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Fix return value on error in delegate instrumentation #6153

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merged 2 commits into from
Oct 16, 2024

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kevingosse
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Summary of changes

In the delegate instrumentation, when the async callback failed, we returned a default value instead of the original value.

Reason for change

The instrumented method probably had a good reason to return that value to begin with.

Implementation details

Just set the value in the catch block.

Test coverage

Added tests to cover the "failure in callback" case.

Also, fixed a flake in the async test (which is actually the reason why I looked at this code to begin with). The tests were relying on the order of execution of the onDelegateEnd/onDelegateAsyncEnd callbacks, but their order is not guaranteed (because onDelegateAsyncEnd is invoked asynchronously and not awaited).

@kevingosse kevingosse requested a review from a team as a code owner October 14, 2024 16:57
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datadog-ddstaging bot commented Oct 14, 2024

Datadog Report

Branch report: kevin/async_func
Commit report: 407940e
Test service: dd-trace-dotnet

✅ 0 Failed, 363916 Passed, 2070 Skipped, 14h 55m 16.96s Total Time

@andrewlock
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Execution-Time Benchmarks Report ⏱️

Execution-time results for samples comparing the following branches/commits:

Execution-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 shown in red. The following thresholds were used for comparing the execution times:

  • Welch test with statistical test for significance of 5%
  • Only results indicating a difference greater than 5% and 5 ms are considered.

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).

gantt
    title Execution time (ms) FakeDbCommand (.NET Framework 4.6.2) 
    dateFormat  X
    axisFormat %s
    todayMarker off
    section Baseline
    This PR (6153) - mean (70ms)  : 68, 72
     .   : milestone, 70,
    master - mean (70ms)  : 68, 72
     .   : milestone, 70,

    section CallTarget+Inlining+NGEN
    This PR (6153) - mean (1,111ms)  : 1091, 1131
     .   : milestone, 1111,
    master - mean (1,110ms)  : 1094, 1127
     .   : milestone, 1110,

Loading
gantt
    title Execution time (ms) FakeDbCommand (.NET Core 3.1) 
    dateFormat  X
    axisFormat %s
    todayMarker off
    section Baseline
    This PR (6153) - mean (109ms)  : 106, 111
     .   : milestone, 109,
    master - mean (109ms)  : 106, 111
     .   : milestone, 109,

    section CallTarget+Inlining+NGEN
    This PR (6153) - mean (768ms)  : 752, 785
     .   : milestone, 768,
    master - mean (769ms)  : 755, 783
     .   : milestone, 769,

Loading
gantt
    title Execution time (ms) FakeDbCommand (.NET 6) 
    dateFormat  X
    axisFormat %s
    todayMarker off
    section Baseline
    This PR (6153) - mean (92ms)  : 90, 95
     .   : milestone, 92,
    master - mean (92ms)  : 89, 95
     .   : milestone, 92,

    section CallTarget+Inlining+NGEN
    This PR (6153) - mean (724ms)  : 709, 740
     .   : milestone, 724,
    master - mean (744ms)  : 657, 831
     .   : milestone, 744,

Loading
gantt
    title Execution time (ms) HttpMessageHandler (.NET Framework 4.6.2) 
    dateFormat  X
    axisFormat %s
    todayMarker off
    section Baseline
    This PR (6153) - mean (190ms)  : 186, 194
     .   : milestone, 190,
    master - mean (189ms)  : 187, 191
     .   : milestone, 189,

    section CallTarget+Inlining+NGEN
    This PR (6153) - mean (1,195ms)  : 1170, 1220
     .   : milestone, 1195,
    master - mean (1,200ms)  : 1174, 1225
     .   : milestone, 1200,

Loading
gantt
    title Execution time (ms) HttpMessageHandler (.NET Core 3.1) 
    dateFormat  X
    axisFormat %s
    todayMarker off
    section Baseline
    This PR (6153) - mean (275ms)  : 270, 280
     .   : milestone, 275,
    master - mean (276ms)  : 272, 281
     .   : milestone, 276,

    section CallTarget+Inlining+NGEN
    This PR (6153) - mean (938ms)  : 922, 954
     .   : milestone, 938,
    master - mean (939ms)  : 920, 957
     .   : milestone, 939,

