src/main/java/com/alipay/remoting/ConnectionEventHandler.java
private void infoLog(String format, String addr) {
        if (logger.isInfoEnabled()) {
            if (StringUtils.isNotEmpty(addr)) {
                logger.info(format, addr);
            } else {
                logger.info(format, "UNKNOWN-ADDR");
            }
        }
    }
private void infoLog(String format, String addr) {
        if (logger.isInfoEnabled()) {
            if (StringUtils.isNotEmpty(addr)) {
                logger.info(format, addr);
            } else {
                logger.info(format, "UNKNOWN-ADDR");
            }
        }
    }
print info log
@param format
@param addr