The OpenZipkin project provides tracing information not only for Java Programs. This allows you to propagate context information within and between services. It also collects timing information that will prove valuable to hunt latencies in your application.
Over the time there is now a collection of resources available online:
Article in German (on Heise Developer)
Article in English (from Dutch Java User Group Magazine)
Video in German (recorded at Java User Group Saarland)
Video in English (recorded at Voxxed Days Cluj)
The audio quality on the English recording is not very good, I hope I can re-record it another conference at some point in time.