To 1.7
TODO
To 1.8
TODO
Keeping Hadoop in sync
After upgrading to a version with a differerent JDK (eg elasticsearch 1.3+) requires JDK7, it will likely be necessary to modify the Hadoop configuration to use a compatible JRE.
Go the "mapreduce" service configuration pages (described here), and in the "MapReduce Service Environment Safety Valve" text box, add the line (eg):
JAVA_HOME="/usr/java/JDK_VERSION/jre/"
on a separate line, where JDK_VERSION is the desired JRE, eg "jdk1.7.0_60"