HADOOP :: java.lang.ClassNotFoundException: WordCount

Question

I am using eclipse to export the jar file of a map-reduce program. When i am run the jar using command

 hadoop jar hadoop-prog.jar WordCount /home/temp/input /h         


        

Answer 1

If you're trying to run the wordcount provided in the examples, you should run:

hadoop jar hadoop*examples*.jar wordcount /home/temp/input /home/temp/output

More info on how to run wordcount on this link.

In general, if you're developing your own Map/Reduce jobs, you should include the full package name of your driver class, so something like this might work:

hadoop jar wordcount.jar com.something.WordCount /home/temp/input /home/temp/output