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[ci-scan] Test failure: AsyncProfilerTests.StateMachineAsync_CallstackStressWithVaryingDepths under libraries-jitstress #129938
Description
Build Information
Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1484168
Build error leg or test failing: windows-x64 Release - System.Threading.Tasks.Tests
Error Details
AsyncProfilerTests.StateMachineAsync_CallstackStressWithVaryingDepths fails under jitstress mode in the runtime-coreclr libraries-jitstress pipeline (def 138). The test expects the async profiler to emit at least 3 buffer flushes, but only 2 are observed under stress conditions.
System.Threading.Tasks.Tests.AsyncProfilerTests.StateMachineAsync_CallstackStressWithVaryingDepths [FAIL]
Expected at least 3 buffer flushes, got 2
----- BEGIN ASYNC EVENTS (CSV) -----
seq,delta,thread,event,disp,parent,frames,unwind
0,0,5056,AsyncProfilerMetadata,0,0,0,0
1,281,5056,ResetAsyncThreadContext,0,0,0,0
2,283,5056,CreateStateMachineAsyncContext,387,0,0,0
...
at AsyncProfilerTests.AssertTrue(EventDump dump, Boolean condition, String message)
at AsyncProfilerTests.StateMachineAsync_CallstackStressWithVaryingDepths()
Error Message
{
"ErrorMessage": ["StateMachineAsync_CallstackStressWithVaryingDepths", "Expected at least 3 buffer flushes"],
"ErrorPattern": "",
"BuildRetry": false,
"ExcludeConsoleLog": false
}Impact on platforms
- runtime-coreclr libraries-jitstress (def 138) / windows-x64 Release / Helix: Windows.10.Amd64.Open
First build it occurred
- Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1482524
- Finished: 2026-06-26T09:19:41Z
- Source and follow-up (build 1484168, Jun 27) both have this failure on windows-x64 Release
Duplicate search
"StateMachineAsync_CallstackStressWithVaryingDepths" label:"Known Build Error"— 0 results"StateMachineAsync_CallstackStressWithVaryingDepths" is:open— 0 results"CallstackStress" OR "buffer flushes" label:"Known Build Error" is:closed closed:>=2026-05-28— 0 results"StateMachineAsync_CallstackStressWithVaryingDepths" is:pr is:merged merged:>=2026-06-20— 0 results
No existing KBE matches this signature.
Related: #129920 (different AsyncProfilerTests failure on runtime-libraries-interpreter)
Filed by ci-failure-scan (detection only). ci-failure-fix walks open [ci-scan] KBEs and either opens a small fix PR or comments here to loop in owners — it never disables the test.
Note
🔒 Integrity filter blocked 4 items
The following items were blocked because they don't meet the GitHub integrity level.
- #129832
search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved". - #129876
search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved". - #114222
search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved". - #117138
search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
To allow these resources, lower min-integrity in your GitHub frontmatter:
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min-integrity: approved # merged | approved | unapproved | noneGenerated by CI Outer-Loop Failure Scanner · ● 101.8M · ◷
Report
Summary
| 24-Hour Hit Count | 7-Day Hit Count | 1-Month Count |
|---|---|---|
| 9 | 56 | 75 |
Activity
VincentBu commentedon Jun 29, 2026
Failed in: runtime-coreclr libraries-jitstress2-jitstressregs 20260627.1
Failed tests:
Error message:
Stack trace:
VincentBu commentedon Jul 6, 2026
Failed in: runtime-coreclr libraries-jitstress2-jitstressregs 20260704.1
Failed tests:
Error message:
Stack trace:
JulieLeeMSFT commentedon Jul 7, 2026
@steveisok, this is a high impact failure. PTAL.
dotnet-policy-service commentedon Jul 7, 2026
Tagging subscribers to this area: @steveisok, @tommcdon, @dotnet/dotnet-diag
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lateralusX commentedon Jul 8, 2026
Relaxing test in #130337 since buffer flush count depends on workload + thread scheduling that is indeterministic across all CI legs.
Fix flaky StateMachineAsync_CallstackStressWithVaryingDepths test. (d…
Fix flaky StateMachineAsync_CallstackStressWithVaryingDepths test. (#…