springboot+dubbo+seata0.8.1 生产者消费者分开部署产生的问题

环境：springboot+dubbo+seata0.8.1
模块1：api模块 @TwoPhaseBusinessAction所在
模块2：consumer @GlobalTransactional所在
模块3：provider 接口服务的实现
现象：Begin new global transaction [192.168.3.167:8091:2023542992]
[192.168.3.167:8091:2023542992] commit status:Committed
完全分开实现的seata的tcc模式，全局事务刚开始就提交了，并且provider中提供的commit方法并没有执行。consumer中的try接口中获取的BusinessActionContext参数获取为null。

Start by reproducing the three-module deployment described: api with @TwoPhaseBusinessAction, consumer with @GlobalTransactional, and provider with the service implementation. Trace how the global transaction begins and commits, why the provider commit method is skipped, and why BusinessActionContext is null in the consumer try method. Done means the transaction behavior and context propagation issue are explained and a concrete fix is identified.

Written by the indexing model from the issue text.