caozhi6655 opened a new issue, #7298:
URL: https://github.com/apache/apisix/issues/7298
### Description
I use apisix for grpc proxy。I use a custom lua plugin to process the
request，when some request param not right，i return code like：
`
core.response.add_header("Content-Type", "application/grpc")
core.response.add_header("grpc-status", "16")
core.response.add_header("grpc-message",
"UNAUTHENTICATED")
core.response.add_header("test", "httt")
return 200
`
and I use a grpc tool "bloom-rpc" to debug the request，then the "bloom-rpc"
return like
` "error": "2 UNKNOWN: No status received"
`
and I tried golang client to debug，it returns err
`server closed the stream without sending trailers`。
I don't know why，and i debuged a whole day。。。
and when i set the status code 200 -> 599，it worked。。
so i what know why？
and another question，it works well in kong the code like that
`return kong.response.exit(200, nil, {
["Content-Type"] = "application/grpc",
["grpc-status"] = 16,
["grpc-message"] = "UNAUTHENTICATED"
})`
Hope the answer! Thanks very well!
### Environment
- APISIX version (run `apisix version`):2.13
- Operating system (run `uname -a`):centos os 7.9
- OpenResty / Nginx version (run `openresty -V` or `nginx -V`):
- etcd version, if relevant (run `curl
http://127.0.0.1:9090/v1/server_info`):
- APISIX Dashboard version, if relevant:
- Plugin runner version, for issues related to plugin runners:
- LuaRocks version, for installation issues (run `luarocks --version`):
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