Use ParentBasedAlwaysOnSampler by default when OTLP traces export is enabled by mtoffl01 · Pull Request #11225 · DataDog/dd-trace-java

mtoffl01 · 2026-04-28T19:01:19Z

What Does This Do

Selects ParentBasedAlwaysOnSampler in Sampler.Builder.forConfig() when dd.trace.otel.exporter=otlp, replacing AllSampler and RateByServiceTraceSampler. User-configured samplers — RuleBasedTraceSampler (rules / DD_TRACE_SAMPLE_RATE), ForcePrioritySampler (dd.priority.sampling.force), and AsmStandaloneSampler — are preserved.

Motivation

The OpenTelemetry Tracing SDK spec requires that only sampled spans reach the exporter, so the SDK sampler must emit a sampling decision. The upcoming OTLP writer implementation explicitly checks for sampling priority when deciding whether to include a span. Neither of the default-path samplers is suitable on the OTLP path:

AllSampler (priority sampling disabled) doesn't emit a sampling priority — it leaves the trace UNSET, which the upcoming OTLP exporter would discard.
RateByServiceTraceSampler (the default) depends on the Datadog Agent for per-service rate updates, which isn't part of an OTLP-only deployment

Additional Notes

Contributor Checklist

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Update public documentation with any new configuration flags or behaviors

Jira ticket: [PROJ-IDENT]

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…, plus related tests

pr-commenter · 2026-04-28T20:24:16Z

Benchmarks

Startup

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	mtoff/otlp-traces-sampler
git_commit_date	1777386837	1777404762
git_commit_sha	`e6cac64`	`d183f39`
release_version	1.62.0-SNAPSHOT~e6cac64dfd	1.62.0-SNAPSHOT~d183f39a7c

See matching parameters

	Baseline	Candidate
application	insecure-bank	insecure-bank
ci_job_date	1777406643	1777406643
ci_job_id	1639627301	1639627301
ci_pipeline_id	110260074	110260074
cpu_model	Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz
kernel_version	Linux runner-zfyrx7zua-project-304-concurrent-0-51i8mf9t 6.8.0-1031-aws #33~22.04.1-Ubuntu SMP Thu Jun 26 14:22:30 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux	Linux runner-zfyrx7zua-project-304-concurrent-0-51i8mf9t 6.8.0-1031-aws #33~22.04.1-Ubuntu SMP Thu Jun 26 14:22:30 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
module	Agent	Agent
parent	None	None

Summary

Found 0 performance improvements and 0 performance regressions! Performance is the same for 60 metrics, 11 unstable metrics.

Startup time reports for insecure-bank

gantt
title insecure-bank - global startup overhead: candidate=1.62.0-SNAPSHOT~d183f39a7c, baseline=1.62.0-SNAPSHOT~e6cac64dfd
dateFormat X
axisFormat %s
section tracing
Agent [baseline] (1.063 s) : 0, 1062517
Total [baseline] (8.854 s) : 0, 8853566
Agent [candidate] (1.078 s) : 0, 1077859
Total [candidate] (8.871 s) : 0, 8871438
section iast
Agent [baseline] (1.243 s) : 0, 1243074
Total [baseline] (9.528 s) : 0, 9528476
Agent [candidate] (1.245 s) : 0, 1245328
Total [candidate] (9.526 s) : 0, 9525614

baseline results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.063 s	-
Agent	iast	1.243 s	180.557 ms (17.0%)
Total	tracing	8.854 s	-
Total	iast	9.528 s	674.91 ms (7.6%)

candidate results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.078 s	-
Agent	iast	1.245 s	167.469 ms (15.5%)
Total	tracing	8.871 s	-
Total	iast	9.526 s	654.176 ms (7.4%)

