Quarantine Microsoft.AspNetCore.SignalR.Client.Tests.TestServerTests.LongPollingWorks

[github-actions]

Failing Test(s)

Microsoft.AspNetCore.SignalR.Client.Tests.TestServerTests.LongPollingWorks

Error Message

Error message not available from test result records. See build logs for details.

Stacktrace

Stack trace

Not available. See build logs for details.

Logs

Console log

Not available. See build logs for details.

Build

https://dev.azure.com/dnceng-public/public/_build/results?buildId=1320863

Failed in builds 1320863 and 1322771 on the main branch.

Generated by Daily Test Quarantine Management · ◷

Warning

⚠️ Firewall blocked 6 domains

The following domains were blocked by the firewall during workflow execution:

• d0svsblobprodcus381.vsblob.vsassets.io
• example.com
• kijvsblobprodcus387.vsblob.vsassets.io
• learn.microsoft.com
• spsprodcus4.vssps.visualstudio.com
• ytvvsblobprodcus310.vsblob.vsassets.io

To allow these domains, add them to the network.allowed list in your workflow frontmatter:

network:
  allowed:
    - defaults
    - "d0svsblobprodcus381.vsblob.vsassets.io"
    - "example.com"
    - "kijvsblobprodcus387.vsblob.vsassets.io"
    - "learn.microsoft.com"
    - "spsprodcus4.vssps.visualstudio.com"
    - "ytvvsblobprodcus310.vsblob.vsassets.io"

See Network Configuration for more information.

[github-actions]

Investigation

Error message:

1 error(s) logged.
Microsoft.AspNetCore.SignalR.HubConnectionHandler - ErrorDispatchingHubEvent - Error when dispatching 'OnDisconnectedAsync' on hub.
===================
System.ObjectDisposedException: Cannot access a disposed object.
Object name: 'IServiceProvider'.
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ThrowHelper.ThrowObjectDisposedException()
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.CreateScope()
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.CreateAsyncScope(IServiceScopeFactory serviceScopeFactory)
   at Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher`1.OnDisconnectedAsync(HubConnectionContext connection, Exception exception) in DefaultHubDispatcher.cs:line 121

Stack trace:

at Microsoft.Extensions.DependencyInjection.ServiceLookup.ThrowHelper.ThrowObjectDisposedException()
at Microsoft.Extensions.DependencyInjection.ServiceProvider.CreateScope()
at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.CreateAsyncScope(IServiceScopeFactory serviceScopeFactory)
at Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher`1.OnDisconnectedAsync(HubConnectionContext connection, Exception exception)

Analysis: This is a race condition between test teardown and SignalR's connection lifecycle. When the test disposes the TestServer (and its IServiceProvider) while the long-polling client is still connected, the disposal races with OnDisconnectedAsync being dispatched on the hub. If DefaultHubDispatcher.OnDisconnectedAsync tries to call CreateAsyncScope() on an already-disposed ServiceProvider, it throws ObjectDisposedException. The VerifiableLoggedTest base class treats any error-level log entry as a test failure.

This is a known race condition in test infrastructure when using TestServer with SignalR hubs that perform DI operations in OnDisconnectedAsync.

Generated by Daily Test Quarantine Management · ◷

Warning

⚠️ Firewall blocked 6 domains

The following domains were blocked by the firewall during workflow execution:

• d0svsblobprodcus381.vsblob.vsassets.io
• example.com
• kijvsblobprodcus387.vsblob.vsassets.io
• learn.microsoft.com
• spsprodcus4.vssps.visualstudio.com
• ytvvsblobprodcus310.vsblob.vsassets.io

To allow these domains, add them to the network.allowed list in your workflow frontmatter:

network:
  allowed:
    - defaults
    - "d0svsblobprodcus381.vsblob.vsassets.io"
    - "example.com"
    - "kijvsblobprodcus387.vsblob.vsassets.io"
    - "learn.microsoft.com"
    - "spsprodcus4.vssps.visualstudio.com"
    - "ytvvsblobprodcus310.vsblob.vsassets.io"

See Network Configuration for more information.