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Tag: mapreduce

Duplicate “values” for some key in map-reduce java program

I am new in mapreduce and hadoop (hadoop 3.2.3 and java 8). I am trying to separate some lines based on a symbol in a line. Example: “q1,a,q0,” should be return (‘a’,”q1,a,q0,”) as (key, value). My dataset contains ten(10) lines , five(5) for key ‘a’ and five for key ‘b’. I expect to get 5 line for each key but

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