[SLES-2826] Reproducing AAS Restart Named Pipe Overlap Issue with Logs [Do Not Merge]#8632
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[SLES-2826] Reproducing AAS Restart Named Pipe Overlap Issue with Logs [Do Not Merge]#8632Lewis-E wants to merge 3 commits into
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…ssification Adds [aas-repro]-prefixed Information/Warning logs at every state transition: init (IIS Worker Process PID, AppDomain, pipe names, agent path), per-iteration 7-retry NeverChecked outcomes, the bad path (never_checked_exhausted), steady- state poll signals, spawned child PID + exit code, and SequentialFailures count. Adds NamedPipeIsBoundDiagnostic/GetMatchingProcessesDiagnostic helpers that log on the TRUE branch (production helpers only log FALSE) and emit full PID@StartTime list from Process.GetProcessesByName so orphan agents are visible. For repro only — not for customer release.
- Wrap int args in new object[] on spawned/start_success log calls to resolve CS0121 (int disambiguates as CallerLineNumber otherwise) - Add #pragma warning disable/restore CA1837 around Process.GetCurrentProcess().Id (warnings-as-errors on net6.0)
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Execution-Time Benchmarks Report ⏱️Execution-time results for samples comparing This PR (8632) and master. ✅ No regressions detected - check the details below Full Metrics ComparisonFakeDbCommand
HttpMessageHandler
Comparison explanationExecution-time benchmarks measure the whole time it takes to execute a program, and are intended to measure the one-off costs. Cases where the execution time results for the PR are worse than latest master results are highlighted in **red**. The following thresholds were used for comparing the execution times:
Note that these results are based on a single point-in-time result for each branch. For full results, see the dashboard. Graphs show the p99 interval based on the mean and StdDev of the test run, as well as the mean value of the run (shown as a diamond below the graph). Duration chartsFakeDbCommand (.NET Framework 4.8)gantt
title Execution time (ms) FakeDbCommand (.NET Framework 4.8)
dateFormat x
axisFormat %Q
todayMarker off
section Baseline
This PR (8632) - mean (74ms) : 70, 77
master - mean (73ms) : 70, 75
section Bailout
This PR (8632) - mean (77ms) : 74, 79
master - mean (79ms) : 75, 83
section CallTarget+Inlining+NGEN
This PR (8632) - mean (1,105ms) : 1053, 1156
master - mean (1,104ms) : 1056, 1153
FakeDbCommand (.NET Core 3.1)gantt
title Execution time (ms) FakeDbCommand (.NET Core 3.1)
dateFormat x
axisFormat %Q
todayMarker off
section Baseline
This PR (8632) - mean (114ms) : 110, 119
master - mean (113ms) : 109, 117
section Bailout
This PR (8632) - mean (114ms) : 112, 116
master - mean (118ms) : 113, 124
section CallTarget+Inlining+NGEN
This PR (8632) - mean (790ms) : 768, 813
master - mean (787ms) : 759, 814
FakeDbCommand (.NET 6)gantt
title Execution time (ms) FakeDbCommand (.NET 6)
dateFormat x
axisFormat %Q
todayMarker off
section Baseline
This PR (8632) - mean (103ms) : 97, 109
master - mean (102ms) : 98, 106
section Bailout
This PR (8632) - mean (104ms) : 99, 109
master - mean (106ms) : 100, 111
section CallTarget+Inlining+NGEN
This PR (8632) - mean (949ms) : 900, 998
master - mean (946ms) : 907, 986
FakeDbCommand (.NET 8)gantt
title Execution time (ms) FakeDbCommand (.NET 8)
dateFormat x
axisFormat %Q
todayMarker off
section Baseline
This PR (8632) - mean (100ms) : 96, 104
master - mean (99ms) : 95, 103
section Bailout
This PR (8632) - mean (104ms) : 98, 111
master - mean (103ms) : 98, 108
section CallTarget+Inlining+NGEN
