feat(spring-jakarta): [Queue Instrumentation 3] Add Kafka producer instrumentation

[adinauer]

PR Stack (Queue Instrumentation)

• feat(core): [Queue Instrumentation 1] Add enableQueueTracing option and messaging span data conventions #5250
• feat(samples): [Queue Instrumentation 2] Add Kafka to Spring Boot 3 sample app #5253
• feat(spring-jakarta): [Queue Instrumentation 3] Add Kafka producer instrumentation #5254
• feat(spring-jakarta): [Queue Instrumentation 4] Add Kafka consumer instrumentation #5255
• feat(spring-boot-jakarta): [Queue Instrumentation 5] Add Kafka queue auto-configuration #5256
• test(samples): [Queue Instrumentation 6] Add Kafka queue system tests #5258

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📜 Description

Add Kafka producer instrumentation to sentry-spring-jakarta:

• SentryKafkaProducerWrapper — extends KafkaTemplate, overrides doSend to create queue.publish spans for all send variants. Injects sentry-trace, baggage, and sentry-task-enqueued-time headers into Kafka record headers for distributed tracing and receive latency calculation. Span finishes asynchronously in the CompletableFuture.whenComplete callback.

• SentryKafkaProducerBeanPostProcessor — automatically wraps KafkaTemplate beans in SentryKafkaProducerWrapper. Follows the same pattern as SentryCacheBeanPostProcessor.

Key design decisions:

• Overrides doSend (protected) rather than send(ProducerRecord) because all send variants (send(topic, value), send(topic, key, value), sendDefault(value), etc.) route through observeSend → doSend, not through send(ProducerRecord)
• Header injection is wrapped in its own try/catch so failures never break the send
• Gated behind SentryOptions.isEnableQueueTracing() — no spans created when disabled

💡 Motivation and Context

PR 3 in the Queue Instrumentation stack. Adds the producer-side instrumentation that creates queue.publish spans and injects trace headers for distributed tracing to the consumer side (PR 4).

💚 How did you test it?

• Unit tests for BPP (wrap/skip/no-double-wrap)
• Unit tests for wrapper (header injection, trace origin, span lifecycle)
• ./gradlew :sentry-spring-jakarta:test --tests="*SentryKafkaProducer*" — 8 tests pass

📝 Checklist

• I added GH Issue ID & Linear ID
• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• I updated the wizard if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.

🔮 Next steps

• PR 4: Kafka consumer instrumentation (SentryKafkaRecordInterceptor)
• PR 5: Spring Boot 3 auto-configuration

⚠️ Merge this PR using a merge commit (not squash). Only the collection branch is squash-merged into main.

[github-actions]

Semver Impact of This PR

🟡 Minor (new features)

📋 Changelog Preview

This is how your changes will appear in the changelog.
Entries from this PR are highlighted with a left border (blockquote style).

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New Features ✨

• (core) [Queue Instrumentation 1] Add enableQueueTracing option and messaging span data conventions by adinauer in #5250

• (spring-jakarta) [Queue Instrumentation 3] Add Kafka producer instrumentation by adinauer in #5254

• Add strict trace continuation support by giortzisg in #5136
• Sync file attachments to native by bitsandfoxes in #5211

Internal Changes 🔧

Deps

• Bump requests from 2.32.4 to 2.33.0 in the uv group across 1 directory by dependabot in #5237
• Bump github/codeql-action from 4.32.6 to 4.35.1 by dependabot in #5243

Other

• Add THIRD_PARTY_NOTICES.md for vendored third-party code by markushi in #5186

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_{🤖 This preview updates automatically when you update the PR.}

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	Messages
📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

Generated by 🚫 dangerJS against 5049ffc

[sentry]

Sentry Build Distribution

App Name	App ID	Version	Configuration	Install Page
SDK Size	io.sentry.tests.size	8.37.1 (1)	release	Install Build

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	323.43 ms	384.17 ms	60.73 ms
Size	0 B	0 B	0 B