NACOS学习：02问题集锦
NACOS启动报错
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'distroMapper' defined in URL [jar:file:/D:/_Technology/aliyun/nacos/nacos/target/nacos-server.jar!/BOOT-INF/lib/nacos-naming-2.1.1.jar!/com/alibaba/nacos/naming/core/DistroMapper.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'serverMemberManager' defined in URL [jar:file:/D:/_Technology/aliyun/nacos/nacos/target/nacos-server.jar!/BOOT-INF/lib/nacos-core-2.1.1.jar!/com/alibaba/nacos/core/cluster/ServerMemberManager.class]: Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.alibaba.nacos.core.cluster.ServerMemberManager]: Constructor threw exception; nested exception is ErrCode:500, ErrMsg:jmenv.tbsite.net at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800) at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:229) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1372) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1222) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) at org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$203/1262822392.getObject(Unknown Source) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1389) at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1309) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:656) ... 89 common frames omitted Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'serverMemberManager' defined in URL [jar:file:/D:/_Technology/aliyun/nacos/nacos/target/nacos-server.jar!/BOOT-INF/lib/nacos-core-2.1.1.jar!/com/alibaba/nacos/core/cluster/ServerMemberManager.class]: Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.alibaba.nacos.core.cluster.ServerMemberManager]: Constructor threw exception; nested exception is ErrCode:500, ErrMsg:jmenv.tbsite.net at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:315) at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:296) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1372) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1222) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) at org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$203/1262822392.getObject(Unknown Source) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1389) at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1309) at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887) at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791) ... 103 common frames omitted Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.alibaba.nacos.core.cluster.ServerMemberManager]: Constructor threw exception; nested exception is ErrCode:500, ErrMsg:jmenv.tbsite.net at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:224) at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:117) at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:311) ... 118 common frames omitted Caused by: com.alibaba.nacos.api.exception.NacosException: java.net.UnknownHostException: jmenv.tbsite.net at com.alibaba.nacos.core.cluster.lookup.AddressServerMemberLookup.run(AddressServerMemberLookup.java:152) at com.alibaba.nacos.core.cluster.lookup.AddressServerMemberLookup.doStart(AddressServerMemberLookup.java:100) at com.alibaba.nacos.core.cluster.AbstractMemberLookup.start(AbstractMemberLookup.java:55) at com.alibaba.nacos.core.cluster.ServerMemberManager.initAndStartLookup(ServerMemberManager.java:185) at com.alibaba.nacos.core.cluster.ServerMemberManager.init(ServerMemberManager.java:165) at com.alibaba.nacos.core.cluster.ServerMemberManager.<init>(ServerMemberManager.java:146) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:408) at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:211) ... 120 common frames omitted Caused by: java.net.UnknownHostException: jmenv.tbsite.net at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:589) at sun.net.NetworkClient.doConnect(NetworkClient.java:175) at sun.net.www.http.HttpClient.openServer(HttpClient.java:432) at sun.net.www.http.HttpClient.openServer(HttpClient.java:527) at sun.net.www.http.HttpClient.