DMwangnima opened a new issue, #2430: URL: https://github.com/apache/dubbo-go/issues/2430
### Environment <!-- - Server: Dubbo-go, v3.0.5 - Client: Dubbo-go, v3.0.5 - Protocol: Triple - Registry: Nacos, v2.0.0 --> - Server: Dubbo-go, v3.0.1 - Client: Dubbo-go, v3.0.1 - Protocol: dubbo - Registry: zookeeper ### Issue description **Invoking Process:** 1. ZookeeperServiceDiscovery.DataChange => (1) GetInstances Get the latest instance of this service. Because of the service not actually calling **UnRegister** (refer to graceful_shutdown) when the service shuts down, but waits for the ephemeral node to be removed by the zookeeper node, there is a probability of obtaining the offline instance. (2) ServiceInstanceChangedListenerImpl.OnEvent Callback. Returning instances to ServiceInstanceChangedListernerImpl. 2. ServiceInstanceChangedListenerImpl.OnEvent => (1) RegistryDirectory.NotifyAll Callback. Returning urls of instances to RegistryDirectory 3. RegistryDirectory.NotifyAll <img width="738" alt="image" src="https://github.com/apache/dubbo-go/assets/33331974/4f4e2d00-7367-47ff-9d0c-2e1b5aec0e35";> **refreshAllInvokers** is executed asynchronously, in which the assembly of the invoker is performed. In a large-scale offline scenario, the offline of each instance will trigger the entire process. **NotifyAll** is also called several times, and the order of calls between multiple **refreshAllInvokers** cannot be guaranteed. There may be calls to offline services. This bug refers to https://github.com/apache/dubbo-go/issues/2328. ### Logs <details><summary>Click me to check logs</summary> ``` Copy logs to here. ``` </details> -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
