错误：java.lang.IllegalArgumentException: no server available
详细错误：
1 2020-05-17 21:42:43.906 ERROR 14012 --- [ main] c.a.c.n.registry.NacosServiceRegistry : nacos registry, mgymall-gateway register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='', endpoint='', namespace='', watchDelay=30000, logName='', service='mgymall-gateway', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.214.1', networkInterface='', port=88, secure=false, accessKey='', secretKey=''}}, 2 3 java.lang.IllegalArgumentException: no server available 4 at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:438) ~[nacos-client-1.1.1.jar:na] 5 at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386) ~[nacos-client-1.1.1.jar:na] 6 at com.alibaba.nacos.client.naming.net.NamingProxy.registerService(NamingProxy.java:188) ~[nacos-client-1.1.1.jar:na] 7 at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:205) ~[nacos-client-1.1.1.jar:na] 8 at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:184) ~[nacos-client-1.1.1.jar:na] 9 at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.register(NacosServiceRegistry.java:61) ~[spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:2.1.0.RELEASE] 10 at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:239) [spring-cloud-commons-2.1.3.RELEASE.jar:2.1.3.RELEASE] 11 at com.alibaba.cloud.nacos.registry.NacosAutoServiceRegistration.register(NacosAutoServiceRegistration.java:74) [spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:2.1.0.RELEASE] 12 at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:138) [spring-cloud-commons-2.1.3.RELEASE.jar:2.1.3.RELEASE] 13 at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:101) [spring-cloud-commons-2.1.3.RELEASE.jar:2.1.3.RELEASE] 14 at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:88) [spring-cloud-commons-2.1.3.RELEASE.jar:2.1.3.RELEASE] 15 at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47) [spring-cloud-commons-2.1.3.RELEASE.jar:2.1.3.RELEASE] 16 at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) [spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE] 17 at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) [spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE] 18 at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) [spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE] 19 at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:402) [spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE] 20 at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:359) [spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE] 21 at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.finishRefresh(ReactiveWebServerApplicationContext.java:118) [spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE] 22 at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:552) [spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE] 23 at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.refresh(ReactiveWebServerApplicationContext.java:66) [spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE] 24 at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:744) [spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE] 25 at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:391) [spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE] 26 at org.springframework.boot.SpringApplication.run(SpringApplication.java:312) [spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE] 27 at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE] 28 at org.springframework.boot.SpringApplication.run(SpringApplication.java:1204) [spring-boot-2.1.8.RELEASE.jar:2.1.8.RELEASE] 29 at com.mgy.mgymall.gateway.MgymallGatewayApplication.main(MgymallGatewayApplication.java:17) [classes/:na]
原因：可能是因为你加了nacos服务发现的依赖，但是没有在bootstrap.yml中配置
加了：
1 <!-- 服務註冊/發現 --> 2 <dependency> 3 <groupId>com.alibaba.cloud</groupId> 4 <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId> 5 </dependency>
没有加：
1 spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848