Spring 云Eureka服务器在启动eureka客户端服务后立即重启。（升级JDK和Spring引导版本后。）

Question

我正在开发一组使用 eureka 服务器相互发现的微服务。

昨天我将我们的项目从 JDK 1.8 升级到 JDK 14，并将依赖项的所有版本号调整为最新版本。 我现在在 2.2.6.RELEASE 版本中使用 spring-boot-starter-parent 作为父 POM。

所有项目都构建良好，所有单元测试也都在运行。 但是今天我发现使用 eureka 的服务发现不再起作用了。

为了测试，我通常首先启动我的 eureka 服务器并等待它完全启动。 之后我启动客户端，以便他们可以注册。 问题是：一旦我启动第一个客户端服务，eureka 服务器就会关闭并尝试重新启动，抛出许多最初启动时不存在的异常。

最后，当它似乎已经解决时，我无法调用我的服务，可能是因为它们不可发现。

这里有一些关于我的设置的细节：

我使用了一个自定义的父 POM，它源自 spring-boot-starter-parent。

父 POM：

<project xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.6.RELEASE</version>
        <relativePath />
    </parent>

    <groupId>com.whatever</groupId>
    <artifactId>parent</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>pom</packaging>

    <properties>
        <java.version>14</java.version>
        <spring-cloud.version>Hoxton.RELEASE</spring-cloud.version>
<!-- Also tried these...
        <spring-cloud.version>Hoxton.SR1</spring-cloud.version>
        <spring-cloud.version>Hoxton.SR2</spring-cloud.version>
        <spring-cloud.version>Hoxton.SR3</spring-cloud.version>
-->
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-parent</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

 <!-- ... more stuff ... -->

</project>

我的eureka server服务的POM如下：

尤里卡服务器POM：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>com.whatever</groupId>
        <artifactId>parent</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <relativePath/>
    </parent>

    <groupId>com.whatever</groupId>
    <artifactId>service-directory</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <properties>
        <java.version>14</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.jacoco</groupId>
                <artifactId>jacoco-maven-plugin</artifactId>
                <!-- version managed in parent POM -->
            </plugin>
        </plugins>
    </build>
</project>

有一点值得注意：我的 eureka 服务器服务本身就是一个 eureka 客户端。

这是我来自 eureka 服务器服务的application.yml ：

尤里卡服务器的application.yml：

spring:
  profiles:
    active: test
  application:
    name: ServiceDirectory

server:
  port: 8099

logging.level:
    org.springframework:
      web: DEBUG
      web.servlet.view.freemarker.FreeMarkerConfigurer: INFO

eureka:
  client:
    service-url:
      defaultZone: http://localhost:${server.port}/eureka/

management:
  endpoint:
    health:
      show-details: always
  endpoints:
    web:
      exposure:
        include:
        - '*'

---

spring:
  profiles: test

spring.output.ansi.enabled: ALWAYS

作为客户端 application.yml 的示例，这是我的 API-Gateway 服务的 application.yml，它在 eureka 服务器上注册自身：

Eureka Client（API-Gateway）的application.yml：

spring:
  profiles:
    active: test
  application:
    name: gateway

server:
  port: 8088

eureka:
  client:
    service-url:
      defaultZone: http://localhost:8099/eureka/

---

spring:
  profiles: test

zuul:
  routes:
    service-a:
      path: /service-a/**
      url: http://localhost:8083
      sensitiveHeaders: 
      strip-prefix: true
    service-b:
      path: /service-b/**
      url: http://localhost:9920
      sensitiveHeaders: 
      strip-prefix: true
    service-directory:
      path: /service-directory/**
      url: http://localhost:8099
      sensitiveHeaders: 
      strip-prefix: true
    eureka-home:
      path: /eureka/**
      url: http://localhost:8099
      sensitiveHeaders: 
      strip-prefix: false

spring.output.ansi.enabled: ALWAYS

我启动哪个客户端服务似乎并不重要。

如果您需要有关设置的更多详细信息，请告诉我。

这是我的尤里卡服务器的 output：

尤里卡服务器 output 1：

 . ____ _ __ _ _
 /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/ ___)| |_)| | | | | || (_| | ) ) ) )
 ' |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot :: (v2.2.6.RELEASE)

