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404 responses when a new Marathon leader is elected #653
The problem: I am running a lot of apps in my Marathon cluster, +200 and when a leader is elected it actually runs healthchecks for all tasks, so it starts with 0 healthchecked apps and starts to check every task and populating data about the results. Meantime, Traefik thinks I don't have my apps anymore, because it assumes if I don't have healthchecks, it's unhealthy. That's untrue, because my apps are still there, Marathon just didn't had enough time to check all of then.
So, Traefik should not consider the absence of a healthcheck the same as not healthy.