Add OtlpWriter for OTLP traces export by mtoffl01 · Pull Request #11200 · DataDog/dd-trace-java

mtoffl01 · 2026-04-24T18:51:51Z

What Does This Do

Adds a new OtlpWriter that sends Datadog traces via OTLP -- HTTP/protobuf (default) or gRPC -- to a collector endpoint. This new writer type is auto-selected when OTEL_TRACES_EXPORTER=otlp is set and is otherwise off by default.

New components:

OtlpWriter + OtlpPayloadDispatcher
OTLP branch in WriterFactory driven by Config.getOtlpTraces*() getters
Config plumbing for traceOtelExporter → OtlpWriter selection

Motivation

This PR builds on existing work that serializes Datadog spans in OTLP format by providing an "Otlp" writer mechanism for forwarding the data to a configurable endpoint.

Additional Notes

Much of the code was AI generated but based on a relatively detailed plan that I pre-approved before starting the code generation. This PR passes system tests: DataDog/system-tests#6819

Contributor Checklist

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Update public documentation with any new configuration flags or behaviors

Jira ticket: [PROJ-IDENT]

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pr-commenter · 2026-04-24T19:40:43Z

Benchmarks

Startup

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	mtoff/otlp-writer
git_commit_date	1777386837	1777494220
git_commit_sha	`e6cac64`	`96954d7`
release_version	1.62.0-SNAPSHOT~e6cac64dfd	1.62.0-SNAPSHOT~96954d7d95

See matching parameters

	Baseline	Candidate
application	insecure-bank	insecure-bank
ci_job_date	1777496214	1777496214
ci_job_id	1644281407	1644281407
ci_pipeline_id	110567036	110567036
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-ii05srvb 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-ii05srvb 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 1 performance improvements and 0 performance regressions! Performance is the same for 62 metrics, 8 unstable metrics.

scenario	Δ mean execution_time	candidate mean execution_time	baseline mean execution_time
scenario:startup:insecure-bank:iast:Remote Config	better [-34.496µs; -13.938µs] or [-6.340%; -2.562%]	519.849µs	544.066µs

Startup time reports for insecure-bank

gantt
title insecure-bank - global startup overhead: candidate=1.62.0-SNAPSHOT~96954d7d95, baseline=1.62.0-SNAPSHOT~e6cac64dfd
dateFormat X
axisFormat %s
section tracing
Agent [baseline] (1.065 s) : 0, 1065416
Total [baseline] (8.869 s) : 0, 8868535
Agent [candidate] (1.063 s) : 0, 1062618
Total [candidate] (8.841 s) : 0, 8841085
section iast
Agent [baseline] (1.252 s) : 0, 1252425
Total [baseline] (9.572 s) : 0, 9572141
Agent [candidate] (1.244 s) : 0, 1243831
Total [candidate] (9.508 s) : 0, 9508034

baseline results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.065 s	-
Agent	iast	1.252 s	187.009 ms (17.6%)
Total	tracing	8.869 s	-
Total	iast	9.572 s	703.606 ms (7.9%)

candidate results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.063 s	-
Agent	iast	1.244 s	181.213 ms (17.1%)
Total	tracing	8.841 s	-
Total	iast	9.508 s	666.949 ms (7.5%)

