Bug#753790: systemd: process 1 should load new versions of shared objects

[Tollef Fog Heen]

]] Russell Coker 

> Why not?  A typical system only has a couple of dozen long running daemons and 
> for most of them there aren't many libraries that they link against (except 
> systemd).  Of the daemons that are long running there are only a few that may 
> cause difficulty to restart, that's systemd, xen daemons, an XDM, and 
> rsyslogd.

Restarting clamav will cause (temporary) problems with mail delivery,
restarting dovecot kills all current IMAP connections, there's no way to
restart gettys, screen and tmux can't be reasonably restarted, ditto for
KVM, restarting any of the XMPP servers will log out all clients, so
that's pretty disruptive, restarting openvpn will make existing
connections over the VPN hang until it's re-established, hopefully with
the same endpoints.

IME, very few daemons actually allow you to restart them with no visible
downtime or loss of state.

Those are just a random sample from my colo box, it would be trivial to
find more.

-- 
Tollef Fog Heen
UNIX is user friendly, it's just picky about who its friends are