GeoServer 3 marks the completion of a long-planned modernization effort aimed at keeping the project aligned with the current Java ecosystem, while preserving the stability and backwards compatibility that users rely on. Now that GeoServer 3 has been available for a few months, this session provides a final update on the work and its outcomes.

We’ll revisit the initial drivers behind the transition, starting from the upgrade of core dependencies, how that cascaded to more updates, resulting in a coordinated effort across multiple projects. From there, we’ll outline the main phases of the work: how the upgrade was organized, funded, managed new needs, and ultimately delivered.

The talk focuses on the process and its results: what it took to modernize a mature codebase while maintaining a high degree of compatibility, the challenges encountered along the way, and how they were addressed. We’ll also share early feedback from adoption and what users can expect when moving to GeoServer 3.

Join us for a practical retrospective on the transition to GeoServer 3, and a discussion of how the project continues to evolve while staying true to its core principles.