heliang666s commented on issue #16000:
URL: https://github.com/apache/dubbo/issues/16000#issuecomment-3803387861

   This is not a transactional annotation failure, but a consequence of 
**different entry methods generated by Dubbo Triple**. For the Triple protocol, 
RPC calls actually enter the **generated service entry method** (e.g. 
`greet(req, StreamObserver)` or its async variant), not the `greet(req)` method 
where `@Transactional` was added. The current call path invokes `greet(req)` 
via **self-invocation**, which is not intercepted by Spring AOP, so the 
transaction does not take effect. To make transactions work for RPC calls, 
`@Transactional` must be applied to the actual RPC entry method, the class 
itself, or the transactional logic should be moved to another Spring Bean and 
invoked through a proxy. @cuihaohao 


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