Speaker Details

Philipp Krenn

Philipp lives to demo interesting technology. Having worked as a web, infrastructure, and database engineer for over ten years, Philipp is now a developer advocate and EMEA team lead at Elastic — the company behind the Elastic Stack consisting of Elasticsearch, Kibana, Beats, and Logstash.

The State of OpenTelemetry for Java Developers
Conference (INTERMEDIATE level)
Room 6

OpenTelemetry, or OTel for short, is taking over the observability world to uncover all kinds of performance problems or errors. Let’s look at that hands-on.

This talk dives into the background of OTel including the technologies its building on (or replacing). It also takes a look at what auto-instrumentation can and cannot achieve. As well as the latest developments beyond tracing with metrics and the first steps towards logging.

This talk also takes a look at different approaches of integration — the Spring ecosystem is wrapping most of OTel into Micrometer while other frameworks are not. What are the pros and cons of these different integrations for the developers.

Java under the Hood of Elasticsearch

Elasticsearch is one of the most widely used Java projects out there. While many people know the REST interface and how to use it, this talk takes a look under the hood and picks up some of the more interesting Java topics there:

  • Why and how Elasticsearch is always bundling the latest JDK with the default binary; also what lessons can be learned from Docker to Java distributions issues.
  • What Java features is Elasticsearch (not) using; also what are the requirements for building / testing and running.
  • While the Java Security Manager served Elasticsearch extremely well for Log4Shell and other security issues, what are the next steps after its deprecation to replace it.
  • Elasticsearch's Gradle setup is a monster but a powerful one — how does it keep the developers productive and what are the most important changes around performance.