Loading
gantt
    title Execution time (ms) HttpMessageHandler (.NET 6) 
    dateFormat  X
    axisFormat %s
    todayMarker off
    section Baseline
    This PR (6153) - mean (263ms)  : 259, 267
     .   : milestone, 263,
    master - mean (266ms)  : 258, 273
     .   : milestone, 266,

    section CallTarget+Inlining+NGEN
    This PR (6153) - mean (920ms)  : 898, 941
     .   : milestone, 920,
    master - mean (927ms)  : 908, 946
     .   : milestone, 927,

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Benchmarks Report for tracer 🐌

Benchmarks for #6153 compared to master:

  • 2 benchmarks are slower, with geometric mean 1.132
  • All benchmarks have the same allocations

The following thresholds were used for comparing the benchmark speeds:

  • Mann–Whitney U test with statistical test for significance of 5%
  • Only results indicating a difference greater than 10% and 0.3 ns are considered.

Allocation changes below 0.5% are ignored.

Benchmark details

Benchmarks.Trace.ActivityBenchmark - Same speed ✔️ Same allocations ✔️

Raw results

Branch Method Toolchain Mean StdError StdDev Gen 0 Gen 1 Gen 2 Allocated
master StartStopWithChild net6.0 7.83μs 45ns 334ns 0.0174 0.0087 0 5.42 KB
master StartStopWithChild netcoreapp3.1 10.2μs 55.6ns 324ns 0.015 0.00501 0 5.62 KB
master StartStopWithChild net472 16.4μs 47.8ns 185ns 1.03 0.318 0.106 6.07 KB
#6153 StartStopWithChild net6.0 7.78μs 44ns 330ns 0.0197 0.00789 0 5.42 KB
#6153 StartStopWithChild netcoreapp3.1 10.1μs 31.1ns 116ns 0.0196 0.0098 0 5.62 KB
#6153 StartStopWithChild net472 17μs 68.2ns 264ns 1.02 0.306 0.0994 6.07 KB
Benchmarks.Trace.AgentWriterBenchmark - Same speed ✔️ Same allocations ✔️

Raw results

Branch Method Toolchain Mean StdError StdDev Gen 0 Gen 1 Gen 2 Allocated
master WriteAndFlushEnrichedTraces net6.0 468μs 278ns 1.04μs 0 0 0 2.7 KB
master WriteAndFlushEnrichedTraces netcoreapp3.1 643μs 306ns 1.18μs 0 0 0 2.7 KB
master WriteAndFlushEnrichedTraces net472 845μs 630ns 2.44μs 0.419 0 0 3.3 KB
#6153 WriteAndFlushEnrichedTraces net6.0 468μs 573ns 2.22μs 0 0 0 2.7 KB
#6153 WriteAndFlushEnrichedTraces netcoreapp3.1 635μs 331ns 1.28μs 0 0 0 2.7 KB
#6153 WriteAndFlushEnrichedTraces net472 845μs 551ns 2.14μs 0.419 0 0 3.3 KB
Benchmarks.Trace.AspNetCoreBenchmark - Same speed ✔️ Same allocations ✔️

Raw results

Branch Method Toolchain Mean StdError StdDev Gen 0 Gen 1 Gen 2 Allocated
master SendRequest net6.0 199μs 1.16μs 11μs 0.193 0 0 18.45 KB
master SendRequest netcoreapp3.1 223μs 1.3μs 12μs 0.214 0 0 20.61 KB
master SendRequest net472 0ns 0ns 0ns 0 0 0 0 b
#6153 SendRequest net6.0 194μs 1.12μs 8.87μs 0.195 0 0 18.45 KB
#6153 SendRequest netcoreapp3.1 219μs 1.22μs 7.42μs 0.217 0 0 20.61 KB
#6153 SendRequest net472 0.00069ns 0.000268ns 0.000928ns 0 0 0 0 b
Benchmarks.Trace.CIVisibilityProtocolWriterBenchmark - Same speed ✔️ Same allocations ✔️

