(BlazorServer) each navigation to external logs 2 errors a minute later

[springy76]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

Each time you leave the blazor circuit a minute later two exceptions are logged.

Expected Behavior

zero errors in log when no one does wrong things.

Steps To Reproduce

Run original sample created by dotnet.exe new blazorserver --name BlazorServerTemplate --output . -f net7.0 --auth Individual --use-program-main

On top right click on "Login" which is <a href="Identity/Account/Login">Log in</a> in LoginDisplay.razor.

Wait a minute (or maybe 2) then 2 errors are logged to console (or external logging apps like SEQ):

fail: Microsoft.AspNetCore.Components.Server.Circuits.RemoteNavigationManager[4]
      Navigation failed when changing the location to https://localhost:7206/Identity/Account/Login?returnUrl=~/counter
      System.Threading.Tasks.TaskCanceledException: A task was canceled.
         at Microsoft.JSInterop.JSRuntime.InvokeAsync[TValue](Int64 targetInstanceId, String identifier, Object[] args)
         at Microsoft.JSInterop.JSRuntimeExtensions.InvokeVoidAsync(IJSRuntime jsRuntime, String identifier, Object[] args)
         at Microsoft.AspNetCore.Components.Server.Circuits.RemoteNavigationManager.<>c__DisplayClass13_0.<<NavigateToCore>g__PerformNavigationAsync|0>d.MoveNext()
fail: Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost[111]
      Unhandled exception in circuit 'XaCjYqsnL_QC9xVVeKm9IEojYbj1uBcoSgjuyHwtR7U'.
      System.Threading.Tasks.TaskCanceledException: A task was canceled.
         at Microsoft.JSInterop.JSRuntime.InvokeAsync[TValue](Int64 targetInstanceId, String identifier, Object[] args)
         at Microsoft.JSInterop.JSRuntimeExtensions.InvokeVoidAsync(IJSRuntime jsRuntime, String identifier, Object[] args)
         at Microsoft.AspNetCore.Components.Server.Circuits.RemoteNavigationManager.<>c__DisplayClass13_0.<<NavigateToCore>g__PerformNavigationAsync|0>d.MoveNext()

Exceptions (if any)

TaskCancelledException

.NET Version

7.0.0

Thanks for contacting us.

We're moving this issue to the .NET 8 Planning milestone for future evaluation / consideration. We would like to keep this around to collect more feedback, which can help us with prioritizing this work. We will re-evaluate this issue, during our next planning meeting(s).
If we later determine, that the issue has no community involvement, or it's very rare and low-impact issue, we will close it - so that the team can focus on more important and high impact issues.
To learn more about what to expect next and how this issue will be handled you can read more about our triage process here.

[springy76]

Having rolled out our software with update net6->net7 our SEQ counter for (important) circuit crashes now increased from 20-40 per day to 1600-2000 per day.

One more callstack seems to be new, too:

Microsoft.JSInterop.JSDisconnectedException: JavaScript interop calls cannot be issued at this time. This is because the circuit has disconnected and is being disposed.
   at Microsoft.AspNetCore.Components.Server.Circuits.RemoteJSRuntime.BeginInvokeJS(Int64 asyncHandle, String identifier, String argsJson, JSCallResultType resultType, Int64 targetInstanceId)
   at Microsoft.JSInterop.JSRuntime.InvokeAsync[TValue](Int64 targetInstanceId, String identifier, CancellationToken cancellationToken, Object[] args)
   at Microsoft.JSInterop.JSRuntime.InvokeAsync[TValue](Int64 targetInstanceId, String identifier, Object[] args)
   at Microsoft.JSInterop.JSRuntimeExtensions.InvokeVoidAsync(IJSRuntime jsRuntime, String identifier, Object[] args)
   at Microsoft.AspNetCore.Components.Server.Circuits.RemoteNavigationManager.<>c__DisplayClass13_0.<<NavigateToCore>g__PerformNavigationAsync|0>d.MoveNext()

[bainn]

I am having the same issue, everything was working just fine. After shut down and restart then it started. Microsoft Edge will not even display anything and the error message comes to the console. Firefox displays the home but when you click the Login button then after a minute or so the error will show in console. Below is the error.

