[systemd-devel] [PATCH] Avoid reloading services when shutting down

[Lennart Poettering]

On Tue, 03.02.15 17:26, Martin Pitt (martin.pitt at ubuntu.com) wrote:

> Hey all,
> 
> I'm currently reviewing our Debian patches for systemd, and came
> across this one which sounds important for other distributions, too.
> This was reported and fixed two years ago in
> https://bugs.debian.org/635777 which has all the details and logs, but
> the summary is:
> 
> Distributions have quite a lot of "run scripts in this .d/ directory
> if stuff happens"; e. g. the ISC DHCP client has
> /etc/dhcp/dhclient-{enter,exit}-hooks.d/, Debian's ifupdown has
> /etc/network/if-{up,down}.d/, and of course init.d scripts themselves
> also occasionally call "service foo reload" and similar. It can happen
> that when requesting a shutdown, a script of the above kind reloads or
> restarts another service. In this case, postfix wants to reload itself
> after a network interface goes up or down; during runtime that works
> fine, but if it happens during shutdown, that "systemctl reload
> postfix" will cause the entire shutdown to stall for 90s (the default
> timeout).

Hmm, why precisely does this stall for 90s? 

Isn't this a case where people should just use "--no-block"?

Lennart

-- 
Lennart Poettering, Red Hat