve some auth issues we were having) and the guide advised this of us:

- app.MapBlazorHub();
+ app.MapRazorComponents<App>()
+   .AddInteractiveServerRenderMode()

And we didn't know where to move the endpoint configuration to, which was previously being done in MapBlazorHub. Our previous call looked like this:

endpoints.MapBlazorHub(config =>
{
    config.CloseOnAuthenticationExpiration = true;
});

This was clarified by @guardrex in dotnet/AspNetCore.Docs#30843 where it was asked for us to place the MapBlazorHub call after the call to MapRazorComponents ... AddInteractiveServerRenderMode block. Which we did. The effective new code looks like this:

app.MapRazorComponents<App>()
    .AddInteractiveServerRenderMode();

app.MapBlazorHub(config =>
{
    config.CloseOnAuthenticationExpiration = true;
});

However, after doing this and running our project, we got the following exception:

Microsoft.AspNetCore.Routing.Matching.AmbiguousMatchException: The request matched multiple endpoints. Matches: Blazor initializers

And blazor doesn't seem to boot up on the browser.

Expected Behavior

Server should close the connection once the authentication expiry period is elapsed. This used to happen in NET6.

Steps To Reproduce

We have made a simple reproduction of this and the same is up at: https://github.com/kalai-logicsoft/BlazorNet8AuthTest

Exceptions (if any)

Console

info: Microsoft.AspNetCore.Hosting.Diagnostics[1]
      Request starting HTTP/1.1 GET http://localhost:5191/_blazor/initializers - - -
dbug: Microsoft.AspNetCore.Routing.Matching.DfaMatcher[1001]
      2 candidate(s) found for the request path '/_blazor/initializers'
dbug: Microsoft.AspNetCore.Routing.Matching.DfaMatcher[1005]
      Endpoint 'Blazor initializers' with route pattern '/_blazor/initializers/' is valid for the request path '/_blazor/initializers'
dbug: Microsoft.AspNetCore.Routing.Matching.DfaMatcher[1005]
      Endpoint '(null)' with route pattern '/_blazor/initializers/' is valid for the request path '/_blazor/initializers'
dbug: Microsoft.AspNetCore.Server.Kestrel.Connections[9]
      Connection id "0HMUMNLG9R88S" completed keep alive response.
info: Microsoft.AspNetCore.Hosting.Diagnostics[2]
      Request finished HTTP/1.1 GET http://localhost:5191/_vs/browserLink - 200 - text/javascript;+charset=UTF-8 111.2111ms
fail: Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware[1]
      An unhandled exception has occurred while executing the request.
      Microsoft.AspNetCore.Routing.Matching.AmbiguousMatchException: The request matched multiple endpoints. Matches:

      Blazor initializers

         at Microsoft.AspNetCore.Routing.Matching.DefaultEndpointSelector.ReportAmbiguity(Span`1 candidateState)
         at Microsoft.AspNetCore.Routing.Matching.DefaultEndpointSelector.ProcessFinalCandidates(HttpContext httpContext, Span`1 candidateState)
         at Microsoft.AspNetCore.Routing.Matching.DefaultEndpointSelector.Select(HttpContext httpContext, Span`1 candidateState)
         at Microsoft.AspNetCore.Routing.Matching.DfaMatcher.MatchAsync(HttpContext httpContext)
         at Microsoft.AspNetCore.Routing.EndpointRoutingMiddleware.Invoke(HttpContext httpContext)
         at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddlewareImpl.Invoke(HttpContext context)
dbug: Microsoft.AspNetCore.Server.Kestrel.Connections[9]
      Connection id "0HMUMNLG9R88R" completed keep alive response.
info: Microsoft.AspNetCore.Hosting.Diagnostics[2]
      Request finished HTTP/1.1 GET http://localhost:5191/_blazor/initializers - 500 - text/plain;+charset=utf-8 53.8392ms

