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System.Net.Sockets.Tests tests fail with ObjectDisposedException #126183
Description
Build Information
Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1512502
Build error leg or test failing: System.Net.Sockets.Tests.WorkItemExecution
Pull request: #126006
Error Message
Fill the error message using step by step known issues guidance.
{
"ErrorMessage": ["System.Net.Sockets.Tests", "ObjectDisposedException", "System.Net.Sockets.SafeSocketHandle"],
"ErrorPattern": "",
"BuildRetry": false,
"ExcludeConsoleLog": false
}net11.0-osx-Debug-x64-Mono_Minijit_Debug-OSX.15.Amd64.Open
Starting: System.Net.Sockets.Tests (parallel test collections = on [2 threads], stop on fail = off)
[ERROR] FATAL UNHANDLED EXCEPTION: System.ObjectDisposedException: Cannot access a disposed object.
Object name: 'System.Net.Sockets.SafeSocketHandle'.
at System.Runtime.InteropServices.SafeHandle.DangerousAddRef(Boolean& success) in /_/src/libraries/System.Private.CoreLib/src/System/Runtime/InteropServices/SafeHandle.cs:line 165
at System.Runtime.InteropServices.Marshalling.SafeHandleMarshaller`1.ManagedToUnmanagedIn[[System.Runtime.InteropServices.SafeHandle, System.Private.CoreLib, Version=11.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].FromManaged(SafeHandle handle) in /_/src/libraries/System.Private.CoreLib/src/System/Runtime/InteropServices/Marshalling/SafeHandleMarshaller.cs:line 32
at Interop.Sys.Fcntl.SetIsNonBlocking(SafeHandle fd, Int32 isNonBlocking) in /_/artifacts/obj/System.Net.Sockets/Debug/net11.0-unix/Microsoft.Interop.LibraryImportGenerator/Microsoft.Interop.LibraryImportGenerator/LibraryImports.g.cs:line 314
at System.Net.Sockets.SocketAsyncContext.SetHandleBlocking() in /_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/SocketAsyncContext.Unix.cs:line 1386
at System.Net.Sockets.SafeSocketHandle.SetBlocking() in /_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/SafeSocketHandle.Unix.cs:line 154
at System.Net.Sockets.SocketAsyncContext.ConnectOperation.InvokeCallback(Boolean allowPooling) in /_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/SocketAsyncContext.Unix.cs:line 681
at System.Net.Sockets.SocketAsyncContext.OperationQueue`1[[System.Net.Sockets.SocketAsyncContext.WriteOperation, System.Net.Sockets, Version=11.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].ProcessAsyncOperation(WriteOperation op) in /_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/SocketAsyncContext.Unix.cs:line 1027
at System.Net.Sockets.SocketAsyncContext.ProcessAsyncWriteOperation(WriteOperation op) in /_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/SocketAsyncContext.Unix.cs:line 1468
at System.Net.Sockets.SocketAsyncContext.WriteOperation.System.Threading.IThreadPoolWorkItem.Execute() in /_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/SocketAsyncContext.Unix.cs:line 347
at System.Net.Sockets.SocketAsyncContext.AsyncOperation.Process() in /_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/SocketAsyncContext.Unix.cs:line 291
at System.Net.Sockets.SocketAsyncContext.HandleEvents(SocketEvents events) in /_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/SocketAsyncContext.Unix.cs:line 2302
at System.Net.Sockets.SocketAsyncEngine.System.Threading.IThreadPoolWorkItem.Execute() in /_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/SocketAsyncEngine.Unix.cs:line 279
at System.Threading.ThreadPoolWorkQueue.Dispatch() in /_/src/libraries/System.Private.CoreLib/src/System/Threading/ThreadPoolWorkQueue.cs:line 950
at System.Threading.PortableThreadPool.WorkerThread.WorkerDoWork(PortableThreadPool threadPoolInstance) in /_/src/libraries/System.Private.CoreLib/src/System/Threading/PortableThreadPool.WorkerThread.cs:line 145
at System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart() in /_/src/libraries/System.Private.CoreLib/src/System/Threading/PortableThreadPool.WorkerThread.cs:line 121
at System.Threading.Thread.StartHelper.RunWorker() in /_/src/libraries/System.Private.CoreLib/src/System/Threading/Thread.cs:line 90
Known issue validation
Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1512502
Error message validated: [System.Net.Sockets.Tests ObjectDisposedException System.Net.Sockets.SafeSocketHandle]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 7/17/2026 11:25:31 AM UTC
Report
Summary
| 24-Hour Hit Count | 7-Day Hit Count | 1-Month Count |
|---|---|---|
| 0 | 0 | 0 |
Report
| Build | Repository | Test | Pull Request |
|---|---|---|---|
| 1512502 | dotnet/runtime | System.Net.Sockets.Tests.WorkItemExecution | #130416 |
Summary
| 24-Hour Hit Count | 7-Day Hit Count | 1-Month Count |
|---|---|---|
| 1 | 1 | 1 |
Report
Summary
| 24-Hour Hit Count | 7-Day Hit Count | 1-Month Count |
|---|---|---|
| 0 | 2 | 20 |
Activity
dotnet-policy-service commentedon Mar 27, 2026
Tagging subscribers to this area: @karelz, @dotnet/ncl
See info in area-owners.md if you want to be subscribed.
rzikm commentedon Mar 27, 2026
@liveans seems like this is related to setting non-blocking after connectasync
liveans commentedon Mar 27, 2026
Seems like we need to make
SetHandleBlockingbest effort, I'll take a look next week.jeffschwMSFT commentedon Jun 1, 2026
removing blocking-clean-ci as it has not failed in 30 days
svick commentedon Jul 17, 2026
I have encountered this in #130416, so I'm adding blocking-clean-ci back. Note that the
ErrorMessageseems to have been wrong: it rarely matched, so I have fixed it.bblankenship78 commentedon Oct 12, 2026
We're testing .NET11 and encountering this issue in RC1. Any updates?