Caused by: java.lang.NoClassDefFoundError: org/springframework/boot/bind/RelaxedPropertyResolver - microservices

Question

I am working on Spring Boot + Microservices project. In this project, have developed "microservices-dashboard" project as well.

When I simply run this project, found the below error. I'm using spring-boot-starter-parent to <version>2.0.4.RELEASE</version>

Error:

org.springframework.beans.factory.BeanDefinitionStoreException: Failed to process import candidates for configuration class [com.its.MicroservicesDashboardApplication]; nested exception is java.lang.IllegalStateException: Could not evaluate condition on de.codecentric.boot.admin.config.SpringBootAdminClientAutoConfiguration due to org/springframework/boot/bind/RelaxedPropertyResolver not found. Make sure your own configuration does not rely on that class. This can also happen if you are @ComponentScanning a springframework package (e.g. if you put a @ComponentScan in the default package by mistake)
    at org.springframework.context.annotation.ConfigurationClassParser.processImports(ConfigurationClassParser.java:646) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassParser.lambda$processDeferredImportSelectors$2(ConfigurationClassParser.java:566) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
    at java.util.ArrayList.forEach(Unknown Source) ~[na:1.8.0_162]
    at org.springframework.context.annotation.ConfigurationClassParser.processDeferredImportSelectors(ConfigurationClassParser.java:563) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:188) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:316) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:233) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:271) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:91) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:694) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:532) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:762) [spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:398) [spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:330) [spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1258) [spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1246) [spring-boot-2.0.4.RELEASE.jar:2.0.4.RELEASE]
    at com.its.MicroservicesDashboardApplication.main(MicroservicesDashboardApplication.java:15) [classes/:na]
Caused by: java.lang.IllegalStateException: Could not evaluate condition on de.codecentric.boot.admin.config.SpringBootAdminClientAutoConfiguration due to org/springframework/boot/bind/RelaxedPropertyResolver not found. Make sure your own configuration does not rely on that class. This can also happen if you are @ComponentScanning a springframework package (e.g. if you put a @ComponentScan in the default package by mistake)
    at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:55) ~[spring-boot-autoconfigure-2.0.4.RELEASE.jar:2.0.4.RELEASE]
    at org.springframework.context.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:108) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:221) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassParser.processImports(ConfigurationClassParser.java:636) ~[spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
    ... 17 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/springframework/boot/bind/RelaxedPropertyResolver
    at de.codecentric.boot.admin.config.SpringBootAdminClientEnabledCondition.isEnabled(SpringBootAdminClientEnabledCondition.java:59) ~[spring-boot-admin-starter-client-1.3.3.jar:1.3.3]
    at de.codecentric.boot.admin.config.SpringBootAdminClientEnabledCondition.getMatchOutcome(SpringBootAdminClientEnabledCondition.java:45) ~[spring-boot-admin-starter-client-1.3.3.jar:1.3.3]
    at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:47) ~[spring-boot-autoconfigure-2.0.4.RELEASE.jar:2.0.4.RELEASE]
    ... 20 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.bind.RelaxedPropertyResolver
    at java.net.URLClassLoader.findClass(Unknown Source) ~[na:1.8.0_162]
    at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.8.0_162]
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) ~[na:1.8.0_162]
    at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.8.0_162]
    ... 23 common frames omitted

MicroservicesDashboardApplication.java

@SpringBootApplication
@EnableDiscoveryClient
@EnableMicroservicesDashboardServer
public class MicroservicesDashboardApplication {

    public static void main(String[] args) {
        SpringApplication.run(MicroservicesDashboardApplication.class, args);
    }
}

application.yml

spring:
  application:
    name: microservices-dashboard

server:
  port: 8083

pom.xml

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.4.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <spring-cloud.version>Finchley.SR1</spring-cloud.version>
    </properties>

    <dependencies>
        <!-- Actuator -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

        <!-- Web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- Eureka Server -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>

        <!-- MS Dashboard Server -->
        <dependency>
            <groupId>be.ordina</groupId>
            <artifactId>microservices-dashboard-server</artifactId>
            <version>1.0.1</version>
        </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>
        </dependencies>
    </dependencyManagement>

Answer 1

Like Simon Martinelli already said, the microservices dashboard is not compatible with Spring Boot 2. We are aware of this issue and already did some research on the matter.

Because most of us are not working at a company which has its main focus on open source, we are forced to work on this project during our free time. Unfortunately due to passed and recent events this project didn't receive the work/love it deserves to have. However, it still is our intention to continue the work on this project.

Answer 2

microservices-dashboard-server is not compatible with Spring Boot 2

And as I see the last commit is older than a year I assume that this is no longer developed.