gantt
title insecure-bank - break down per module: candidate=1.62.0-SNAPSHOT~96954d7d95, baseline=1.62.0-SNAPSHOT~e6cac64dfd
dateFormat X
axisFormat %s
section tracing
crashtracking [baseline] (1.23 ms) : 0, 1230
crashtracking [candidate] (1.228 ms) : 0, 1228
BytebuddyAgent [baseline] (635.696 ms) : 0, 635696
BytebuddyAgent [candidate] (634.742 ms) : 0, 634742
AgentMeter [baseline] (29.506 ms) : 0, 29506
AgentMeter [candidate] (29.349 ms) : 0, 29349
GlobalTracer [baseline] (249.993 ms) : 0, 249993
GlobalTracer [candidate] (248.352 ms) : 0, 248352
AppSec [baseline] (33.154 ms) : 0, 33154
AppSec [candidate] (32.814 ms) : 0, 32814
Debugger [baseline] (60.175 ms) : 0, 60175
Debugger [candidate] (59.881 ms) : 0, 59881
Remote Config [baseline] (600.507 µs) : 0, 601
Remote Config [candidate] (599.823 µs) : 0, 600
Telemetry [baseline] (8.391 ms) : 0, 8391
Telemetry [candidate] (12.876 ms) : 0, 12876
Flare Poller [baseline] (10.586 ms) : 0, 10586
Flare Poller [candidate] (6.83 ms) : 0, 6830
section iast
crashtracking [baseline] (1.237 ms) : 0, 1237
crashtracking [candidate] (1.219 ms) : 0, 1219
BytebuddyAgent [baseline] (831.905 ms) : 0, 831905
BytebuddyAgent [candidate] (823.437 ms) : 0, 823437
AgentMeter [baseline] (11.383 ms) : 0, 11383
AgentMeter [candidate] (11.305 ms) : 0, 11305
GlobalTracer [baseline] (237.796 ms) : 0, 237796
GlobalTracer [candidate] (237.853 ms) : 0, 237853
IAST [baseline] (29.122 ms) : 0, 29122
IAST [candidate] (28.331 ms) : 0, 28331
AppSec [baseline] (30.542 ms) : 0, 30542
AppSec [candidate] (31.378 ms) : 0, 31378
Debugger [baseline] (62.432 ms) : 0, 62432
Debugger [candidate] (62.502 ms) : 0, 62502
Remote Config [baseline] (544.066 µs) : 0, 544
Remote Config [candidate] (519.849 µs) : 0, 520
Telemetry [baseline] (7.868 ms) : 0, 7868
Telemetry [candidate] (7.923 ms) : 0, 7923
Flare Poller [baseline] (3.365 ms) : 0, 3365
Flare Poller [candidate] (3.376 ms) : 0, 3376

Startup time reports for petclinic

gantt
title petclinic - global startup overhead: candidate=1.62.0-SNAPSHOT~96954d7d95, baseline=1.62.0-SNAPSHOT~e6cac64dfd
dateFormat X
axisFormat %s
section tracing
Agent [baseline] (1.066 s) : 0, 1066074
Total [baseline] (11.121 s) : 0, 11121337
Agent [candidate] (1.065 s) : 0, 1065381
Total [candidate] (11.021 s) : 0, 11020853
section appsec
Agent [baseline] (1.267 s) : 0, 1266976
Total [baseline] (11.03 s) : 0, 11029960
Agent [candidate] (1.266 s) : 0, 1265815
Total [candidate] (11.092 s) : 0, 11091834
section iast
Agent [baseline] (1.246 s) : 0, 1246261
Total [baseline] (11.27 s) : 0, 11270261
Agent [candidate] (1.246 s) : 0, 1246115
Total [candidate] (11.304 s) : 0, 11303950
section profiling
Agent [baseline] (1.191 s) : 0, 1190647
Total [baseline] (11.032 s) : 0, 11031617
Agent [candidate] (1.195 s) : 0, 1194620
Total [candidate] (10.998 s) : 0, 10998036

baseline results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.066 s	-
Agent	appsec	1.267 s	200.903 ms (18.8%)
Agent	iast	1.246 s	180.187 ms (16.9%)
Agent	profiling	1.191 s	124.573 ms (11.7%)
Total	tracing	11.121 s	-
Total	appsec	11.03 s	-91.378 ms (-0.8%)
Total	iast	11.27 s	148.924 ms (1.3%)
Total	profiling	11.032 s	-89.72 ms (-0.8%)

candidate results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.065 s	-
Agent	appsec	1.266 s	200.434 ms (18.8%)
Agent	iast	1.246 s	180.734 ms (17.0%)
Agent	profiling	1.195 s	129.239 ms (12.1%)
Total	tracing	11.021 s	-
Total	appsec	11.092 s	70.98 ms (0.6%)
Total	iast	11.304 s	283.097 ms (2.6%)
Total	profiling	10.998 s	-22.817 ms (-0.2%)

