If this happens, the release notes will provide detailed upgrade instructions. The only exception to the above with respect to 100% backwards compatibility is when a security or data loss issue can’t be fixed without breaking backwards-compatibility. That includes 46 new features, 39 improvements, 52 bug fixes, and several documentation changes. So the answer to “should I upgrade to the latest patch release?” will always be “yes.” Apache Airflow 2.4.0 contains over 650 user-facing commits (excluding commits to providers or chart) and over 870 total. These releases will be 100% compatible with the associated feature release. Patch releases (X.Y.Z, X.Y.Z+1, etc.) will happen, on an as-needed basis, as issues are reported and fixed. These releases will contain new features, improvements to existing features, and such. Feature releasesįeature releases (X.Y.0, X.Y+1.0, etc.) will happen roughly every two or three months – see release process for details. For example, if you are developing using Maven and want to use the SDK for Java with the DirectRunner, add the following dependencies to your pom.xml. The Java SDK is available on Maven Central Repository, and the Python SDK is available on PyPI. These releases do not happen with any regular interval or on any predictable schedule.Įach time a new major version is released previously deprecated features will be removed. The easiest way to use Apache Beam is via one of the released versions in a central repository. Major releases (X.0.0, X+1.0.0 etc.) indicate a backwards-incompatible change. That is all SemVer is – it’s a statement of our intent as package authors, and a clear statement of our goals. Because that’s all SemVer is: a TL DR of the changelog. Knowing the intentions of a maintainer can be valuable – especially when things break. Tags for the main Airflow release have the form X.Y.Z (no leading v) and provider packages are tagged with the form providers-/X.Y.Z.Īlthough Airflow follows SemVer this is not a promise of 100% compatibility between minor or patch releases, simply because this is not possible: what is a bug to one person might be a feature another person is depending on. In git, each minor version will have its own branch, called vX-Y-stable where bugfix/security releases will be issued from.Ĭommits and PRs should not normally go direct to these branches, but instead should target the main branch and then be cherry-picked by the release managers to these release branches.Įach Airflow release will also have a tag in git indicating its version number, signed with the release manager’s key. These are of the form X.Y.Z alpha/beta/rc N, which means the Nth alpha/beta/release candidate of version X.Y.Z The Core of Apache Airflow provides core scheduler functionality which allow you to write some basic tasks, but the capabilities of Apache Airflow can be extended by installing additional packages, called providers. Z is the patch number, which is incremented for bugfix and security releases.īefore every new release, we’ll make a release candidate available, and often alpha or beta release too. Apache Airflow 2 is built in modular way. Y is the minor version number, also called the feature release version number. Since Airflow 2.0.0 and provider packages 1.0.0 we aim to follow SemVer, meaning the release numbering works as follows:
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