The Magic of OpenTelemetry: Rewriting Your App in Production
summary
The talk explains how OpenTelemetry’s JVM agent instruments live applications by rewriting bytecode at runtime. It covers the javaagent mechanism, the Instrumentation API and ByteBuddy to intercept class loading and add traces, metrics and logs for frameworks like Spring, Servlet, JDBC and gRPC, and describes production impacts (latency, allocations, conflicts, changed runtime behavior) plus diagnostic best practices.
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chapters (7)
- 0:00OpenTelemetry intro
- 5:35Java agent demo
- 13:19Java agent internals
- 21:24Instrumentation impact
- 28:26Observability costs
- 32:55Startup overhead reduction
- 35:00Conclusion
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