wujun27 commented on issue #10278:
URL: https://github.com/apache/dubbo/issues/10278#issuecomment-1176370697
dubbo是在启动模块demo-application加入的dubbo依赖， Root Spring
context触发了org.apache.dubbo.config.spring.context.DubboSpringInitializer#initialize，这块是没问题的。
接下来demo-service是个sofa module，sofa会给这个模块初始化一个独立的Spring 上下文，
demo-service这个模块因为没有dubbo依赖，所以不会触发org.apache.dubbo.config.spring.context.DubboSpringInitializer#initialize。
但是demo-service的子beanFactory会从父beanFactory获取postBeanProcessBeans，
所以demo-service的子beanFactory
refresh的时候会触发DubboInfraBeanRegisterPostProcessor#postProcessBeanFactory，
然而ReferenceAnnotationBeanPostProcessor在Root
Spring上下文已经被自己销毁，所以模块的子Spring上下文和RootSpring上下文都找不到这个bean，最终报No bean named
'referenceAnnotationBeanPostProcessor' available。
demo-service模块本身就没有dubbo依赖，也不需要去触发org.apache.dubbo.config.spring.context.DubboSpringInitializer#initialize。
目前在本地，我把ReferenceAnnotationBeanPostProcessor如下这段代码注释掉以后就没有没问题的。
但不确定是否会有其他影响？
、、、
if (beanFactory instanceof AbstractBeanFactory) {
List<BeanPostProcessor> beanPostProcessors =
((AbstractBeanFactory) beanFactory).getBeanPostProcessors();
for (BeanPostProcessor beanPostProcessor : beanPostProcessors) {
if (beanPostProcessor == this) {
// This bean has been registered as BeanPostProcessor at
org.apache.dubbo.config.spring.context.DubboInfraBeanRegisterPostProcessor.postProcessBeanFactory()
// so destroy this bean here, prevent register it as
BeanPostProcessor again, avoid cause BeanPostProcessorChecker detection error
beanDefinitionRegistry.removeBeanDefinition(BEAN_NAME);
break;
}
}
}
、、、
这段注释也没看特别明白，DubboInfraBeanRegisterPostProcessor也没去注册ReferenceAnnotationBeanPostProcessor
bean，只是为了保证ReferenceAnnotationBeanPostProcessor比PropertySourcesPlaceholderConfigurer先执行。
、、、
// In Spring 3.2.x, registry may be null because do not calling
postProcessBeanDefinitionRegistry method before postProcessBeanFactory
if (registry != null) {
// register ReferenceAnnotationBeanPostProcessor early before
PropertySourcesPlaceholderConfigurer/PropertyPlaceholderConfigurer
// for processing early init ReferenceBean
ReferenceAnnotationBeanPostProcessor
referenceAnnotationBeanPostProcessor = beanFactory.getBean(
ReferenceAnnotationBeanPostProcessor.BEAN_NAME,
ReferenceAnnotationBeanPostProcessor.class);
beanFactory.addBeanPostProcessor(referenceAnnotationBeanPostProcessor);
// register PropertySourcesPlaceholderConfigurer bean if not exits
DubboBeanUtils.registerPlaceholderConfigurerBeanIfNotExists(beanFactory,
registry);
}
、、、
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