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February 23, 2013
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Apache HBase 0.94.5 is out!

Last week, the HBase community released 0.94.5, which is the most stable release of HBase so far. The release includes 76 jira issues resolved, with 61 bug fixes, 8 improvements, and 2 new features.

Most of the bug fixes went against the REST server, replication, region assignment, secure client, flaky unit tests, 0.92 compatibility and various stability improvements. Some of the interesting patches in this release are:
[HBASE-3996] – Support multiple tables and scanners as input to the mapper in map/reduce jobs
[HBASE-5416] – Improve performance of scans with some kind of filters.
[HBASE-7757] – Add web UI to REST server and Thrift server
[HBASE-7748] – Add DelimitedKeyPrefixRegionSplitPolicy
[HBASE-6669] – Add BigDecimalColumnInterpreter for doing aggregations using AggregationClient
[HBASE-7728] – Deadlock occurs between hlog roller and blog syncer’

The release candidate has been extensively tested by Hortonworks and many others in the community. You can roll out the 0.94.5 bits using rolling upgrade on top of 0.92 or 0.94 releases. In addition, Apache HBase 0.94.5 will be incorporated into an upcoming update to HDP 1.2.

You can download the new release from here, and find full release notes here.

Last, but not least, we would like to thank Lars Hofhansl, who is the release manager of 0.94 branch for driving the release train, and all 30 individuals, who have contributed to this release.



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