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Fix opentelemetry example: bump javaagent for JDK 25 compatibility - #208
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The pinned opentelemetry-javaagent 1.25.1 (mid-2023, duplicated across the 4 booking module poms) silently fails to attach on JDK 25 (InaccessibleObjectException), so no spans reach Jaeger with no obvious startup error. Bump to 2.19.0, already proven working in the observability-services and rest-cxf-opentelemetry examples in this repo, and centralize the property in the opentelemetry parent pom. The newer agent also defaults its OTLP exporter to HTTP/protobuf (port 4318) instead of gRPC (4317), so expose 4318 on the otel-collector service in the docker-compose stack - the collector already listens on it, it just wasn't published to the host. Verified end-to-end on JDK 25 against the real docker-compose stack: sync and async bookTrip requests return 200, full distributed traces (27 and 45 spans) land in Jaeger across all 4 services, and Camel exchange metrics are scraped by Prometheus. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Wgr7MBBqUbNGG6xrH6ybWq
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Summary
opentelemetryexample's 4 booking modules (CarBooking, FlightBooking, HotelBooking, TripBooking) pinnedopentelemetry-javaagentto1.25.1(mid-2023), duplicated across each module's pom. That version silently fails to attach on JDK 25 (InaccessibleObjectException), so no spans reach Jaeger with no obvious startup error - it only worked when re-run on JDK 17.2.19.0, matching the version already proven working in this repo'sobservability-servicesandrest-cxf-opentelemetryexamples, and centralized the property in theopentelemetryparent pom instead of duplicating it 4 times.otel-collectorservice already listens on 4318 but didn't publish it to the host, so exposed that port too.Test plan
mvn installbuilds all 4 modules on JDK 25, agent 2.19.0 downloaded/copied/camel/bookTrip) and async/Kafka (/camel/asyncBookTrip) requests both return 200