gantt
title insecure-bank - break down per module: candidate=1.62.0-SNAPSHOT~d183f39a7c, baseline=1.62.0-SNAPSHOT~e6cac64dfd
dateFormat X
axisFormat %s
section tracing
crashtracking [baseline] (1.235 ms) : 0, 1235
crashtracking [candidate] (1.238 ms) : 0, 1238
BytebuddyAgent [baseline] (634.198 ms) : 0, 634198
BytebuddyAgent [candidate] (644.758 ms) : 0, 644758
AgentMeter [baseline] (29.447 ms) : 0, 29447
AgentMeter [candidate] (29.87 ms) : 0, 29870
GlobalTracer [baseline] (248.437 ms) : 0, 248437
GlobalTracer [candidate] (252.053 ms) : 0, 252053
AppSec [baseline] (32.579 ms) : 0, 32579
AppSec [candidate] (33.187 ms) : 0, 33187
Debugger [baseline] (60.443 ms) : 0, 60443
Debugger [candidate] (60.675 ms) : 0, 60675
Remote Config [baseline] (601.586 µs) : 0, 602
Remote Config [candidate] (619.945 µs) : 0, 620
Telemetry [baseline] (8.36 ms) : 0, 8360
Telemetry [candidate] (10.109 ms) : 0, 10109
Flare Poller [baseline] (11.351 ms) : 0, 11351
Flare Poller [candidate] (9.13 ms) : 0, 9130
section iast
crashtracking [baseline] (1.222 ms) : 0, 1222
crashtracking [candidate] (1.221 ms) : 0, 1221
BytebuddyAgent [baseline] (823.284 ms) : 0, 823284
BytebuddyAgent [candidate] (825.022 ms) : 0, 825022
AgentMeter [baseline] (11.312 ms) : 0, 11312
AgentMeter [candidate] (11.322 ms) : 0, 11322
GlobalTracer [baseline] (237.405 ms) : 0, 237405
GlobalTracer [candidate] (237.491 ms) : 0, 237491
IAST [baseline] (26.592 ms) : 0, 26592
IAST [candidate] (27.548 ms) : 0, 27548
AppSec [baseline] (33.137 ms) : 0, 33137
AppSec [candidate] (32.163 ms) : 0, 32163
Debugger [baseline] (62.427 ms) : 0, 62427
Debugger [candidate] (62.576 ms) : 0, 62576
Remote Config [baseline] (529.143 µs) : 0, 529
Remote Config [candidate] (520.787 µs) : 0, 521
Telemetry [baseline] (7.821 ms) : 0, 7821
Telemetry [candidate] (7.982 ms) : 0, 7982
Flare Poller [baseline] (3.375 ms) : 0, 3375
Flare Poller [candidate] (3.374 ms) : 0, 3374

Startup time reports for petclinic

gantt
title petclinic - global startup overhead: candidate=1.62.0-SNAPSHOT~d183f39a7c, baseline=1.62.0-SNAPSHOT~e6cac64dfd
dateFormat X
axisFormat %s
section tracing
Agent [baseline] (1.064 s) : 0, 1063655
Total [baseline] (11.058 s) : 0, 11058406
Agent [candidate] (1.067 s) : 0, 1066659
Total [candidate] (11.064 s) : 0, 11064093
section appsec
Agent [baseline] (1.27 s) : 0, 1269995
Total [baseline] (11.074 s) : 0, 11073823
Agent [candidate] (1.272 s) : 0, 1271798
Total [candidate] (11.085 s) : 0, 11085473
section iast
Agent [baseline] (1.243 s) : 0, 1243442
Total [baseline] (11.323 s) : 0, 11323284
Agent [candidate] (1.241 s) : 0, 1240984
Total [candidate] (11.267 s) : 0, 11266912
section profiling
Agent [baseline] (1.189 s) : 0, 1188770
Total [baseline] (11.004 s) : 0, 11003637
Agent [candidate] (1.189 s) : 0, 1188562
Total [candidate] (11.019 s) : 0, 11018878

baseline results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.064 s	-
Agent	appsec	1.27 s	206.339 ms (19.4%)
Agent	iast	1.243 s	179.786 ms (16.9%)
Agent	profiling	1.189 s	125.114 ms (11.8%)
Total	tracing	11.058 s	-
Total	appsec	11.074 s	15.417 ms (0.1%)
Total	iast	11.323 s	264.879 ms (2.4%)
Total	profiling	11.004 s	-54.769 ms (-0.5%)