<init>(HttpClient.java:211) at sun.net.www.http.HttpClient.New(HttpClient.java:308) at sun.net.www.http.HttpClient.New(HttpClient.java:326) at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1167) at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1103) at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:997) at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:931) at com.alibaba.nacos.common.http.client.request.JdkHttpClientRequest.execute(JdkHttpClientRequest.java:114) at com.alibaba.nacos.common.http.client.NacosRestTemplate.execute(NacosRestTemplate.java:482) at com.alibaba.nacos.common.http.client.NacosRestTemplate.get(NacosRestTemplate.java:72) at com.alibaba.nacos.core.cluster.lookup.AddressServerMemberLookup.syncFromAddressUrl(AddressServerMemberLookup.java:175) at com.alibaba.nacos.core.cluster.lookup.AddressServerMemberLookup.run(AddressServerMemberLookup.java:143) ... 130 common frames omitted 2022-09-22 15:59:57,697 WARN [WatchFileCenter] start close 2022-09-22 15:59:57,701 WARN [WatchFileCenter] start to shutdown this watcher which is watch : D:\_Technology\aliyun\nacos\nacos\conf
原因是本地单机启动，没有集群，需要加参数
rem Caused by: java.net.UnknownHostException: jmenv.tbsite.net rem Nacos默认是集群（cluster）启动，将其设置为单机（standalone）启动则不会报这个错。若需要集群启动则需要进行相关的集群配置。 rem set MODE="standalone" startup.cmd -m standalone startup.sh -m standalone
可以使用set MODE="standalone"或启动带参数startup.sh -m standalone
启动微服务后，读取不到NACOS的配置文件
Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'mengshen.fun.name' in value "${mengshen.fun.name}"
at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:180) ~[spring-core-5.3.20.jar:5.3.20]
at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:126) ~[spring-core-5.3.20.jar:5.3.20]
at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders(AbstractPropertyResolver.java:239) ~[spring-core-5.3.20.jar:5.3.20]
at org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders(AbstractPropertyResolver.java:210) ~[spring-core-5.3.20.jar:5.3.20]
at org.springframework.context.support.PropertySourcesPlaceholderConfigurer.lambda$processProperties$0(PropertySourcesPlaceholderConfigurer.java:191) ~[spring-context-5.3.20.jar:5.3.20]
at org.springframework.context.support.PropertySourcesPlaceholderConfigurer$$Lambda$254/1842161553.resolveStringValue(Unknown Source) ~[na:na]
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveEmbeddedValue(AbstractBeanFactory.java:936) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1330) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1309) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:656) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:639) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:119) ~[spring-beans-5.3.20.jar:5.3.20]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399) ~[spring-beans-5.3.20.jar:5.3.20]
... 33 common frames omitted
Error creating bean with name 'scopedTarget.helloController': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'mengshen.fun.name' in value "${mengshen.fun.name}"
null解决方案
config只能读取到botstrap.yml的内容，需要application.yml改名为bootstrap.yml，增加bootstrap的依赖，否则读取不到bootstrap.yml的信息
<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-bootstrap</artifactId> </dependency>
微服务间feign请求失败
There was an unexpected error (type=Internal Server Error, status=500). org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient.choose(Ljava/lang/String;Lorg/springframework/cloud/client/loadbalancer/Request;)Lorg/springframework/cloud/client/ServiceInstance; java.lang.AbstractMethodError: org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient.choose(Ljava/lang/String;Lorg/springframework/cloud/client/loadbalancer/Request;)Lorg/springframework/cloud/client/ServiceInstance; at org.springframework.cloud.openfeign.loadbalancer.FeignBlockingLoadBalancerClient.execute(FeignBlockingLoadBalancerClient.java:88) at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:119) at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:89) at feign.ReflectiveFeign$FeignInvocationHandler.invoke(ReflectiveFeign.java:100) at com.sun.proxy.$Proxy98.hello(Unknown Source) at com.sephy.consumer.hello.action.HelloController.index(HelloController.java:36) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:483) at org.springframework.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:282) at org.springframework.cloud.context.scope.GenericScope$LockedScopedProxyFactoryBean.invoke(GenericScope.java:485)
因为loadbalance与spring-cloud-starter-netflix-ribbon冲突，pom里面过滤掉
<dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId> <exclusions> <!--跟loadbalancer冲突--> <exclusion> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-ribbon</artifactId> </exclusion> </exclusions> </dependency>
geteway404
通过gateway访问http://localhost:8888/spring-cloud-consumer/hello/name，希望跳转到consumer，但确报404
