私は、eurekaサーバーを使用してお互いを検出する一連のマイクロサービスを開発しています。
昨日、プロジェクトをJDK 1.8からJDK 14にアップグレードし、依存関係のすべてのバージョン番号を最新のものに適合させました。バージョン2.2.6.RELEASEで親POMとしてspring-boot-starter-parentを使用しています。
すべてのプロジェクトは正常に構築されており、すべての単体テストも実行されています。しかし、今日、私はeurekaを使用したサービス検出が機能しないことを発見しました。
テストのために、私は通常、最初にユーレカサーバーを起動し、それが完全に起動するのを待ちます。その後、クライアントを起動して登録できるようにします。問題は、最初のクライアントサービスを開始するとすぐに、eurekaサーバーがシャットダウンして再起動を試み、最初に開始したときにそこになかった多くの例外がスローされることです。
結局、落ち着いたように見えても、発見できないためか、サービスを呼び出すことができません。
ここに私のセットアップに関するいくつかの詳細：
私は、spring-boot-starter-parentから派生したカスタムの親POMを使用します。
<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>
私のeurekaサーバーサービスのPOMは次のとおりです。
<?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>
注目に値する1つのこと：私のeurekaサーバーサービスはeurekaクライアント自体です。
これは、application.ymleurekaサーバーサービスからの私です。
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
クライアントのapplication.ymlの例として、これは私のAPI-Gatewayサービスのapplication.ymlであり、eurekaサーバーに登録されます。
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
どのクライアントサービスを開始するかは重要ではないようです。
セットアップの詳細が必要な場合はお知らせください。
これが私のeurekaサーバーの出力です。
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: 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)
これは、他のサービスが開始されていない、それ自体が生成する出力です。
しばらく実行した後、次のような出力が追加されます。
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/", "/"]
好きなだけ実行できます。別のサービスを開始するとすぐに、以下がeurekaサーバーの出力に出力されます。
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)
その後、実行を続けます。
この出力で複数回発生する部分には、次の警告があります。
13:22:23.658 ERROR com.netflix.discovery.DiscoveryClient : DiscoveryClient_SERVICEDIRECTORY/xxxComputer.fritz.box:ServiceDirectory:8099 - ...(more stuff)
ホスト名のfritz.box（私のルーター）からわかるように、私は自宅で仕事をしています。ルーターを使用してLAN全体に登録しようとしているのはなぜかと思ったので、ログに残しました。単に「localhost」を使用してはいけませんか？
クライアント側では、以下が出力されます：
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: 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
一見大丈夫なようです。
これまでに試みたのは、問題が異なるバージョンの春の雲で発生するかどうかをテストすることです。私はスプリングブートの2.2.xリリースを使用しているため、スプリングクラウドのHoxtonリリースのみが考慮されます。しかし、多分私はその仮定を広げるべきです。
コンピュータを再起動しました。
別のクライアントを起動しても問題が解決しないかどうかをテストしました。
面白いのは、クライアントを起動するとすぐにeurekaサーバーが再起動することです。リクエストが受信されるのを待つようにも見えません。
誰かがこの問題の解決策を見つけるのを手伝ってくれる？
回避策を見つけました。この問題は、バージョン11.3（現在最新）で使用しているNetbeansに関連しているようです。
mvnコマンドラインから使用し、別のjava端末でサービスを開始すると、問題はなくなりました。
なぜNetbeansがこの問題を引き起こすのかわかりません。
現時点では、この回避策は問題ありません。この問題を閉じます。
この記事はインターネットから収集されたものであり、転載の際にはソースを示してください。
侵害の場合は、連絡してください[email protected]
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