maplezhang97 opened a new issue, #10787:
URL: https://github.com/apache/apisix/issues/10787
### Description
I need use two plugins: grpc-transcode and ext-plugin-post-resp.
There is no problem with these two plugins when used alone, but some
problems occur when they are used together.
When i use grpc-transcode and ext-plugin-post-resp together,
the api response is :
```
{
"code": 5,
"message": "Not Found",
"details": []
}
```
and some errors in apisix:
```
access_by_lua(nginx.conf:292):2: in main chunk xxx
/apisix/apisix/init.lua:730: in function 'http_access_phase'
[C]: in function 'handle_upstream'
coroutine 0:
stack traceback:
[error] 57#57: *872933 lua entry thread aborted: runtime error:
/apisix/apisix/init.lua:730: attempt to call ngx.exec after sending out
response headers
```
both plugins do their job correctly, upstream grpc service receive the
request and returns right and ext-plugin-post-resp also print out logs after
grpc service returns.
I don't know how I should troubleshoot the problem next.
### Environment
- APISIX version : 3.6.0
- Operating system : Ubuntu 16.04.1 LTS
- OpenResty / Nginx version : nginx/1.20.1
- etcd version, if relevant : 3.5.0
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