[QUIC] Sporadic long running tests

[ManickaP]

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1149293
Build error leg or test failing: System.Net.Quic.Functional.Tests.WorkItemExecution
Pull request: #119747

Error Message

Fill the error message using step by step known issues guidance.

{
  "ErrorMessage": "System.Net.Quic.Functional.Tests: [Long Running Test]",
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1149293
Error message validated: [System.Net.Quic.Functional.Tests: [Long Running Test]]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 9/16/2025 2:08:19 PM UTC

Report

Build	Definition	Test	Pull Request
1175771	dotnet/runtime	System.Net.Quic.Functional.Tests.WorkItemExecution	#120751
1169375	dotnet/runtime	System.Net.Quic.Functional.Tests.WorkItemExecution	#120541
1169108	dotnet/runtime	System.Net.Quic.Functional.Tests.WorkItemExecution	#118957
1167988	dotnet/runtime	System.Net.Quic.Functional.Tests.WorkItemExecution	#120459
1167401	dotnet/runtime	System.Net.Quic.Functional.Tests.WorkItemExecution	#120359
1165105	dotnet/runtime	System.Net.Quic.Functional.Tests.WorkItemExecution	#120375
1153851	dotnet/runtime	System.Net.Quic.Functional.Tests.WorkItemExecution	#98643
1153438	dotnet/runtime	System.Net.Quic.Functional.Tests.WorkItemExecution	#119909
1150243	dotnet/runtime	System.Net.Quic.Functional.Tests.WorkItemExecution	#119793

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
1	3	9

[ManickaP]

It still happens albeit much less than in the past.
Occurs on all platforms, from once to few times a week.
Kusto query:

WorkItems
| where FriendlyName == "System.Net.Quic.Functional.Tests"  and Status == "Timeout"

[dotnet-policy-service]

Tagging subscribers to this area: @dotnet/ncl
See info in area-owners.md if you want to be subscribed.

[MihuBot]

I'm a bot. Here are possible related and/or duplicate issues (I may be wrong):

• [QUIC] [Long Running Test] 'System.Net.Quic.Tests.QuicStreamConformanceTests.ReadWrite_Success' #103482
• System.Net.Quic tests timeout #107761
• [9.0] System.Net.Quic.Tests.QuicStreamConformanceTests.ConcurrentBidirectionalReadsWrites_Success is hanging #107762