报错1：

2022-06-09 22:07:27.934 ERROR 15656 --- [           main] c.a.cloud.nacos.NacosConfigProperties    : create config service error!properties=NacosConfigProperties{serverAddr='null', encode='null', group='DEFAULT_GROUP', prefix='null', fileExtension='properties', timeout=3000, endpoint='null', namespace='null', accessKey='null', secretKey='null', contextPath='null', clusterName='null', name='null', sharedDataids='null', refreshableDataids='null', extConfig=null},e=,

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.client.NacosPropertySourceLocator.locate(NacosPropertySourceLocator.java:63) [spring-cloud-alibaba-nacos-config-2.1.0.RELEASE.jar:2.1.0.RELEASE]
	at org.springframework.cloud.bootstrap.config.PropertySourceLocator.locateCollection(PropertySourceLocator.java:51) [spring-cloud-context-3.1.3-20220527.135538-64.jar:3.1.3-SNAPSHOT]
	at org.springframework.cloud.bootstrap.config.PropertySourceLocator.locateCollection(PropertySourceLocator.java:47) [spring-cloud-context-3.1.3-20220527.135538-64.jar:3.1.3-SNAPSHOT]
	at org.springframework.cloud.bootstrap.config.PropertySourceBootstrapConfiguration.initialize(PropertySourceBootstrapConfiguration.java:95) [spring-cloud-context-3.1.3-20220527.135538-64.jar:3.1.3-SNAPSHOT]
	at org.springframework.boot.SpringApplication.applyInitializers(SpringApplication.java:607) [spring-boot-2.7.0.jar:2.7.0]
	at org.springframework.boot.SpringApplication.prepareContext(SpringApplication.java:373) [spring-boot-2.7.0.jar:2.7.0]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) [spring-boot-2.7.0.jar:2.7.0]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1306) [spring-boot-2.7.0.jar:2.7.0]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1295) [spring-boot-2.7.0.jar:2.7.0]
	at com.aimer.aimermall.member.AimermallMemberApplication.main(AimermallMemberApplication.java:11) [classes/:na]
Caused by: java.lang.reflect.InvocationTargetException: null
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_202]
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_202]
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_202]
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_202]
	at com.alibaba.nacos.api.config.ConfigFactory.createConfigService(ConfigFactory.java:42) ~[nacos-api-1.1.1.jar:na]
	... 12 common frames omitted
Caused 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]
	... 17 common frames omitted

本质是报错2022-06-09 22:07:27.934 ERROR 15656c.a.cloud.nacos.NacosConfigProperties : create config service error!properties=NacosConfigProperties{serverAddr=‘null’, encode=‘null’, group=‘DEFAULT_GROUP’, prefix=‘null’, fileExtension=‘properties’, timeout=3000, endpoint=‘null’, namespace=‘null’, accessKey=‘null’, secretKey=‘null’, contextPath=‘null’, clusterName=‘null’, name=‘null’, sharedDataids=‘null’, refreshableDataids=‘null’, extConfig=null},e=,
即无法从配置文件中获取参数，或者说没有配置文件

原因

这是因为开启了nacos的配置中心依赖，此时nacos会从bootstrap中获取配置服务的信息，所以此时的报错并不是针对服务发现的配置错误，而是配置中心没有配置信息的错误

错误2

此时配置了bootstrap配置文件和依赖，但是不知道为什么已经报错，无法正常识别配置，只能配合ymal来使用

2022-06-09 22:12:18.385 ERROR 7264 --- [ing.beat.sender] com.alibaba.nacos.client.naming          : [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"172.17.120.213","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8005,"scheduled":false,"serviceName":"DEFAULT_GROUP@@aimermall-member","stopped":false,"weight":1.0}

java.lang.IllegalArgumentException: no server available
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:438) ~[nacos-client-1.1.1.jar:na]
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386) ~[nacos-client-1.1.1.jar:na]
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309) ~[nacos-client-1.1.1.jar:na]
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92) [nacos-client-1.1.1.jar:na]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_202]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_202]
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_202]
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [na:1.8.0_202]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_202]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_202]
	at java.lang.Thread.run(Thread.java:748) [na:1.8.0_202]