13:22:18.244 c.w.s.ServiceDirectoryApplication : The following profiles are active: test
13:22:19.625 o.s.boot.actuate.endpoint.EndpointId : Endpoint ID 'service-registry' contains invalid characters, please migrate to a valid format.
...
13:22:20.769 c.netflix.config.DynamicPropertyFactory : DynamicPropertyFactory is initialized with configuration sources: com.netflix.config.ConcurrentCompositeConfiguration@235cb2ea
 WARNING: An illegal reflective access operation has occurred
 WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils (file:/home/xxx/.m2/repository/org/springframework/spring-core/5.2.1.RELEASE/spring-core-5.2.1.RELEASE.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
 WARNING: Please consider reporting this to the maintainers of org.springframework.cglib.core.ReflectUtils
 WARNING: Use --illegal-access= to enable ings of further illegal reflective access operations
 WARNING: All illegal access operations will be denied in a future release
13:22:21.412 c.s.j.s.i.a.WebApplicationImpl : Initiating Jersey application, version 'Jersey: 1.19.1 03/11/2016 02:08 PM'
...
13:22:23.207 ockingLoadBalancerClientRibbon Logger : You already have RibbonLoadBalancerClient on your classpath. It will be used by default. As Spring Cloud Ribbon is in maintenance mode. We recommend switching to BlockingLoadBalancerClient instead. In order to use it, set the value of `spring.cloud.loadbalancer.ribbon.enabled` to `false` or remove spring-cloud-starter-netflix-ribbon from your project.
13:22:23.237 iguration$LoadBalancerCaffeine Logger : Spring Cloud LoadBalancer is currently working with default default cache. You can switch to using Caffeine cache, by adding it to the classpath.
13:22:23.254 o.s.c.n.eureka.Instance Factory : Setting initial instance status as: STARTING
13:22:23.321 com.netflix.discovery.DiscoveryClient : Initializing Eureka in region us-east-1
...
13:22:23.601 com.netflix.discovery.DiscoveryClient : Getting all instance registry from the eureka server
13:22:23.655 ERROR c.n.d.s.t.d.RedirectingEurekaHttpClient : Request execution error. endpoint=DefaultEndpoint{ serviceUrl='http://localhost:8099/eureka/}

com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused
    at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:187) ~[jersey-apache-client4-1.19.1.jar:1.19.1]
    ...
    at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$6.execute(EurekaHttpClientDecorator.java:137) ~[eureka-client-1.9.13.jar:1.9.13]
    ...
Caused by: java.net.ConnectException: Connection refused
    at java.base/sun.nio.ch.Net.pollConnect(Native Method) ~[na:na]
    ...
    at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:180) ~[httpclient-4.5.12.jar:4.5.12]
    ...

13:22:23.656 c.n.d.s.t.d.RetryableEurekaHttpClient : Request execution failed with message: java.net.ConnectException: Connection refused
13:22:23.658 ERROR com.netflix.discovery.DiscoveryClient : DiscoveryClient_SERVICEDIRECTORY/xxxComputer.fritz.box:ServiceDirectory:8099 - was unable to refresh its cache! status = Cannot execute request on any known server

com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
    at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:112) ~[eureka-client-1.9.13.jar:1.9.13]
    ...
    at org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration.eurekaClient(EurekaClientAutoConfiguration.java:324) ~[spring-cloud-netflix-eureka-client-2.2.0.RELEASE.jar:2.2.0.RELEASE]
    ...
    at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) ~[spring-boot-devtools-2.2.6.RELEASE.jar:2.2.6.RELEASE]

