// (sequentially-number integer). If it doesn't exist create it.
Path mappingFile = env.getDocnoMappingData();
if (!fs.exists(mappingFile)) {
sLogger.info(mappingFile + " doesn't exist, creating...");
String[] arr = new String[] { collection, indexPath + "/medline-docid-tmp", mappingFile.toString(), new Integer(numMappers).toString() };
NumberMedlineCitations tool = new NumberMedlineCitations();
tool.setConf(conf);
tool.run(arr);
fs.delete(new Path(indexPath + "/medline-docid-tmp"), true);
}
// Now we're ready to start the preprocessing pipeline... set