info: Microsoft.Hosting.Lifetime[14]
Now listening on: https://localhost:7190
info: Microsoft.Hosting.Lifetime[14]
Now listening on: http://localhost:5284
info: Microsoft.Hosting.Lifetime[0]
Application started. Press Ctrl+C to shut down.
info: Microsoft.Hosting.Lifetime[0]
Hosting environment: Development
info: Microsoft.Hosting.Lifetime[0]
Content root path: C:\Home\AppDevelopment\CLR\macOS\BMCL.LawReport.Web\BMCL.LawReport.Web
fail: Microsoft.AspNetCore.Components.Server.Circuits.RemoteNavigationManager[4]
Navigation failed when changing the location to https://localhost:7190/Identity/Account/Register
System.Threading.Tasks.TaskCanceledException: A task was canceled.
at Microsoft.JSInterop.JSRuntime.InvokeAsync[TValue](Int64 targetInstanceId, String identifier, Object[] args)
at Microsoft.JSInterop.JSRuntimeExtensions.InvokeVoidAsync(IJSRuntime jsRuntime, String identifier, Object[] args)
at Microsoft.AspNetCore.Components.Server.Circuits.RemoteNavigationManager.<>c__DisplayClass13_0.<g__PerformNavigationAsync|0>d.MoveNext()
fail: Microsoft.AspNetCore.Components.Server.Circuits.CircuitHost[111]
Unhandled exception in circuit '_A1lxTjBg9kuqSn-C42i1_2xnofAJ1BiPvN5nb2eENo'.
System.Threading.Tasks.TaskCanceledException: A task was canceled.
at Microsoft.JSInterop.JSRuntime.InvokeAsync[TValue](Int64 targetInstanceId, String identifier, Object[] args)
at Microsoft.JSInterop.JSRuntimeExtensions.InvokeVoidAsync(IJSRuntime jsRuntime, String identifier, Object[] args)
at Microsoft.AspNetCore.Components.Server.Circuits.RemoteNavigationManager.<>c__DisplayClass13_0.<g__PerformNavigationAsync|0>d.MoveNext()

[bainn]

Observations: Microsoft Edge is not able to display the home page at all. Firefox is able to display the home page, you are able to click login and fill in the form but when you click the blue login button, a few minutes later it logs the above errors.
Google Chrome, Brave, Opera and Vivaldi behave like Firefox but they do not log the error to the console.

Visual Studio Community edition version 17.4.2
Windows 11 Pro 22H2 Build 22621.900

I did windows update yesterday. That is the only thing I did that from then on it started given the error above. I hope the updated information helps.

[mtbayley]

Also running into a simalar exception with MircosoftIdentity

Message: Navigation failed when changing the location to https://..../MicrosoftIdentity/Account/SignOut
Callsite: Microsoft.AspNetCore.Components.Server.Circuits.RemoteNavigationManager.NavigateToCore
Exception: System.Threading.Tasks.TaskCanceledException: A task was canceled.
   at Microsoft.JSInterop.JSRuntime.InvokeAsync[TValue](Int64 targetInstanceId, String identifier, Object[] args)
   at Microsoft.JSInterop.JSRuntimeExtensions.InvokeVoidAsync(IJSRuntime jsRuntime, String identifier, Object[] args)
   at Microsoft.AspNetCore.Components.Server.Circuits.RemoteNavigationManager.<>c__DisplayClass13_0.<<NavigateToCore>g__PerformNavigationAsync|0>d.MoveNext()

[bainn]

Upon further investigation, I realized it was coming from the OnPostAsync method. I found out that Microsoft SQL server had stopped after windows update. Restarting SQL server in the services applet stopped the error and everything was okay. If in your appsettings.json file you use IP Address and you move to another subnet, you may experience similar frustration. Correction to the new IP Address will resolve the issue.

