I'm in the midst of upgrading an app from Spring Boot 1.x to Spring Boot 2.x. When I attempted to run an existing (and previously working) unit test, I saw the following output:

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APPLICATION FAILED TO START
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Description:

The bean 'spring.sleuth.baggage-keys', defined in class path resource [org/springframework/cloud/sleuth/autoconfig/brave/BraveBaggageConfiguration.class], could not be registered. A bean with that name has already been defined in class path resource [org/springframework/cloud/sleuth/autoconfig/TraceBaggageConfiguration.class] and overriding is disabled.

Action:

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

My Gradle project uses the following implementation: 'org.springframework.cloud:spring-cloud-sleuth-core:2.2.8.RELEASE'

I tried checking with the Gradle dependencies task to make sure there were no conflicting versions of spring-cloud-sleuth-core and friends. I also looked at this post and this post and they didn't solve my problem.

I need to avoid overriding beans, and I'm currently constrained to Spring Boot 2.4.x for my deploy target.

CodePudding user response：

Check the compatibility matrix, you should use Spring Cloud 2020.0.x aka Ilford (Sleuth 3.x) with Spring Boot 2.4 (or 2.5).

Sleuth 2.2.8 is Spring Cloud Hoxton, it is not compatible with Boot 2.4.