private static void loadLogConf() {
        try {
            String configFilePath = Configuration.getProp("log4j.path", "conf/log4j.properties");
            PropertyConfigurator.configure(configFilePath);
            setLogLevel();

            Logger.debug("Loading log4j from: [%s]", configFilePath);
        } catch (Exception e) {
            e.printStackTrace();
            Logger.warn("./log4j.properties does not exists in current dir, use default values");
        }
    }