support CDH4
support CDH4

smartinsightsfromdata/hadoop-book,venuatthota/hadoop-book-1,jordancheah/hadoop-book,alexholmes/hadoop-book,robin-lai/hadoop-book-1,robin-lai/hadoop-book-1,priyatransbit/hadoop-book,clebeg/mylinuxbackup,priyatransbit/hadoop-book,venuatthota/hadoop-book-1,jordancheah/hadoop-book,venuatthota/hadoop-book-1,alexholmes/hadoop-book,priyatransbit/hadoop-book,jordancheah/hadoop-book,alexholmes/hadoop-book,priyatransbit/hadoop-book,alexholmes/hadoop-book,smartinsightsfromdata/hadoop-book,smartinsightsfromdata/hadoop-book,clebeg/mylinuxbackup,jordancheah/hadoop-book,smartinsightsfromdata/hadoop-book,clebeg/mylinuxbackup,robin-lai/hadoop-book-1,venuatthota/hadoop-book-1,clebeg/mylinuxbackup,robin-lai/hadoop-book-1