OpenTelemetry Java Flight Recorder (JFR) Events

Create JFR events that can be recorded and viewed in Java Mission Control (JMC).

• Creates Open Telemetry Tracing/Span events for spans
  • The thread and stacktrace will be of the thread ending the span, which might be different from the thread creating the span.
  • Has the fields
    • Operation Name (@Contextual)
    • Trace ID
    • Parent Span ID
    • Span ID
• Creates Open Telemetry Tracing/Scope events for scopes
  • Thread will match the thread the scope was active in and the stacktrace will be when scope was closed
  • Multiple scopes might be collected for a single span
  • Has the fields
    • Trace ID (@Contextual)
    • Span ID
• Supports the Open Source version of JFR in Java 11.
  • Might support back port to OpenJDK 8, but not tested and classes are built with JDK 11 bytecode.

Component owners

• Staffan Friberg

Learn more about component owners in component_owners.yml.