[ci-scan] Test failure: System.Net.WebSockets.Tests.WebSocketKeepAliveTests.WebSocketServer_NoUserReadOrWrite_SendsPingAndReadsPongResponse

[rzikm]

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1586034
Build error leg or test failing: net11.0-osx-Debug-arm64-coreclr_checked-OSX.26.Arm64.Open - System.Net.WebSockets.Tests
Pull request: #133361

KBE authoring guidance (ci-failure-scan)

• Error Details is for readers. The assertion and stack trace are included below so the failure is understandable without opening the raw log.
• Build Analysis parses only the JSON block under Error Message.
• ErrorMessage entries are case-sensitive ordinal String.Contains substrings copied verbatim from the failing log.
• BuildRetry is false because this is a recurring test failure rather than a clear infrastructure retry case.

Error Details

System.Net.WebSockets.Tests.WebSocketKeepAliveTests.WebSocketServer_NoUserReadOrWrite_SendsPingAndReadsPongResponse [FAIL]
  Assert.Equal() Failure: Values differ
  Expected: Aborted
  Actual:   Open
  at System.Net.WebSockets.Tests.WebSocketKeepAliveTests.WebSocketServer_NoUserReadOrWrite_SendsPingAndReadsPongResponse() in /_/src/libraries/System.Net.WebSockets/tests/WebSocketKeepAliveTests.cs:line 156
--- End of stack trace from previous location ---

This recurred after #108298 was closed. That predecessor covered browser/Wasm on Linux, while this occurrence is macOS arm64 CoreCLR.

Error Message

{
  "ErrorMessage": [
    "System.Net.WebSockets.Tests.WebSocketKeepAliveTests.WebSocketServer_NoUserReadOrWrite_SendsPingAndReadsPongResponse",
    "Assert.Equal() Failure: Values differ",
    "Expected: Aborted",
    "Actual:   Open"
  ],
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Agentic workflow metadata (ci-failure-scan)

Workflow artifact: ci-failure-scan
Artifact kind: kbe-verification
Verified match count: 1 hit in the failed test result

Note

This issue was generated by GitHub Copilot.

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1586034
Error message validated: [System.Net.WebSockets.Tests.WebSocketKeepAliveTests.WebSocketServer_NoUserReadOrWrite_SendsPingAndReadsPongResponse Assert.Equal() Failure: Values differ Expected: Aborted Actual: Open]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 9/7/2026 6:15:41 PM UTC

Report

Build	Repository	Test	Pull Request
1586433	dotnet/runtime	System.Net.WebSockets.Tests.WebSocketKeepAliveTests.WebSocketServer_NoUserReadOrWrite_SendsPingAndReadsPongResponse	#133378
1586034	dotnet/runtime	System.Net.WebSockets.Tests.WebSocketKeepAliveTests.WebSocketServer_NoUserReadOrWrite_SendsPingAndReadsPongResponse	#133361

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
2	2	2

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