When building the Spring Cloud project, different versions of jars were introduced, causing an error to be reported when the project started:
main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - canceling refresh attempt: org.springframework.beans.factory.BeanDefinitionStoreException: Failed to process import candidates for configuration class [org.jd.auth.data.s security.server.eureka.SSOEurekaApplication]; nested exception is java.lang.IllegalArgumentException: Could not find class [org.springframework.cloud.client.loadbalancer.reactive.OnNoRibbonDefaultCondition] 2023-07-05 22:58:30.498 INFO 12284 --- [ main] ConditionEvaluationReportLoggingListener : Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 2023-07-05 22:58:30.519 ERROR 12284 --- [ main] o.s.boot.SpringApplication : Application run failed org.springframework.beans.factory.BeanDefinitionStoreException: Failed to process import candidates for configuration class [org.jd.auth.data.security.server.eureka.SSOEurekaApplication]; nested exception is java.lang.IllegalArgumentException: Could not find class [org .springframework.cloud.client.loadbalancer.reactive.OnNoRibbonDefaultCondition] at org.springframework.context.annotation.ConfigurationClassParser.processImports(ConfigurationClassParser.java:609) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE] at org.springframework.context.annotation.ConfigurationClassParser.access$800(ConfigurationClassParser.java:110) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE] at org.springframework.context.annotation.ConfigurationClassParser$DeferredImportSelectorGroupingHandler.lambda$processGroupImports$1(ConfigurationClassParser.java:811) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE] at java.util.ArrayList.forEach(ArrayList.java:1257) ~[na:1.8.0_221] at org.springframework.context.annotation.ConfigurationClassParser$DeferredImportSelectorGroupingHandler.processGroupImports(ConfigurationClassParser.java:808) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE] at org.springframework.context.annotation.ConfigurationClassParser$DeferredImportSelectorHandler.process(ConfigurationClassParser.java:779) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE] at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:192) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE] at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:319) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE] at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:236) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE] at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:275) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE] at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:95) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE] at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:706) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:532) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE] at org.jd.auth.data.security.server.eureka.SSOEurekaApplication.main(SSOEurekaApplication.java:14) [classes/:na] Caused by: java.lang.IllegalArgumentException: Could not find class [org.springframework.cloud.client.loadbalancer.reactive.OnNoRibbonDefaultCondition] at org.springframework.util.ClassUtils.resolveClassName(ClassUtils.java:335) ~[spring-core-5.2.5.RELEASE.jar:5.2.5.RELEASE] at org.springframework.context.annotation.ConditionEvaluator.getCondition(ConditionEvaluator.java:124) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE] at org.springframework.context.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:96) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE] at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:225) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE] at org.springframework.context.annotation.ConfigurationClassParser.processMemberClasses(ConfigurationClassParser.java:371) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE] at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:271) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE] at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:249) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE] at org.springframework.context.annotation.ConfigurationClassParser.processImports(ConfigurationClassParser.java:599) ~[spring-context-5.2.5.RELEASE.jar:5.2.5.RELEASE] ... 19 common frames omitted Caused by: java.lang.ClassNotFoundException: org.springframework.cloud.client.loadbalancer.reactive.OnNoRibbonDefaultCondition at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[na:1.8.0_221] at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_221] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) ~[na:1.8.0_221] at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_221] at java.lang.Class.forName0(Native Method) ~[na:1.8.0_221] at java.lang.Class.forName(Class.java:348) ~[na:1.8.0_221] at org.springframework.util.ClassUtils.forName(ClassUtils.java:285) ~[spring-core-5.2.5.RELEASE.jar:5.2.5.RELEASE] at org.springframework.util.ClassUtils.resolveClassName(ClassUtils.java:325) ~[spring-core-5.2.5.RELEASE.jar:5.2.5.RELEASE] ... 26 common frames omitted
After careful investigation, it is found that the project has introduced two versions of the same jar. Check the imported jar package, and the screenshot is as follows: The red part is the conflicting jar in the project. Two versions (2.13 and 2.2.6) have been introduced through maven coordinates. You can use the maven-help plug-in to view and operate to eliminate conflicting jars;
Install the plug-in in idea, as shown in the figure below, click Installed to install and restart IDEA………………………
The following introduces the use of the Maven Helper plug-in: After installing the plug-in, open the pom.xml file in the idea, and you can see the following words: Dependency Analyzer;
Click: Dependency Analyzer option to switch to the following picture:
Finally: the climax comes, by right-clicking on the dependency with the red words in the border, you can exclude the jar from the attached main jar package, just right-click –> Exclud option; as shown in the figure below:
Go back to the pom.xml file again, and you can see that the exclusion tag and the corresponding jar package are automatically added