candidate results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.067 s	-
Agent	appsec	1.272 s	205.139 ms (19.2%)
Agent	iast	1.241 s	174.325 ms (16.3%)
Agent	profiling	1.189 s	121.903 ms (11.4%)
Total	tracing	11.064 s	-
Total	appsec	11.085 s	21.38 ms (0.2%)
Total	iast	11.267 s	202.819 ms (1.8%)
Total	profiling	11.019 s	-45.215 ms (-0.4%)

gantt
title petclinic - break down per module: candidate=1.62.0-SNAPSHOT~d183f39a7c, baseline=1.62.0-SNAPSHOT~e6cac64dfd
dateFormat X
axisFormat %s
section tracing
crashtracking [baseline] (1.21 ms) : 0, 1210
crashtracking [candidate] (1.234 ms) : 0, 1234
BytebuddyAgent [baseline] (635.358 ms) : 0, 635358
BytebuddyAgent [candidate] (636.145 ms) : 0, 636145
AgentMeter [baseline] (29.509 ms) : 0, 29509
AgentMeter [candidate] (29.586 ms) : 0, 29586
GlobalTracer [baseline] (248.886 ms) : 0, 248886
GlobalTracer [candidate] (249.845 ms) : 0, 249845
AppSec [baseline] (32.588 ms) : 0, 32588
AppSec [candidate] (33.099 ms) : 0, 33099
Debugger [baseline] (60.419 ms) : 0, 60419
Debugger [candidate] (61.057 ms) : 0, 61057
Remote Config [baseline] (588.955 µs) : 0, 589
Remote Config [candidate] (611.599 µs) : 0, 612
Telemetry [baseline] (9.914 ms) : 0, 9914
Telemetry [candidate] (9.252 ms) : 0, 9252
Flare Poller [baseline] (9.144 ms) : 0, 9144
Flare Poller [candidate] (9.853 ms) : 0, 9853
section appsec
crashtracking [baseline] (1.223 ms) : 0, 1223
crashtracking [candidate] (1.225 ms) : 0, 1225
BytebuddyAgent [baseline] (676.549 ms) : 0, 676549
BytebuddyAgent [candidate] (678.519 ms) : 0, 678519
AgentMeter [baseline] (12.32 ms) : 0, 12320
AgentMeter [candidate] (12.384 ms) : 0, 12384
GlobalTracer [baseline] (250.774 ms) : 0, 250774
GlobalTracer [candidate] (250.772 ms) : 0, 250772
IAST [baseline] (24.87 ms) : 0, 24870
IAST [candidate] (24.832 ms) : 0, 24832
AppSec [baseline] (186.535 ms) : 0, 186535
AppSec [candidate] (185.753 ms) : 0, 185753
Debugger [baseline] (65.263 ms) : 0, 65263
Debugger [candidate] (65.085 ms) : 0, 65085
Remote Config [baseline] (576.687 µs) : 0, 577
Remote Config [candidate] (588.82 µs) : 0, 589
Telemetry [baseline] (7.851 ms) : 0, 7851
Telemetry [candidate] (7.961 ms) : 0, 7961
Flare Poller [baseline] (6.817 ms) : 0, 6817
Flare Poller [candidate] (8.029 ms) : 0, 8029
section iast
crashtracking [baseline] (1.206 ms) : 0, 1206
crashtracking [candidate] (1.209 ms) : 0, 1209
BytebuddyAgent [baseline] (823.033 ms) : 0, 823033
BytebuddyAgent [candidate] (820.949 ms) : 0, 820949
AgentMeter [baseline] (11.268 ms) : 0, 11268
AgentMeter [candidate] (11.27 ms) : 0, 11270
GlobalTracer [baseline] (237.131 ms) : 0, 237131
GlobalTracer [candidate] (237.9 ms) : 0, 237900
IAST [baseline] (27.352 ms) : 0, 27352
IAST [candidate] (26.455 ms) : 0, 26455
AppSec [baseline] (31.487 ms) : 0, 31487
AppSec [candidate] (32.307 ms) : 0, 32307
Debugger [baseline] (64.024 ms) : 0, 64024
Debugger [candidate] (63.079 ms) : 0, 63079
Remote Config [baseline] (523.684 µs) : 0, 524
Remote Config [candidate] (521.345 µs) : 0, 521
Telemetry [baseline] (7.976 ms) : 0, 7976
Telemetry [candidate] (7.966 ms) : 0, 7966
Flare Poller [baseline] (3.407 ms) : 0, 3407
Flare Poller [candidate] (3.364 ms) : 0, 3364
section profiling
crashtracking [baseline] (1.185 ms) : 0, 1185
crashtracking [candidate] (1.176 ms) : 0, 1176
BytebuddyAgent [baseline] (694.248 ms) : 0, 694248
BytebuddyAgent [candidate] (693.435 ms) : 0, 693435
AgentMeter [baseline] (8.928 ms) : 0, 8928
AgentMeter [candidate] (8.903 ms) : 0, 8903
GlobalTracer [baseline] (207.977 ms) : 0, 207977
GlobalTracer [candidate] (207.989 ms) : 0, 207989
AppSec [baseline] (32.76 ms) : 0, 32760
AppSec [candidate] (32.846 ms) : 0, 32846
Debugger [baseline] (65.83 ms) : 0, 65830
Debugger [candidate] (66.165 ms) : 0, 66165
Remote Config [baseline] (580.314 µs) : 0, 580
Remote Config [candidate] (573.962 µs) : 0, 574
Telemetry [baseline] (8.07 ms) : 0, 8070
Telemetry [candidate] (8.097 ms) : 0, 8097
Flare Poller [baseline] (3.538 ms) : 0, 3538
Flare Poller [candidate] (3.6 ms) : 0, 3600
ProfilingAgent [baseline] (94.154 ms) : 0, 94154
ProfilingAgent [candidate] (94.406 ms) : 0, 94406
Profiling [baseline] (94.753 ms) : 0, 94753
Profiling [candidate] (94.957 ms) : 0, 94957

