throw new CrawlingAccessException("I/O exception(" + e.getMessage() + "): " + url, e);
        } catch (final CrawlerSystemException e) {
            closeResources(httpRequest, responseData);
            throw e;
        } catch (final Exception e) {
            closeResources(httpRequest, responseData);
            throw new CrawlerSystemException("Failed to access " + url, e);