13:22:23.659 com.netflix.discovery.DiscoveryClient : Using default backup registry implementation which does not do anything.
...
13:22:23.691 c.n.eureka.cluster.PeerEurekaNodes : Adding new peer nodes [http://localhost:8099/eureka/]
...
13:22:23.805 c.n.eureka.cluster.PeerEurekaNodes : Replica node URL: http://localhost:8099/eureka/
13:22:23.810 c.n.e.registry.AbstractInstanceRegistry : Finished initializing remote region registries. All known remote regions: []
13:22:23.811 c.n.eureka.DefaultEurekaServerContext : Initialized
13:22:23.854 o.s.c.n.e.s.EurekaServiceRegistry : Registering application SERVICEDIRECTORY with eureka with status UP
13:22:23.855 com.netflix.discovery.DiscoveryClient : Saw local status change event StatusChangeEvent [timestamp=1586344943855, current=UP, previous=STARTING]
13:22:23.857 com.netflix.discovery.DiscoveryClient : DiscoveryClient_SERVICEDIRECTORY/xxxComputer.fritz.box:ServiceDirectory:8099: registering service...
13:22:23.860 o.s.c.n.e.server.EurekaServerBootstrap : Setting the eureka configuration..
13:22:23.860 d.s.w.p.DocumentationPluginsBootstrapper : Context refreshed
13:22:23.860 o.s.c.n.e.server.EurekaServerBootstrap : Eureka data center value eureka.datacenter is not set, defaulting to default
13:22:23.861 o.s.c.n.e.server.EurekaServerBootstrap : Eureka environment value eureka.environment is not set, defaulting to test
13:22:23.863 c.n.d.s.t.d.RedirectingEurekaHttpClient : Request execution error. endpoint=DefaultEndpoint{ serviceUrl='http://localhost:8099/eureka/}

com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused
    ...
    at com.netflix.discovery.EurekaIdentityHeaderFilter.handle(EurekaIdentityHeaderFilter.java:27) ~[eureka-client-1.9.13.jar:1.9.13]
    at com.sun.jersey.api.client.Client.handle(Client.java:652) ~[jersey-client-1.19.1.jar:1.19.1]
    ...
    at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56) ~[eureka-client-1.9.13.jar:1.9.13]
    ...
Caused by: java.net.ConnectException: Connection refused
    ...
 ...

13:22:23.864 c.n.d.s.t.d.RetryableEurekaHttpClient : Request execution failed with message: java.net.ConnectException: Connection refused
13:22:23.869 com.netflix.discovery.DiscoveryClient : DiscoveryClient_SERVICEDIRECTORY/xxxComputer.fritz.box:ServiceDirectory:8099 - registration failed Cannot execute request on any known server

com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
    at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$1.execute(EurekaHttpClientDecorator.java:59) ~[eureka-client-1.9.13.jar:1.9.13]
    ...

13:22:23.870 c.n.discovery.Instance Replicator : There was a problem with the instance replicator

com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
    at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:112) ~[eureka-client-1.9.13.jar:1.9.13]
    ...

...
13:22:24.193 o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8099 (http) with context path ''
13:22:24.194 .s.c.n.e.s.EurekaAutoServiceRegistration : Updating port to 8099
13:22:24.197 c.w.s.ServiceDirectoryApplication : Started ServiceDirectoryApplication in 6.846 seconds (JVM running for 7.369)