Load

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	mtoff/otlp-traces-sampler
git_commit_date	1777386837	1777404762
git_commit_sha	`e6cac64`	`d183f39`
release_version	1.62.0-SNAPSHOT~e6cac64dfd	1.62.0-SNAPSHOT~d183f39a7c

See matching parameters

	Baseline	Candidate
application	insecure-bank	insecure-bank
ci_job_date	1777407286	1777407286
ci_job_id	1639627302	1639627302
ci_pipeline_id	110260074	110260074
cpu_model	Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz
kernel_version	Linux runner-zfyrx7zua-project-304-concurrent-1-dwmxf28c 6.8.0-1031-aws #33~22.04.1-Ubuntu SMP Thu Jun 26 14:22:30 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux	Linux runner-zfyrx7zua-project-304-concurrent-1-dwmxf28c 6.8.0-1031-aws #33~22.04.1-Ubuntu SMP Thu Jun 26 14:22:30 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux

Summary

Found 0 performance improvements and 1 performance regressions! Performance is the same for 20 metrics, 15 unstable metrics.

scenario	Δ mean agg_http_req_duration_p50	Δ mean agg_http_req_duration_p95	Δ mean throughput	candidate mean agg_http_req_duration_p50	candidate mean agg_http_req_duration_p95	candidate mean throughput	baseline mean agg_http_req_duration_p50	baseline mean agg_http_req_duration_p95	baseline mean throughput
scenario:load:insecure-bank:iast:high_load	worse [+85.075µs; +189.467µs] or [+3.361%; +7.486%]	unsure [+47.684µs; +386.714µs] or [+0.640%; +5.192%]	unstable [-200.818op/s; +108.381op/s] or [-14.412%; +7.778%]	2.668ms	7.666ms	1347.188op/s	2.531ms	7.449ms	1393.406op/s

