Comment 7 for bug 1285215

from ubuntu-phone mailer
xnox said
"File socket should not be used at all, as they are known to be racy
and can easily end up stale, instead an abstract unix domain socket
should be used throughout.

This is not the first time, where stale, and not properly cleared file
sockets in mir are causing severe breakage on touch.

With an abstract socket, there is no file on a filesystem, and thus
when a process is gone the socket is also gone. You can see examples
of abstract sockets in: upstart, dbus-daemon, and plenty of other
system level daemons on ubuntu."