这是它自己生产的output，没有启动任何其他服务。

让它运行一段时间后，它会添加更多 output ，如下所示：

尤里卡服务器 output 2：

13:22:53.662 com.netflix.discovery.DiscoveryClient : Disable delta property : false
...
13:22:53.783 c.n.e.registry.AbstractInstanceRegistry : DS: Registry: lease doesn't exist, registering resource: SERVICEDIRECTORY - xxxComputer.fritz.box:ServiceDirectory:8099
13:22:53.783 c.n.eureka.resources.InstanceResource : Not Found (Renew): SERVICEDIRECTORY - xxxComputer.fritz.box:ServiceDirectory:8099
13:22:53.803 com.netflix.discovery.DiscoveryClient : DiscoveryClient_SERVICEDIRECTORY/xxxComputer.fritz.box:ServiceDirectory:8099 - Re-registering apps/SERVICEDIRECTORY
13:22:53.804 com.netflix.discovery.DiscoveryClient : DiscoveryClient_SERVICEDIRECTORY/xxxComputer.fritz.box:ServiceDirectory:8099: registering service...
13:22:53.815 com.netflix.discovery.DiscoveryClient : The response status is 200
...
13:22:53.856 c.n.e.registry.AbstractInstanceRegistry : Registered instance SERVICEDIRECTORY/xxxComputer.fritz.box:ServiceDirectory:8099 with status UP (replication=false)
13:22:53.859 com.netflix.discovery.DiscoveryClient : DiscoveryClient_SERVICEDIRECTORY/xxxComputer.fritz.box:ServiceDirectory:8099 - registration status: 204
...
13:22:54.398 c.n.e.registry.AbstractInstanceRegistry : Registered instance SERVICEDIRECTORY/xxxComputer.fritz.box:ServiceDirectory:8099 with status UP (replication=true)
13:23:23.817 com.netflix.discovery.DiscoveryClient : Disable delta property : false
...
13:23:23.824 o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped to ResourceHttpRequestHandler ["classpath:/META-INF/resources/", "classpath:/resources/", "classpath:/static/", "classpath:/public/", "/"]
13:23:23.829 com.netflix.discovery.DiscoveryClient : The response status is 200
13:23:23.867 o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped to ResourceHttpRequestHandler ["classpath:/META-INF/resources/", "classpath:/resources/", "classpath:/static/", "classpath:/public/", "/"]
13:23:23.881 c.n.e.registry.AbstractInstanceRegistry : Registered instance SERVICEDIRECTORY/xxxComputer.fritz.box:ServiceDirectory:8099 with status UP (replication=true)
13:23:23.881 c.n.e.r.PeerAwareInstanceRegistryImpl : Got 1 instances from neighboring DS node
13:23:23.881 c.n.e.r.PeerAwareInstanceRegistryImpl : Renew threshold is: 1
13:23:23.881 c.n.e.r.PeerAwareInstanceRegistryImpl : Changing status to UP
13:23:23.893 e.s.EurekaServerInitializerConfiguration : Started Eureka Server
13:23:24.385 o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped to ResourceHttpRequestHandler ["classpath:/META-INF/resources/", "classpath:/resources/", "classpath:/static/", "classpath:/public/", "/"]

我可以让它运行只要我愿意。 我一启动另一个服务，在eureka服务器output中打印出以下内容：

尤里卡服务器错误output：

13:24:25.899 o.s.c.n.e.s.EurekaServiceRegistry : Unregistering application SERVICEDIRECTORY with eureka with status DOWN
13:24:25.899 com.netflix.discovery.DiscoveryClient : Saw local status change event StatusChangeEvent [timestamp=1586345065899, current=DOWN, previous=UP]
13:24:25.900 com.netflix.discovery.DiscoveryClient : DiscoveryClient_SERVICEDIRECTORY/xxxComputer.fritz.box:ServiceDirectory:8099: registering service...
13:24:25.903 c.n.eureka.DefaultEurekaServerContext : Shutting down ...
13:24:25.907 o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped to ResourceHttpRequestHandler ["classpath:/META-INF/resources/", "classpath:/resources/", "classpath:/static/", "classpath:/public/", "/"]
13:24:25.908 c.n.eureka.DefaultEurekaServerContext : Shut down
13:24:25.910 c.n.e.registry.AbstractInstanceRegistry : Registered instance SERVICEDIRECTORY/xxxComputer.fritz.box:ServiceDirectory:8099 with status DOWN (replication=false)
13:24:25.911 o.s.b.f.support.DisposableBeanAdapter : Invocation of destroy method failed on bean with name 'tomcatMetricsBinder': java.lang.NoSuchMethodError: 'void io.micrometer.core.instrument.binder.tomcat.TomcatMetrics.close()'
13:24:25.912 com.netflix.discovery.DiscoveryClient : DiscoveryClient_SERVICEDIRECTORY/xxxComputer.fritz.box:ServiceDirectory:8099 - registration status: 204
13:24:25.913 o.s.s.concurrent.ThreadPoolTaskExecutor : Shutting down ExecutorService 'applicationTaskExecutor'
13:24:25.923 com.netflix.discovery.DiscoveryClient : Shutting down DiscoveryClient ...
13:24:28.924 com.netflix.discovery.DiscoveryClient : Unregistering ...
13:24:28.930 o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped to ResourceHttpRequestHandler ["classpath:/META-INF/resources/", "classpath:/resources/", "classpath:/static/", "classpath:/public/", "/"]
13:24:28.933 c.n.e.registry.AbstractInstanceRegistry : Cancelled instance SERVICEDIRECTORY/xxxComputer.fritz.box:ServiceDirectory:8099 (replication=false)
13:24:28.935 com.netflix.discovery.DiscoveryClient : DiscoveryClient_SERVICEDIRECTORY/xxxComputer.fritz.box:ServiceDirectory:8099 - deregister status: 200
13:24:28.953 com.netflix.discovery.DiscoveryClient : Completed shut down of DiscoveryClient
13:24:29.111 trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

