GenericOptionsParser's -files flag to pass metadata to task nodes

GenericOptionsParser.java

// Pass the file to the task nodes using genericoptionsparser's -files flag

// $ hadoop jar MyJob.jar -conf /path/to/cluster-conf.xml -files /path/to/local-file.csv data/input data/output

public static class TheMapper extends Mapper<LongWritable, Text, Text, Text> {

    @Override
    public void setup(Context context) throws IOException, InterruptedException {
       CsvReader csv = new CsvReader(new File("local-file.csv"));

       // work with csv file..

    }

  // ..
}