This is a release of Apache Hadoop 3.3 line.
It contains 117 bug fixes, improvements and enhancements since 3.3.5. Users of Apache Hadoop 3.3.5 and earlier should upgrade to this release.
Starting from this release, Hadoop publishes Software Bill of Materials (SBOM) using CycloneDX Maven plugin. For more information on SBOM, please go to SBOM.
HDFS Router-Router Based Federation now supports storing delegation tokens on MySQL, HADOOP-18535 which improves token operation through over the original Zookeeper-based implementation.
HADOOP-18671 moved a number of HDFS-specific APIs to Hadoop Common to make it possible for certain applications that depend on HDFS semantics to run on other Hadoop compatible file systems.
In particular, recoverLease() and isFileClosed() are exposed through LeaseRecoverable interface, while setSafeMode() is exposed through SafeMode interface.
Users are encouraged to read the overview of major changes since release 3.3.5. For details of 117 bug fixes, improvements, and other enhancements since the previous 3.3.5 release, please check release notes and changelog.2023 Jun 23