how hystrix solve the dependency failure issue -

im new hystrix..going through below link

https://github.com/netflix/hystrix/wiki

so if dependencies(dependency services) isolated running in seperate threads , not allowing failure dependency use resource(ex:tomcat) ,the user requests on application fail of dependency service down right..

im not clear how solves problem of reducing down time of application..

please clarify...correct me if im wrong

you not have wait dying endpoint. can add fallback around issue of not having available healthy endpoint. hystrix keep on probing @ predefined rate check if service , ready serve in reasonable amount of time.