FileSystem fs = FileSystem.get(defaults);
fs.delete(new Path(outputDir));
String[] inputDirsSpecs = inputDir.split(",");
for (int i = 0; i < inputDirsSpecs.length; i++) {
String spec = inputDirsSpecs[i];
job.addInputPath(new Path(spec));
}
job.setInputFormat(SequenceFileInputFormat.class);
job.setMapperClass(mapper);