I want to log my System.out.println() in console

How to do that= .

I did= the below code but it is not displaying any thing. I am using mapred api t= he old one.

Did i do anything wrong?

Code

-------------------------= -----------------------------------

<= /div>

packag= e tech;

<= font face=3D"verdana, sans-serif">import java.io.IOException;

<= div class=3D"gmail_default"> import java.io.OutputStreamWriter;

impo= rt java.util.ArrayList;

import java.util.Iterator;

import java= .util.StringTokenizer;

import org.apache.hadoop.conf.Configuration;=

import org.= apache.hadoop.fs.FileSystem;

import org.apache.hadoop.fs.Path;

import org.apache.hadoop.io.IntWritable;=

import org.apache.hadoop.mapred.MapRed= uceBase;

import org.= apache.hadoop.mapred.OutputCollector;

import org.apache.hadoop.mapred.Redu= cer;

import org.= apache.hadoop.mapred.Reporter;

import com.sun.org.apache.commons.logging.L= ogFactory;

publi= c =A0class Reduce extends MapReduceBase

implements Reducer<Text, IntWri= table, Text, IntWritable> {

static int cnt =3D0;

ArrayList<String> ar =3D new ArrayList<String>();

<= span class=3D"" style=3D"white-space:pre"> String data =3D null;

public static final com.su= n.org.apache.commons.logging.Log LOG =3D LogFactory.getLog(Reduce.class);

=
public void reduce(Text key, = Iterator<IntWritable> values,

OutputCollector<Text, IntWrita= ble> output,
Repor= ter reporter) throws IOException {

=
System.out.println= ("In reducer");

LOG.info("In Reducer"= );

int sum =3D 0;=
String line =3D key.toString= ();

StringTokenizer itr =3D new String= Tokenizer(line);
while= (values.hasNext()) {

sum +=3D values.next().get();
}

output.collect(key, new IntWritabl= e(sum));
String data = =3D key+" "+sum;

ar.add(data);
writeToFile(ar);

System.out.println("Wrote to = file");

if(LOG.isDebugEnabled()){
= LOG.debug("Log= : In Reducer");

}

ar.add(&q= uot;\n");

int index=3DInteger.parseInt(itr.n= extToken());
String va= lue=3Ditr.nextToken();

String classLabel=3Ditr.nextToken(= );
int count=3Dsum;

=
}

public static void writeToFile(ArrayList<String&= gt; =A0text) throws IOException {

System.out.println("In reduce= write to file ");

C45 id=3Dnew C45();

System.out.println("count &q= uot;+cnt);

Path input =3D new P= ath("C45/intermediate"+id.current_index+".txt");=

Configuration conf =3D new Config= uration();
FileSystem= fs =3D FileSystem.get(conf);

BufferedWriter bw =3D new Buffere= dWriter(new
=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 = =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 OutputStreamWriter(fs.create(in= put, true)));

for(String str: text) {
bw.write(str);

}
bw.newLine();

bw.close();

}

}
1. And how to log details: if = my reducer data goes into function writeToFile() and creates the fil= e in hdfs.

--
Thanks &a= mp; Regards

Unmesha Sreeveni U.B
Junior Developer

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