Request duration reports for insecure-bank

gantt
title insecure-bank - request duration [CI 0.99] : candidate=1.62.0-SNAPSHOT~d183f39a7c, baseline=1.62.0-SNAPSHOT~e6cac64dfd
dateFormat X
axisFormat %s
section baseline
no_agent (1.245 ms) : 1233, 1258
. : milestone, 1245,
iast (3.283 ms) : 3236, 3330
. : milestone, 3283,
iast_FULL (6.055 ms) : 5992, 6118
. : milestone, 6055,
iast_GLOBAL (3.682 ms) : 3622, 3743
. : milestone, 3682,
profiling (2.436 ms) : 2411, 2461
. : milestone, 2436,
tracing (2.013 ms) : 1995, 2031
. : milestone, 2013,
section candidate
no_agent (1.276 ms) : 1263, 1288
. : milestone, 1276,
iast (3.398 ms) : 3351, 3446
. : milestone, 3398,
iast_FULL (6.033 ms) : 5973, 6093
. : milestone, 6033,
iast_GLOBAL (3.651 ms) : 3588, 3714
. : milestone, 3651,
profiling (2.345 ms) : 2321, 2368
. : milestone, 2345,
tracing (1.884 ms) : 1869, 1899
. : milestone, 1884,

baseline results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	1.245 ms [1.233 ms, 1.258 ms]	-
iast	3.283 ms [3.236 ms, 3.33 ms]	2.037 ms (163.6%)
iast_FULL	6.055 ms [5.992 ms, 6.118 ms]	4.809 ms (386.2%)
iast_GLOBAL	3.682 ms [3.622 ms, 3.743 ms]	2.437 ms (195.7%)
profiling	2.436 ms [2.411 ms, 2.461 ms]	1.19 ms (95.6%)
tracing	2.013 ms [1.995 ms, 2.031 ms]	767.692 µs (61.6%)

candidate results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	1.276 ms [1.263 ms, 1.288 ms]	-
iast	3.398 ms [3.351 ms, 3.446 ms]	2.122 ms (166.3%)
iast_FULL	6.033 ms [5.973 ms, 6.093 ms]	4.757 ms (372.8%)
iast_GLOBAL	3.651 ms [3.588 ms, 3.714 ms]	2.375 ms (186.1%)
profiling	2.345 ms [2.321 ms, 2.368 ms]	1.069 ms (83.7%)
tracing	1.884 ms [1.869 ms, 1.899 ms]	607.895 µs (47.6%)

Request duration reports for petclinic

gantt
title petclinic - request duration [CI 0.99] : candidate=1.62.0-SNAPSHOT~d183f39a7c, baseline=1.62.0-SNAPSHOT~e6cac64dfd
dateFormat X
axisFormat %s
section baseline
no_agent (18.233 ms) : 18046, 18419
. : milestone, 18233,
appsec (19.929 ms) : 19724, 20133
. : milestone, 19929,
code_origins (17.583 ms) : 17409, 17758
. : milestone, 17583,
iast (18.015 ms) : 17838, 18192
. : milestone, 18015,
profiling (18.469 ms) : 18282, 18657
. : milestone, 18469,
tracing (17.72 ms) : 17546, 17894
. : milestone, 17720,
section candidate
no_agent (18.27 ms) : 18086, 18454
. : milestone, 18270,
appsec (19.172 ms) : 18975, 19369
. : milestone, 19172,
code_origins (17.677 ms) : 17503, 17851
. : milestone, 17677,
iast (17.934 ms) : 17753, 18115
. : milestone, 17934,
profiling (18.356 ms) : 18174, 18538
. : milestone, 18356,
tracing (17.577 ms) : 17406, 17748
. : milestone, 17577,

baseline results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	18.233 ms [18.046 ms, 18.419 ms]	-
appsec	19.929 ms [19.724 ms, 20.133 ms]	1.696 ms (9.3%)
code_origins	17.583 ms [17.409 ms, 17.758 ms]	-649.417 µs (-3.6%)
iast	18.015 ms [17.838 ms, 18.192 ms]	-217.579 µs (-1.2%)
profiling	18.469 ms [18.282 ms, 18.657 ms]	236.596 µs (1.3%)
tracing	17.72 ms [17.546 ms, 17.894 ms]	-512.404 µs (-2.8%)

candidate results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	18.27 ms [18.086 ms, 18.454 ms]	-
appsec	19.172 ms [18.975 ms, 19.369 ms]	901.758 µs (4.9%)
code_origins	17.677 ms [17.503 ms, 17.851 ms]	-593.289 µs (-3.2%)
iast	17.934 ms [17.753 ms, 18.115 ms]	-336.124 µs (-1.8%)
profiling	18.356 ms [18.174 ms, 18.538 ms]	85.599 µs (0.5%)
tracing	17.577 ms [17.406 ms, 17.748 ms]	-693.371 µs (-3.8%)

