I have some code which is a standalone java application comprising of 30+ classes.

Most of these inherit from some other base classes.

Each and every class has this method to get and use a log4j logger

public static Logger getLogger() {
    if (logger != null) return logger;
    try {
        PropertyUtil propUtil = PropertyUtil.getInstance("app-log.properties");
        if (propUtil != null && propUtil.getProperties() != null)
            PropertyConfigurator.configure(propUtil.getProperties ());
        logger = Logger.getLogger(ExtractData.class);
        return logger;
    } catch (Exception exception) {
        exception.printStackTrace();
    }
}

A) My question is whether this should be refactored to some common logger which is initialized once and used across by all classes? Is that a better practice?

B) If yes, how can this be done ? How can I pass the logger around ?

C) This is actually being used in the code not as Logger.debug() but getLogger().debug(). What is the impact of this in terms of performance?