Apache Hadoop 2.7.1于美国时间2015年07月06日正式发布，本版本属于稳定版本，是自Hadoop 2.6.0以来又一个稳定版，同时也是Hadoop 2.7.x版本线的第一个稳定版本，也是 2.7版本线的维护版本，变化不大，主要是修复了一些比较严重的Bug（其中修复了131个Bugs和patches）。比较重要的特性请参见《Hadoop 2.7.0发布：不适用于生产和不支持JDK1.6》

邮件内容

Hi all,

It gives me great pleasure to announce that the Apache Hadoop community has
voted to release Apache Hadoop 2.7.1.

Hadoop 2.7.1 is the first minor release in the Hadoop-2.7.x line.

This release is now considered the first stable release in 2.7.x line.
It brings
in a number of enhancements since the last stable release of 2.6.0. For a
list of enhancements since 2.6.0, please navigate to the release
documentation page .

The release has 131 resolved issues with the following breakdown

- 15 in Hadoop Common
- 50 in HDFS
- 55 in YARN
- 11 MapReduce

Please see the Hadoop 2.7.1 Release Notes

for a detailed list of issues resolved. The release news is posted on the
Hadoop website too, you can go to the downloads section directly (
http://hadoop.apache.org/releases.html#Download). The release documentation
is up at http://hadoop.apache.org/docs/r2.7.1/.

Thanks to everyone who contributed to the release!

+Vinod

Hadoop 2.7.1 Release Notes

http://hadoop.apache.org/docs/r2.7.1/hadoop-project-dist/hadoop-common/releasenotes.html

下载地址

　　发行版：http://www.apache.org/dyn/closer.cgi/hadoop/common/hadoop-2.7.1/hadoop-2.7.1.tar.gz
　　源码：http://www.apache.org/dyn/closer.cgi/hadoop/common/hadoop-2.7.1/hadoop-2.7.1-src.tar.gz