Dacapo

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	mtoff/otlp-traces-sampler
git_commit_date	1777386837	1777404762
git_commit_sha	`e6cac64`	`d183f39`
release_version	1.62.0-SNAPSHOT~e6cac64dfd	1.62.0-SNAPSHOT~d183f39a7c

See matching parameters

	Baseline	Candidate
application	biojava	biojava
ci_job_date	1777407062	1777407062
ci_job_id	1639627303	1639627303
ci_pipeline_id	110260074	110260074
cpu_model	Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz
kernel_version	Linux runner-zfyrx7zua-project-304-concurrent-2-kpfrtk6j 6.8.0-1031-aws #33~22.04.1-Ubuntu SMP Thu Jun 26 14:22:30 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux	Linux runner-zfyrx7zua-project-304-concurrent-2-kpfrtk6j 6.8.0-1031-aws #33~22.04.1-Ubuntu SMP Thu Jun 26 14:22:30 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux

Summary

Found 0 performance improvements and 0 performance regressions! Performance is the same for 11 metrics, 1 unstable metrics.

Execution time for tomcat

gantt
title tomcat - execution time [CI 0.99] : candidate=1.62.0-SNAPSHOT~d183f39a7c, baseline=1.62.0-SNAPSHOT~e6cac64dfd
dateFormat X
axisFormat %s
section baseline
no_agent (1.489 ms) : 1477, 1500
. : milestone, 1489,
appsec (3.759 ms) : 3541, 3977
. : milestone, 3759,
iast (2.275 ms) : 2206, 2345
. : milestone, 2275,
iast_GLOBAL (2.319 ms) : 2249, 2390
. : milestone, 2319,
profiling (2.102 ms) : 2048, 2157
. : milestone, 2102,
tracing (2.086 ms) : 2032, 2140
. : milestone, 2086,
section candidate
no_agent (1.487 ms) : 1476, 1499
. : milestone, 1487,
appsec (3.786 ms) : 3566, 4005
. : milestone, 3786,
iast (2.28 ms) : 2210, 2350
. : milestone, 2280,
iast_GLOBAL (2.332 ms) : 2262, 2403
. : milestone, 2332,
profiling (2.103 ms) : 2048, 2158
. : milestone, 2103,
tracing (2.079 ms) : 2026, 2133
. : milestone, 2079,

baseline results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	1.489 ms [1.477 ms, 1.5 ms]	-
appsec	3.759 ms [3.541 ms, 3.977 ms]	2.27 ms (152.5%)
iast	2.275 ms [2.206 ms, 2.345 ms]	786.638 µs (52.8%)
iast_GLOBAL	2.319 ms [2.249 ms, 2.39 ms]	830.479 µs (55.8%)
profiling	2.102 ms [2.048 ms, 2.157 ms]	613.709 µs (41.2%)
tracing	2.086 ms [2.032 ms, 2.14 ms]	596.897 µs (40.1%)

candidate results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	1.487 ms [1.476 ms, 1.499 ms]	-
appsec	3.786 ms [3.566 ms, 4.005 ms]	2.298 ms (154.5%)
iast	2.28 ms [2.21 ms, 2.35 ms]	792.821 µs (53.3%)
iast_GLOBAL	2.332 ms [2.262 ms, 2.403 ms]	845.062 µs (56.8%)
profiling	2.103 ms [2.048 ms, 2.158 ms]	615.478 µs (41.4%)
tracing	2.079 ms [2.026 ms, 2.133 ms]	591.907 µs (39.8%)

