Program: 8443
Project: 8443
Buggy source:
/** 
 * This method will check whether the download.json file got modified and download all the files in download.json
 */
public static void checkForDownloads(){
  LOGGER.entering();
  File downloadFile=new File(SeLionGridConstants.DOWNLOAD_JSON_FILE);
  if (lastModifiedTime == downloadFile.lastModified()) {
    return;
  }
  lastModifiedTime=downloadFile.lastModified();
  cleanup();
  LOGGER.info("String_Node_Str" + Platform.getCurrent());
  List<URLChecksumEntity> artifactDetails=new ArrayList<ArtifactDetails.URLChecksumEntity>();
  try {
    artifactDetails=ArtifactDetails.getArtifactDetailsForCurrentPlatform(downloadFile);
  }
 catch (  IOException e) {
    LOGGER.log(Level.SEVERE,"String_Node_Str",e);
    throw new RuntimeException(e);
  }
  for (Iterator<URLChecksumEntity> iterator=artifactDetails.iterator(); iterator.hasNext(); ) {
    URLChecksumEntity entity=(URLChecksumEntity)iterator.next();
    String url=entity.getUrl().getValue();
    String checksum=entity.getChecksum().getValue();
    StringBuilder msg=new StringBuilder();
    msg.append("String_Node_Str").append(url).append("String_Node_Str");
    msg.append("String_Node_Str").append(checksum).append("String_Node_Str");
    LOGGER.info(msg.toString());
    String result;
    while ((result=downloadFile(url,checksum)) == null) {
      LOGGER.warning("String_Node_Str" + url + "String_Node_Str");
    }
    files.add(result);
    if (!result.endsWith("String_Node_Str")) {
      List<String> extractedFileList=FileExtractor.extractArchive(result);
      files.addAll(extractedFileList);
    }
  }
  LOGGER.info("String_Node_Str" + files.toString());
  LOGGER.exiting();
}

Fixed version (ground truth):
/** 
 * This method will check whether the download.json file got modified and download all the files in download.json
 */
static void checkForDownloads(){
  LOGGER.entering();
  File downloadFile=new File(SeLionGridConstants.DOWNLOAD_JSON_FILE);
  if (lastModifiedTime == downloadFile.lastModified()) {
    return;
  }
  lastModifiedTime=downloadFile.lastModified();
  cleanup();
  LOGGER.info("String_Node_Str" + Platform.getCurrent());
  List<URLChecksumEntity> artifactDetails=new ArrayList<ArtifactDetails.URLChecksumEntity>();
  try {
    artifactDetails=ArtifactDetails.getArtifactDetailsForCurrentPlatform(downloadFile);
  }
 catch (  IOException e) {
    LOGGER.log(Level.SEVERE,"String_Node_Str",e);
    throw new RuntimeException(e);
  }
  for (Iterator<URLChecksumEntity> iterator=artifactDetails.iterator(); iterator.hasNext(); ) {
    URLChecksumEntity entity=(URLChecksumEntity)iterator.next();
    String url=entity.getUrl().getValue();
    String checksum=entity.getChecksum().getValue();
    StringBuilder msg=new StringBuilder();
    msg.append("String_Node_Str").append(url).append("String_Node_Str");
    msg.append("String_Node_Str").append(checksum).append("String_Node_Str");
    LOGGER.fine(msg.toString());
    String result;
    while ((result=downloadFile(url,checksum)) == null) {
      LOGGER.warning("String_Node_Str" + url + "String_Node_Str");
    }
    files.add(result);
    if (!result.endsWith("String_Node_Str")) {
      List<String> extractedFileList=FileExtractor.extractArchive(result);
      files.addAll(extractedFileList);
    }
  }
  LOGGER.fine("String_Node_Str" + files.toString());
  LOGGER.exiting();
}