Error in pig while loading data

Question

I am using ubuntu 12.02 32bit and have installed hadoop2.2.0 and pig 0.12 successfully. Hadoop runs properly on my system.

However,

Answer 1

This is your clue ERROR org.apache.hadoop.mapreduce.lib.jobcontrol.JobControl - Error while trying to run jobs. java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected. The interface "jobcontrol" is looking for a certain class and doesn't find it.