@Override
    public void incrementConcurrency() throws ZuulFilterConcurrencyExceededException {
        int limit = calculateConcurency();
        if (concurrencyProtectionEnabled.get() && (concurrentCount.get() >= limit)) {
            concurrencyRejections.increment();
            throw new ZuulFilterConcurrencyExceededException(this, limit);
        }
        concurrentCount.incrementAndGet();
    }
If true, the filter has been disabled by archaius and will not be run.
zuul-core/src/main/java/com/netflix/zuul/filters/BaseFilter.java