Folks,
It gives me great pleasure to announce that the Apache Hadoop community has
voted to release Apache Hadoop 2.3.0!
hadoop-2.3.0 is the first release for the year 2014, and brings a number of
enhancements to the core platform, in particular to HDFS.
With this release, there are two significant enhancements to HDFS:
• Support for Heterogeneous Storage Hierarchy in HDFS (HDFS-2832)
• In-memory Cache for data resident in HDFS via Datanodes (HDFS-4949)
In YARN, we are very excited to see that ResourceManager Automatic Failover
(YARN-149) is nearly complete; even it isn’t ready for primetime yet. We expect
it to land by the next release i.e. hadoop-2.4. Furthermore, a number of key
operational enhancements have been driven into YARN such as better logging,
error-handling, diagnostics etc.
On the MapReduce side of the house, a key enhancement is MAPREDUCE-4421; with
this we now no longer need to install MapReduce binaries on every machine and
can just use a MapReduce tarball via the YARN DistributedCache by copying it
into HDFS.
Of course, a number of bug-fixes, enhancements etc. have also made it into
hadoop-2.3; there-by continuing to improve the core platform. Please see the
release notes for more details.
thanks,
Arun
PS: Here is a CVE for a security fix along with the release.
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CVE-2013-6446: Apache Hadoop job history server vulnerability
Severity: Major
Vendor: The Apache Software Foundation
Versions Affected:
Hadoop 0.23.1 to 0.23.9
Hadoop 2.0.0 to 2.2.0
Users affected: Users who have enabled Hadoop's MapReduce security features
Impact: Vulnerability allows an unauthorized user to retrieve job details from
the job history server.
Mitigation:
0.23.x users should upgrade to 0.23.10.
2.x users should upgrade to 2.3.0.
Credit:
This issue was discovered by Koji Noguchi of Yahoo.
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