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From: Arun C Murthy <acm@hortonworks.com>
Subject: [ANNOUNCE] Apache Hadoop 2.3.0 released
Message-Id: <93D66EB1-48B6-4DDD-A8A5-32E422C11222@hortonworks.com>
Date: Mon, 24 Feb 2014 13:46:10 -0800
To: "general@hadoop.apache.org" <general@hadoop.apache.org>
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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:
	=95 Support for Heterogeneous Storage Hierarchy in HDFS (HDFS-2832)
	=95 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=92t ready for primetime yet. We=
 expect it to land by the next release i.e. hadoop-2.4. Furthermore, a numb=
er of key operational enhancements have been driven into YARN such as bette=
r logging, error-handling, diagnostics etc.

On the MapReduce side of the house, a key enhancement is MAPREDUCE-4421; wi=
th this we now no longer need to install MapReduce binaries on every machin=
e and can just use a MapReduce tarball via the YARN DistributedCache by cop=
ying 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 th=
e release notes for more details.

thanks,
Arun


PS: Here is a CVE for a security fix along with the release.

----

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 f=
rom 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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