 . ____ _ __ _ _
 /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/ ___)| |_)| | | | | || (_| | ) ) ) )
 ' |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot :: (v2.2.6.RELEASE)

13:24:29.170 c.w.s.ServiceDirectoryApplication : The following profiles are active: test
...
13:24:31.186 com.netflix.discovery.DiscoveryClient : Getting all instance registry from the eureka server
13:24:31.190 ERROR c.n.d.s.t.d.RedirectingEurekaHttpClient : Request execution error. endpoint=DefaultEndpoint{ serviceUrl='http://localhost:8099/eureka/}

com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused
    at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:187) ~[jersey-apache-client4-1.19.1.jar:1.19.1]
    ...
    at com.netflix.discovery.EurekaIdentityHeaderFilter.handle(EurekaIdentityHeaderFilter.java:27) ~[eureka-client-1.9.13.jar:1.9.13]
    ...
    at com.netflix.discovery.shared.transport.jersey.AbstractJerseyEurekaHttpClient.getApplications(AbstractJerseyEurekaHttpClient.java:165) ~[eureka-client-1.9.13.jar:1.9.13]
    ...
Caused by: java.net.ConnectException: Connection refused
    at java.base/sun.nio.ch.Net.pollConnect(Native Method) ~[na:na]
    ..
    at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:333) ~[na:na]
    at java.base/java.net.Socket.connect(Socket.java:648) ~[na:na]
    ...

13:24:31.191 c.n.d.s.t.d.RetryableEurekaHttpClient : Request execution failed with message: java.net.ConnectException: Connection refused
13:24:31.193 ERROR com.netflix.discovery.DiscoveryClient : DiscoveryClient_SERVICEDIRECTORY/xxxComputer.fritz.box:ServiceDirectory:8099 - was unable to refresh its cache! status = Cannot execute request on any known server

com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
    at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77) ~[eureka-client-1.9.13.jar:1.9.13]
    ...

