}

    public void test_beginWithRecordAndDiscard() {
        String key = "test";
        crawlerStatsHelper.begin(key);
        crawlerStatsHelper.record(key, "aaa");
        crawlerStatsHelper.discard(key);
        logger.info(localLogMsg.get());
        assertNull(localLogMsg.get());

        crawlerStatsHelper.done(key);
        logger.info(localLogMsg.get());
        assertNull(localLogMsg.get());

                buf.append('\t').append("error:").append(escapeValue(e.getLocalizedMessage()).replaceAll("\\s", " "));
                log(buf);
            }
        });
    }

    public void discard(final Object keyObj) {
        getCacheKey(keyObj).ifPresent(key -> {
            try {
                final StatsObject data = statsCache.getIfPresent(key);
                if (data != null) {