But strangely when I put the whole code block in a try catch nothing happened. It couldn't move past the following code which is the problematic code when SQL Server is offline and you don't know it's offline:

var result = await _signInManager.PasswordSignInAsync(Input.Email, Input.Password, Input.RememberMe, lockoutOnFailure: false);
Now, my question is: How do you report to your user if something has gone wrong and send a graceful message like "No internet connection or Database is down?" Below is the code in a try/catch:

` public async Task OnPostAsync(string returnUrl = null)
{
try
{
returnUrl ??= Url.Content("~/");

            ExternalLogins = (await _signInManager.GetExternalAuthenticationSchemesAsync()).ToList();

            if (ModelState.IsValid)
            {
                // This doesn't count login failures towards account lockout
                // To enable password failures to trigger account lockout, set lockoutOnFailure: true
                var result = await _signInManager.PasswordSignInAsync(Input.Email, Input.Password, Input.RememberMe, lockoutOnFailure: false);
                if (result.Succeeded)
                {
                    _logger.LogInformation("User logged in.");
                    return LocalRedirect(returnUrl);
                }
                if (result.RequiresTwoFactor)
                {
                    return RedirectToPage("./LoginWith2fa", new { ReturnUrl = returnUrl, RememberMe = Input.RememberMe });
                }
                if (result.IsLockedOut)
                {
                    _logger.LogWarning("User account locked out.");
                    return RedirectToPage("./Lockout");
                }
                else
                {
                    ModelState.AddModelError(string.Empty, "Invalid login attempt.");
                    return Page();
                }
            }

            // If we got this far, something failed, redisplay form
            return Page();
        }
        catch (Exception ex)
        {
            ErrorMessage = ex.Message;
            return Page();
        }
    }

`

[Tim-Hodge]

@springy76 @mkArtakMSFT any updates or known workarounds for this one?

[Schtailian]

i have the same issue. I check if the user is authenticated, if not i redirect to the login page.

My App.razor looks like this.

<CascadingAuthenticationState>
    <Router AppAssembly="@typeof(Program).Assembly">
        <Found Context="routeData">
            <AuthorizeRouteView RouteData="@routeData" DefaultLayout="@typeof(MainLayout)">
                <NotAuthorized>
                    @if (!IsAuthenticated())
                    {
                        <h1>Hi,</h1>
                        <p>You need to login</p>
                        <a href="login?redirectUri=@NavigationManager.Uri">Login now</a>
                    }
                    else
                    {
                        <h1>Hi,</h1>
                        <p>You have no access rights</p>
                        <p>Contact an administrator</p>
                    }
                </NotAuthorized>
                <Authorizing>
                    <p>Loading...</p>
                </Authorizing>
            </AuthorizeRouteView>
        </Found>
        <NotFound>
            <LayoutView Layout="@typeof(MainLayout)">
                <p>404 - Not Found</p>
            </LayoutView>
        </NotFound>
    </Router>
</CascadingAuthenticationState>

@code {
    private bool IsAuthenticated()
    {
        var authState = AuthenticationStateProvider.GetAuthenticationStateAsync().Result;
        var user = authState.User;

        if (user.Identity!.IsAuthenticated)
        {
            return true;
        }
        else
        {
            try {
                NavigationManager.NavigateTo($"login?redirectUri={NavigationManager.Uri}", true, true);
            }
            catch { }
            return false;
        }

    }
}

Error
Navigation failed when changing the location to login?redirectUri=https://domain.com/application/

System.Threading.Tasks.TaskCanceledException: A task was canceled.
  File "JSRuntime.cs", in async ValueTask<TValue> JSRuntime.InvokeAsync<TValue>(long targetInstanceId, string identifier, object[] args)
  File "JSRuntimeExtensions.cs", in async ValueTask JSRuntimeExtensions.InvokeVoidAsync(IJSRuntime jsRuntime, string identifier, params object[] args)
  File "RemoteNavigationManager.cs", in async void RemoteNavigationManager.NavigateToCore(string uri, NavigationOptions options)+PerformNavigationAsync(?)

It's a Blazor Server Application, .NET 7

[springy76]

@Schtailian just a side note regarding your code snippet: Do not use the Result property of Tasks to "await" a task, all sorts of deadlocks might happen using such code. The NotAuthorized renderfragment already transports the awaited AuthenticationState by context variable, just pass it around:

                <NotAuthorized Content="authState">
                    @if (!IsAuthenticated(authState))