Custom input format query

[Mapred Learn]

Hi,
I have implemented a custom record reader to read fixed length records.
Pseudo code is as:

 class CRecordReader extends RecordReader<Text, BytesWritable> {
 private FileSplit fileSplit;
 private Configuration conf;
 private int recordSize;
 private int fileSize;
 private int recordNum = 0;
 private FSDataInputStream fileIn = null;
 private Text key = null;
 private BytesWritable value = null;
 private static int offset = 0;
 private String layoutStr ="";

 public void initialize(InputSplit inputSplit,
   TaskAttemptContext taskAttemptContext) throws IOException {
  fileSplit = (FileSplit) inputSplit;
   final Path file = fileSplit.getPath();
  FileSystem fs = file.getFileSystem(conf);
        fileIn = fs.open(fileSplit.getPath());
        int metaInfoLen = fileIn.readInt();
        byte[] metaStr = new byte[metaInfoLen];
        int bytesRead = fileIn.read(metaStr, 0, metaInfoLen);
        if (bytesRead <= 0) {
         System.out.println("error bytes");
        }
        String metaInfo =  new String(metaStr, "US-ASCII");
        String[] fileMetadata = metaInfo.split("-");
  String fileLenStr = fileMetadata[1];
  String recordLenStr = fileMetadata[2];
  layoutStr = fileMetadata[3];
     recordSize = Integer.parseInt(recordLenStr);
  fileSize = Integer.parseInt(fileLenStr);
 }

public boolean nextKeyValue() throws IOException, InterruptedException {
  // TODO Auto-generated method stub
  if (key ==null) {
   key =  new Text();
  }

  key.set(recordNum + "-" + layoutStr);

  if (value == null) {
        value = new BytesWritable();
  }

  int bytesRead = 0;
  while (offset < fileSize ) {
   byte[] record = new byte[recordSize];

   bytesRead = fileIn.read(record, 0, recordSize);

   if ((bytesRead == 0) || (bytesRead < recordSize)) {
    key = null;
    value = null;
    return false;
   }
   offset += bytesRead;
   value.set(record, 0, recordSize);
   }
  return true;
 }
}

The problem is that my input file has only 2 records but mapper keeps on
iteraing over the first record again and again and never ends.

Obviously I am doing it wrong.. Could somebody help what am I doing wrong ?

Thanks in advance
- Jimmy