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Kroxylicious release 0.16.0

September 30, 2025 by Keith Wall

The Kroxylicious project is very pleased to announce the release of Kroxylicious 0.16.0. See the Changelog for a list of changes and summary of Deprecations, Changes and Removals.

The main highlights of this release are:

Apache Kafka 4.1.0 compatibility

The main change in this release is Apache Kafka 4.1.0 compatibility. The proxy will now relay Kafka 4.1 specific versions of the Kafka RPC and your filters can intercept them.

Observability improvements

Thanks to the work of hrishabhg, the proxy now sports connection count gauges, alllowing you to monitor downstream and upstream connection counts in realtime.

Feedback

Please let us know, through Slack, GitHub or even bsky), if you find the project interesting or helpful and especially if you have deployed it in production.