13:24:31.193 com.netflix.discovery.DiscoveryClient : Using default backup registry implementation which does not do anything.
13:24:31.194 com.netflix.discovery.DiscoveryClient : Starting heartbeat executor: renew interval is: 30
13:24:31.195 c.n.discovery.Instance Replicator : Instance Replicator onDemand update allowed rate per min is 4
13:24:31.197 com.netflix.discovery.DiscoveryClient : Discovery Client initialized at timestamp 1586345071197 with initial instances count: 0
13:24:31.210 c.n.eureka.DefaultEurekaServerContext : Initializing ...
13:24:31.210 c.n.eureka.cluster.PeerEurekaNodes : Adding new peer nodes [http://localhost:8099/eureka/]
...
13:24:31.304 c.n.eureka.cluster.PeerEurekaNodes : Replica node URL: http://localhost:8099/eureka/
13:24:31.308 c.n.e.registry.AbstractInstanceRegistry : Finished initializing remote region registries. All known remote regions: []
13:24:31.310 c.n.eureka.DefaultEurekaServerContext : Initialized
13:24:31.346 o.s.c.n.e.s.EurekaServiceRegistry : Registering application SERVICEDIRECTORY with eureka with status UP
13:24:31.347 com.netflix.discovery.DiscoveryClient : Saw local status change event StatusChangeEvent [timestamp=1586345071347, current=UP, previous=STARTING]
13:24:31.347 com.netflix.discovery.DiscoveryClient : DiscoveryClient_SERVICEDIRECTORY/xxxComputer.fritz.box:ServiceDirectory:8099: registering service...
13:24:31.349 o.s.c.n.e.server.EurekaServerBootstrap : Setting the eureka configuration..
13:24:31.350 d.s.w.p.DocumentationPluginsBootstrapper : Context refreshed
13:24:31.350 o.s.c.n.e.server.EurekaServerBootstrap : Eureka data center value eureka.datacenter is not set, defaulting to default
13:24:31.350 o.s.c.n.e.server.EurekaServerBootstrap : Eureka environment value eureka.environment is not set, defaulting to test
...
13:24:31.351 c.n.d.s.t.d.RedirectingEurekaHttpClient : Request execution error. endpoint=DefaultEndpoint{ serviceUrl='http://localhost:8099/eureka/}

com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused
    at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:187) ~[jersey-apache-client4-1.19.1.jar:1.19.1]
    ...
    at com.netflix.discovery.EurekaIdentityHeaderFilter.handle(EurekaIdentityHeaderFilter.java:27) ~[eureka-client-1.9.13.jar:1.9.13]
    at com.sun.jersey.api.client.Client.handle(Client.java:652) ~[jersey-client-1.19.1.jar:1.19.1]
    ...
    at com.netflix.discovery.shared.transport.jersey.AbstractJerseyEurekaHttpClient.register(AbstractJerseyEurekaHttpClient.java:56) ~[eureka-client-1.9.13.jar:1.9.13]
    ...
Caused by: java.net.ConnectException: Connection refused
    at java.base/sun.nio.ch.Net.pollConnect(Native Method) ~[na:na]
    ...
    at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:121) ~[httpclient-4.5.12.jar:4.5.12]
    ...

13:24:31.352 c.n.d.s.t.d.RetryableEurekaHttpClient : Request execution failed with message: java.net.ConnectException: Connection refused
13:24:31.353 com.netflix.discovery.DiscoveryClient : DiscoveryClient_SERVICEDIRECTORY/xxxComputer.fritz.box:ServiceDirectory:8099 - registration failed Cannot execute request on any known server

com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
    at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:112) ~[eureka-client-1.9.13.jar:1.9.13]
    ...

13:24:31.354 c.n.discovery.Instance Replicator : There was a problem with the instance replicator

com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
    at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:112) ~[eureka-client-1.9.13.jar:1.9.13]
    ...

13:24:31.371 s.d.s.w.s.ApiListingReferenceScanner : Scanning for api listing references
13:24:31.457 o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8099 (http) with context path ''
13:24:31.458 .s.c.n.e.s.EurekaAutoServiceRegistration : Updating port to 8099
...
13:24:34.203 c.n.e.registry.AbstractInstanceRegistry : Registered instance GATEWAY/xxxComputer.fritz.box:gateway:8088 with status UP (replication=false)
...
13:24:34.722 c.n.e.registry.AbstractInstanceRegistry : Registered instance GATEWAY/xxxComputer.fritz.box:gateway:8088 with status UP (replication=true)

然后它继续运行。

在此 output 中多次出现的部分是以下警告：

13:22:23.658 ERROR com.netflix.discovery.DiscoveryClient : DiscoveryClient_SERVICEDIRECTORY/xxxComputer.fritz.box:ServiceDirectory:8099 - ...(more stuff)

从主机名中的 fritz.box（我的路由器）可以看出，我在家工作。 我把它留在了日志中，因为我想知道它为什么要尝试使用我的路由器在整个 LAN 中注册自己。 不应该简单地使用“localhost”吗？

