I don't think that is a not he main issue because I found that the versions are the same. On my machine which runs hadoop 1.2.0 [mahmood@tiger Index]$ java -versionjava version "1.7.0_71" OpenJDK Runtime Environment (rhel-2.5.3.1.el6-x86_64 u71-b14) OpenJDK 64-Bit Server VM (build 24.65-b04, mixed mode)
According to a discussion on SO, http://goo.gl/9cg4xg, I extracted the jar file and found that version of class data is 51. That means the java which compiled the class file was 1.7 (I mean the java version of developers) [mahmood@tiger Index]$ jar xf indexdata.jar [mahmood@tiger Index]$ file IndexData.class IndexData.class: compiled Java class data, version 51.0 Regards, Mahmood
