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From Anurup Pavuluri <apavu...@andrew.cmu.edu>
Subject Collecting text in output
Date Fri, 08 Dec 2006 00:57:43 GMT


In my Map function I am collecting Text as the output. When I run the 
job the job gives a java.io.IOException. The following code is exactly 
what I am doing. Did someone else have a similar problem with Text? It 
works for IntWritable instead of Text.

    private Text word = new Text();

    public void map(WritableComparable key, Writable value,
        OutputCollector output,
        Reporter reporter) throws IOException {
        String line = ((Text)value).toString();
        StringTokenizer itr = new StringTokenizer(line);
        for(int i=0; i<3; i++)
        String ipAddress = itr.nextToken();
        ipAddress = ipAddress.trim();
        output.collect(word, word);

  public static class Reduce extends MapReduceBase implements Reducer {

    public void reduce(WritableComparable key, Iterator values,
        OutputCollector output,
        Reporter reporter) throws IOException {
        int sum = 0;
        Text word = new Text();
      while (values.hasNext()) {
        sum += ((IntWritable) values.next()).get();
        output.collect(key, word);

-- Anurup Pavuluri Graduate Student Information Networking Institute, 
Carnegie Mellon University. E-Mail: apavulur@andrew.cmu.edu Phone: 412 
726 7193(M)

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