在客户端，打印以下内容：

尤里卡客户端output：


 . ____ _ __ _ _
 /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/ ___)| |_)| | | | | || (_| | ) ) ) )
 ' |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot :: (v2.2.6.RELEASE)

13:24:29.584 com.whatever.ApiGatewayApplication : The following profiles are active: test
...
13:24:32.004 o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8088 (http)
...
13:24:34.122 com.netflix.discovery.DiscoveryClient : Starting heartbeat executor: renew interval is: 30
13:24:34.126 c.n.discovery.Instance Replicator : Instance Replicator onDemand update allowed rate per min is 4
13:24:34.132 com.netflix.discovery.DiscoveryClient : Discovery Client initialized at timestamp 1586345074130 with initial instances count: 0
13:24:34.137 o.s.c.n.e.s.EurekaServiceRegistry : Registering application GATEWAY with eureka with status UP
13:24:34.137 com.netflix.discovery.DiscoveryClient : Saw local status change event StatusChangeEvent [timestamp=1586345074137, current=UP, previous=STARTING]
13:24:34.139 com.netflix.discovery.DiscoveryClient : DiscoveryClient_GATEWAY/xxxComputer.fritz.box:gateway:8088: registering service...
13:24:34.181 o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8088 (http) with context path ''
13:24:34.182 .s.c.n.e.s.EurekaAutoServiceRegistration : Updating port to 8088
13:24:34.186 com.whatever.ApiGatewayApplication : Started ApiGatewayApplication in 5.556 seconds (JVM running for 6.113)
13:24:34.206 com.netflix.discovery.DiscoveryClient : DiscoveryClient_GATEWAY/xxxComputer.fritz.box:gateway:8088 - registration status: 204
...
13:25:04.125 com.netflix.discovery.DiscoveryClient : Getting all instance registry from the eureka server
13:25:04.168 com.netflix.discovery.DiscoveryClient : The response status is 200

乍一看，这在我看来还不错。

到目前为止，我尝试的是测试不同版本的 spring 云是否会出现问题。 由于我使用的是 spring 引导的 2.2.x 版本，因此仅考虑了 spring 云的 Hoxton 版本。 但也许我应该扩大这个假设。

我重新启动了我的电脑。

我测试了在启动不同的客户端时问题是否仍然存在。

一件有趣的事情是：我启动客户端后，eureka 服务器就会重新启动。 它甚至似乎都没有等待收到请求。

谁能帮我找到解决这个问题的方法？

Answer 1

我为我找到了解决方法。 这个问题似乎与我在 11.3 版（当前最新）中使用的 Netbeans 相关。

当我从命令行使用mvn并在单独的终端中使用java启动服务时，问题就消失了。

我不知道为什么 Netbeans 会产生这个问题。

现在这个解决方法对我来说没问题，所以我将关闭这个问题。

Spring 云Eureka服务器在启动eureka客户端服务后立即重启。（升级JDK和Spring引导版本后。）

问题描述

父 POM：

尤里卡服务器POM：

尤里卡服务器的application.yml：

Eureka Client（API-Gateway）的application.yml：

尤里卡服务器 output 1：

尤里卡服务器 output 2：

尤里卡服务器错误output：

尤里卡客户端output：

1 个解决方案

解决方案1
0 已采纳 2020-04-20 10:59:55

Spring 云Eureka服务器在启动eureka客户端服务后立即重启。 （升级JDK和Spring引导版本后。）

问题描述

父 POM：

尤里卡服务器POM：

尤里卡服务器的application.yml：

Eureka Client（API-Gateway）的application.yml：

尤里卡服务器 output 1：

尤里卡服务器 output 2：

尤里卡服务器错误output：

尤里卡客户端output：

1 个解决方案

解决方案1 0 已采纳 2020-04-20 10:59:55

Spring 云Eureka服务器在启动eureka客户端服务后立即重启。（升级JDK和Spring引导版本后。）

解决方案1
0 已采纳 2020-04-20 10:59:55