The second release candidate for Apache HBase 2.1.0 is available for downloading and testing.
Artifacts and compatibility report are available here: https://dist.apache.org/repos/dist/dev/hbase/2.1.0RC1/ Notice that due to HBASE-19735, now we have a hbase-2.1.0-client-bin.tar.gz, which contains a reduced set of dependencies for client. Maven artifacts are available in the staging repository at: https://repository.apache.org/content/repositories/orgapachehbase-1225 All artifacts are signed with my signing key 9AD2AE49, which is also in the project KEYS file at http://www.apache.org/dist/hbase/KEYS These artifacts were tagged 2.1.0RC1 at hash e1673bb0bbfea21d6e5dba73e013b09b8b49b89b. There are 245 issues resolved since 2.0.0. Some new features are: 1. Procedure v2 based replication peer modification. The advantage here is that all the replication peer modification will be synchronous, which means after the you come back from the call, you can make sure that all the region servers have loaded the changes. Please see HBASE-19397 for more details. 2. Serial Replication. Now in replication we can make sure the order of pushing logs is same as the order of requests from client. Please see HBASE-20046 and HBASE-9465 for more details. For other important changes: 1. The minimum hadoop version has been changed to 2.7.1. 2. We have successfully done a rolling upgrade from 1.4.3 to 2.1.0 which shows that rolling upgrade from 1.x to 2.x is possible. Notice that this is only a experimental feature, as there are likely uncovered corner cases in our limited test. See http://hbase.apache.org/book.html#upgrade2.0.rolling.upgrades for more details. And HBASE-20862 has fixed the compatibility issues. You can read the issues for more details about the compatibility between 2.0.0 and 2.1.0. For all the changes, please see the CHANGES.md and RELEASENOTES.md. Please take a few minutes to verify the release and vote on releasing it: [ ] +1 Release this package as Apache HBase 2.1.0 [ ] +0 No opinion [ ] -1 Do not release this package because... The vote will be closed at next Tuesday, 7.17. Thanks to the myriad who have helped out with this release, Your 2.1.0 Release Manager
