hadoop-common-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Jeff Zhang <zjf...@gmail.com>
Subject Re: Identity Reducer
Date Fri, 12 Feb 2010 01:19:38 GMT
I guess you are using org.apache.hadoop.mapreduce.Mapper which is a class
for hadoop new API. you can use the org.apache.hadoop.mapred.Mapper which is
for old API



On Thu, Feb 11, 2010 at 5:10 PM, Prabhu Hari Dhanapal <
dragonzsnake@gmail.com> wrote:

> Hi all,
>
> I m trying to Write a program that performs some simple Datamining on a
> certain DataSet. I was told that an Identity Reducer should be written.
>
> public class Reduce extends MapReduceBase implements Reducer {
>
> public void reduce(Text key, Iterator<IntWritable>
> values,OutputCollector<Text, IntWritable> output,
>  Reporter reporter) throws IOException {
>
> ===>
> It shows me the following exception  ..
>
> "The type Reducer cannot be a superinterface of Reduce; a superinterface
> must be an interface "
> Can I have some pointers on solving this?
>
>
> --
> Hari
>



-- 
Best Regards

Jeff Zhang

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message