gantt
title petclinic - break down per module: candidate=1.62.0-SNAPSHOT~96954d7d95, baseline=1.62.0-SNAPSHOT~e6cac64dfd
dateFormat X
axisFormat %s
section tracing
crashtracking [baseline] (1.232 ms) : 0, 1232
crashtracking [candidate] (1.229 ms) : 0, 1229
BytebuddyAgent [baseline] (637.078 ms) : 0, 637078
BytebuddyAgent [candidate] (636.015 ms) : 0, 636015
AgentMeter [baseline] (29.569 ms) : 0, 29569
AgentMeter [candidate] (29.53 ms) : 0, 29530
GlobalTracer [baseline] (249.512 ms) : 0, 249512
GlobalTracer [candidate] (248.607 ms) : 0, 248607
AppSec [baseline] (32.778 ms) : 0, 32778
AppSec [candidate] (32.823 ms) : 0, 32823
Debugger [baseline] (60.861 ms) : 0, 60861
Debugger [candidate] (60.781 ms) : 0, 60781
Remote Config [baseline] (607.716 µs) : 0, 608
Remote Config [candidate] (603.551 µs) : 0, 604
Telemetry [baseline] (8.459 ms) : 0, 8459
Telemetry [candidate] (8.395 ms) : 0, 8395
Flare Poller [baseline] (9.898 ms) : 0, 9898
Flare Poller [candidate] (11.402 ms) : 0, 11402
section appsec
crashtracking [baseline] (1.238 ms) : 0, 1238
crashtracking [candidate] (1.234 ms) : 0, 1234
BytebuddyAgent [baseline] (675.668 ms) : 0, 675668
BytebuddyAgent [candidate] (675.378 ms) : 0, 675378
AgentMeter [baseline] (12.305 ms) : 0, 12305
AgentMeter [candidate] (12.207 ms) : 0, 12207
GlobalTracer [baseline] (249.91 ms) : 0, 249910
GlobalTracer [candidate] (249.37 ms) : 0, 249370
IAST [baseline] (24.849 ms) : 0, 24849
IAST [candidate] (24.659 ms) : 0, 24659
AppSec [baseline] (186.048 ms) : 0, 186048
AppSec [candidate] (185.115 ms) : 0, 185115
Debugger [baseline] (65.17 ms) : 0, 65170
Debugger [candidate] (64.687 ms) : 0, 64687
Remote Config [baseline] (560.943 µs) : 0, 561
Remote Config [candidate] (556.645 µs) : 0, 557
Telemetry [baseline] (7.89 ms) : 0, 7890
Telemetry [candidate] (7.692 ms) : 0, 7692
Flare Poller [baseline] (6.758 ms) : 0, 6758
Flare Poller [candidate] (6.698 ms) : 0, 6698
section iast
crashtracking [baseline] (1.23 ms) : 0, 1230
crashtracking [candidate] (1.219 ms) : 0, 1219
BytebuddyAgent [baseline] (824.746 ms) : 0, 824746
BytebuddyAgent [candidate] (823.326 ms) : 0, 823326
AgentMeter [baseline] (11.331 ms) : 0, 11331
AgentMeter [candidate] (11.277 ms) : 0, 11277
GlobalTracer [baseline] (237.852 ms) : 0, 237852
GlobalTracer [candidate] (238.671 ms) : 0, 238671
IAST [baseline] (29.148 ms) : 0, 29148
IAST [candidate] (31.784 ms) : 0, 31784
AppSec [baseline] (30.448 ms) : 0, 30448
AppSec [candidate] (28.469 ms) : 0, 28469
Debugger [baseline] (63.265 ms) : 0, 63265
Debugger [candidate] (63.401 ms) : 0, 63401
Remote Config [baseline] (523.955 µs) : 0, 524
Remote Config [candidate] (535.83 µs) : 0, 536
Telemetry [baseline] (8.111 ms) : 0, 8111
Telemetry [candidate] (8.002 ms) : 0, 8002
Flare Poller [baseline] (3.476 ms) : 0, 3476
Flare Poller [candidate] (3.449 ms) : 0, 3449
section profiling
crashtracking [baseline] (1.19 ms) : 0, 1190
crashtracking [candidate] (1.184 ms) : 0, 1184
BytebuddyAgent [baseline] (694.309 ms) : 0, 694309
BytebuddyAgent [candidate] (697.518 ms) : 0, 697518
AgentMeter [baseline] (8.932 ms) : 0, 8932
AgentMeter [candidate] (9.019 ms) : 0, 9019
GlobalTracer [baseline] (208.868 ms) : 0, 208868
GlobalTracer [candidate] (209.668 ms) : 0, 209668
AppSec [baseline] (32.856 ms) : 0, 32856
AppSec [candidate] (33.183 ms) : 0, 33183
Debugger [baseline] (66.228 ms) : 0, 66228
Debugger [candidate] (65.984 ms) : 0, 65984
Remote Config [baseline] (585.5 µs) : 0, 585
Remote Config [candidate] (578.476 µs) : 0, 578
Telemetry [baseline] (8.139 ms) : 0, 8139
Telemetry [candidate] (8.259 ms) : 0, 8259
Flare Poller [baseline] (3.576 ms) : 0, 3576
Flare Poller [candidate] (3.537 ms) : 0, 3537
ProfilingAgent [baseline] (94.365 ms) : 0, 94365
ProfilingAgent [candidate] (94.093 ms) : 0, 94093
Profiling [baseline] (94.923 ms) : 0, 94923
Profiling [candidate] (94.649 ms) : 0, 94649