Whitelabel Error Page This application has no explicit mapping for /error, so you are seeing this as a fallback. Thu Sep 22 16:15:03 GMT+08:00 2022 There was an unexpected error (type=Not Found, status=404). No message available
去掉gateway转发时的第一个路径，去掉第一个路径filters:- StripPrefix=1，或者增加替换正则- RewritePath=/spring-cloud-producer/(?<segment>.*),/$\{segment}
spring:
application:
name: spring-cloud-gateway
cloud:
gateway:
routes:
- id: NACOS-CONSUMER #微服务路由规则
uri: lb://spring-cloud-producer # 负载均衡，将请求转发到注册中心注册的XXXXX服务
predicates: # 断言
- Path=/spring-cloud-producer/** # 如果前端请求路径包含 api/XXX，则应用这条路由规则
filters: #过滤器
# - RewritePath=/spring-cloud-producer/(?<segment>.*),/$\{segment} # 将跳转路径中包含的 XX替换成空，否则gateway跳转会带上/spring-cloud-producer，就会404
- StripPrefix=1 #转发之前去掉第一层的路径,过滤调用附加路径gateway404，Error has been observed at the following site
Whitelabel Error Page This application has no configured error view, so you are seeing this as a fallback. Thu Sep 22 16:18:24 GMT+08:00 2022 [3bafcaac-2] There was an unexpected error (type=Not Found, status=404). org.springframework.web.server.ResponseStatusException: 404 NOT_FOUND at org.springframework.web.reactive.resource.ResourceWebHandler.lambda$handle$1(ResourceWebHandler.java:408) Suppressed: The stacktrace has been enhanced by Reactor, refer to additional information below: Error has been observed at the following site(s): *__checkpoint ⇢ org.springframework.cloud.gateway.filter.WeightCalculatorWebFilter [DefaultWebFilterChain] *__checkpoint ⇢ HTTP GET "/spring-cloud-consumer/hello/name" [ExceptionHandlingWebHandler] Original Stack Trace: at org.springframework.web.reactive.resource.ResourceWebHandler.lambda$handle$1(ResourceWebHandler.java:408) at org.springframework.web.reactive.resource.ResourceWebHandler$$Lambda$751/825778770.get(Unknown Source) at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:44) at reactor.core.publisher.Mono.subscribe(Mono.java:4400) at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onComplete(FluxSwitchIfEmpty.java:82) at reactor.core.publisher.MonoFlatMap$FlatMapMain.onComplete(MonoFlatMap.java:181) at reactor.core.publisher.MonoNext$NextSubscriber.onComplete(MonoNext.java:102) at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:368)
这是predicates没有配置通配，由原来的
predicates: - Path=/spring-cloud-consumer
改为
predicates: - Path=/spring-cloud-consumer/**
即可
熔断失败
spring-cloud-starter-hystrix好像需要依赖zuul组件
feign.FeignException$ServiceUnavailable: [503] during [GET] to [http://spring-cloud-producer/hello?name=name] [HelloRemote#hello(String)]: [Load balancer does not contain an instance for the service spring-cloud-producer] at feign.FeignException.serverErrorStatus(FeignException.java:237) ~[feign-core-10.12.jar:na] at feign.FeignException.errorStatus(FeignException.java:180) ~[feign-core-10.12.jar:na] at feign.FeignException.errorStatus(FeignException.java:169) ~[feign-core-10.12.jar:na] at feign.codec.ErrorDecoder$Default.decode(ErrorDecoder.java:92) ~[feign-core-10.12.jar:na] at feign.AsyncResponseHandler.handleResponse(AsyncResponseHandler.java:96) ~[feign-core-10.12.jar:na] at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:138) ~[feign-core-10.12.jar:na] at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:89) ~[feign-core-10.12.jar:na] at feign.ReflectiveFeign$FeignInvocationHandler.invoke(ReflectiveFeign.java:100) ~[feign-core-10.12.jar:na] at com.sun.proxy.$Proxy95.hello(Unknown Source) ~[na:na] at com.sephy.consumer.hello.action.HelloController.index(HelloController.java:36) ~[classes/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_25] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_25] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_25] at java.lang.reflect.Method.invoke(Method.java:483) ~[na:1.8.0_25] at org.springframework.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:282) ~[spring-core-5.3.20.jar:5.3.20] at org.springframework.cloud.context.scope.GenericScope$LockedScopedProxyFactoryBean.invoke(GenericScope.java:485) ~[spring-cloud-context-3.0.3.jar:3.0.3] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spr
改正方案，原来的依赖
<dependency> <groupId>org.springframework.cloud</groupId> <artifactId></artifactId> <version>1.4.7.RELEASE</version> </dependency>
改成
<dependency> <groupId>org.springframework.cloud</groupId> <artifactId></artifactId> <version>2.2.10.RELEASE</version> </dependency>
配置文件修改
#feign: # hystrix: # enabled: true feign: # 开启熔断机制 circuitbreaker: enabled: true # 设置超时时间 httpclient: connection-timeout: 2000