private boolean doNextWithExceptionHandler(K key, V value) throws IOException {
    return super.doNext(key, value);
  }
BucketizedHiveRecordReader is a wrapper on a list of RecordReader. It behaves
similar as HiveRecordReader while it wraps a list of RecordReader from one
file.
ql/src/java/org/apache/hadoop/hive/ql/io/BucketizedHiveRecordReader.java