It looks like you have an issue with your classpath, I think it is because
you add a jar containing Spark twice: first, you have a dependency on Spark
somewhere in your build tool (this allows you to compile and run your
application), second you re-add Spark here
> sc.addJar("/home/hadoop/spark-assembly-1.5.2-hadoop2.6.0.jar")//It
doesn't work.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!?????
I recommend you remove that line and see if everything works.
If you have that line because you need hadoop 2.6, I recommend you build
spark against that version and publish locally with maven
