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From "Edward J. Yoon (JIRA)" <>
Subject [jira] Created: (HAMA-63) DenseVector seems can't be writable
Date Thu, 18 Sep 2008 06:59:44 GMT
DenseVector seems can't be writable 

                 Key: HAMA-63
             Project: Hama
          Issue Type: Improvement
          Components: mapred 
            Reporter: Edward J. Yoon
            Assignee: Edward J. Yoon
             Fix For: 0.1.0

DenseVector have an operation methods. BTW, it will be overwrited by while
run on the map/reduce. So, first.equals(second) returns true as below. It's a problematic.

  public void reduce(IntWritable key, Iterator<DenseVector> values,
      OutputCollector<IntWritable, VectorUpdate> output, Reporter reporter)
      throws IOException {

    DenseVector first =; 
    DenseVector second =;
    first.equals(second); // true

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