Release 22.0.1 is the latest stable release of OpenNMS Horizon.
It contains a number of bug fixes and enhancements, including an update to Drools 7, performance improvements to the flow exporter ReST endpoint, and new karaf shell tools for diagnosing nodes.
For a high-level overview of what’s changed in OpenNMS 22, see What’s New in OpenNMS 22.
For a complete list of changes in 22.0.1 see the release notes.