@Override
    public RecordReader getRecordReader(JobConf job, CombineFileSplit split,
        Reporter reporter,
        Class<RecordReader<K, V>> rrClass)
        throws IOException {
      CombineFileSplit cfSplit = split;
      return CombineFileRecordReader.createInstance(job, cfSplit, reporter, rrClass);
    }
Get the record reader for the next chunk in this CombineFileSplit.
shims/common/src/main/java/org/apache/hadoop/hive/shims/HadoopShimsSecure.java