2022-06-09 22:12:18.385 ERROR 7264 --- [           main] c.a.c.n.registry.NacosServiceRegistry    : nacos registry, aimermall-member register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='', endpoint='', namespace='', watchDelay=30000, logName='', service='aimermall-member', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='172.17.120.213', networkInterface='', port=8005, secure=false, accessKey='', secretKey=''}},

java.lang.IllegalArgumentException: no server available
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:438) ~[nacos-client-1.1.1.jar:na]
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386) ~[nacos-client-1.1.1.jar:na]
	at com.alibaba.nacos.client.naming.net.NamingProxy.registerService(NamingProxy.java:188) ~[nacos-client-1.1.1.jar:na]
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:205) ~[nacos-client-1.1.1.jar:na]
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:184) ~[nacos-client-1.1.1.jar:na]
	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]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:232) [spring-cloud-commons-3.1.3-20220527.135707-64.jar:3.1.3-SNAPSHOT]
	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]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:133) [spring-cloud-commons-3.1.3-20220527.135707-64.jar:3.1.3-SNAPSHOT]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:98) [spring-cloud-commons-3.1.3-20220527.135707-64.jar:3.1.3-SNAPSHOT]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:86) [spring-cloud-commons-3.1.3-20220527.135707-64.jar:3.1.3-SNAPSHOT]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47) [spring-cloud-commons-3.1.3-20220527.135707-64.jar:3.1.3-SNAPSHOT]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176) [spring-context-5.3.20.jar:5.3.20]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169) [spring-context-5.3.20.jar:5.3.20]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143) [spring-context-5.3.20.jar:5.3.20]
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:421) [spring-context-5.3.20.jar:5.3.20]
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:378) [spring-context-5.3.20.jar:5.3.20]
	at org.springframework.boot.web.servlet.context.WebServerStartStopLifecycle.start(WebServerStartStopLifecycle.java:46) [spring-boot-2.7.0.jar:2.7.0]
	at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:178) [spring-context-5.3.20.jar:5.3.20]
	at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:54) [spring-context-5.3.20.jar:5.3.20]
	at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356) [spring-context-5.3.20.jar:5.3.20]
	at java.lang.Iterable.forEach(Iterable.java:75) ~[na:1.8.0_202]
	at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:155) [spring-context-5.3.20.jar:5.3.20]
	at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:123) [spring-context-5.3.20.jar:5.3.20]
	at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:935) [spring-context-5.3.20.jar:5.3.20]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:586) [spring-context-5.3.20.jar:5.3.20]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147) ~[spring-boot-2.7.0.jar:2.7.0]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:734) ~[spring-boot-2.7.0.jar:2.7.0]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) ~[spring-boot-2.7.0.jar:2.7.0]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:308) ~[spring-boot-2.7.0.jar:2.7.0]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1306) ~[spring-boot-2.7.0.jar:2.7.0]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1295) ~[spring-boot-2.7.0.jar:2.7.0]
	at com.aimer.aimermall.member.AimermallMemberApplication.main(AimermallMemberApplication.java:11) ~[classes/:na]

本质错误：c.a.c.n.registry.NacosServiceRegistry : nacos registry, aimermall-member register failed…NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties
{serverAddr=‘’, endpoint=‘’, namespace=‘’, watchDelay=30000, logName=‘’, service=‘aimermall-member’, weight=1.0, clusterName=‘DEFAULT’, namingLoadCacheAtStart=‘false’, metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip=‘172.17.120.213’, networkInterface=‘’, port=8005, secure=false, accessKey=‘’, secretKey=‘’}},

只从配置文件中获取到了服务节点名字，但是nacos服务地址不知道，所以找不到服务，导致[CLIENT-BEAT] failed to send beat: {“cluster”:“DEFAULT”,“ip”:“172.17.120.213”,“metadata”:{“preserved.register.source”:“SPRING_CLOUD”},“period”:5000,“port”:8005,“scheduled”:false,“serviceName”:“DEFAULT_GROUP@@aimermall-member”,“stopped”:false,“weight”:1.0}心跳验证失败

此时的错误是由于服务发现的配置出错，没有找到服务发现的配置中心，需要在application.yml配置服务发现的信息

总结

nacos的配置文件分为配置中心和服务发现两种配置信息，bootstrap.properties
application.yml分别是配置中心和服务发现的配置信息，标准填写为：

服务发现配置

在 application.properties’中配置 Nacos server 的地址：

server.port=8070
spring.application.name=service-provider

spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848

配置中心配置

在 bootstrap.properties 中配置 Nacos server 的地址和应用名
spring.cloud.nacos.config.server-addr=127.0.0.1:8848

spring.application.name=example