To 1.7
Simply download the latest JDK7 RPM from the Oracle website, install on all nodes (check that "/usr/java/latest" and "/usr/java/default" now point to the right directory, and restart "infinit.e-index-engine" and "tomcat6-interface-engine" services (the latter only on API nodes, the former typically on both)
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Check if java is installed correctly:
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[ec2-user@ip-10-113-42-186 java]$ java -version java version "1.8.0_25" Java(TM) SE Runtime Environment (build 1.8.0_25-b17) Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode) |
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):
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