com.alibaba..api.exception.NacosException: endpoint is blank com.alibaba.nacos.api.exception.NacosException: java.lang.reflect.InvocationTargetException
com.alibaba.nacos.api.exception.NacosException: endpoint is blank
com.alibaba.nacos.api.exception.NacosException: java.lang.reflect.InvocationTargetException)
异常信息
springCloud alibaba 配置Nacos企业管理系统定制开发启动服务后，会报错
com.alibaba.nacos.api.exception.NacosException: java.lang.reflect.InvocationTargetException at com.alibaba.nacos.api.config.ConfigFactory.createConfigService(ConfigFactory.java:45) ~[nacos-api-1.1.1.jar:na] at com.alibaba.nacos.api.NacosFactory.createConfigService(NacosFactory.java:43) ~[nacos-api-1.1.1.jar:na] at com.alibaba.cloud.nacos.NacosConfigProperties.configServiceInstance(NacosConfigProperties.java:346) ~[spring-cloud-alibaba-nacos-config-2.1.0.RELEASE.jar:2.1.0.RELEASE] at com.alibaba.cloud.nacos.NacosConfigAutoConfiguration.nacosContextRefresher(NacosConfigAutoConfiguration.java:64) [spring-cloud-alibaba-nacos-config-2.1.0.RELEASE.jar:2.1.0.RELEASE] at com.alibaba.cloud.nacos.NacosConfigAutoConfiguration$$EnhancerBySpringCGLIB$$a65c2a5b.CGLIB$nacosContextRefresher$2(<generated>) [spring-cloud-alibaba-nacos-config-2.1.0.RELEASE.jar:2.1.0.RELEASE] at com.alibaba.cloud.nacos.NacosConfigAutoConfiguration$$EnhancerBySpringCGLIB$$a65c2a5b$$FastClassBySpringCGLIB$$f4bcecf5.invoke(<generated>) [spring-cloud-alibaba-nacos-config-2.1.0.RELEASE.jar:2.1.0.RELEASE] at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) [spring-core-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363) [spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE] at com.alibaba.cloud.nacos.NacosConfigAutoConfiguration$$EnhancerBySpringCGLIB$$a65c2a5b.nacosContextRefresher(<generated>) [spring-cloud-alibaba-nacos-config-2.1.0.RELEASE.jar:2.1.0.RELEASE] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_282] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_282] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_282] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_282] at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:622) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:607) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1321) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1160) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:845) ~[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877) ~[spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.1.7.RELEASE.jar:2.1.7.RELEASE] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:743) ~[spring-boot-2.1.7.RELEASE.jar:2.1.7.RELEASE] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:390) ~[spring-boot-2.1.7.RELEASE.jar:2.1.7.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:312) ~[spring-boot-2.1.7.RELEASE.jar:2.1.7.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1214) ~[spring-boot-2.1.7.RELEASE.jar:2.1.7.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1203) ~[spring-boot-2.1.7.RELEASE.jar:2.1.7.RELEASE] at com.roswu.nacos.NacosDemoApplication.main(NacosDemoApplication.java:15) ~[classes/:na]Caused by: java.lang.reflect.InvocationTargetException: null at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_282] at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_282] at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_282] at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_282] at com.alibaba.nacos.api.config.ConfigFactory.createConfigService(ConfigFactory.java:42) ~[nacos-api-1.1.1.jar:na] ... 33 common frames omittedCaused by: com.alibaba.nacos.api.exception.NacosException: endpoint is blank at com.alibaba.nacos.client.config.impl.ServerListManager.<init>(ServerListManager.java:154) ~[nacos-client-1.1.1.jar:na] at com.alibaba.nacos.client.config.http.ServerHttpAgent.<init>(ServerHttpAgent.java:244) ~[nacos-client-1.1.1.jar:na] at com.alibaba.nacos.client.config.NacosConfigService.<init>(NacosConfigService.java:83) ~[nacos-client-1.1.1.jar:na] ... 38 common frames omitted- 1
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相关的application.yml企业管理系统定制开发配置文件如下
server: port: 8088spring: application: name: nacos-roswu cloud: nacos: discovery: server-addr: nacos服务ip:8848management: endpoints: web: exposure: include: '*'- 1
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异常处理
这种写法，服务是可以正常启动的，不过，每次启动服务都会看到这堆报错，看着挺揪心。将上述配置的一部分，调整并迁移到.yml中
spring: application: name: nacos-roswu cloud: nacos: discovery: server-addr: nacos服务ip:8848 #配置Nacos地址 config: server-addr: nacos服务ip:8848 #Nacos地址 file-extension: yaml #这里我们获取的yaml格式的配置management: endpoints: web: exposure: include: '*'- 1
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重新启动服务，则不会报错了。
异常分析
上面的报错，有两个原因。一个是没有在配置文件中声明配置中心（spring.cloud.nacos.config.server-addr），一个是项目初始化时，读取不到配置(需要将部分配置放置到bootstrap配置文件中)。
bootstrap.yml vs application.yml
下面补充一下application.yml和bootstrap.yml的主要区别
bootstrap.yml 和 application.yml 都可以用来配置参数。
bootstrap.yml 用来程序引导时执行，应用于更加早期配置信息读取。可以理解成系统级别的一些参数配置，这些参数一般是不会变动的。
application.yml 可以用来定义应用级别的， 应用程序特有配置信息，可以用来配置后续各个模块中需使用的公共参数等。如果搭配 spring-cloud-config 使用， application.yml里面定义的文件可以实现动态替换。