Raw results

Branch Method Toolchain Mean StdError StdDev Gen 0 Gen 1 Gen 2 Allocated
master WriteAndFlushEnrichedTraces net6.0 560μs 2.74μs 12.6μs 0.556 0 0 41.45 KB
master WriteAndFlushEnrichedTraces netcoreapp3.1 679μs 3.72μs 21.7μs 0.336 0 0 41.65 KB
master WriteAndFlushEnrichedTraces net472 892μs 3.6μs 14μs 8.09 2.25 0.45 53.29 KB
#6153 WriteAndFlushEnrichedTraces net6.0 555μs 2.77μs 12.4μs 0.543 0 0 41.57 KB
#6153 WriteAndFlushEnrichedTraces netcoreapp3.1 667μs 1.62μs 6.07μs 0.332 0 0 41.59 KB
#6153 WriteAndFlushEnrichedTraces net472 883μs 3.17μs 12.3μs 8.25 2.6 0.434 53.34 KB
Benchmarks.Trace.DbCommandBenchmark - Same speed ✔️ Same allocations ✔️

Raw results

Branch Method Toolchain Mean StdError StdDev Gen 0 Gen 1 Gen 2 Allocated
master ExecuteNonQuery net6.0 1.26μs 0.998ns 3.87ns 0.0146 0 0 1.02 KB
master ExecuteNonQuery netcoreapp3.1 1.78μs 0.923ns 3.57ns 0.0131 0 0 1.02 KB
master ExecuteNonQuery net472 2.11μs 2.27ns 8.78ns 0.156 0 0 987 B
#6153 ExecuteNonQuery net6.0 1.27μs 1.37ns 4.95ns 0.0146 0 0 1.02 KB
#6153 ExecuteNonQuery netcoreapp3.1 1.83μs 2ns 7.74ns 0.0137 0 0 1.02 KB
#6153 ExecuteNonQuery net472 2.08μs 1.97ns 7.63ns 0.157 0 0 987 B
Benchmarks.Trace.ElasticsearchBenchmark - Same speed ✔️ Same allocations ✔️

Raw results

Branch Method Toolchain Mean StdError StdDev Gen 0 Gen 1 Gen 2 Allocated
master CallElasticsearch net6.0 1.16μs 1.26ns 4.9ns 0.0133 0 0 976 B
master CallElasticsearch netcoreapp3.1 1.52μs 0.803ns 3.11ns 0.0133 0 0 976 B
master CallElasticsearch net472 2.47μs 2.06ns 7.96ns 0.158 0 0 995 B
master CallElasticsearchAsync net6.0 1.34μs 0.857ns 3.32ns 0.0134 0 0 952 B
master CallElasticsearchAsync netcoreapp3.1 1.63μs 0.472ns 1.77ns 0.0141 0 0 1.02 KB
master CallElasticsearchAsync net472 2.73μs 1.57ns 6.09ns 0.166 0 0 1.05 KB
#6153 CallElasticsearch net6.0 1.24μs 0.682ns 2.64ns 0.0137 0 0 976 B
#6153 CallElasticsearch netcoreapp3.1 1.55μs 0.545ns 1.97ns 0.0132 0 0 976 B
#6153 CallElasticsearch net472 2.43μs 1.63ns 6.12ns 0.157 0 0 995 B
#6153 CallElasticsearchAsync net6.0 1.23μs 0.468ns 1.69ns 0.013 0 0 952 B
#6153 CallElasticsearchAsync netcoreapp3.1 1.56μs 0.866ns 3.12ns 0.014 0 0 1.02 KB
#6153 CallElasticsearchAsync net472 2.55μs 2.32ns 8.99ns 0.166 0 0 1.05 KB
Benchmarks.Trace.GraphQLBenchmark - Same speed ✔️ Same allocations ✔️