Load

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	mtoff/otlp-writer
git_commit_date	1777386837	1777494220
git_commit_sha	`e6cac64`	`96954d7`
release_version	1.62.0-SNAPSHOT~e6cac64dfd	1.62.0-SNAPSHOT~96954d7d95

See matching parameters

	Baseline	Candidate
application	insecure-bank	insecure-bank
ci_job_date	1777496700	1777496700
ci_job_id	1644281408	1644281408
ci_pipeline_id	110567036	110567036
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-r2o6wg7i 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-r2o6wg7i 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 2 performance improvements and 0 performance regressions! Performance is the same for 17 metrics, 17 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_GLOBAL:high_load	better [-253.716µs; -145.283µs] or [-8.329%; -4.769%]	better [-667.237µs; -249.760µs] or [-7.841%; -2.935%]	unstable [-58.865op/s; +187.490op/s] or [-4.920%; +15.669%]	2.847ms	8.051ms	1260.844op/s	3.046ms	8.509ms	1196.531op/s

Request duration reports for petclinic

gantt
title petclinic - request duration [CI 0.99] : candidate=1.62.0-SNAPSHOT~96954d7d95, baseline=1.62.0-SNAPSHOT~e6cac64dfd
dateFormat X
axisFormat %s
section baseline
no_agent (17.921 ms) : 17738, 18104
. : milestone, 17921,
appsec (18.75 ms) : 18560, 18939
. : milestone, 18750,
code_origins (18.009 ms) : 17832, 18186
. : milestone, 18009,
iast (17.91 ms) : 17732, 18088
. : milestone, 17910,
profiling (18.859 ms) : 18669, 19050
. : milestone, 18859,
tracing (18.307 ms) : 18126, 18489
. : milestone, 18307,
section candidate
no_agent (18.148 ms) : 17961, 18336
. : milestone, 18148,
appsec (18.54 ms) : 18355, 18726
. : milestone, 18540,
code_origins (17.949 ms) : 17775, 18124
. : milestone, 17949,
iast (18.141 ms) : 17962, 18320
. : milestone, 18141,
profiling (18.402 ms) : 18217, 18587
. : milestone, 18402,
tracing (18.372 ms) : 18187, 18557
. : milestone, 18372,

