public void initialize(InputSplit split, TaskAttemptContext context)
throws IOException, InterruptedException {
Path path = ((FileSplit) split).getPath();
Configuration conf = context.getConfiguration();
FileSystem fs = path.getFileSystem(conf);
this.in = new SequenceFile.Reader(fs, path, conf);
this.end = ((FileSplit) split).getStart() + split.getLength();
if (((FileSplit) split).getStart() > in.getPosition()) {
in.sync(((FileSplit) split).getStart()); // sync to start
}
this.start = in.getPosition();
vbytes = in.createValueBytes();
done = start >= end;
info = InputInfo.getInstance();
info.setSplit((FileSplit) split);
System.err.println("input split = " + split);
}
