> No concurrency.
> That's what I do: ./t5551-http-fetch-smart.sh

Oh ok! I was just trying to weed out what could out of place. Just to
make sure, your old compute is also running debian 8 latest? 
> 
> > - You probably want to see the version of apache this is running/etc.
> 
> The one that comes with Debian -
> I am not an expert here, what is it that is interesting ?

I'm not sure, but sometimes it's helpful to look at changelogs between
versions of packages to get a poiner as to what could be wrong. I wonder
if it's apache the one that's failing on this case. Probably a paste of
dpkg-query --show apache would help me try to reproduce..

> 
> > - What happens if you kill the apache processes? 
> 
> I am left with these processes:
> /home/blabla/pu/git -C too-many-refs fetch -q --tags
> /home/blabla/pu/git-remote-http origin http://127.0.0.1:5551/smart/repo.git
> 

So it's probably not an issue with apache, as the socket should be
hopefully closed gracefully.

> > 
> > I can't reproduce on my side, but let me see if I can dig a little into
> > it.
> 
> Thanks, more tips or things I can do are welcome.
> t5551 seems to be flaky - from time to time.
> It seems that I have it reproducable unstable, so if someone has more
> ideas, please.

I'm still unable to reproduce. Do you think you can enable GIT_TRACE,
GIT_TRACE_PACK and GIT_TRACE_CURL and pastebin/paste what you see?

Cheers!
-Santiago.