baseline results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	17.921 ms [17.738 ms, 18.104 ms]	-
appsec	18.75 ms [18.56 ms, 18.939 ms]	828.665 µs (4.6%)
code_origins	18.009 ms [17.832 ms, 18.186 ms]	87.736 µs (0.5%)
iast	17.91 ms [17.732 ms, 18.088 ms]	-10.706 µs (-0.1%)
profiling	18.859 ms [18.669 ms, 19.05 ms]	938.516 µs (5.2%)
tracing	18.307 ms [18.126 ms, 18.489 ms]	386.385 µs (2.2%)

candidate results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	18.148 ms [17.961 ms, 18.336 ms]	-
appsec	18.54 ms [18.355 ms, 18.726 ms]	392.256 µs (2.2%)
code_origins	17.949 ms [17.775 ms, 18.124 ms]	-198.791 µs (-1.1%)
iast	18.141 ms [17.962 ms, 18.32 ms]	-7.606 µs (-0.0%)
profiling	18.402 ms [18.217 ms, 18.587 ms]	253.744 µs (1.4%)
tracing	18.372 ms [18.187 ms, 18.557 ms]	223.741 µs (1.2%)

Request duration reports for insecure-bank

gantt
title insecure-bank - request duration [CI 0.99] : candidate=1.62.0-SNAPSHOT~96954d7d95, baseline=1.62.0-SNAPSHOT~e6cac64dfd
dateFormat X
axisFormat %s
section baseline
no_agent (1.252 ms) : 1240, 1264
. : milestone, 1252,
iast (3.385 ms) : 3344, 3426
. : milestone, 3385,
iast_FULL (5.921 ms) : 5862, 5980
. : milestone, 5921,
iast_GLOBAL (3.838 ms) : 3772, 3903
. : milestone, 3838,
profiling (2.057 ms) : 2039, 2074
. : milestone, 2057,
tracing (1.962 ms) : 1945, 1978
. : milestone, 1962,
section candidate
no_agent (1.268 ms) : 1255, 1280
. : milestone, 1268,
iast (3.371 ms) : 3326, 3416
. : milestone, 3371,
iast_FULL (5.991 ms) : 5931, 6052
. : milestone, 5991,
iast_GLOBAL (3.637 ms) : 3580, 3694
. : milestone, 3637,
profiling (2.197 ms) : 2174, 2220
. : milestone, 2197,
tracing (1.871 ms) : 1856, 1887
. : milestone, 1871,

baseline results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	1.252 ms [1.24 ms, 1.264 ms]	-
iast	3.385 ms [3.344 ms, 3.426 ms]	2.133 ms (170.4%)
iast_FULL	5.921 ms [5.862 ms, 5.98 ms]	4.669 ms (373.0%)
iast_GLOBAL	3.838 ms [3.772 ms, 3.903 ms]	2.586 ms (206.6%)
profiling	2.057 ms [2.039 ms, 2.074 ms]	804.7 µs (64.3%)
tracing	1.962 ms [1.945 ms, 1.978 ms]	710.109 µs (56.7%)

candidate results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	1.268 ms [1.255 ms, 1.28 ms]	-
iast	3.371 ms [3.326 ms, 3.416 ms]	2.103 ms (165.9%)
iast_FULL	5.991 ms [5.931 ms, 6.052 ms]	4.724 ms (372.7%)
iast_GLOBAL	3.637 ms [3.58 ms, 3.694 ms]	2.369 ms (186.9%)
profiling	2.197 ms [2.174 ms, 2.22 ms]	929.494 µs (73.3%)
tracing	1.871 ms [1.856 ms, 1.887 ms]	603.542 µs (47.6%)

Dacapo

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	mtoff/otlp-writer
git_commit_date	1777386837	1777494220
git_commit_sha	`e6cac64`	`96954d7`
release_version	1.62.0-SNAPSHOT~e6cac64dfd	1.62.0-SNAPSHOT~96954d7d95

