What is the relation between zuul rate-limiting and hystrix isolation strategy?

[esolve]

I'm wondering the relation between zuul rate-limiting and hystrix isolation strategies. For example, since there is semaphore isolation settings by default, which limits the number of conccurrent outgoing requests, if this is below zuul rate-limiting threshold, I think zuul rate-limiting threshold won't take effect? so if we want marcosbarbero's spring-cloud-zuul-ratelimit take effect, we should set semaphore isolation threshold to a maximum value?

[github-actions]

Thanks for your question, we will get back to you asap!

[Marcos Barbero]

Hi @esolve, it has been a while since I last used Hystrix, but as far as I remember, Hystrix works on the routing phase, in this case, could be Ribbon doing it. This library here only adds ZuulFilters that runs before or after the routing.