On December 10, 2011 Hadoop PMC voted to release Hadoop 0.22.0
The release have been brewing for one year.
It incorporates over 700 jiras fixed since the release of 0.21.0.
It is good to have it finalized.
Please note that 0.22.0 release does not support security.
For more details see the release news page and the release notes
The release can be downloaded from
Than you everybody for contributing to Apache Hadoop!