Try adding this
Job job = new Job(conf, "wordcount");job.setJarByClass(WordCount.class);
I also got the same issue and fixed it by removing same WordCount.class file in the same directory from where I am executing my jar. Looks like it is taking the class out side the jar. Try
I suspect this :
14/01/27 13:16:02 WARN mapred.JobClient: No job jar file set. User classes may not be found. See JobConf(Class) or JobConf#setJar(String).
I got the same error when using CDH4.6 and it got solved after resolving the above warning.