See matching parameters

	Baseline	Candidate
application	biojava	biojava
ci_job_date	1777496426	1777496426
ci_job_id	1644281410	1644281410
ci_pipeline_id	110567036	110567036
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-lek1kz4h 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-lek1kz4h 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~96954d7d95, baseline=1.62.0-SNAPSHOT~e6cac64dfd
dateFormat X
axisFormat %s
section baseline
no_agent (1.483 ms) : 1471, 1494
. : milestone, 1483,
appsec (3.823 ms) : 3602, 4045
. : milestone, 3823,
iast (2.269 ms) : 2199, 2339
. : milestone, 2269,
iast_GLOBAL (2.311 ms) : 2241, 2381
. : milestone, 2311,
profiling (2.093 ms) : 2038, 2148
. : milestone, 2093,
tracing (2.074 ms) : 2020, 2127
. : milestone, 2074,
section candidate
no_agent (1.487 ms) : 1475, 1498
. : milestone, 1487,
appsec (3.835 ms) : 3613, 4058
. : milestone, 3835,
iast (2.269 ms) : 2199, 2339
. : milestone, 2269,
iast_GLOBAL (2.314 ms) : 2244, 2384
. : milestone, 2314,
profiling (2.096 ms) : 2042, 2151
. : milestone, 2096,
tracing (2.07 ms) : 2016, 2123
. : milestone, 2070,

baseline results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	1.483 ms [1.471 ms, 1.494 ms]	-
appsec	3.823 ms [3.602 ms, 4.045 ms]	2.341 ms (157.9%)
iast	2.269 ms [2.199 ms, 2.339 ms]	786.404 µs (53.0%)
iast_GLOBAL	2.311 ms [2.241 ms, 2.381 ms]	827.962 µs (55.8%)
profiling	2.093 ms [2.038 ms, 2.148 ms]	610.429 µs (41.2%)
tracing	2.074 ms [2.02 ms, 2.127 ms]	590.855 µs (39.8%)

candidate results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	1.487 ms [1.475 ms, 1.498 ms]	-
appsec	3.835 ms [3.613 ms, 4.058 ms]	2.349 ms (158.0%)
iast	2.269 ms [2.199 ms, 2.339 ms]	782.723 µs (52.7%)
iast_GLOBAL	2.314 ms [2.244 ms, 2.384 ms]	827.061 µs (55.6%)
profiling	2.096 ms [2.042 ms, 2.151 ms]	609.82 µs (41.0%)
tracing	2.07 ms [2.016 ms, 2.123 ms]	583.195 µs (39.2%)

Execution time for biojava

gantt
title biojava - execution time [CI 0.99] : candidate=1.62.0-SNAPSHOT~96954d7d95, baseline=1.62.0-SNAPSHOT~e6cac64dfd
dateFormat X
axisFormat %s
section baseline
no_agent (15.66 s) : 15660000, 15660000
. : milestone, 15660000,
appsec (14.607 s) : 14607000, 14607000
. : milestone, 14607000,
iast (18.429 s) : 18429000, 18429000
. : milestone, 18429000,
iast_GLOBAL (17.747 s) : 17747000, 17747000
. : milestone, 17747000,
profiling (15.633 s) : 15633000, 15633000
. : milestone, 15633000,
tracing (14.753 s) : 14753000, 14753000
. : milestone, 14753000,
section candidate
no_agent (14.928 s) : 14928000, 14928000
. : milestone, 14928000,
appsec (14.714 s) : 14714000, 14714000
. : milestone, 14714000,
iast (18.625 s) : 18625000, 18625000
. : milestone, 18625000,
iast_GLOBAL (17.868 s) : 17868000, 17868000
. : milestone, 17868000,
profiling (14.88 s) : 14880000, 14880000
. : milestone, 14880000,
tracing (14.71 s) : 14710000, 14710000
. : milestone, 14710000,

baseline results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	15.66 s [15.66 s, 15.66 s]	-
appsec	14.607 s [14.607 s, 14.607 s]	-1.053 s (-6.7%)
iast	18.429 s [18.429 s, 18.429 s]	2.769 s (17.7%)
iast_GLOBAL	17.747 s [17.747 s, 17.747 s]	2.087 s (13.3%)
profiling	15.633 s [15.633 s, 15.633 s]	-27.0 ms (-0.2%)
tracing	14.753 s [14.753 s, 14.753 s]	-907.0 ms (-5.8%)

