Subject: [ANNOUNCE] Apache HBase 2.2.1 is now available for download

The HBase team is happy to announce the immediate availability of HBase

Apache HBase™ is an open-source, distributed, versioned, non-relational
database. Apache HBase gives you low latency random access to billions of
rows with
millions of columns atop non-specialized hardware. To learn more about
HBase, see

To download 2.2.1, visit our download page:

HBase 2.2.1 is the latest release of the HBase 2.2 line, continuing on the
theme of bringing a stable, reliable database to the Apache Big Data
ecosystem and beyond. 2.2.1 includes 161 bug and improvement fixes done
since the 2.2.0. Most hbck2 abilities introduced by HBASE-21745 was
released in 2.2.1 (HBASE-21745 addressed gaps between hbck1 and hbck2). And
There are several critical fixes:
-HBASE-22867 The ForkJoinPool in CleanerChore will spawn thousands of
threads in our cluster with thousands table
-HBASE-22169 Open region failed cause memory leak
-Fixes around WAL, which may cause WAL corruption or hang the region
server. Please see HBASE-22539, HBASE-22681, HBASE-22684 for more details.

The list of 161 changes made since 2.2.0 can be found here:

For instructions on verifying ASF release downloads, please see

Project member signature keys can be found at

Question, comments, and problems are always welcome at: [EMAIL PROTECTED]

Thanks to all who contributed and made this release possible.

The HBase Dev Team