We tested gRPC on ALB for the past week, we have found out following facts:
```
1. HTTP2 will be translated to HTTP 1.1, with the protobuf translated into 
chunked-encoding request body. And this body can be decoded on the upstream 
server;
2. ALB end the stream with a data frame without adding a trailer header 
frame, which is the gRPC client expecting. So the Go client library will 
just throw an error.
```
>From rfc7540, the trailer frame is not required, but it seems that the gRPC 
client requires it?
If so, is there a workaround for 3?

Thank you very much!

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