CombineFileSplit combineSplit = (CombineFileSplit) split;
// Use CombineFileRecordReader since this can handle CombineFileSplits
// and instantiate another RecordReader in a loop; do this with the
// CombineShimRecordReader.
RecordReader rr = new CombineFileRecordReader(combineSplit, context,
CombineShimRecordReader.class);
return rr;
}