Raw results

Branch Method Toolchain Mean StdError StdDev Gen 0 Gen 1 Gen 2 Allocated
master ExecuteAsync net6.0 1.27μs 1.51ns 5.86ns 0.0131 0 0 952 B
master ExecuteAsync netcoreapp3.1 1.61μs 0.606ns 2.35ns 0.0129 0 0 952 B
master ExecuteAsync net472 1.73μs 0.91ns 3.41ns 0.145 0 0 915 B
#6153 ExecuteAsync net6.0 1.33μs 0.797ns 2.98ns 0.0133 0 0 952 B
#6153 ExecuteAsync netcoreapp3.1 1.58μs 2.22ns 8.58ns 0.0126 0 0 952 B
#6153 ExecuteAsync net472 1.78μs 1.3ns 5.05ns 0.145 0 0 915 B
Benchmarks.Trace.HttpClientBenchmark - Same speed ✔️ Same allocations ✔️

Raw results

Branch Method Toolchain Mean StdError StdDev Gen 0 Gen 1 Gen 2 Allocated
master SendAsync net6.0 4.16μs 1.24ns 4.65ns 0.0311 0 0 2.22 KB
master SendAsync netcoreapp3.1 5.11μs 2.7ns 10.5ns 0.0359 0 0 2.76 KB
master SendAsync net472 7.89μs 2.34ns 9.08ns 0.497 0 0 3.15 KB
#6153 SendAsync net6.0 4.21μs 5.9ns 22.8ns 0.0295 0 0 2.22 KB
#6153 SendAsync netcoreapp3.1 5.09μs 2.25ns 8.42ns 0.036 0 0 2.76 KB
#6153 SendAsync net472 7.71μs 2.53ns 9.79ns 0.498 0 0 3.15 KB
Benchmarks.Trace.ILoggerBenchmark - Same speed ✔️ Same allocations ✔️

Raw results

Branch Method Toolchain Mean StdError StdDev Gen 0 Gen 1 Gen 2 Allocated
master EnrichedLog net6.0 1.46μs 1.4ns 5.61ns 0.0232 0 0 1.64 KB
master EnrichedLog netcoreapp3.1 2.34μs 1.91ns 7.38ns 0.0221 0 0 1.64 KB
master EnrichedLog net472 2.7μs 1.56ns 6.05ns 0.249 0 0 1.57 KB
#6153 EnrichedLog net6.0 1.52μs 2.11ns 8.16ns 0.0233 0 0 1.64 KB
#6153 EnrichedLog netcoreapp3.1 2.29μs 3ns 11.6ns 0.0219 0 0 1.64 KB
#6153 EnrichedLog net472 2.55μs 0.602ns 2.25ns 0.25 0 0 1.57 KB
Benchmarks.Trace.Log4netBenchmark - Same speed ✔️ Same allocations ✔️

Raw results

Branch Method Toolchain Mean StdError StdDev Gen 0 Gen 1 Gen 2 Allocated
master EnrichedLog net6.0 118μs 215ns 834ns 0 0 0 4.28 KB
master EnrichedLog netcoreapp3.1 122μs 184ns 712ns 0 0 0 4.28 KB
master EnrichedLog net472 153μs 127ns 491ns 0.686 0.229 0 4.46 KB
#6153 EnrichedLog net6.0 116μs 138ns 535ns 0.0583 0 0 4.28 KB
#6153 EnrichedLog netcoreapp3.1 122μs 141ns 547ns 0 0 0 4.28 KB
#6153 EnrichedLog net472 152μs 139ns 538ns 0.686 0.229 0 4.46 KB
Benchmarks.Trace.NLogBenchmark - Same speed ✔️ Same allocations ✔️

Raw results

Branch Method Toolchain Mean StdError StdDev Gen 0 Gen 1 Gen 2 Allocated
master EnrichedLog net6.0 2.95μs 1.03ns 3.71ns 0.031 0 0 2.2 KB
master EnrichedLog netcoreapp3.1 4.15μs 1.69ns 6.54ns 0.0291 0 0 2.2 KB
master EnrichedLog net472 4.72μs 1.17ns 4.53ns 0.32 0 0 2.02 KB
#6153 EnrichedLog net6.0 2.92μs 1.41ns 5.45ns 0.0307 0 0 2.2 KB
#6153 EnrichedLog netcoreapp3.1 4.14μs 3ns 11.6ns 0.029 0 0 2.2 KB
#6153 EnrichedLog net472 4.86μs 0.91ns 3.4ns 0.321 0 0 2.02 KB
Benchmarks.Trace.RedisBenchmark - Same speed ✔️ Same allocations ✔️

