Hello!

On Thu, Jun 23, 2022 at 07:47:09PM +0800, Wenjun wrote:

> We use nginx as the cluster ingress provider, and hit the case
> when:
> 1. enabled proxy_cache, and the specific cache is expired
> 2. nginx is reloading config
> then for incoming request, the backend servers can still receive
> the request and send back response to nginx, while client will
> receive "curl: (52) Empty reply from server".
>
>
> It seems nginx reload may cause the connection break?
>
>
> attached debug log below:

From the debug log it looks like an issue with "aio_write", as
documented here:

https://trac.nginx.org/nginx/ticket/2162

Switching off "aio_write" should fix this if this issue manifests
itself in your particular setup.

Note that you are writing to the mailing list dedicated to nginx
development. Unless you are willing to submit patches, please
avoid further user-level posts here. If you have additional
questions, please use the nginx@ mailing list instead. Thank you.

Note well that posting logs as images might not be a good idea.
Posting plain text logs is generally a much better idea. Thank
you again.

--
Maxim Dounin
http://mdounin.ru/
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