问题描述

安装nacos2.0以上版本，启动报错:com.alibaba.nacos.api.exception.NacosException: Request nacos server failed

com.alibaba.nacos.api.exception.NacosException: Request nacos server failed: 
	at com.alibaba.nacos.client.naming.remote.gprc.NamingGrpcClientProxy.requestToServer(NamingGrpcClientProxy.java:288) ~[nacos-client-2.1.0.jar:na]
	at com.alibaba.nacos.client.naming.remote.gprc.NamingGrpcClientProxy.doUnsubscribe(NamingGrpcClientProxy.java:259) ~[nacos-client-2.1.0.jar:na]
	at com.alibaba.nacos.client.naming.remote.gprc.NamingGrpcClientProxy.unsubscribe(NamingGrpcClientProxy.java:240) ~[nacos-client-2.1.0.jar:na]
	at com.alibaba.nacos.client.naming.remote.NamingClientProxyDelegate.unsubscribe(NamingClientProxyDelegate.java:157) ~[nacos-client-2.1.0.jar:na]
	at com.alibaba.nacos.client.naming.NacosNamingService.unsubscribe(NacosNamingService.java:417) ~[nacos-client-2.1.0.jar:na]
	at com.alibaba.cloud.nacos.discovery.NacosWatch.stop(NacosWatch.java:177) [spring-cloud-starter-alibaba-nacos-discovery-2.2.8.RELEASE.jar:2.2.8.RELEASE]
	at com.alibaba.cloud.nacos.discovery.NacosWatch.destroy(NacosWatch.java:207) [spring-cloud-starter-alibaba-nacos-discovery-2.2.8.RELEASE.jar:2.2.8.RELEASE]
	at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:199) [spring-beans-5.2.15.RELEASE.jar:5.2.15.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:587) [spring-beans-5.2.15.RELEASE.jar:5.2.15.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:559) [spring-beans-5.2.15.RELEASE.jar:5.2.15.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1092) [spring-beans-5.2.15.RELEASE.jar:5.2.15.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:520) [spring-beans-5.2.15.RELEASE.jar:5.2.15.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1085) [spring-beans-5.2.15.RELEASE.jar:5.2.15.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1061) [spring-context-5.2.15.RELEASE.jar:5.2.15.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:564) [spring-context-5.2.15.RELEASE.jar:5.2.15.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:755) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:402) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:312) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1247) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1236) [spring-boot-2.3.12.RELEASE.jar:2.3.12.RELEASE]
	at com.zatech.provider.ProviderApplication.main(ProviderApplication.java:20) [classes/:na]
Caused by: com.alibaba.nacos.api.exception.NacosException: Client not connected, current status:STARTING
	at com.alibaba.nacos.common.remote.client.RpcClient.request(RpcClient.java:651) ~[nacos-client-2.1.0.jar:na]
	at com.alibaba.nacos.common.remote.client.RpcClient.request(RpcClient.java:631) ~[nacos-client-2.1.0.jar:na]
	at com.alibaba.nacos.client.naming.remote.gprc.NamingGrpcClientProxy.requestToServer(NamingGrpcClientProxy.java:278) ~[nacos-client-2.1.0.jar:na]
	... 22 common frames omitted

原因：nacos2.0以上版本相比1.X新增了gRPC的通信方式

解决方案：启动时增加9848端口，并注意开放服务器的9848端口

firewall-cmd --zone=public --add-port=9848/tcp --permanent

firewall-cmd --reload