SimonCqk opened a new issue, #2683:
URL: https://github.com/apache/brpc/issues/2683
**Describe the bug (描述bug)**
在我的应用场景中，集成了brpc的多种操作，通过request_attachment或response_attachment收发，包含append、append_with_user_data、swap等多个动作，现尝试启用rdma，但还没有端到端跑通（brpc内置的rdma
example已经跑通）
**To Reproduce (复现方法)**
同时在日志中，存在：
W0706 14:41:19.870314 12521 rdma_endpoint.cpp:567] Fail to read Hello
Message from client:Socket{id=102 fd=1057 addr=33.99.77.245:38992:19733}
(0x0x7f0c83d23cc0) 33.99.77.245:38992
**疑问**
1. global initialize确认生效，尝试了在所有append_user_data的地方都register memeory，没有明显效果；
2. 后面将所有append_user_data直接改成了append，直接copy，也还是会core；
3. 可能导致core的原因有哪些？目前阻塞住了
**Versions (各种版本)**
OS:
Compiler:
brpc:
protobuf:
**Additional context/screenshots (更多上下文/截图)**
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