This release targets the OpenTelemetry SDK 1.51.0.

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.

Migration notes

• Changes have been made to Tomcat metric definitions provided by JMX Metric Insight component
  • metric http.server.tomcat.errorCount --> tomcat.error.count
    • attribute: name --> tomcat.request.processor.name
    • type: Gauge --> Counter
  • metric http.server.tomcat.requestCount --> tomcat.request.count
    • attribute: name --> tomcat.request.processor.name
    • type: Gauge --> Counter
  • metric http.server.tomcat.maxTime --> tomcat.request.duration.max
    • attribute: name --> tomcat.request.processor.name
    • unit: ms --> s
  • metric http.server.tomcat.processingTime --> tomcat.request.duration.sum
    • attribute: name --> tomcat.request.processor.name
    • unit: ms --> s
  • metric http.server.tomcat.traffic --> tomcat.network.io
    • attribute: name --> tomcat.request.processor.name, direction --> network.io.direction
  • metric http.server.tomcat.sessions.activeSessions --> tomcat.session.active.count
    • attribute: context --> tomcat.context
  • metric http.server.tomcat.threads split into two metrics: tomcat.thread.count and tomcat.thread.busy.count
    • attribute: name --> tomcat.thread.pool.name, state removed

📈 Enhancements

• JMX metrics: require explicit unit in yaml (#13796)
• Remove deprecated methods from runtime-telemetry (#13885)
• ClickHouse JDBC URL support (#13884)
• Support Vert.x HTTP client version 5.0 (#13903)
• Add metric jvm.file_descriptor.count to jvm runtime experimental metrics (#13904)
• Add support for Vert.x SQL client version 5.0 (#13914)
• JMX Metric Insights - improved Tomcat metrics alignment to semconv and added new Tomcat metrics tomcat.session.active.limit and tomcat.thread.limit (#13650)
• Apply method instrumentation only to methods (#13949)
• Apply external annotation instrumentation only to methods (#13948)
• Log start of spring boot starter (#13882)
• Update the OpenTelemetry SDK version to 1.51.0 (#13992)
• Capture finatra code function name (#13939)
• AWS SDK v2 Secrets Manager auto-instrumentation support (#14001)
• AWS SDK v1 Step Functions auto-instrumentation support (#14003)
• Add auto-instrumentation support for AWS Step Functions SDK v2 (#14028)
• Skip propagating context into mysql jdbc cleanup thread (#14060)

🛠️ Bug fixes

• Fix instrumentation failure when constructor has @WithSpan annotation (#13929)
• Fix structured concurrency support on jdk 25 (#13936)
• Fix Spring boot starter fails to load when an OpenTelemetry Bean is supplied (#13972)
• Fix UCP instrumentation scope name (#14029)
• Preload ThreadLocalRandom to avoid java.lang.ClassCircularityError: java/util/concurrent/ThreadLocalRandom (#14030)

🙇 Thank you

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

@breedx-splk @brunobat @copilot-pull-request-reviewer @github-advanced-security @jack-berg @jackshirazi @jaydeluca @jeanbisutti @john-hyun-eb @john9x @JonasKunz @laurit @lukeina2z @PeterF778 @prdoyle @robsunday @schmikei @steverao @SylvainJuge @trask @wl2027 @zeitlinger