API:127.0.01:8844/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection ref

ERROR [com.alibaba.nacos.client.naming:454] – [uuid=] [token=] – request 127.0.0.1:8844 failed. ErrCode:500, ErrMsg:failed to req API:127.0.01:8844/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused

遇到这种错误有

以下几种方法解决

1、如果是集群 重启一定要用这个命令：sh startup.sh -p 8848 -m standalone否则继续报错

2、删除nacos文件夹下的data文件夹