This PR (8632) - mean (825ms) : 788, 863
master - mean (822ms) : 788, 856
HttpMessageHandler (.NET Framework 4.8)gantt
title Execution time (ms) HttpMessageHandler (.NET Framework 4.8)
dateFormat x
axisFormat %Q
todayMarker off
section Baseline
This PR (8632) - mean (199ms) : 192, 206
master - mean (202ms) : 194, 210
section Bailout
This PR (8632) - mean (203ms) : 197, 209
master - mean (206ms) : 198, 213
section CallTarget+Inlining+NGEN
This PR (8632) - mean (1,204ms) : 1150, 1258
master - mean (1,205ms) : 1159, 1251
HttpMessageHandler (.NET Core 3.1)gantt
title Execution time (ms) HttpMessageHandler (.NET Core 3.1)
dateFormat x
axisFormat %Q
todayMarker off
section Baseline
This PR (8632) - mean (287ms) : 279, 295
master - mean (288ms) : 281, 295
section Bailout
This PR (8632) - mean (289ms) : 283, 295
master - mean (290ms) : 283, 296
section CallTarget+Inlining+NGEN
This PR (8632) - mean (964ms) : 944, 983
master - mean (967ms) : 941, 992
HttpMessageHandler (.NET 6)gantt
title Execution time (ms) HttpMessageHandler (.NET 6)
dateFormat x
axisFormat %Q
todayMarker off
section Baseline
This PR (8632) - mean (282ms) : 277, 287
master - mean (281ms) : 275, 287
section Bailout
This PR (8632) - mean (281ms) : 276, 285
master - mean (280ms) : 275, 285
section CallTarget+Inlining+NGEN
This PR (8632) - mean (1,161ms) : 1117, 1204
master - mean (1,163ms) : 1117, 1208
HttpMessageHandler (.NET 8)gantt
title Execution time (ms) HttpMessageHandler (.NET 8)
dateFormat x
axisFormat %Q
todayMarker off
section Baseline
This PR (8632) - mean (278ms) : 271, 285
master - mean (281ms) : 274, 289
section Bailout
This PR (8632) - mean (281ms) : 274, 288
master - mean (282ms) : 275, 288
section CallTarget+Inlining+NGEN
This PR (8632) - mean (1,048ms) : 1007, 1089
master - mean (1,041ms) : 997, 1085
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When the IIS Worker Process exits, the OS closes its handles, the job object's refcount drops to zero, and Windows kills datadog-trace-agent.exe and dogstatsd.exe automatically. Prevents the orphan failure mode where the agent survives its parent and holds the named pipe indefinitely, locking new IIS Worker Processes out of starting their own agents. Logs [aas-repro] job_object_create and job_object_assign so the behavior is observable in the live repro and in production. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
BenchmarksBenchmark execution time: 2026-05-14 19:03:54 Comparing candidate commit cbb197d in PR branch Some scenarios are present only in baseline or only in candidate runs. If you didn't create or remove some scenarios in your branch, this maybe a sign of crashed benchmarks 💥💥💥 Scenarios present only in baseline:
Found 6 performance improvements and 3 performance regressions! Performance is the same for 47 metrics, 16 unstable metrics, 91 known flaky benchmarks, 35 flaky benchmarks without significant changes.
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Adds [aas-repro]-prefixed Information/Warning logs at every state transition:
init (IIS Worker Process PID, AppDomain, pipe names, agent path), per-iteration
7-retry NeverChecked outcomes, the bad path (never_checked_exhausted), steady-
state poll signals, spawned child PID + exit code, and SequentialFailures count.
Adds NamedPipeIsBoundDiagnostic/GetMatchingProcessesDiagnostic helpers that log
on the TRUE branch (production helpers only log FALSE) and emit full
PID@StartTime list from Process.GetProcessesByName so orphan agents are visible.
For repro only — not for customer release.## Summary of changes
Reason for change
Implementation details
Test coverage
Other details