:_mod-docs-content-type: REFERENCE [id="ref_rn-qdocs-1393-opentelemetry-jfr-semeru-known-issue"] = OpenTelemetry: Flight Recorder dependent features fail on Semeru 17 and 21 In the current release, applications that run on IBM Semeru (OpenJ9) JDK 17 or 21 fail to start when OpenTelemetry features that rely on Java Flight Recorder (JFR) are enabled. Startup logs include a stack trace with the message `Flight Recorder is not supported on this VM`. To proceed, run on a HotSpot-based JDK that supports JFR. Alternatively, disable the JFR-dependent telemetry until a compatible Semeru build is available. For more information, see: * Quarkus link: https://quarkus.io/guides/jfr [Using Java Flight Recorder] guide * link: https://github.com/quarkusio/quarkus/issues/50863 [Quarkus issue: failures on Semeru JDK 17 and 21] * link: https://www.eclipse.org/openj9/docs/xxflightrecorder/ [OpenJ9 documentation: Flight Recorder support] // https://issues.redhat.com/browse/QDOCS-1393 // SME: Bruno Baptista; Martin Ocenas // Observability // Known issue // include::rn/ref_rn-qdocs-1393-opentelemetry-jfr-semeru-known-issue.adoc[leveloffset=+2]