Program: 31904
Project: 31904
Buggy source:
/** 
 * initialize the columnConfig file
 * @throws IOException
 */
private int initColumnConfigList() throws IOException {
  String[] fields=null;
  boolean isSchemaProvided=true;
  if (StringUtils.isNotBlank(modelConfig.getHeaderPath())) {
    fields=CommonUtils.getHeaders(modelConfig.getHeaderPath(),modelConfig.getHeaderDelimiter(),modelConfig.getDataSet().getSource());
    String[] dataInFirstLine=CommonUtils.takeFirstLine(modelConfig.getDataSetRawPath(),modelConfig.getDataSetDelimiter(),modelConfig.getDataSet().getSource());
    if (fields.length != dataInFirstLine.length) {
      throw new IllegalArgumentException("String_Node_Str");
    }
  }
 else {
    fields=CommonUtils.takeFirstLine(modelConfig.getDataSetRawPath(),StringUtils.isBlank(modelConfig.getHeaderDelimiter()) ? modelConfig.getDataSetDelimiter() : modelConfig.getHeaderDelimiter(),modelConfig.getDataSet().getSource());
    if (StringUtils.join(fields,"String_Node_Str").contains(modelConfig.getTargetColumnName())) {
      isSchemaProvided=true;
      String[] dataInFirstLine=CommonUtils.takeFirstTwoLines(modelConfig.getDataSetRawPath(),StringUtils.isBlank(modelConfig.getHeaderDelimiter()) ? modelConfig.getDataSetDelimiter() : modelConfig.getHeaderDelimiter(),modelConfig.getDataSet().getSource())[1];
      if (dataInFirstLine != null && fields.length != dataInFirstLine.length) {
        throw new IllegalArgumentException("String_Node_Str");
      }
      log.warn("String_Node_Str");
      log.warn("String_Node_Str");
    }
 else {
      isSchemaProvided=false;
      log.warn("String_Node_Str");
      log.warn("String_Node_Str");
      log.warn("String_Node_Str");
    }
  }
  columnConfigList=new ArrayList<ColumnConfig>();
  for (int i=0; i < fields.length; i++) {
    ColumnConfig config=new ColumnConfig();
    config.setColumnNum(i);
    if (isSchemaProvided) {
      config.setColumnName(CommonUtils.getRelativePigHeaderColumnName(fields[i]));
    }
 else {
      config.setColumnName(i + "String_Node_Str");
    }
    columnConfigList.add(config);
  }
  CommonUtils.updateColumnConfigFlags(modelConfig,columnConfigList);
  boolean hasTarget=false;
  for (  ColumnConfig config : columnConfigList) {
    if (config.isTarget()) {
      hasTarget=true;
    }
  }
  if (!hasTarget) {
    log.error("String_Node_Str" + modelConfig.getTargetColumnName());
    if (StringUtils.isNotBlank(modelConfig.getHeaderPath())) {
      log.error("String_Node_Str",modelConfig.getDataSetRawPath());
    }
 else {
      log.error("String_Node_Str",modelConfig.getHeaderPath(),modelConfig.getHeaderDelimiter());
    }
    return 1;
  }
  return 0;
}

Fixed version (ground truth):
/** 
 * initialize the columnConfig file
 * @throws IOException
 */
private int initColumnConfigList() throws IOException {
  String[] fields=null;
  boolean isSchemaProvided=true;
  if (StringUtils.isNotBlank(modelConfig.getHeaderPath())) {
    fields=CommonUtils.getHeaders(modelConfig.getHeaderPath(),modelConfig.getHeaderDelimiter(),modelConfig.getDataSet().getSource());
    String[] dataInFirstLine=CommonUtils.takeFirstLine(modelConfig.getDataSetRawPath(),modelConfig.getDataSetDelimiter(),modelConfig.getDataSet().getSource());
    if (fields.length != dataInFirstLine.length) {
      throw new IllegalArgumentException("String_Node_Str" + fields.length + "String_Node_Str"+ dataInFirstLine.length+ "String_Node_Str");
    }
  }
 else {
    fields=CommonUtils.takeFirstLine(modelConfig.getDataSetRawPath(),StringUtils.isBlank(modelConfig.getHeaderDelimiter()) ? modelConfig.getDataSetDelimiter() : modelConfig.getHeaderDelimiter(),modelConfig.getDataSet().getSource());
    if (StringUtils.join(fields,"String_Node_Str").contains(modelConfig.getTargetColumnName())) {
      isSchemaProvided=true;
      String[] dataInFirstLine=CommonUtils.takeFirstTwoLines(modelConfig.getDataSetRawPath(),StringUtils.isBlank(modelConfig.getHeaderDelimiter()) ? modelConfig.getDataSetDelimiter() : modelConfig.getHeaderDelimiter(),modelConfig.getDataSet().getSource())[1];
      if (dataInFirstLine != null && fields.length != dataInFirstLine.length) {
        throw new IllegalArgumentException("String_Node_Str");
      }
      log.warn("String_Node_Str");
      log.warn("String_Node_Str");
    }
 else {
      isSchemaProvided=false;
      log.warn("String_Node_Str");
      log.warn("String_Node_Str");
      log.warn("String_Node_Str");
    }
  }
  columnConfigList=new ArrayList<ColumnConfig>();
  for (int i=0; i < fields.length; i++) {
    ColumnConfig config=new ColumnConfig();
    config.setColumnNum(i);
    if (isSchemaProvided) {
      config.setColumnName(CommonUtils.getRelativePigHeaderColumnName(fields[i]));
    }
 else {
      config.setColumnName(i + "String_Node_Str");
    }
    columnConfigList.add(config);
  }
  CommonUtils.updateColumnConfigFlags(modelConfig,columnConfigList);
  boolean hasTarget=false;
  for (  ColumnConfig config : columnConfigList) {
    if (config.isTarget()) {
      hasTarget=true;
    }
  }
  if (!hasTarget) {
    log.error("String_Node_Str" + modelConfig.getTargetColumnName());
    if (StringUtils.isNotBlank(modelConfig.getHeaderPath())) {
      log.error("String_Node_Str",modelConfig.getDataSetRawPath());
    }
 else {
      log.error("String_Node_Str",modelConfig.getHeaderPath(),modelConfig.getHeaderDelimiter());
    }
    return 1;
  }
  return 0;
}