I think map function gets the line number as key. You can ignore te other lines after the key value 500.
Thanks -----Original Message----- From: Leiz [mailto:lzhan...@gmail.com] Sent: Friday, June 26, 2009 8:57 AM To: core-user@hadoop.apache.org Subject: hwo to read a text file in Map function until reaching specific line For example , I have a text file with 1000 lines. I only want to read the first 500 line of the file. How can I do in Map function? Thanks -- View this message in context: http://www.nabble.com/hwo-to-read-a-text-file-in-Map-function-until-reaching -specific-line-tp24222783p24222783.html Sent from the Hadoop core-user mailing list archive at Nabble.com.
