This is the next release of Apache Hadoop 2.8 release line. It contains 79 bug fixes, improvments and other enhancements since 2.8.2.
For major features and improvements for Apache Hadoop 2.8, please refer: overview of major changes. For details of 79 fixes, improvements, and other enhancements since the previous 2.8.2 release, please check: release notes and changelog
2017 Dec 12