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Fwd: debugging hadoop streaming programs (first code)jamal sasha 2012-11-20, 01:18
Forgot reducer :)
---------- Forwarded message ---------- From: jamal sasha <[EMAIL PROTECTED]> Date: Mon, Nov 19, 2012 at 8:17 PM Subject: debugging hadoop streaming programs (first code) To: [EMAIL PROTECTED] Hi, This is my first attempt to learn the map reduce abstraction. My problem is as follows I have a text file as follows: id 1, id2, date,time,mrps,code,code2 3710100022400,1350219887, 2011-09-10, 12:39:38.000, 99.00, 1, 0 3710100022400, 5045462785, 2011-09-06, 13:23:00.000, 70.63, 1, 0 Now what I want is to do is to count the number of transaction happening in every half an hour between 7 am and 11 am. So here are the intervals. 7-7:30 ->0 7:30-8 -> 1 8-8:30->2 .... 10:30-11->7 So ultimately what I am doing is creating a 2d dictionary d[id2][interval] = count_transactions. My mappers and reducers are attached (sample input also). The code run just fine if i run via cat input.txt | python mapper.py | sort | python reducer.py Gives me the output but when i run it on clusters.. it throws an error which is not helpful (basically on the terminal it says job unsuccesful reason NA). Any suggestion on what am i doing wrong. Jamal |