[ci-scan] Test failure: BasicEventSourceTests.ActivityTracking.StartStopCreatesActivity on Android

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Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1450787
Build error leg or test failing: android-x64 Release AllSubsets_Mono - System.Diagnostics.Tracing.Tests

Error Details

BasicEventSourceTests.ActivityTracking.StartStopCreatesActivity and related ActivityTracking tests fail on Android because the Activity ID remains as all-zeros Guid after EventSource Start/Stop operations. The tests expect a non-empty Activity ID to be generated, but on Android the threading/activity context does not propagate as expected.

[FAIL] BasicEventSourceTests.ActivityTracking.StartStopCreatesActivity
Assert.NotEqual() Failure: Values are equal
Expected: Not 00000000-0000-0000-0000-000000000000
Actual:       00000000-0000-0000-0000-000000000000

[FAIL] BasicEventSourceTests.ActivityTracking.ActivityFlowsAsync
[FAIL] BasicEventSourceTests.ActivityTracking.SetCurrentActivityIdBeforeEventFlowsAsync
[FAIL] BasicEventSourceTests.ActivityTracking.SetCurrentActivityIdAfterEventDoesNotFlowAsync

Error Message

{
  "ErrorMessage": [
    "[FAIL] BasicEventSourceTests.ActivityTracking.StartStopCreatesActivity",
    "Assert.NotEqual() Failure: Values are equal"
  ],
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Impact on platforms

• runtime-extra-platforms (def 154) / android-x64 Release AllSubsets_Mono / Helix queue: android work items / exit code 1
• runtime-extra-platforms (def 154) / android-arm Release AllSubsets_Mono / Helix queue: android work items / exit code 1
• runtime-extra-platforms (def 154) / android-arm64 Release AllSubsets_Mono / Helix queue: android work items / exit code 1
• runtime-extra-platforms (def 154) / android-x86 Release AllSubsets_Mono / Helix queue: android work items / exit code 1

First build it occurred

• Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1449088
• Finished: 2026-06-04T09:47:08Z
• Occurrences in window: 3+ (builds 1449088, 1450787, 1452386)
• Computed within the scanned window; may not be the true origin.

Duplicate search

• ActivityTracking StartStopCreatesActivity label:"Known Build Error" - 0 results
• BasicEventSourceTests ActivityTracking label:"Known Build Error" - 0 results
• StartStopCreatesActivity is:open label:"Known Build Error" - 0 results
• ActivityTracking android EventSource is:open - 1 integrity-filtered result ([tvOS] Test failures in System.Diagnostics.Tracing.Tests #56073, cannot verify)
• is:pr is:open ActivityTracking StartStopCreatesActivity android - 0 results

No existing KBE matches this signature. Related issue #56073 was filtered by integrity policy.

---

Filed by ci-failure-scan, which scans dnceng-public outer-loop pipelines on main and converts stable failures into KBEs and test-disable PRs. Comment here or on the workflow file to suggest changes; ci-failure-scan-feedback reads in-scope feedback daily and opens (or updates) a PR with prompt edits.

Note

🔒 Integrity filter blocked 2 items

The following items were blocked because they don't meet the GitHub integrity level.

• #125436 search_pull_requests: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• #56073 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:

tools:
  github:
    min-integrity: approved  # merged | approved | unapproved | none

Generated by CI Outer-Loop Failure Scanner · ● 51.3M · ◷

Report

Build	Repository	Test	Pull Request
1452872	dotnet/runtime	System.Diagnostics.Tracing.Tests.WorkItemExecution

Summary

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

[dotnet-policy-service]

Tagging subscribers to 'arch-android': @vitek-karas, @simonrozsival, @steveisok, @akoeplinger
See info in area-owners.md if you want to be subscribed.

[dotnet-policy-service]

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