#vulnerable code 
                                public void map(IntWritable key, WeightedVectorWritable value,
            OutputCollector<Text, Text> output, Reporter reporter)
            throws IOException {
        Vector v = value.getVector();
        if (v instanceof NamedVector) {
            String name = ((NamedVector) v).getName();
            if (name != null & name.length() > 2)
                output.collect(new Text(name), new Text(key.toString()));
            else
                reporter.incrCounter(CLUSTER_DOC_ID_DUMPER, "Missing name", 1);
        } else
            reporter.incrCounter(CLUSTER_DOC_ID_DUMPER, "Unnamed vector", 1);
    } 
                            #location 7 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                public void map(IntWritable key, WeightedVectorWritable value,
            OutputCollector<Text, Text> output, Reporter reporter)
            throws IOException {
        Vector v = value.getVector();
        if (v instanceof NamedVector) {
            String name = ((NamedVector) v).getName();
            if (name != null && name.length() > 2)
                output.collect(new Text(name), new Text(key.toString()));
            else
                reporter.incrCounter(CLUSTER_DOC_ID_DUMPER, "Missing name", 1);
        } else
            reporter.incrCounter(CLUSTER_DOC_ID_DUMPER, "Unnamed vector", 1);
    }