Raw results

Branch Method Toolchain Mean StdError StdDev Gen 0 Gen 1 Gen 2 Allocated
master SendReceive net6.0 1.42μs 0.882ns 3.3ns 0.0156 0 0 1.14 KB
master SendReceive netcoreapp3.1 1.69μs 1.03ns 3.57ns 0.0153 0 0 1.14 KB
master SendReceive net472 2.19μs 1.56ns 6.03ns 0.183 0.00109 0 1.16 KB
#6153 SendReceive net6.0 1.39μs 0.564ns 2.19ns 0.0159 0 0 1.14 KB
#6153 SendReceive netcoreapp3.1 1.8μs 1.2ns 4.65ns 0.0153 0 0 1.14 KB
#6153 SendReceive net472 1.99μs 0.629ns 2.27ns 0.183 0 0 1.16 KB
Benchmarks.Trace.SerilogBenchmark - Same speed ✔️ Same allocations ✔️

Raw results

Branch Method Toolchain Mean StdError StdDev Gen 0 Gen 1 Gen 2 Allocated
master EnrichedLog net6.0 2.73μs 1.15ns 4.15ns 0.0221 0 0 1.6 KB
master EnrichedLog netcoreapp3.1 3.88μs 1.74ns 6.49ns 0.0214 0 0 1.65 KB
master EnrichedLog net472 4.28μs 2.92ns 11.3ns 0.323 0 0 2.04 KB
#6153 EnrichedLog net6.0 2.75μs 0.811ns 3.14ns 0.022 0 0 1.6 KB
#6153 EnrichedLog netcoreapp3.1 3.96μs 0.738ns 2.76ns 0.0218 0 0 1.65 KB
#6153 EnrichedLog net472 4.37μs 1.82ns 6.81ns 0.323 0 0 2.04 KB
Benchmarks.Trace.SpanBenchmark - Slower ⚠️ Same allocations ✔️

Slower ⚠️ in #6153

Benchmark diff/base Base Median (ns) Diff Median (ns) Modality
Benchmarks.Trace.SpanBenchmark.StartFinishScope‑net6.0 1.138 480.77 546.89
Benchmarks.Trace.SpanBenchmark.StartFinishSpan‑netcoreapp3.1 1.127 552.20 622.46

Raw results

Branch Method Toolchain Mean StdError StdDev Gen 0 Gen 1 Gen 2 Allocated
master StartFinishSpan net6.0 394ns 0.178ns 0.667ns 0.00815 0 0 576 B
master StartFinishSpan netcoreapp3.1 552ns 0.411ns 1.48ns 0.00778 0 0 576 B
master StartFinishSpan net472 774ns 0.569ns 2.2ns 0.0915 0 0 578 B
master StartFinishScope net6.0 481ns 0.221ns 0.825ns 0.00986 0 0 696 B
master StartFinishScope netcoreapp3.1 733ns 1.4ns 5.43ns 0.00935 0 0 696 B
master StartFinishScope net472 947ns 0.751ns 2.91ns 0.104 0 0 658 B
#6153 StartFinishSpan net6.0 408ns 0.188ns 0.726ns 0.00819 0 0 576 B
#6153 StartFinishSpan netcoreapp3.1 622ns 0.258ns 0.967ns 0.00759 0 0 576 B
#6153 StartFinishSpan net472 754ns 0.511ns 1.98ns 0.0916 0 0 578 B
#6153 StartFinishScope net6.0 547ns 0.228ns 0.881ns 0.00985 0 0 696 B
#6153 StartFinishScope netcoreapp3.1 797ns 0.53ns 2.05ns 0.0092 0 0 696 B
#6153 StartFinishScope net472 882ns 0.736ns 2.85ns 0.104 0 0 658 B
Benchmarks.Trace.TraceAnnotationsBenchmark - Same speed ✔️ Same allocations ✔️

