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Date: Sun, 9 Nov 2008 10:14:49 +0530 (IST)
From: pols cut <pols_cut@yahoo.co.in>
Subject: error with inout for the Reduce method
To: core-user@hadoop.apache.org
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   I am trying to get a simple map reduce function going but getting the fo=
llowing error. could anyone please help/guide me =0A=0Afilename.java is not=
 abstract and does not override abstract method reduce<org.apache.io.text,j=
ava.util.iterator<org.apache.hadoop.io.text>,org.apache.hadoop.mapred.Outpu=
tCollector<org.apache.hadoop.io.Text.org.apache.hadoop.mapred.Reporter> in =
org.apache.hadoop.mapred.Reducer=0Apublic static class Reduce extends MapRe=
duceBase implements Reducer<Text,Text,Text,Text>=0A=0A=0AMy Map method is l=
ike this:=0Apublic static class map extends MapReduceBase implements Mapper=
<LongWritable, Text, Text, Text>=0A    {=0Apublic void map(LongWritable key=
, Text value, OutputCollector<Text, Text> output, Reporter reporter) throws=
 IOException=0A        {=0A output.collect(word_key,new Text(str1));  //out=
put.collect(Text,Text)=0A=0A            }=0A        =0A    }=0A=0Apublic st=
atic class Reduce extends MapReduceBase implements Reducer<Text, Text, Text=
, Text>=0A    {=0A=0A    public void Reduce(Text key, Iterator<Text> values=
, OutputCollector<Text, Text> output, Reporter reporter) throws IOException=
=0A       {=0A              output.collect(new Text("Test"), new Text("Me")=
);=0A=0A      }=0A   }=0A=0Aconfiguration is like :=0A=0A        conf.setMa=
pOutputKeyClass(Text.class);=0A        conf.setMapOutputValueClass(Text.cla=
ss);=0A        conf.setOutputKeyClass(Text.class);=0A        conf.setOutput=
ValueClass(Text.class);=0A=0A        conf.setMapperClass(map.class);=0A    =
    conf.setCombinerClass(Reduce.class);=0A        conf.setReducerClass(Red=
uce.class);=0A=0A        conf.setInputFormat(TextInputFormat.class);=0A    =
    conf.setOutputFormat(TextOutputFormat.class);=0A=0A=0A      Add more fr=
iends to your messenger and enjoy! Go to http://messenger.yahoo.com/invite/
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