[ANNOUNCE] Apache Ozone 2.2.1 released

[Wei-Chiu Chuang <we...@apache.org>]

Hello all,

We are excited to announce the release of Apache Ozone 2.2.1!

Apache Ozone 2.2.1 is a maintenance release on top of Ozone 2.2.0 with bug fixes, performance improvements, and dependency updates.

## Notable Fixes

* [HDDS-15783](https://issues.apache.org/jira/browse/HDDS-15783) — SCM fails to deserialize empty lists from Ratis log
* [HDDS-15578](https://issues.apache.org/jira/browse/HDDS-15578) — InvalidStateTransitionException can crash SCM
* [HDDS-15791](https://issues.apache.org/jira/browse/HDDS-15791) — EC RECOVERING container data loss after idle scrub
* [HDDS-15849](https://issues.apache.org/jira/browse/HDDS-15849) — gRPC client shutdown slows parallel reads
* [HDDS-15665](https://issues.apache.org/jira/browse/HDDS-15665) — Datanode transaction iterator race condition
* [HDDS-12669](https://issues.apache.org/jira/browse/HDDS-12669) — ContainerSet recoveringContainerMap race condition
* [HDDS-15552](https://issues.apache.org/jira/browse/HDDS-15552) — Prometheus scraping fails on Ozone metrics
* [HDDS-11772](https://issues.apache.org/jira/browse/HDDS-11772) — Recon reports incorrect Ozone used capacity

## Downloads

* Download page: https://ozone.apache.org/download/
* Binary: https://www.apache.org/dyn/closer.cgi/ozone/2.2.1/ozone-2.2.1.tar.gz
* Source: https://www.apache.org/dyn/closer.cgi/ozone/2.2.1/ozone-2.2.1-src.tar.gz

## Documentation

* Release notes: https://ozone.apache.org/release-notes/2.2.1/
* Documentation: https://ozone.apache.org/docs/2.2.1/

Full changelog: https://issues.apache.org/jira/issues/?jql=project%3DHDDS+AND+fixVersion%3D2.2.1

Thanks,
Wei-Chiu Chuang