index File create by mapFile can't read

Hi Recently i want to save a big RDD[(k,v)] in form of index and data ,I deceide to use hadoop mapFile. I tried some examples like this :https://gist.github.com/airawat/6538748 I runs the code well and generate a index and data file. I can use command "hadoop fs -text /spark/out2

index File create by mapFile can't

Hi Recently I want to save a big RDD[(k,v)] in form of index and data ,I deceide to use hadoop mapFile. I tried some examples like this :https://gist.github.com/airawat/6538748 I runs the code well and generate a index and data file. I can use command "hadoop fs -text /spark/out2