Program: 39100
Project: 39100
Buggy source:
public void performDataPurging(){
  List<String> labelList=new ArrayList<>();
  String rowLimit=null;
  String backupFileLocation=null;
  long backupDurationInDays=0;
  String backupFileName=null;
  JsonObject configJsonObj=getSettingsJsonObject();
  if (configJsonObj != null) {
    JsonArray array=configJsonObj.get("String_Node_Str").getAsJsonArray();
    if (array != null) {
      for (int i=0; i < array.size(); i++) {
        labelList.add(array.get(i).getAsString());
      }
    }
    rowLimit=configJsonObj.get(ConfigOptions.ROW_LIMIT).getAsString();
    backupFileLocation=configJsonObj.get(ConfigOptions.BACKUP_FILE_LOCATION).getAsString();
    backupFileName=configJsonObj.get(ConfigOptions.BACKUP_FILE_NAME).getAsString();
    backupDurationInDays=configJsonObj.get(ConfigOptions.BACKUP_DURATION_IN_DAYS).getAsLong();
  }
  long epochTime=InsightsUtils.getTimeBeforeDays(backupDurationInDays);
  Neo4jDBHandler dbHandler=new Neo4jDBHandler();
  for (  String label : labelList) {
    int splitlength=0;
    boolean deleteFlag=true;
    try {
      int count=getNodeCount(dbHandler,label,epochTime);
      while (splitlength < count) {
        GraphResponse response=executeCypherQuery(label,rowLimit,splitlength,epochTime);
        String localDateTime=InsightsUtils.getLocalDateTime("String_Node_Str");
        String location=backupFileLocation + File.separator + backupFileName+ "String_Node_Str"+ splitlength+ "String_Node_Str"+ localDateTime+ "String_Node_Str";
        writeToCSVFile(response,location);
        splitlength=splitlength + Integer.parseInt(rowLimit);
      }
    }
 catch (    GraphDBException|IOException e) {
      log.error("String_Node_Str" + e);
      deleteFlag=false;
    }
    if (deleteFlag) {
      String deleteQry="String_Node_Str" + label + "String_Node_Str"+ epochTime+ "String_Node_Str";
      try {
        dbHandler.executeCypherQuery(deleteQry);
      }
 catch (      GraphDBException e) {
        log.error("String_Node_Str" + label + "String_Node_Str"+ e);
      }
    }
  }
}

Fixed version (ground truth):
public void performDataPurging(){
  List<String> labelList=new ArrayList<>();
  String rowLimit=null;
  String backupFileLocation=null;
  long backupDurationInDays=0;
  String backupFileName=null;
  JsonObject configJsonObj=getSettingsJsonObject();
  if (configJsonObj != null) {
    JsonArray array=configJsonObj.get("String_Node_Str").getAsJsonArray();
    if (array != null) {
      for (int i=0; i < array.size(); i++) {
        labelList.add(array.get(i).getAsString());
      }
    }
    rowLimit=configJsonObj.get(ConfigOptions.ROW_LIMIT).getAsString();
    backupFileLocation=configJsonObj.get(ConfigOptions.BACKUP_FILE_LOCATION).getAsString();
    backupFileName=configJsonObj.get(ConfigOptions.BACKUP_FILE_NAME).getAsString();
    backupDurationInDays=configJsonObj.get(ConfigOptions.BACKUP_DURATION_IN_DAYS).getAsLong();
  }
  long epochTime=InsightsUtils.getTimeBeforeDaysInSeconds(backupDurationInDays);
  Neo4jDBHandler dbHandler=new Neo4jDBHandler();
  for (  String label : labelList) {
    int splitlength=0;
    boolean deleteFlag=true;
    try {
      int count=getNodeCount(dbHandler,label,epochTime);
      while (splitlength < count) {
        GraphResponse response=executeCypherQuery(label,rowLimit,splitlength,epochTime);
        String localDateTime=InsightsUtils.getLocalDateTime("String_Node_Str");
        String location=backupFileLocation + File.separator + backupFileName+ "String_Node_Str"+ splitlength+ "String_Node_Str"+ localDateTime+ "String_Node_Str";
        writeToCSVFile(response,location);
        splitlength=splitlength + Integer.parseInt(rowLimit);
      }
    }
 catch (    GraphDBException|IOException e) {
      log.error("String_Node_Str" + e);
      deleteFlag=false;
    }
    if (deleteFlag) {
      String deleteQry="String_Node_Str" + label + "String_Node_Str"+ epochTime+ "String_Node_Str";
      try {
        dbHandler.executeCypherQuery(deleteQry);
      }
 catch (      GraphDBException e) {
        log.error("String_Node_Str" + label + "String_Node_Str"+ e);
      }
    }
  }
}