Bug修改日记：Bean异常: BeanCreationException

Bug修改日记

???? 作者简介：努力的clz ，一个努力编程的菜鸟 ????????????
 
???? 文章专栏：bug日志 ，记录一下平时开发过程中遇到的各种 疑难杂症 bug ???? 、分析过程以及解决办法。
 
????ʜᴀ͟ᴘ͟ᴘ͟ʏᴇᴠᴇʀʏᴅᴀʏ̆̈???? ???????????????????? ???????????? ???????????????????? ???????? ???????????????? ????????????????

一、报错信息

BeanCreationException ：Bean创造异常

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'initDataflowJob' defined in class path resource [com/clz/config/ElasticJobConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.dangdang.ddframe.job.lite.spring.api.SpringJobScheduler]: Factory method 'initDataflowJob' threw exception; nested exception is java.lang.NullPointerException: Cannot invoke "javax.sql.DataSource.getConnection()" because "this.dataSource" is null
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:627) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:607) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1305) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1144) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:849) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877) ~[spring-context-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142) ~[spring-boot-2.1.3.RELEASE.jar:2.1.3.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) ~[spring-boot-2.1.3.RELEASE.jar:2.1.3.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) ~[spring-boot-2.1.3.RELEASE.jar:2.1.3.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) ~[spring-boot-2.1.3.RELEASE.jar:2.1.3.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260) ~[spring-boot-2.1.3.RELEASE.jar:2.1.3.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248) ~[spring-boot-2.1.3.RELEASE.jar:2.1.3.RELEASE]
	at com.clz.ElasticJobApplication.main(ElasticJobApplication.java:10) ~[classes/:na]
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.dangdang.ddframe.job.lite.spring.api.SpringJobScheduler]: Factory method 'initDataflowJob' threw exception; nested exception is java.lang.NullPointerException: Cannot invoke "javax.sql.DataSource.getConnection()" because "this.dataSource" is null
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:622) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
	... 19 common frames omitted

二、问题分析

报错信息中显示，在 initDataflowJob 方法中错误创造了某个 bean，所以大概是 bean的映射问题，查看是否错误映射了某个 bean

三、解决办法

检查代码，发现某处要被使用的bean忘记添加对应注解，导致该bean未创建。（检查是否有 bean 重命名）

博主到了这里是成功解决了bug，也希望对读者的bug修复能起作用。????????????
不过可能不同的原因引发同样的bug，如果是其它的解决办法，能拜托把其它的解决方法链接分享到评论区吗，这样可以更加有效的帮助后来的读者去解决问题，共同进步，十分感谢！????????????

最后

以上就是顺利金毛为你收集整理的Bug修改日记：Bean异常: BeanCreationException的全部内容，希望文章能够帮你解决Bug修改日记：Bean异常: BeanCreationException所遇到的程序开发问题。

如果觉得靠谱客网站的内容还不错，欢迎将靠谱客网站推荐给程序员好友。