title: How to Use Output of one reducer as input to another mapper?
body: <p>I want to extract  distinct values from a reducer's output. For that, I write a code in separate mapper and reducer. That is, I have one mapper reducer for generating a training file and a second mapper-reducer  gives the distinct rows from the training file. I want both files for testing purposes. So how to use first reducer's output to another mapper as input?</p>