The trace did not contain an AllocationSampled event

[MichalStrehovsky]

The trace did not contain an AllocationSampled event from tracee PID 143427.
Trace file `/datadisks/disk1/work/B0580967/t/tmp6Mh6Fr.nettrace` does not contain expected events.
Tracee PID 143427 had 65 event(s) in the trace:
  Universal.System/ProcessMappingMetadata: 1
  Universal.System/ProcessMapping: 62
  Universal.System/ProcessCreate: 1
  Universal.System/ProcessExit: 1
Return code:      1

Raw output file:      /datadisks/disk1/work/B0580967/w/A6350923/uploads/userevents/basic/basic/output.txt

Raw output:

BEGIN EXECUTION

/datadisks/disk1/work/B0580967/p/nativeaottest.sh /datadisks/disk1/work/B0580967/w/A6350923/e/tracing/userevents/basic/basic/ basic.dll ''

Starting record-trace: sudo -n /datadisks/disk1/work/B0580967/w/A6350923/e/tracing/userevents/common/userevents_common/record-trace --script-file /datadisks/disk1/work/B0580967/w/A6350923/e/tracing/userevents/basic/basic/basic.script --out /datadisks/disk1/work/B0580967/t/tmp6Mh6Fr.nettrace --log-path /datadisks/disk1/work/B0580967/t/tmp6Mh6Fr.log --log-filter one_collect::helpers::dotnet=debug,one_collect::perf_event=debug,one_collect::perf_event::rb=info,one_collect::helpers::exporting::formats::nettrace=debug,one_collect::helpers::exporting::os=warn,ruwind=warn,one_collect::tracefs=warn,one_collect::scripting=warn,engine=warn

record-trace started with PID: 143413

Waiting for record-trace to signal 'Recording started'...

[record-trace][stdout] Recording started.  Press CTRL+C to stop.

Starting tracee process: /datadisks/disk1/work/B0580967/w/A6350923/e/tracing/userevents/basic/basic/native/basic tracee

Tracee process started with PID: 143427

Waiting for tracee process to exit...

[tracee][stdout] Tracee waiting for EventSource to be enabled via IPC...

Tracee process did not exit within the 5000ms timeout, killing it.

Tracee process exited with code 137.

Stopping record-trace with SIGINT.

Waiting for record-trace to exit...

[record-trace][stdout] Recording stopped.

[record-trace][stdout] Resolving symbols.

[record-trace][stdout] Finished recording trace.

[record-trace][stdout] Trace written to /datadisks/disk1/work/B0580967/t/tmp6Mh6Fr.nettrace

Ignored 5458 events from processes other than tracee (PID 143427).

Uploading artifact to Helix work item directory: /datadisks/disk1/work/B0580967/w/A6350923/uploads/basic.nettrace

Uploading artifact to Helix work item directory: /datadisks/disk1/work/B0580967/w/A6350923/uploads/basic.log

Expected: 100

Actual: 255

END EXECUTION - FAILED

Test Harness Exitcode is : 1

To run the test:

Set up CORE_ROOT and run.

> /datadisks/disk1/work/B0580967/w/A6350923/e/tracing/tracing/native/../../userevents/basic/basic/basic.sh

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1602147
Build error leg or test failing: tracing/userevents/basic/basic/basic.cmd
Pull request: #134173

Error Message

DO NOT USE JSON BELOW IF THIS IS A BUILD BREAK otherwise build analysis will allow pull requests to merge that break the build worse. For a build break, do not use this issue form. Make a regular new issue.

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

{
  "ErrorMessage": "The trace did not contain an AllocationSampled event",
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1602147
Error message validated: [The trace did not contain an AllocationSampled event]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 9/23/2026 10:19:22 PM UTC

Report

Build	Repository	Test	Pull Request
1602147	dotnet/runtime	tracing/userevents/basic/basic/basic.cmd	#134173

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
0	0	1

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