本文探讨了在Spring Cloud Greenwich.RELEASE版本中使用Zuul时遇到的Bean注册冲突问题，具体表现为在同一类路径资源中定义了同名Bean，且不允许覆盖。文章提供了两种解决方案：一是考虑重命名其中一个Bean；二是启用Bean定义覆盖，通过设置spring.main.allow-bean-definition-overriding=true。
Description:
The bean 'proxyRequestHelper', defined in class path resource [org/springframework/cloud/netflix/zuul/ZuulProxyAutoConfiguration$NoActuatorConfiguration.class], could not be registered. A bean with that name has already been defined in class path resource [org/springframework/cloud/netflix/zuul/ZuulProxyAutoConfiguration$EndpointConfiguration.class] and overriding is disabled.
Action:
Consider renaming one of the beans or enabling overriding by setting spring.main.allow-bean-definition-overriding=true
Finchley.RELEASE仅对2.0支持，Greenwich.RELEASE对2.1支持，在springcloud官网中有对应关系
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