feat(spring): [Queue Instrumentation 40] Add Spring Boot 4 Kafka tracing

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PR Stack (Queue Instrumentation)

• feat(core): Queue Instrumentation #5249
• 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 #5259
• test(samples): [Queue Instrumentation 6] Add Kafka queue system tests #5260
• feat(samples): [Queue Instrumentation 7] Add Kafka to Spring Boot 3 OTel sample apps #5265
• fix(spring-boot-jakarta): [Queue Instrumentation 8] Disable Sentry Kafka spans when OTel is active #5274
• fix(spring-jakarta): [Queue Instrumentation 9] Clean up stale ThreadLocal context in Kafka consumer interceptor #5279
• fix(spring-jakarta): [Queue Instrumentation 10] Fork root scopes and skip when OTel is active in Kafka consumer #5280
• fix(spring-jakarta): [Queue Instrumentation 11] Guard entire span lifecycle in Kafka producer interceptor #5281
• fix(spring-jakarta): [Queue Instrumentation 12] Add Kafka retry count attribute #5282
• fix(spring-jakarta): [Queue Instrumentation 13] Align enqueue time with Python #5283
• ref(kafka): [Queue Instrumentation 14] Extract sentry-kafka module #5288
• feat(samples): [Queue Instrumentation 15] Add opt-in Kafka console e2e coverage #5289
• fix(test): [Queue Instrumentation 16] Enable Kafka profile in system runner #5291
• feat(kafka): [Queue Instrumentation 17] Add manual consumer tracing helper #5312
• ref(samples): [Queue Instrumentation 18] Move Kafka sources into queues.kafka package #5313
• ref(samples): [Queue Instrumentation 19] Drop Kafka auto-config exclude from Spring Boot samples #5314
• ref(kafka): [Queue Instrumentation 20] Log Kafka instrumentation failures #5315
• fix(kafka): [Queue Instrumentation 21] Preserve third-party baggage on Kafka producer records #5316
• test(spring-boot-jakarta): [Queue Instrumentation 22] Cover spring-kafka class-absence gate #5318
• fix(spring-jakarta): [Queue Instrumentation 23] Install Kafka context before trace setup #5319
• fix(kafka): [Queue Instrumentation 24] Read all baggage headers on consumers #5320
• fix(kafka): [Queue Instrumentation 25] Finish producer spans on failures #5321
• fix(kafka): [Queue Instrumentation 26] Mark producer interceptor experimental #5322
• fix(spring-jakarta): [Queue Instrumentation 27] Delegate Kafka record thread-state hooks #5323
• test(samples): [Queue Instrumentation 28] Cover OTel Jakarta Kafka coexistence in CI #5324
• fix(spring-jakarta): [Queue Instrumentation 29] Set body_size on Spring Kafka consumer transaction #5325
• test(spring-jakarta): [Queue Instrumentation 30] Cover Kafka record interceptor lifecycle edge cases #5327
• fix(kafka): [Queue Instrumentation 31] Write enqueued-time header as plain decimal #5328
• test(spring-boot-jakarta): [Queue Instrumentation 32] Filter OTel in Kafka auto-config negative tests #5330
• fix(otel): [Queue Instrumentation 34] Fix OTel messaging span mapping correctness #5337
• fix(kafka): [Queue Instrumentation 35] Inject trace headers without real active span #5338
• fix(kafka): [Queue Instrumentation 36] Avoid dropping customer interceptor #5341
• fix(spring-boot-jakarta): [Queue Instrumentation 37] Skip Kafka autoconfig for OTel agent #5343
• fix(spring-jakarta): [Queue Instrumentation 38] Close leaked Kafka interceptor scope #5345
• fix(test): [Queue Instrumentation 39] Remove stale Kafka container before startup #5347
• feat(spring): [Queue Instrumentation 40] Add Spring Boot 4 Kafka tracing #5348

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📜 Description

Ports the Spring Boot 3 Kafka queue tracing stack changes to Spring Boot 4 as one PR.

This adds Spring Kafka support to the Spring 7 module, wires it into the Spring Boot 4 auto-configuration, and adds Boot 4 sample/system-test coverage for the regular, OTel agent, and OTel no-agent samples.

💡 Motivation and Context

The queue instrumentation stack added Kafka tracing for Spring Boot 3. Spring Boot 4 uses the Spring 7 module, so it needs the same Kafka producer/consumer bean post-processors and auto-configuration in the Boot 4 integration.

💚 How did you test it?

• ./gradlew spotlessApply apiDump
• ./gradlew :sentry-spring-7:test --tests '*Kafka*' :sentry-spring-boot-4:test --tests '*Kafka*'
• ./gradlew :sentry-samples:sentry-samples-spring-boot-4:compileJava :sentry-samples:sentry-samples-spring-boot-4:compileTestKotlin :sentry-samples:sentry-samples-spring-boot-4-opentelemetry:compileJava :sentry-samples:sentry-samples-spring-boot-4-opentelemetry:compileTestKotlin :sentry-samples:sentry-samples-spring-boot-4-opentelemetry-noagent:compileJava :sentry-samples:sentry-samples-spring-boot-4-opentelemetry-noagent:compileTestKotlin
• python3 -m py_compile test/system-test-runner.py

📝 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

None.

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

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Android

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

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	Plain	With Sentry	Diff
Startup time	323.42 ms	368.73 ms	45.31 ms
Size	0 B	0 B	0 B