[CentOS] Bullet proof cron job???
William L. Maltby
CentOS4Bill at triad.rr.com
Fri Sep 22 12:17:10 UTC 2006
On Fri, 2006-09-22 at 11:17 +0100, Will McDonald wrote:
> On 22/09/06, Les Mikesell <lesmikesell at gmail.com> wrote:
> > On Thu, 2006-09-21 at 22:14, Ted Miller wrote:
> > > I have a cron job that runs once a day. There are times when it runs that
> > > it disrupts other things on the computer, so I want to kill it. Under
> > > Mandriva I had no problems killing the process, and that was the end of
> > > that. Under Centos I cannot kill it with a sig 15 or a sig 9.<snip>
> I've seen zombied processes in the past that have been impossible to kill.
Linux can't be that far removed from other *IX systems, can it? A
Zombied process is one that is dead already. But the parent has not
processed the "death of child" (usually/always(?) because the parent is
dead or sleeping while waiting for some event that never comes.
Regardless, the zombie should be scary but really harmless, no? It can
Being an older-timer, I'm subject to correction, of course.
> Is this process in state 'Z' under ps?
Nothing in there makes me thing otherwise: a zombie is only scary. Bugs
are, of course, excluded in this consideration.
> <snip sig stuff>
My *guess*, Will, is that some related process got orphaned and
overlooked when you/someone was trying to "terminate with prejudice" an
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