-How to get mapper counters (or equivalents) in reducer
Jianhui Zhang 2012-04-30, 19:02
Version: Hadoop 0.20.205.
My reducer can be optimized if I can get a good estimate on how many
records are produced by the mappers, that is, if I can get the
MAP_OUTPUT_RECORDS counter (or its equivalent) in my reducer. However,
I tried and always got 0, guess the counters are not passed to the
Anybody has encountered the same requirement? And any pointers on that?
Appreciate your help.