When app start up, DynamicServerListLoadBalancer list of Servers is always null #4

I use feignclient with eureka， server A need to call service B use feign , when service A start up, the first call to service B is always fail.
I find that the loadbalancer has no server, and then "Using serverListUpdater PollingServerListUpdater", I think it is better to pollingserver list when Server A start up .