Can we pass output of one reducer as input to anothor mapper ?

[DataFlair Team]

Can we pass output of one reducer as input to anothor mapper ? And is it correct way to do it ? Or we should first write mapreduce program seperatly and then write program to read output file of mapreduce ??

[DataFlair Team]

Yes we can pass output of one reducer to another mapper. While executing the application through command line we have to give the correct sequence of input and output files.This is exactly we have to do when we have multiple mapper and reducer classes.If you are using TextInputFormat to read the file then reducer output will be treated as key value pair for your mapper where each line offset from beginning of the file will be key and entire line will be value.

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