java.lang.NoClassDefFoundError: org/springframework/boot/autoconfigure/web/embedded/NettyWebServerFactoryCustomizer

[devtizi]

-------------------------------------------------------------------------------
Test set: com.cnps.gateway.ApiGatewayApplicationTests
-------------------------------------------------------------------------------
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 4.928 s <<< FAILURE! -- in com.cnps.gateway.ApiGatewayApplicationTests
com.cnps.gateway.ApiGatewayApplicationTests.contextLoads -- Time elapsed: 0.038 s <<< ERROR!
java.lang.IllegalStateException: Failed to load ApplicationContext for [ReactiveWebMergedContextConfiguration@2d913116 testClass = com.cnps.gateway.ApiGatewayApplicationTests, locations = [], classes = [com.cnps.gateway.ApiGatewayApplication], contextInitializerClasses = [], activeProfiles = [], propertySourceDescriptors = [], propertySourceProperties = ["org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true"], contextCustomizers = [org.springframework.boot.web.server.context.SpringBootTestRandomPortContextCustomizer@24fb6a80, org.springframework.boot.test.context.PropertyMappingContextCustomizer@0, org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@21005f6c, org.springframework.boot.test.http.client.DisableReactorResourceFactoryGlobalResourcesContextCustomizerFactory$DisableReactorResourceFactoryGlobalResourcesContextCustomizerCustomizer@423e4cbb, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@25ddbbbb, org.springframework.boot.test.autoconfigure.OnFailureConditionReportContextCustomizerFactory$OnFailureConditionReportContextCustomizer@2a1edad4, org.springframework.test.context.support.DynamicPropertiesContextCustomizer@0, org.springframework.boot.micrometer.metrics.test.autoconfigure.MetricsContextCustomizerFactory$DisableMetricsExportContextCustomizer@1f, org.springframework.boot.test.context.SpringBootTestAnnotation@6fe226c8], contextLoader = org.springframework.boot.test.context.SpringBootContextLoader, parent = null]
	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.lambda$loadContext$0(DefaultCacheAwareContextLoaderDelegate.java:195)
	at org.springframework.test.context.cache.DefaultContextCache.put(DefaultContextCache.java:214)
	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:160)
	at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:128)
	at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:155)
	at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:111)
	at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:260)
	at org.springframework.test.context.junit.jupiter.SpringExtension.postProcessTestInstance(SpringExtension.java:205)
	at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)
	at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)
	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1708)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
	at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
	at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596)
	at java.base/java.util.Optional.orElseGet(Optional.java:364)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
Caused by: java.lang.IllegalStateException: Error processing condition on org.springframework.cloud.gateway.config.GatewayAutoConfiguration$NettyConfiguration.gatewayHttpClientFactory
	at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:60)
	at org.springframework.context.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:100)
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForBeanMethod(ConfigurationClassBeanDefinitionReader.java:196)
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:148)
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:124)
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:458)
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:310)
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:349)
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:118)
	at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:794)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:602)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:756)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:445)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:321)
	at org.springframework.boot.test.context.SpringBootContextLoader.lambda$loadContext$2(SpringBootContextLoader.java:156)
	at org.springframework.util.function.ThrowingSupplier.get(ThrowingSupplier.java:58)
	at org.springframework.util.function.ThrowingSupplier.get(ThrowingSupplier.java:46)
	at org.springframework.boot.SpringApplication.withHook(SpringApplication.java:1465)
	at org.springframework.boot.test.context.SpringBootContextLoader$ContextLoaderHook.run(SpringBootContextLoader.java:605)
	at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:156)
	at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:115)
	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:247)
	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.lambda$loadContext$0(DefaultCacheAwareContextLoaderDelegate.java:167)
	... 21 more
Caused by: java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.gateway.config.GatewayAutoConfiguration$NettyConfiguration] from ClassLoader [jdk.internal.loader.ClassLoaders$AppClassLoader@639fee48]
	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:483)
	at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:360)
	at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java:417)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.lambda$getTypeForFactoryMethod$0(AbstractAutowireCapableBeanFactory.java:750)
	at java.base/java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1708)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:749)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:683)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:655)
	at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1699)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:632)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:604)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:589)
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition.collectBeanDefinitionsForType(OnBeanCondition.java:334)
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getBeanDefinitionsForType(OnBeanCondition.java:323)
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchingBeans(OnBeanCondition.java:221)
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition.evaluateConditionalOnMissingBean(OnBeanCondition.java:204)
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchOutcome(OnBeanCondition.java:149)
	at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:47)
	... 43 more
Caused by: java.lang.NoClassDefFoundError: org/springframework/boot/autoconfigure/web/embedded/NettyWebServerFactoryCustomizer
	at java.base/java.lang.Class.getDeclaredMethods0(Native Method)
	at java.base/java.lang.Class.privateGetDeclaredMethods(Class.java:3580)
	at java.base/java.lang.Class.getDeclaredMethods(Class.java:2678)
	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:465)
	... 60 more
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.autoconfigure.web.embedded.NettyWebServerFactoryCustomizer
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526)
	... 64 more

[devtizi]

<?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>4.0.2</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.cnps</groupId>
	<artifactId>api-gateway</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>api-gateway</name>
	<description>api-gateway</description>
	<url/>
	<licenses>
		<license/>
	</licenses>
	<developers>
		<developer/>
	</developers>
	<scm>
		<connection/>
		<developerConnection/>
		<tag/>
		<url/>
	</scm>

	<properties>
		<java.version>21</java.version>
		<spring-cloud.version>2025.1.0</spring-cloud.version>
		<spring-cloud-gateway.version>4.2.0</spring-cloud-gateway.version>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-actuator</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-gateway</artifactId>
			<version>${spring-cloud-gateway.version}</version>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-webflux</artifactId>
		</dependency>
		
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
		</dependency>

		<!-- Pour les métriques distribuées -->
        <dependency>
            <groupId>io.micrometer</groupId>
            <artifactId>micrometer-tracing-bridge-brave</artifactId>
        </dependency>

		<!-- Pour les tests -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        
        <!-- Pour tester les réactifs -->
        <dependency>
            <groupId>io.projectreactor</groupId>
            <artifactId>reactor-test</artifactId>
            <scope>test</scope>
        </dependency>

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

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

</project>

[spencergibb]

I've edited your comment to improve the formatting. You might want to check out this Mastering Markdown guide for future reference.

You are mixing incompatible versions. Remove the spring-cloud-gateway.version property and use this dependency:

    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-gateway-server-webflux</artifactId>
    </dependency>

See start.spring.io https://start.spring.io/#!type=maven-project&language=java&platformVersion=4.0.2&packaging=jar&configurationFileFormat=yaml&jvmVersion=17&groupId=com.example&artifactId=demo&name=demo&description=Demo%20project%20for%20Spring%20Boot&packageName=com.example.demo&dependencies=cloud-gateway-reactive