candidate results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	14.928 s [14.928 s, 14.928 s]	-
appsec	14.714 s [14.714 s, 14.714 s]	-214.0 ms (-1.4%)
iast	18.625 s [18.625 s, 18.625 s]	3.697 s (24.8%)
iast_GLOBAL	17.868 s [17.868 s, 17.868 s]	2.94 s (19.7%)
profiling	14.88 s [14.88 s, 14.88 s]	-48.0 ms (-0.3%)
tracing	14.71 s [14.71 s, 14.71 s]	-218.0 ms (-1.5%)

mtoffl01 · 2026-04-27T19:44:42Z

+
+ @Override
+ public void onDroppedTrace(int spanCount) {
+ // TODO: surface drop counts via HealthMetrics


I've purposefully left this out as its not in the current spec

github-actions · 2026-04-27T20:16:29Z

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mcculls

Just one Q about the extra sampling in OtlpPayloadDispatcher (if this is not needed then removing it may help with the E2E test) - and the GRPC signal path needs fixing.

…, plus related tests

…RTER=otlp

mcculls · 2026-04-29T19:21:54Z


 private static void writeSpanTag(
 StreamingBuffer buf, UTF8BytesString key, UTF8BytesString value) {
+ if (value == null) {


This check should be moved to the appropriate caller of writeSpanTag - do you know which call is involved?

For example, like this: https://github.com/DataDog/dd-trace-java/blob/master/dd-trace-core/src/main/java/datadog/trace/core/otlp/trace/OtlpTraceProto.java#L301

I believe its on line 141, for span type:
writeSpanTag(buf, SPAN_TYPE, span.getSpanType());
Because spanType can be null. Should I change this to have an if span.getSpanType() != null prefix, and remove the null checks inside of the writeSpanTag functions?

Yes, thanks - it's the callers responsibility to do the check - that way it's clear in the code which tags are optional and which are mandatory - it also helps avoid masking issues such as when we expect a tag to always have a non-null value and for some reason it doesn't.

mcculls · 2026-04-29T19:22:01Z

 }

 private static void writeSpanTag(StreamingBuffer buf, UTF8BytesString key, CharSequence value) {
+ if (value == null) {


This check should be moved to the appropriate caller of writeSpanTag - do you know which call is involved?

github-actions · 2026-04-29T19:48:19Z

⚠️ New Groovy Test Files Added

The following files add Groovy tests to modules that are candidates for migration to Java / JUnit 5:

dd-trace-core/src/test/groovy/datadog/trace/common/writer/OtlpWriterCombinedTest.groovy (module: dd-trace-core)

Consider writing these tests in Java / JUnit 5 instead to help with the ongoing migration effort.

dd-octo-sts · 2026-04-30T14:32:47Z

/merge

gh-worker-devflow-routing-ef8351 · 2026-04-30T14:32:51Z

View all feedbacks in Devflow UI.

2026-04-30 14:32:51 UTC ℹ️ Start processing command /merge

2026-04-30 14:32:57 UTC ℹ️ MergeQueue: pull request added to the queue

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

2026-04-30 15:51:44 UTC ℹ️ MergeQueue: This merge request was merged

mcculls self-requested a review April 27, 2026 09:27

mcculls reviewed Apr 27, 2026
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Comment threaddd-trace-core/src/main/java/datadog/trace/common/writer/OtlpPayloadDispatcher.java Outdated

mtoffl01 commented Apr 27, 2026
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Comment threaddd-trace-core/src/main/java/datadog/trace/common/writer/OtlpWriter.java

mtoffl01 commented Apr 27, 2026
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Comment threaddd-trace-core/src/main/java/datadog/trace/common/writer/OtlpWriter.java

mtoffl01 commented Apr 27, 2026
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mtoffl01 marked this pull request as ready for review April 27, 2026 20:16

mtoffl01 requested review from a team as code owners April 27, 2026 20:16

mtoffl01 requested review from mcculls and removed request for a teamApril 27, 2026 20:16

mtoffl01 changed the title ~~Implement OTLPWriter~~Add OtlpWriter for OTLP-based trace export Apr 27, 2026

mtoffl01 added the tag: ai generated Largely based on code generated by an AI or LLM label Apr 27, 2026