Raw results

Branch Method Toolchain Mean StdError StdDev Gen 0 Gen 1 Gen 2 Allocated
master RunOnMethodBegin net6.0 662ns 0.373ns 1.44ns 0.00994 0 0 696 B
master RunOnMethodBegin netcoreapp3.1 927ns 0.475ns 1.84ns 0.00924 0 0 696 B
master RunOnMethodBegin net472 1.13μs 0.284ns 0.984ns 0.104 0 0 658 B
#6153 RunOnMethodBegin net6.0 624ns 0.522ns 1.95ns 0.00985 0 0 696 B
#6153 RunOnMethodBegin netcoreapp3.1 931ns 0.425ns 1.65ns 0.00958 0 0 696 B
#6153 RunOnMethodBegin net472 1.14μs 0.721ns 2.79ns 0.104 0 0 658 B

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Oh great catch, I missed that one. Thanks for the fix

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Throughput/Crank Report ⚡

Throughput results for AspNetCoreSimpleController comparing the following branches/commits:

Cases where throughput results for the PR are worse than latest master (5% drop or greater), results are shown in red.

Note that these results are based on a single point-in-time result for each branch. For full results, see one of the many, many dashboards!

gantt
    title Throughput Linux x64 (Total requests) 
    dateFormat  X
    axisFormat %s
    section Baseline
    This PR (6153) (11.146M)   : 0, 11145781
    master (11.137M)   : 0, 11137140
    benchmarks/2.9.0 (11.081M)   : 0, 11080577

    section Automatic
    This PR (6153) (7.302M)   : 0, 7301913
    master (7.371M)   : 0, 7370758
    benchmarks/2.9.0 (7.732M)   : 0, 7732233

    section Trace stats
    master (7.797M)   : 0, 7797307

    section Manual
    master (11.111M)   : 0, 11110541

    section Manual + Automatic
    This PR (6153) (6.664M)   : 0, 6664314
    master (6.715M)   : 0, 6715013

    section DD_TRACE_ENABLED=0
    master (10.145M)   : 0, 10144731

Loading
gantt
    title Throughput Linux arm64 (Total requests) 
    dateFormat  X
    axisFormat %s
    section Baseline
    This PR (6153) (9.637M)   : 0, 9637424
    master (9.288M)   : 0, 9287840
    benchmarks/2.9.0 (9.798M)   : 0, 9798067

    section Automatic
    This PR (6153) (6.525M)   : 0, 6525047
    master (6.397M)   : 0, 6396905

    section Trace stats
    master (6.866M)   : 0, 6865601

    section Manual
    master (9.556M)   : 0, 9555874

    section Manual + Automatic
    This PR (6153) (6.005M)   : 0, 6004519
    master (6.065M)   : 0, 6065089

    section DD_TRACE_ENABLED=0
    master (8.502M)   : 0, 8501634

Loading
gantt
    title Throughput Windows x64 (Total requests) 
    dateFormat  X
    axisFormat %s
    section Baseline
    This PR (6153) (10.253M)   : 0, 10253347
    master (10.368M)   : 0, 10368181
    benchmarks/2.9.0 (10.067M)   : 0, 10067315

    section Automatic
    This PR (6153) (6.941M)   : 0, 6941022
    master (6.778M)   : 0, 6777658
    benchmarks/2.9.0 (7.552M)   : 0, 7552193

    section Trace stats
    master (7.515M)   : 0, 7514665

    section Manual
    master (10.210M)   : 0, 10210161

    section Manual + Automatic
    This PR (6153) (6.524M)   : 0, 6523525
    master (6.466M)   : 0, 6466038

    section DD_TRACE_ENABLED=0
    master (9.590M)   : 0, 9589809

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Nice catch 👍

@kevingosse kevingosse merged commit a200693 into master Oct 16, 2024
74 checks passed
@kevingosse kevingosse deleted the kevin/async_func branch October 16, 2024 09:58
@github-actions github-actions bot added this to the vNext-v3 milestone Oct 16, 2024
@andrewlock andrewlock added type:bug area:tracer The core tracer library (Datadog.Trace, does not include OpenTracing, native code, or integrations) area:automatic-instrumentation Automatic instrumentation managed C# code (Datadog.Trace.ClrProfiler.Managed) labels Oct 23, 2024
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3 participants