I personally support this. I had suggest drawing the line at Hadoop
2.6, but that's minor. More info:
Hadoop 2.7: April 2015
Hadoop 2.6: Nov 2014
Hadoop 2.5: Aug 2014
Hadoop 2.4: April 2014
Hadoop 2.3: Feb 2014
Hadoop 2.2: Oct 2013
CDH 5.0/5.1 = Hadoop 2.3 + backports
CDH 5.2/5.3 = Hadoop 2.5 +
We've dropped Hadoop 1.x support in Spark 2.0.
There is also a proposal to drop Hadoop 2.2 and 2.3, i.e. the minimal
Hadoop version we support would be Hadoop 2.4. The main advantage is then
we'd be able to focus our Jenkins resources (and the associated maintenance
of Jenkins) to create builds
