Re: /etc/namedb->_at_ referrs to NIL after crash or typing "reboot" (not shutdown -r)

On Sat, 17 Aug 2013 10:42:07 -0700
Tim Kientzle <tim_at_kientzle.com> wrote:

> 
> On Aug 17, 2013, at 10:35 AM, O. Hartmann wrote:
> 
> > On Sat, 17 Aug 2013 21:10:49 +0400
> > Boris Samorodov <bsam_at_passap.ru> wrote:
> > 
> >> 17.08.2013 13:36, O. Hartmann пишет:
> >> 
> >>> I can reproduceable truncate the link in /etc/ to be NIL by typing
> >>> simply "reboot" when rebooting the box
> >> 
> >> Does it make any difference if you use "shutdown -r" instead?
> >> 
> > 
> > Yes, when using "shutdown -r" the link isn't broken and the system
> > reboots and operates as expected. Only if I use the "quick and dirty
> > way" via "reboot" or after a crash when service named ahs already
> > been started the link is dead. If a crahs occurs BEFORE service
> > named has been started, the recovery is also operable - this is my
> > observation.
> 
> Does "reboot" show the same problem If the system has been running
> for a while (at least 15 minutes or so)?

Yes, of course.

> 
> Your broken link sounds like the expected behavior when you
> do a dirty reboot shortly after the link has been created (before
> the link contents have been written all the way to disk).
> 
> But the broken /etc/namedb link shouldn't prevent named from
> restarting after the reboot; maybe we should change the named
> startup scripts to test this link and delete/recreate it if it's
> broken?
> 
> Tim