Hi all, I'm pleased to announce the release of Apache Hadoop 3.0.0-alpha4. This release contains 814 bug fixes, improvements, and other enhancements since 3.0.0-alpha3. The changelog <http://hadoop.apache.org/docs/r3.0.0-alpha4/hadoop-project-dist/hadoop-common/release/3.0.0-alpha4/CHANGES.3.0.0-alpha4.html> and release notes <http://hadoop.apache.org/docs/r3.0.0-alpha4/hadoop-project-dist/hadoop-common/release/3.0.0-alpha4/RELEASENOTES.3.0.0-alpha4.html> provide more detailed information. The documentation <http://hadoop.apache.org/docs/r3.0.0-alpha4/> provides a high-level overview of important features and changes coming in Hadoop 3.0. Please note that this is an alpha release. It comes with no guarantees of stability or quality, and is not intended for production usage. This is planned to be the final alpha before moving onto beta1. Thus, alpha4 is a great time to get more involved with testing and integration. Please reach out to us if we can help! The bits are still being propagated, so please try another mirror if the first doesn't work: https://hadoop.apache.org/releases.html Thanks as always to the many contributors who worked on this release! Cheers, Andrew