if (logger.isDebugEnabled()) {
                    logger.debug("Exception on SID processing.", e);
                }
            }
        }
    }

    /**
     * Preprocesses the URI before processing the request.
     *
     * @param uri the URI to preprocess
     * @return the preprocessed URI
     * @throws CrawlerSystemException if the URI is empty
     */

                if (logger.isDebugEnabled()) {
                    logger.debug("Exception on SID processing.", e);
                }
            }
        }
    }

    /**
     * Preprocesses the URI before processing the request.
     *
     * @param uri the URI to preprocess
     * @return the preprocessed URI
     * @throws CrawlerSystemException if the URI is empty
     */