Program: 124722
Project: 124722
Buggy source:
@Override public ExecutionResult execute(Item item){
  ILibraryManagerService libService=null;
  if (GlobalServiceRegister.getDefault().isServiceRegistered(ILibraryManagerService.class)) {
    libService=(ILibraryManagerService)GlobalServiceRegister.getDefault().getService(ILibraryManagerService.class);
  }
  if (libService == null) {
    return ExecutionResult.NOTHING_TO_DO;
  }
  if (item instanceof HadoopClusterConnectionItem) {
    HadoopClusterConnectionItem hcItem=(HadoopClusterConnectionItem)item;
    HadoopClusterConnection connection=(HadoopClusterConnection)hcItem.getConnection();
    if (connection.getConfFile() == null) {
      String confJarName=HadoopParameterUtil.getConfsJarDefaultName(hcItem.getProperty().getId());
      if (!libService.contains(confJarName)) {
        return ExecutionResult.NOTHING_TO_DO;
      }
      File confsTempFolder=new File(HadoopConfsUtils.getConfsJarTempFolder());
      boolean retrieved=libService.retrieve(confJarName,confsTempFolder.getAbsolutePath(),false);
      File confJarFile=new File(confsTempFolder,confJarName);
      if (retrieved && confJarFile.exists()) {
        try {
          connection.setConfFile(FileUtils.readFileToByteArray(confJarFile));
          ProxyRepositoryFactory.getInstance().save(hcItem,true);
          return ExecutionResult.SUCCESS_WITH_ALERT;
        }
 catch (        Exception e) {
          ExceptionHandler.process(e);
          return ExecutionResult.FAILURE;
        }
      }
    }
  }
  return ExecutionResult.NOTHING_TO_DO;
}

Fixed version (ground truth):
@Override public ExecutionResult execute(Item item){
  ILibraryManagerService libService=null;
  if (GlobalServiceRegister.getDefault().isServiceRegistered(ILibraryManagerService.class)) {
    libService=(ILibraryManagerService)GlobalServiceRegister.getDefault().getService(ILibraryManagerService.class);
  }
  if (libService == null) {
    return ExecutionResult.NOTHING_TO_DO;
  }
  if (item instanceof HadoopClusterConnectionItem) {
    HadoopClusterConnectionItem hcItem=(HadoopClusterConnectionItem)item;
    HadoopClusterConnection connection=(HadoopClusterConnection)hcItem.getConnection();
    if (connection.getConfFile() == null) {
      String confJarName=HadoopParameterUtil.getConfsJarDefaultName(hcItem.getProperty().getId());
      if (!libService.contains(confJarName)) {
        return ExecutionResult.NOTHING_TO_DO;
      }
      File confsTempFolder=new File(HadoopConfsUtils.getConfsJarTempFolder());
      boolean retrieved=libService.retrieve(confJarName,confsTempFolder.getAbsolutePath(),false);
      File confJarFile=new File(confsTempFolder,confJarName);
      if (retrieved && confJarFile.exists()) {
        try {
          connection.setConfFile(FileUtils.readFileToByteArray(confJarFile));
          ProxyRepositoryFactory.getInstance().save(hcItem,true);
          String newConfJarName=HadoopParameterUtil.getConfsJarDefaultName(hcItem.getProperty().getLabel());
          HadoopConfsUtils.removeFromDeployedCache(hcItem,newConfJarName);
          return ExecutionResult.SUCCESS_WITH_ALERT;
        }
 catch (        Exception e) {
          ExceptionHandler.process(e);
          return ExecutionResult.FAILURE;
        }
      }
    }
  }
  return ExecutionResult.NOTHING_TO_DO;
}