Browser

GET http://localhost:5191/_blazor/initializers 500 (Internal Server Error)
(anonymous) @ blazor.web.js:1
(anonymous) @ blazor.web.js:1
startCircutIfNotStarted @ blazor.web.js:1
resolveRendererIdForDescriptor @ blazor.web.js:1
determinePendingOperation @ blazor.web.js:1
refreshRootComponents @ blazor.web.js:1
(anonymous) @ blazor.web.js:1
setTimeout (async)
rootComponentsMayRequireRefresh @ blazor.web.js:1
onDocumentUpdated @ blazor.web.js:1
Ds @ blazor.web.js:1

VM69:1  Uncaught (in promise) SyntaxError: Unexpected token 'M', "Microsoft."... is not valid JSON
await (async)
startCircutIfNotStarted @ blazor.web.js:1
resolveRendererIdForDescriptor @ blazor.web.js:1
determinePendingOperation @ blazor.web.js:1
refreshRootComponents @ blazor.web.js:1
(anonymous) @ blazor.web.js:1
setTimeout (async)
rootComponentsMayRequireRefresh @ blazor.web.js:1
onDocumentUpdated @ blazor.web.js:1
Ds @ blazor.web.js:1

aspnetcore-browser-refresh.js:260  WebSocket connection to 'wss://localhost:44332/BlazorNet8AuthTest/' failed: 
(anonymous) @ aspnetcore-browser-refresh.js:260
getWebSocket @ aspnetcore-browser-refresh.js:257
(anonymous) @ aspnetcore-browser-refresh.js:16
aspnetcore-browser-refresh.js:19 WebSocket failed to connect.

.NET Version

8.0.100-rc.2.23502.2

Anything else?

dotnet --info

.NET SDK:
Version:   8.0.100-rc.2.23502.2
Commit:    0abacfc2b6

Runtime Environment:
OS Name:     Windows
OS Version:  10.0.22621
OS Platform: Windows
RID:         win-x64
Base Path:   C:\Program Files\dotnet\sdk\8.0.100-rc.2.23502.2\

.NET workloads installed:
There are no installed workloads to display.

Host:
  Version:      8.0.0-rc.2.23479.6
  Architecture: x64
  Commit:       0b25e38ad3

.NET SDKs installed:
  2.1.526 [C:\Program Files\dotnet\sdk]
  2.2.110 [C:\Program Files\dotnet\sdk]
  2.2.207 [C:\Program Files\dotnet\sdk]
  3.1.426 [C:\Program Files\dotnet\sdk]
  5.0.103 [C:\Program Files\dotnet\sdk]
  5.0.408 [C:\Program Files\dotnet\sdk]
  5.0.416 [C:\Program Files\dotnet\sdk]
  6.0.319 [C:\Program Files\dotnet\sdk]
  7.0.310 [C:\Program Files\dotnet\sdk]
  8.0.100-rc.2.23502.2 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.All 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.2.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.App 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.2.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 5.0.3 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 6.0.7 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 6.0.9 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 6.0.10 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 6.0.12 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 6.0.23 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 6.0.24 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 7.0.12 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 7.0.13 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 8.0.0-rc.2.23480.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 1.0.3 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.2.8 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 5.0.3 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.7 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.10 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.12 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.15 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.23 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.24 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 7.0.12 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 7.0.13 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 8.0.0-rc.2.23479.6 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.WindowsDesktop.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 5.0.3 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 6.0.7 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 6.0.9 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 6.0.10 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 6.0.12 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 6.0.15 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 6.0.23 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 6.0.24 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 7.0.12 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 7.0.13 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 8.0.0-rc.2.23479.10 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
  arm64 [C:\Program Files\dotnet]
    registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\arm64\InstallLocation]
  x86   [C:\Program Files (x86)\dotnet]
    registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation]

Environment variables:
  Not set

global.json file:
  Not found

Learn more:
  https://aka.ms/dotnet/info

Download .NET:
  https://aka.ms/dotnet/download
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    DocsThis issue tracks updating documentationarea-blazorIncludes: Blazor, Razor Components

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