引入nacos 报错java.lang.IllegalStateException: Error processing condition on com.alibaba.cloud.nacos.loa

原创已于 2024-05-18 15:48:05 修改 · 1.5k 阅读

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#spring boot #后端 #java #intellij-idea #spring cloud #log4j

于 2024-05-18 15:47:06 首次发布

springboot项目引入nacos服务依赖报错,

springboot版本:2.7.4

spring-cloud版本2021.0.4

spring-cloud-alibaba版本2021.0.4.0

<!--nacos 服务注册发现-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

完整报错信息:

15:17:21:310 ERROR 15820 --- [           main] o.s.boot.SpringApplication               : Application run failed

java.lang.IllegalStateException: Error processing condition on com.alibaba.cloud.nacos.loadbalancer.NacosLoadBalancerClientConfiguration.nacosLoadBalancer
	at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:60) ~[spring-boot-autoconfigure-2.7.4.jar:2.7.4]
	at org.springframework.context.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:108) ~[spring-context-5.3.23.jar:5.3.23]
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForBeanMethod(ConfigurationClassBeanDefinitionReader.java:193) ~[spring-context-5.3.23.jar:5.3.23]
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:153) ~[spring-context-5.3.23.jar:5.3.23]
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:129) ~[spring-context-5.3.23.jar:5.3.23]
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:343) ~[spring-context-5.3.23.jar:5.3.23]
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:247) ~[spring-context-5.3.23.jar:5.3.23]
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:311) ~[spring-context-5.3.23.jar:5.3.23]
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:112) ~[spring-context-5.3.23.jar:5.3.23]
	at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:746) ~[spring-context-5.3.23.jar:5.3.23]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:564) ~[spring-context-5.3.23.jar:5.3.23]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147) ~[spring-boot-2.7.4.jar:2.7.4]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:734) ~[spring-boot-2.7.4.jar:2.7.4]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) ~[spring-boot-2.7.4.jar:2.7.4]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:308) ~[spring-boot-2.7.4.jar:2.7.4]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1306) ~[spring-boot-2.7.4.jar:2.7.4]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1295) ~[spring-boot-2.7.4.jar:2.7.4]
	at com.JinyiItemApplication.main(JinyiItemApplication.java:12) ~[classes/:na]
Caused by: java.lang.IllegalStateException: @ConditionalOnMissingBean did not specify a bean using type, name or annotation and the attempt to deduce the bean's type failed
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition$Spec.validate(OnBeanCondition.java:494) ~[spring-boot-autoconfigure-2.7.4.jar:2.7.4]
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition$Spec.<init>(OnBeanCondition.java:443) ~[spring-boot-autoconfigure-2.7.4.jar:2.7.4]
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchOutcome(OnBeanCondition.java:154) ~[spring-boot-autoconfigure-2.7.4.jar:2.7.4]
	at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:47) ~[spring-boot-autoconfigure-2.7.4.jar:2.7.4]
	... 17 common frames omitted
Caused by: org.springframework.boot.autoconfigure.condition.OnBeanCondition$BeanTypeDeductionException: Failed to deduce bean type for com.alibaba.cloud.nacos.loadbalancer.NacosLoadBalancerClientConfiguration.nacosLoadBalancer
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition$Spec.deducedBeanTypeForBeanMethod(OnBeanCondition.java:524) ~[spring-boot-autoconfigure-2.7.4.jar:2.7.4]
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition$Spec.deducedBeanType(OnBeanCondition.java:513) ~[spring-boot-autoconfigure-2.7.4.jar:2.7.4]
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition$Spec.<init>(OnBeanCondition.java:436) ~[spring-boot-autoconfigure-2.7.4.jar:2.7.4]
	... 19 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.cloud.loadbalancer.core.ReactorLoadBalancer
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:583) ~[na:na]
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178) ~[na:na]
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521) ~[na:na]
	at java.base/java.lang.Class.forName0(Native Method) ~[na:na]
	at java.base/java.lang.Class.forName(Class.java:398) ~[na:na]
	at org.springframework.boot.autoconfigure.condition.FilteringSpringBootCondition.resolve(FilteringSpringBootCondition.java:108) ~[spring-boot-autoconfigure-2.7.4.jar:2.7.4]
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition$Spec.getReturnType(OnBeanCondition.java:532) ~[spring-boot-autoconfigure-2.7.4.jar:2.7.4]
	at org.springframework.boot.autoconfigure.condition.OnBeanCondition$Spec.deducedBeanTypeForBeanMethod(OnBeanCondition.java:520) ~[spring-boot-autoconfigure-2.7.4.jar:2.7.4]
	... 21 common frames omitted


Process finished with exit code 1

这段日志显示了一个Spring Boot应用程序在启动时遇到了错误。错误的核心是java.lang.IllegalStateException，这通常表明Spring Boot在处理条件注解时遇到了问题。具体来说，错误信息指出@ConditionalOnMissingBean注解没有正确指定一个bean的使用类型、名称或注解，并且在尝试推断bean类型时失败了。

具体的错误链如下：

IllegalStateException: 由于@ConditionalOnMissingBean注解没有正确指定bean，导致Spring Boot无法确定是否应该创建这个bean。
OnBeanCondition$BeanTypeDeductionException: Spring Boot尝试推断com.alibaba.cloud.nacos.loadbalancer.NacosLoadBalancerClientConfiguration.nacosLoadBalancer方法的返回类型时失败了。
ClassNotFoundException: 无法找到org.springframework.cloud.loadbalancer.core.ReactorLoadBalancer类，这通常是因为缺少相关的依赖库。

(1) 刚开始参考官方文档GitHub - alibaba/spring-cloud-alibaba: Spring Cloud Alibaba provides a one-stop solution for application development for the distributed solutions of Alibaba middleware.

以为是版本问题

于是修改版本为2.6.5,仍然报同样的错误

来来回回改了好几次版本,仍然报错

(2) 后来查了半天,仔细看报错信息,尝试引入依赖

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-loadbalancer</artifactId>
</dependency>

于是再次启动项目,成功!

返回nacos网页管理页面,发现注册成功

总结:

要解决这个问题，可以尝试以下步骤：

确保你的项目包含了所有必要的依赖。根据错误信息，看起来是缺少了Spring Cloud LoadBalancer相关的依赖。你需要在你的pom.xml或build.gradle文件中添加相应的依赖。
检查com.alibaba.cloud.nacos.loadbalancer.NacosLoadBalancerClientConfiguration类中的nacosLoadBalancer方法，确保它返回的是一个有效的bean类型。
如果你正在使用Spring Cloud的版本管理工具（如Spring Cloud Release Train或Spring Cloud Platform），确保所有相关的Spring Cloud组件版本是兼容的。
清理并重新构建项目，有时候IDE或构建工具可能会缓存旧的依赖信息。
如果问题仍然存在，尝试查看Spring Boot和Spring Cloud的官方文档，或者在社区论坛和Stack Overflow上搜索类似问题。
考虑升级到最新版本的Spring Boot和Spring Cloud，因为新版本可能修复了你遇到的问题。