SpringCloud - Circular placeholder reference ‘xxx‘ in property definitions

比眉伴天荒 2022-09-10 03:16 153阅读 0赞

> org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'xxxController': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Circular placeholder reference 'spring.datasource.driver-class-name' in property definitions  
>     at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:380) ~\[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1411) ~\[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592) ~\[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~\[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~\[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~\[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~\[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~\[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:845) ~\[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877) ~\[spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~\[spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~\[spring-boot-2.1.7.RELEASE.jar:2.1.7.RELEASE\]  
>     at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:743) \[spring-boot-2.1.7.RELEASE.jar:2.1.7.RELEASE\]  
>     at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:390) \[spring-boot-2.1.7.RELEASE.jar:2.1.7.RELEASE\]  
>     at org.springframework.boot.SpringApplication.run(SpringApplication.java:312) \[spring-boot-2.1.7.RELEASE.jar:2.1.7.RELEASE\]  
>     at org.springframework.boot.SpringApplication.run(SpringApplication.java:1214) \[spring-boot-2.1.7.RELEASE.jar:2.1.7.RELEASE\]  
>     at org.springframework.boot.SpringApplication.run(SpringApplication.java:1203) \[spring-boot-2.1.7.RELEASE.jar:2.1.7.RELEASE\]  
>     at com.example.test\_env.TestEnvApplication.main(TestEnvApplication.java:10) \[classes/:na\]  
> Caused by: java.lang.IllegalArgumentException: Circular placeholder reference 'test.testenv:127.0.0.1' in property definitions  
>     at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:145) ~\[spring-core-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:166) ~\[spring-core-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:124) ~\[spring-core-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders(AbstractPropertyResolver.java:237) ~\[spring-core-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders(AbstractPropertyResolver.java:211) ~\[spring-core-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.core.env.AbstractPropertyResolver.resolveNestedPlaceholders(AbstractPropertyResolver.java:228) ~\[spring-core-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.core.env.PropertySourcesPropertyResolver.getProperty(PropertySourcesPropertyResolver.java:88) ~\[spring-core-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.core.env.PropertySourcesPropertyResolver.getProperty(PropertySourcesPropertyResolver.java:62) ~\[spring-core-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.core.env.AbstractEnvironment.getProperty(AbstractEnvironment.java:539) ~\[spring-core-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.context.support.PropertySourcesPlaceholderConfigurer$1.getProperty(PropertySourcesPlaceholderConfigurer.java:137) ~\[spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.context.support.PropertySourcesPlaceholderConfigurer$1.getProperty(PropertySourcesPlaceholderConfigurer.java:133) ~\[spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.core.env.PropertySourcesPropertyResolver.getProperty(PropertySourcesPropertyResolver.java:85) ~\[spring-core-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.core.env.PropertySourcesPropertyResolver.getPropertyAsRawString(PropertySourcesPropertyResolver.java:74) ~\[spring-core-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:151) ~\[spring-core-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:124) ~\[spring-core-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders(AbstractPropertyResolver.java:237) ~\[spring-core-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders(AbstractPropertyResolver.java:211) ~\[spring-core-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.context.support.PropertySourcesPlaceholderConfigurer.lambda$processProperties$0(PropertySourcesPlaceholderConfigurer.java:175) ~\[spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.beans.factory.support.AbstractBeanFactory.resolveEmbeddedValue(AbstractBeanFactory.java:851) ~\[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1192) ~\[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1171) ~\[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:593) ~\[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90) ~\[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374) ~\[spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE\]  
>     ... 17 common frames omitted

spring:
      datasource:
        driver-class-name: ${spring.datasource.driver-class-name}

比如这段 application.yml 配置，虽然这里是 yml 是冒号，这里 $\{\} 里面是点号，但是这样会产生循环依赖，所以这里跟 Nacos 上需要改下配置变量命名，命名不要一样即可。

spring:
      datasource:
        driver-class-name: ${nacos.spring.datasource.driver-class-name}

这样就对了！！！