# Apache Airflow 2.2.2 — Release & Upgrade Intelligence
- **Product:** Apache Airflow (https://airflow.apache.org)
- **Version:** 2.2.2
- **Released:** Nov 15, 2021
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/airflow/updates/2.2.2/

## Executive Summary (TL;DR)
Apache Airflow 2.2.2. Source highlight: Fix bug when checking for existence of a Variable (#19395)

## New Features
- Add missing parameter documentation for "timetable" (#19282)

## Improvements
- Improve Kubernetes Executor docs (#19339)

## Bug Fixes
- Fix bug when checking for existence of a Variable (#19395)
- Fix Serialization when``relativedelta`` is passed as ``schedule_interval``  (#19418)
- Fix moving of dangling TaskInstance rows for SQL Server (#19425)
- Fix task instance modal in gantt view (#19258)
- Fix serialization of ``Params`` with set data type (#19267)
- Check if job object is ``None`` before calling ``.is_alive()`` (#19380)