Issue
I’m building the Spring Boot Admin code and getting the below error.
pom.xml
<?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 https://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>2.4.2</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>admin-server</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>admin-server</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-boot-admin.version>2.3.1</spring-boot-admin.version>
<spring-cloud.version>2020.0.2</spring-cloud.version>
</properties>
<dependencies>
<!-- Spring Boot Admin -->
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-starter-server</artifactId>
</dependency>
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-server-ui</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-bootstrap</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<!-- Third-party librairies -->
<dependency>
<groupId>org.jolokia</groupId>
<artifactId>jolokia-core</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-dependencies</artifactId>
<version>${spring-boot-admin.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
bootstrap.yml
spring:
cloud:
config:
enabled: true
uri: http://localhost:9296
application:
name: admin-server
server:
port: 9090
eureka:
client:
register-with-eureka: true
fetch-registry: true
instance:
hostname: localhost
prefer-ip-address: true
AdminServerApplication.java
@SpringBootApplication
@EnableAdminServer
@EnableEurekaClient
public class AdminServerApplication {
public static void main(String[] args) {
SpringApplication.run(AdminServerApplication.class, args);
}
}
Error:
2021-05-04 13:39:12.290 WARN 36752 --- [ctor-http-nio-1] io.netty.resolver.dns.DnsQueryContext : Received a mismatching DNS response: DatagramDnsResponse(from: /172.30.160.1:53, to: /0:0:0:0:0:0:0:0:56414, 52280, QUERY(0), NoError(0), RD RA)
DefaultDnsQuestion(XXXXXXXXorg. IN A)
DefaultDnsRawRecord(XXXXXXXXorg. 171 IN A 4B)
DefaultDnsRawRecord(OPT flags:0 udp:4096 0B)
2021-05-04 13:39:12.882 INFO 36752 --- [ main] com.example.demo.AdminServerApplication : Started AdminServerApplication in 6.649 seconds (JVM running for 7.875)
2021-05-04 13:39:17.355 WARN 36752 --- [ctor-http-nio-1] io.netty.resolver.dns.DnsQueryContext : Received a mismatching DNS response: DatagramDnsResponse(from: /172.30.160.1:53, to: /0:0:0:0:0:0:0:0:56414, 3238, QUERY(0), NoError(0), RD AA RA)
DefaultDnsQuestion(XXXXXXXXorg. IN CNAME)
DefaultDnsRawRecord(corp.mastercard.org. 3600 IN SOA 56B)
DefaultDnsRawRecord(OPT flags:0 udp:4000 0B)
2021-05-04 13:39:22.211 INFO 36752 --- [ parallel-5] d.c.b.a.server.services.StatusUpdater : Couldn't retrieve status for Instance(id=162455d08d2a, version=0, registration=Registration(name=CONFIG-SERVER, managementUrl=http://XXXXXXXXorg:9296/actuator, healthUrl=http://XXXXXXXXorg:9296/actuator/health, serviceUrl=http://XXXXXXXXorg:9296, source=discovery), registered=true, statusInfo=StatusInfo(status=UNKNOWN, details={}), statusTimestamp=2021-05-04T08:09:12.195Z, info=Info(values={}), endpoints=Endpoints(endpoints={health=Endpoint(id=health, url=http://XXXXXXXXorg:9296/actuator/health)}), buildVersion=null, tags=Tags(values={}))
java.util.concurrent.TimeoutException: Did not observe any item or terminal signal within 10000ms in 'map' (and no fallback has been configured)
at reactor.core.publisher.FluxTimeout$TimeoutMainSubscriber.handleTimeout(FluxTimeout.java:294) ~[reactor-core-3.4.2.jar:3.4.2]
Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException:
Error has been observed at the following site(s):
|_ checkpoint ⇢ Request to GET health [DefaultWebClient]
Stack trace:
at reactor.core.publisher.FluxTimeout$TimeoutMainSubscriber.handleTimeout(FluxTimeout.java:294) ~[reactor-core-3.4.2.jar:3.4.2]
at reactor.core.publisher.FluxTimeout$TimeoutMainSubscriber.doTimeout(FluxTimeout.java:279) ~[reactor-core-3.4.2.jar:3.4.2]
at reactor.core.publisher.FluxTimeout$TimeoutTimeoutSubscriber.onNext(FluxTimeout.java:418) ~[reactor-core-3.4.2.jar:3.4.2]
at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onNext(FluxOnErrorResume.java:79) ~[reactor-core-3.4.2.jar:3.4.2]
at reactor.core.publisher.MonoDelay$MonoDelayRunnable.run(MonoDelay.java:119) ~[reactor-core-3.4.2.jar:3.4.2]
at reactor.core.scheduler.SchedulerTask.call(SchedulerTask.java:68) ~[reactor-core-3.4.2.jar:3.4.2]
at reactor.core.scheduler.SchedulerTask.call(SchedulerTask.java:28) ~[reactor-core-3.4.2.jar:3.4.2]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_171]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) ~[na:1.8.0_171]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) ~[na:1.8.0_171]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[na:1.8.0_171]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[na:1.8.0_171]
at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_171]
Solution
I was able to solve this issue. Basically all your microservices should use below configuration. Here prefer-ip-address: true and fetch-registry: true is the key here.
server:
port: 8002
spring:
application:
name: user-service
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://localhost:3306/test
username: root
password: root
jpa:
generate-ddl: true
hibernate:
ddl-auto: create
# zipkin:
# base-url: http://127.0.0.1:9411/
eureka:
client:
register-with-eureka: true
fetch-registry: true
instance:
prefer-ip-address: true
hostname: localhost
Answered By – Pra_A
This Answer collected from stackoverflow, is licensed under cc by-sa 2.5 , cc by-sa 3.0 and cc by-sa 4.0