May 2021 Releases – Horizon 27.2.0, Meridians 2021.1.0, 2020.1.8, 2019.1.19, and 2018.1.28
Tags: news, horizon, meridian
Published: 2021-05-24 16:54:40

---
title: May 2021 Releases – Horizon 27.2.0, Meridians 2021.1.0, 2020.1.8, 2019.1.19, and 2018.1.28
published: true
cover_image: https://pbs.twimg.com/media/E1SY105WQAYSr1B?format=jpg&name=medium
date: 2021-05-13 15:20:10 UTC
tags: News,Horizon,Meridian
canonical_url: https://www.opennms.com/en/blog/2021-05-13-may-2021-releases-horizon-27-2-0-meridians-2021-1-0-2020-1-8-2019-1-19-and-2018-1-28/?utm_source=rss&utm_medium=rss&utm_campaign=may-2021-releases-horizon-27-2-0-meridians-2021-1-0-2020-1-8-2019-1-19-and-2018-1-28
---

In May, we released updates to all OpenNMS Horizon and Meridian versions under active support, and released the first iteration of Meridian 2021.

### Horizon 27.2.0

Horizon 27.2.0 is a release primarily targeting bug fixes, plus it includes our new branding refresh.

The codename for 27.2.0 is [_Magrathea_](https://hitchhikers.fandom.com/wiki/Magrathea).

For a high-level overview of what has changed in Horizon 27, see [What’s New in OpenNMS Horizon 27](https://docs.opennms.org/opennms/releases/27.2.0/releasenotes/releasenotes.html#releasenotes-27).

For a complete list of changes in 27.2.0, see [the detailed release notes](https://docs.opennms.org/opennms/releases/27.2.0/releasenotes/releasenotes.html#releasenotes-changelog-27.2.0).

### Meridian Point Releases

Meridian 2018.1.28 was a tiny release, containing only an update to Apache Commons IO.

Meridian 2019.1.19 adds a backport of a number of browser security issues fixed the previous month in newer releases, plus a few other bug fixes.

Meridian 2020.1.8 contains all of those changes, plus a few other small bug fixes.

For a list of changes, see the release notes:

- [2018.1.28](https://meridian.opennms.com/releasenotes/2018/latest/#_release_meridian_2018_1_28) ([_Solar Storm_](https://wikipedia.org/wiki/Solar_storm))
- [2019.1.19](https://meridian.opennms.com/releasenotes/2019/latest/#_release_meridian_2019_1_19) ([_Ditsö̀_](https://wikipedia.org/wiki/WASP-17b))
- [2020.1.8](https://meridian.opennms.com/releasenotes/2020/latest/#_release_meridian_2020_1_8) ([_Isthmus_](https://wikipedia.org/wiki/Isthmus))

### Meridian 2021

May also saw the release of Meridian 2021.1.0, the first in the 2021 series.

It is based on Horizon 27, which has proven to be one of our most solid series in quite a while. The most notable changes since Meridian 2020 (based on Horizon 26) are the removal of the legacy Remote Poller and the introduction of Application Perspective Monitoring, performing a similar set of functions using the Minion. Additionally, there are tons of bug fixes and other smaller feature improvements.

For an overview of what's changed since Meridian 2020, see the [What's New](https://docs.opennms.com/meridian/2021.1.0/releasenotes/whatsnew.html) section of the Meridian 2021 documentation.

Sharp readers will notice this is on our new [docs.opennms.com](https://docs.opennms.com/) site. We are in the process of moving projects from publishing to [docs.opennms.org](https://docs.opennms.org/) to the new Antora-based unified docs site.