bug#48468: substitute server connection timeout

[Mathieu Othacehe]

Hello,

> You mentioned on IRC that nginx logs show that ‘guix publish’ times out.
> Looking at /var/log/nginx/error.log, I see “Connection reset by peer”
> and “Broken pipe”, which could indicate that the client closed the
> connection (which was open) prematurely, maybe due to an internal
> timeout.

Could it be that the client is receiving 404 because the baking of some
NAR was deferred to a worker, and then it closes the connection?

I think that's what I had in mind with the patch 2/2 of this patchset:
https://issues.guix.gnu.org/50040.

Thanks,

Mathieu