Release 19.1.0 contains a number of bug fixes as well as some new features over 19.0, including Drools, Quartz, Spring, and XML configuration parsing updates, plus a new syslog parser, and the ability to send string values with the TCP RRD strategy.
For a high-level overview of what’s changed in OpenNMS 19, see What’s New in OpenNMS 19.
For a complete list of changes in 19.1.0, see the release notes.