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Comment threaddd-trace-core/src/main/java/datadog/trace/common/writer/OtlpWriter.java Outdated
Comment threaddd-trace-core/src/main/java/datadog/trace/common/writer/OtlpPayloadDispatcher.java
Comment threaddd-trace-core/src/main/java/datadog/trace/common/writer/OtlpPayloadDispatcher.java Outdated

mtoffl01 added type: feature Enhancements and improvements comp: core Tracer core labels Apr 27, 2026

mtoffl01 changed the title ~~Add OtlpWriter for OTLP-based trace export~~ Add OtlpWriter for OTLP traces export Apr 27, 2026

mcculls reviewed Apr 28, 2026
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Comment threaddd-trace-core/src/main/java/datadog/trace/common/writer/OtlpPayloadDispatcher.java

mcculls reviewed Apr 28, 2026
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Introduce isTraceOtlpExporterEnabled branching logic for Sampler.java…
145f884
…, plus related tests

mtoffl01 changed the base branch from master to mtoff/otlp-traces-samplerApril 28, 2026 19:05

mtoffl01 added 8 commits April 28, 2026 15:32

Include regression test for UNSET spans in otlp mode
d183f39

Create new OTLP writer type, enabled by default when OTEL_TRACES_EXPO…
d69e491
…RTER=otlp

Implement OtlpPayloadDispatcher.java
e7e3a95

Introduce OtlpPayloadDispatcherTest.java
af97659

Implement OtlpWriter
015e272

Introduce OtlpWriterTest.java
8194971

Introduce OtlpWriterCombinedTest.java with a TODO
a5cd8fe

WriterFactory: Add OTLP branch for OtlpWriter; include a TODO for a test
1615566

mtoffl01 added 5 commits April 28, 2026 15:34

nits
46887fe

Implement OtlpWriter tests in WriterFactoryTest
eb2b116

Document problems with OtlpWriterCombinedTest
b02aab1

fill NPE on writeSpanTag
594b4b8

Regression test for UNSET spans in otlp writer mode
491533b

mtoffl01 force-pushed the mtoff/otlp-writer branch from f7b12c1 to 491533bCompare April 28, 2026 19:43

Base automatically changed from mtoff/otlp-traces-sampler to masterApril 28, 2026 22:05

mtoffl01 added 2 commits April 29, 2026 14:16

fix grpc path for OtlpWriter and OtlpSender - plus a regression test
53d53d7

Remove OtlpTraceProtoCollector INSTANCE singleton
edc1081

mtoffl01 requested a review from mcculls April 29, 2026 18:42

mcculls reviewed Apr 29, 2026
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mtoffl01 added 2 commits April 29, 2026 15:27

Implement happy path test in OtlpWriterCombinedTest
5acc0d9

Test the OTLP http request body in OtlpHttpRequestBodyTest
2456c8b

Fix NPE on null span type tag, and add regression test
96954d7

mcculls approved these changes Apr 29, 2026
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mtoffl01 added this pull request to the merge queue Apr 30, 2026

github-merge-queueBot removed this pull request from the merge queue due to failed status checks Apr 30, 2026

mtoffl01 mentioned this pull request Apr 30, 2026
Migrate OtlpWriterCombinedTest from groovy to junit #11245
Merged

gh-worker-dd-mergequeue-cf854dBot merged commit 2caa89f into masterApr 30, 2026
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gh-worker-dd-mergequeue-cf854dBot deleted the mtoff/otlp-writer branch April 30, 2026 15:51

github-actionsBot added this to the 1.62.0 milestone Apr 30, 2026

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