Comment 1 for bug 451556

Thanks for the bugreport.

I can reproduce this now. It appears that upstart does refuses the connection when reboot tries to ask for reboot.
From the strace log:

connect(3, {sa_family=AF_FILE, path=@"/com/ubuntu/upstart"}, 22) = -1 ECONNREFUSED (Connection refused)

I attach the full log.