>>>>>>>>>>>> Code: SegmentMerger.java patch >>>>>>>>>>>> 

  private void mergeNorms() throws IOException {
    for (int i = 0; i < fieldInfos.size(); i++) {
      FieldInfo fi = fieldInfos.fieldInfo(i);
      if (fi.isIndexed) {
        OutputStream output = directory.createFile(segment + ".f" + i);
        try {
          for (int j = 0; j < readers.size(); j++) {
            IndexReader reader = (IndexReader) readers.elementAt(j);
            //byte[] input = reader.norms(fi.name);
            int maxDoc = reader.maxDoc();
            byte[] input = new byte[maxDoc];
            reader.norms(fi.name, input, 0);

            for (int k = 0; k < maxDoc; k++) {
              byte norm = input != null ? input[k] : (byte) 0;
              if (!reader.isDeleted(k)) {
                output.writeByte(norm);
              }
            }
          }
        } finally {
          output.close();
        }
      }
    }
  }

>>>>>>>>>>>> Inputs >>>>>>>>>>>> 

7.2G    index0
7.0G    index1
5.8G    index3
5.8G    index4
4.2G    index5
5.3G    index6
5.8G    index7
6.0G    index8
4.8G    index9
52G     .

>>>>>>>>>>>> Tests >>>>>>>>>>>> 

#1 java -Xms700M -Xmx700M MergeTest index0 index1
	result -> 13G success

#2 java -Xms700M -Xmx700M MergeTest index0 index1 index3
	result -> 18G success

#3 java -Xms700M -Xmx700M MergeTest index0 index1 index3 index4
	result -> 24G success
	
#4 java -Xms700M -Xmx700M MergeTest index0 index1 index4 index5
	result -> 22G success

#5 java -Xms700M -Xmx700M MergeTest index0 index1 index3 index4 index5
	result -> 27G success

#6 java -Xms700M -Xmx700M MergeTest index0 index1 index3 index4 index5 index6
	result -> 32G success

#7 java -Xms700M -Xmx700M MergeTest index0 index1 index3 index4 index5 index6 index7
	result -> 37G success

#8 java -Xms700M -Xmx700M MergeTest index0 index1 index3 index4 index5 index6 index7 index8
	result -> 43G success