static void readRecords(FileSystem fs, Path path, int count,
Configuration conf) throws IOException {
Reader reader =
new Reader(fs.open(path), fs.getFileStatus(path).getLen(), conf);
Scanner scanner = reader.createScanner();
try {
for (int nx = 0; nx < count; nx++, scanner.advance()) {
Assert.assertFalse(scanner.atEnd());
// Assert.assertTrue(scanner.next());