Release Meridian-2021.1.0

Release 2021.1.0 is the first in the Meridian 2021 series, based on Horizon 27.

The codename for 2021.1.0 is Perseverance.


  • Not possible to define notification parameters via "Configure notifications" UI (Issue NMS-8581)

  • Race condition on ALEC’s config bundle after installation (Issue NMS-12766)

  • Add a warning when enabling forwarding metrics through the Kafka Producer (Issue NMS-13039)

  • Reflected XSS reported 2021-03-31 (update summary after disclosure) (Issue NMS-13229)

  • Backport Security Issues from Last Month (Issue NMS-13231)

  • vmware integration connection pool not expiring connections (Issue NMS-13234)

  • Cleared alarms with closed ticket state not removed when using a hybrid approach (Issue NMS-13237)

  • Update Vaadin dependencies (Issue NMS-13261)


  • Migrate OpenNMS core docs to Antora (Issue NMS-12497)

  • Overview chapter (Issue NMS-12670)

  • Create Win32ServiceDetector documentation (Issue NMS-13074)

  • Create WmiDetector documenation (Issue NMS-13075)

  • Create BgpSessionDetector documentation (Issue NMS-13076)

  • Enable Single topic by default for Kafka RPC (Issue NMS-13104)

  • Re-enable Kafka RPC Single Topic By Default (Issue NMS-13184)

  • Update Help page with doc links in the Web UI (Issue NMS-13225)

  • Admin Guide Newts Instructions Incomplete (Issue NMS-13242)

  • Minion - Meridian Installation Documents Incorrect (Issue NMS-13247)

  • Provide documentation for context-sensitive help in UI form (Issue NMS-13255)