if (cause != null) {
                errorName = cause.getClass().getCanonicalName();
            } else {
                errorName = e.getClass().getCanonicalName();
            }
            storeFailureUrl(crawlerContext, urlQueue, errorName, e);
        } catch (final ContainerNotAvailableException e) {
            if (logger.isDebugEnabled()) {
                logger.debug("container was destroyed.");
            }