jack15083 commented on issue #1100:
URL: https://github.com/apache/dubbo-go/issues/1100#issuecomment-806524904
> pls check pr #1092
> ```
> // Notify monitor changes from registry,and update the cacheServices
> func (dir *RegistryDirectory) Notify(event *registry.ServiceEvent) {
> if event == nil {
> return
> }
> go dir.refreshInvokers(event)
> }
> ```
>
> 此处的Notify函数直接启用协程处理，个人感觉不是太恰当，尤其对于同一地址和端口的同一interface，上线和下线是应该需要考虑时序的。
这段代码可能是有问题的，有可能先执行的上线通知后执行的下线通知，这样的话就可能会导致consumer调用provider服务失败
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