Please make sure you're downloading from a nearby mirror site, not from www.apache.org.
We suggest downloading the current stable release.
The 2.3.z series is the current stable release line, it supercedes earlier release lines
If you are a user of HBase 1.y and can not yet upgrade to the stable release line, we suggest downloading the latest 1.y minor release.
For older versions, check the foundation archive of release artifacts.