}

        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final long windowMs = fessConfig.getRateLimitWindowMsAsInteger().longValue();
        final long blockDurationMs = fessConfig.getRateLimitBlockDurationMsAsInteger().longValue();

        requestCounters = CacheBuilder.newBuilder().expireAfterWrite(windowMs, TimeUnit.MILLISECONDS).maximumSize(10000).build();