The first release candidate for Apache HBase 2.0.0 is available for
downloading and testing.

Artifacts are available here:

Maven artifacts are available in the staging repository at:

All artifacts are signed with my signing key 8ACC93D2, which is also
in the project KEYS file at

These artifacts were tagged 2.0.0RC0 at
hash 011dd2dae33456b3a2bcc2513e9fdd29de23be46

Please review 'Upgrading from 1.x to 2.x' in the bundled HBase 2.0.0
Reference Guide before installing or upgrading for a list of
incompatibilities, major changes, and notable new features. Be aware that
according to our adopted Semantic Versioning guidelines[1], we've allow
ourselves to make breaking changes in this major version release. For
example, Coprocessors will need to be recast to fit more constrained CP
APIs and a rolling upgrade of an hbase-1.x install to hbase-2.x without
downtime is (currently) not possible. That said, a bunch of effort has been
expended mitigating differences; a hbase-1.x client can perform DML against
an hbase-2 cluster.

For the full list of ~6k issues addressed, see [2]. There are also and in the root directory of the source tarball.

Please take a few minutes to verify the release and vote on releasing it:

[ ] +1 Release this package as Apache HBase 2.0.0
[ ] +0 no opinion
[ ] -1 Do not release this package because...

This VOTE will run for one week and close Tuesday, April 17, 2018 @ 13:00

Thanks to the myriad who have helped out with this release,
Your 2.0.0 Release Manager


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