You signed in with another tab or window. Reload to refresh your session.You signed out in another tab or window. Reload to refresh your session.You switched accounts on another tab or window. Reload to refresh your session.Dismiss alert
{
"ErrorMessage": "Error when dispatching 'OnDisconnectedAsync' on hub",
"BuildRetry": true,
"ExcludeConsoleLog": false
}
Description
TestServerTests.LongPollingWorks fails intermittently when the test host shuts down and OnDisconnectedAsync races with IServiceProvider disposal. The HttpConnectionDispatcher.ProcessDeleteAsync fire-and-forgets server-side connection disposal, so when the host tears down, DefaultHubDispatcher.OnDisconnectedAsync can attempt to call CreateAsyncScope() on an already-disposed ServiceProvider, throwing ObjectDisposedException.
Stack trace:
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.ServiceLookup.ServiceProviderEngineScope.CreateScope()
at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.CreateAsyncScope(IServiceScopeFactory serviceScopeFactory)
at Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher`1.OnDisconnectedAsync(HubConnectionContext connection, Exception exception)
at Microsoft.AspNetCore.SignalR.HubConnectionHandler`1.RunHubAsync(HubConnectionContext connection)
Fix in progress:#65457 catches ObjectDisposedException at the DI boundary in DefaultHubDispatcher.OnDisconnectedAsync.
Build Information
Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1325148
Build error leg or test failing: Tests: Helix x64 Subset 2 / Microsoft.AspNetCore.SignalR.Client.Tests--net11.0
Pull request: #65694
Error Message
{ "ErrorMessage": "Error when dispatching 'OnDisconnectedAsync' on hub", "BuildRetry": true, "ExcludeConsoleLog": false }Description
TestServerTests.LongPollingWorksfails intermittently when the test host shuts down andOnDisconnectedAsyncraces withIServiceProviderdisposal. TheHttpConnectionDispatcher.ProcessDeleteAsyncfire-and-forgets server-side connection disposal, so when the host tears down,DefaultHubDispatcher.OnDisconnectedAsynccan attempt to callCreateAsyncScope()on an already-disposedServiceProvider, throwingObjectDisposedException.Stack trace:
Fix in progress: #65457 catches
ObjectDisposedExceptionat the DI boundary inDefaultHubDispatcher.OnDisconnectedAsync.Known issue validation
Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1325148
Error message validated:
[Error when dispatching 'OnDisconnectedAsync' on hub]Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 3/7/2026 10:12:12 PM UTC
Report
Summary