Version 1.21.0

This release targets the OpenTelemetry SDK 1.21.0.

Note that many artifacts have the -alpha suffix attached to their version number, reflecting that they are still alpha quality and will continue to have breaking changes. Please see the VERSIONING.md for more details.

📈 Enhancements

• Remove deprecated HTTP semconv code (#7259)
• Rocketmq 5: set context for async callback (#7238)
• HTTP semconv: filter out default peer/host ports (#7258)
• Allow multiple YAML configuration files for JMX rules (#7284)
• OpenTelemetryDriver better support for native images (#7089)
• Support Spring Kafka 3 (#7271)
• Add instrumentation for opentelemetry-extension-kotlin (#7341)
• Populate messaging.kafka.message.offset in all kafka instrumentations (#7374)
• More flexible cgroupv2 container id parsing (and podman support) (#7361)
• Instrument spring-web 6 & spring-webmvc 6 (#7366)
• Change log4j MapMessage attribute names (#7397)
• Don't call Thread#setContextClassLoader() (#7391)

🛠️ Bug fixes

• Webflux instrumentation doesn't capture http.status_code in some cases (#7251)
• Clean WeakConcurrentMap from background thread (#6240)
• Update gwt rpc span from INTERNAL to SERVER (#7342)
• JMXMetricInsight should log nothing at INFO level (#7367)
• Fix NullPointerException when uri is null (#7387)
• Agent context storage wrapper should not override other wrappers (#7355)
• Do not install GC metrics when GarbageCollectionNotificationInfo is not available (#7405)
• Fix connection pool timeouts unit (#7404)

🧰 Tooling

• Allow disabling muzzle checks for specific methods (#7289)

🙇 Thank you

This release was possible thanks to the following contributors who shared their brilliant ideas and awesome pull requests:

@aaron-ai
@anuraaga
@breedx-splk
@brianmolinaspring
@brunobat
@devnewton
@fmhwong
@Iapetus999
@IcebergXTY
@jack-berg
@jamesylgan
@jkwatson
@laurit
@mateuszrzeszutek
@michalvavrik
@mpeyper
@oleborne
@PeterF778
@theletterf
@trask
@vasireddy99