if (quantilesFile.length() == 0)
throw new RuntimeException(this.getClass().getSimpleName() + " used but no quantiles found");
try{
InputStream is = FileLocalizer.openDFSFile(quantilesFile,ConfigurationUtil.toProperties(job));
BinStorage loader = new BinStorage();
DataBag quantilesList;
loader.bindTo(quantilesFile, new BufferedPositionedInputStream(is), 0, Long.MAX_VALUE);
Tuple t = loader.getNext();
if(t==null) throw new RuntimeException("Empty samples file");
// the Quantiles file has a tuple as under:
// (numQuantiles, bag of samples)
// numQuantiles here is the reduce parallelism
Map<String, Object> quantileMap = (Map<String, Object>) t.get(0);