Execution time for biojava

gantt
title biojava - execution time [CI 0.99] : candidate=1.62.0-SNAPSHOT~d183f39a7c, baseline=1.62.0-SNAPSHOT~e6cac64dfd
dateFormat X
axisFormat %s
section baseline
no_agent (14.955 s) : 14955000, 14955000
. : milestone, 14955000,
appsec (14.605 s) : 14605000, 14605000
. : milestone, 14605000,
iast (18.381 s) : 18381000, 18381000
. : milestone, 18381000,
iast_GLOBAL (17.81 s) : 17810000, 17810000
. : milestone, 17810000,
profiling (15.429 s) : 15429000, 15429000
. : milestone, 15429000,
tracing (14.839 s) : 14839000, 14839000
. : milestone, 14839000,
section candidate
no_agent (15.551 s) : 15551000, 15551000
. : milestone, 15551000,
appsec (14.801 s) : 14801000, 14801000
. : milestone, 14801000,
iast (18.49 s) : 18490000, 18490000
. : milestone, 18490000,
iast_GLOBAL (17.943 s) : 17943000, 17943000
. : milestone, 17943000,
profiling (15.677 s) : 15677000, 15677000
. : milestone, 15677000,
tracing (14.963 s) : 14963000, 14963000
. : milestone, 14963000,

baseline results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	14.955 s [14.955 s, 14.955 s]	-
appsec	14.605 s [14.605 s, 14.605 s]	-350.0 ms (-2.3%)
iast	18.381 s [18.381 s, 18.381 s]	3.426 s (22.9%)
iast_GLOBAL	17.81 s [17.81 s, 17.81 s]	2.855 s (19.1%)
profiling	15.429 s [15.429 s, 15.429 s]	474.0 ms (3.2%)
tracing	14.839 s [14.839 s, 14.839 s]	-116.0 ms (-0.8%)

candidate results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	15.551 s [15.551 s, 15.551 s]	-
appsec	14.801 s [14.801 s, 14.801 s]	-750.0 ms (-4.8%)
iast	18.49 s [18.49 s, 18.49 s]	2.939 s (18.9%)
iast_GLOBAL	17.943 s [17.943 s, 17.943 s]	2.392 s (15.4%)
profiling	15.677 s [15.677 s, 15.677 s]	126.0 ms (0.8%)
tracing	14.963 s [14.963 s, 14.963 s]	-588.0 ms (-3.8%)

dd-octo-sts · 2026-04-28T20:29:02Z

/merge

gh-worker-devflow-routing-ef8351 · 2026-04-28T20:29:06Z

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2026-04-28 20:29:06 UTC ℹ️ Start processing command /merge

2026-04-28 20:29:11 UTC ℹ️ MergeQueue: pull request added to the queue

The expected merge time in master is approximately 2h (p90).

2026-04-28 22:05:41 UTC ℹ️ MergeQueue: This merge request was merged

Introduce isTraceOtlpExporterEnabled branching logic for Sampler.java…
145f884
…, plus related tests

mtoffl01 added type: feature Enhancements and improvements comp: core Tracer core labels Apr 28, 2026

mtoffl01 marked this pull request as ready for review April 28, 2026 19:05

mtoffl01 requested a review from a team as a code owner April 28, 2026 19:05

mtoffl01 requested a review from mcculls April 28, 2026 19:05

mtoffl01 changed the title ~~Use ParentBasedAlwaysOnSampler when OTLP traces export is enabled~~Use ParentBasedAlwaysOnSampler by default when OTLP traces export is enabledApr 28, 2026

mcculls approved these changes Apr 28, 2026
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Include regression test for UNSET spans in otlp mode
d183f39

mtoffl01 enabled auto-merge April 28, 2026 20:05

mtoffl01 added this pull request to the merge queue Apr 28, 2026

github-merge-queueBot removed this pull request from the merge queue due to failed status checks Apr 28, 2026

gh-worker-dd-mergequeue-cf854dBot merged commit da5e7c3 into masterApr 28, 2026
574 checks passed

gh-worker-dd-mergequeue-cf854dBot deleted the mtoff/otlp-traces-sampler branch April 28, 2026 22:05

github-actionsBot added this to the 1.62.0 milestone Apr 28, 2026

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Use ParentBasedAlwaysOnSampler by default when OTLP traces export is enabled - #11225

Use ParentBasedAlwaysOnSampler by default when OTLP traces export is enabled#11225
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