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From ShiYu <sh...@uchicago.edu>
Subject Re: Combiner and MultipleOutputs in Mapreduce
Date Wed, 06 Oct 2010 04:55:23 GMT

Okay, I found a solution to my second problem.  

Beside of using   collector.collect(keyText, value) to generate the multiple
output, I still have to commit the same output to the output
output.collect(key,value), only in this way the data can be exchanged
between the Combiner and the Reducer. 

But the first question sill remains, how to set up combiner when input is
<K2,V2> while output is <K3,V3>?
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