springboot与dubbo的版本匹配问题

springboot与dubbo的版本匹配

参考：

项目里原始版本

springboot:2.1.6.RELEASE
dubbo-spring-boot-starter : 0.2.1.RELEASE
dubbo: 2.6.5

上面这么写是可以正常运行的。但是当把dubbo升级到2.6.7时候，却报错了，异常如下：

升级到2.6.7后错误日志

Description:

The bean 'dubboConfigConfiguration.Single', defined in null, could not be registered. A bean with that name has already been defined in null and overriding is disabled.

Action:

Consider renaming one of the beans or enabling overriding by setting spring.main.allow-bean-definition-overriding=true

后来经过尝试，把springboot的版本下调到2.0.9时候，项目可以正常启动。

所以得到下面这个版本匹配的结论：

2.7版本以下的，使用的是alibaba目录下的jar,

springbootdubbo-springdubbo注1.x0.1.2.RELEASE2.6.5+2.6.6以上的dubbo需要配置netty-alljar包2.0.0~2.0.90.2.1.RELEASE2.6.5/2.6.6/2.6.72.1.x0.2.1.RELEASE2.6.5 /2.7.1

2.7版本以上的，用apache目录下面的jar，dubbo-spring和dubbo都使用apache下面的版本，统一使用2.7即可，springboot也可以用2.1.x以上

springboot+dubbo版本对应关系

背景

springboot 和 dubbo 在 pom.xml 中的版本是有对应关系的，如果配置的依赖不按照对应关系配置的话项目启动就会报错，报错的信息如下所示：

java.lang.IllegalStateException: Cannot load configuration class: com.alibaba.boot.dubbo.autoconfigure.DubboAutoConfiguration
at org.springframework.context.annotation.ConfigurationClassPostProcessor.enhanceConfigurationClasses(ConfigurationClassPostProcessor.java:403) ~[spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanFactory(ConfigurationClassPostProcessor.java:249) ~[spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:283) ~[spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:127) ~[spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:687) ~[spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:525) ~[spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
at com.ProviderApplication.main(ProviderApplication.java:13) [classes/:na]

对应关系

我在项目中使用的阿里巴巴的 dubbo-spring-boot-starter 版本是 0.2.0 ，maven 依赖如下所示：

									<dependency>

									    <groupId>com.alibaba.boot</groupId>

									    <artifactId>dubbo-spring-boot-starter</artifactId>

									    <version>0.2.0</version>

									</dependency>