🍒 12786 - Fix startup deadlock with virtual threads

[amarziali]

Backport #12786 to release/v1.67.x

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-08T12:19:09.090342Z	da32c26	PR opened
🔒 Security Review	✅ Completed 2026-10-08T12:21:05.142509Z	da32c26	PR opened

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[datadog-prod-us1-4]

More details

Preloading VirtualThreadState before instrumentation installation addresses helper loading during virtual-thread mount transitions. The completed static review identified no actionable regressions; runtime behavior was not tested.

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[datadog-prod-us1-4]

🎯 Code Coverage (details)
• Patch Coverage: 100.00%
• Overall Coverage: 68.82% (+9.50%)

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[dd-octo-sts]

🟢 Java Benchmark SLOs — All performance SLOs passed

Suite	Status
Startup	🟢 pass

SLO thresholds are defined here based on automatically generated metrics. A warning is raised when results are within 5% of the threshold.

PR vs. master results

Scenario	Candidate	master	Δ (95% CI of mean)
startup:insecure-bank:iast:Agent	14.01 s	13.91 s	[-0.1%; +1.6%] (no difference)
startup:insecure-bank:tracing:Agent	12.98 s	13.02 s	[-0.9%; +0.3%] (no difference)
startup:petclinic:appsec:Agent	17.30 s	17.14 s	[-0.2%; +2.0%] (no difference)
startup:petclinic:iast:Agent	17.08 s	17.06 s	[-0.7%; +0.9%] (no difference)
startup:petclinic:profiling:Agent	16.57 s	16.88 s	[-2.8%; -0.9%] (maybe better)
startup:petclinic:sca:Agent	17.15 s	16.97 s	[+0.1%; +2.0%] (maybe worse)
startup:petclinic:tracing:Agent	16.21 s	16.29 s	[-1.5%; +0.6%] (no difference)

Commit: da32c267 · CI Pipeline · Benchmarking Platform UI

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Load and DaCapo benchmarks can be triggered manually in the GitLab pipeline. Results will appear in the Benchmarking Platform UI after completion.