Re: runit not collecting zombies

[Gerrit Pape <pape@smarden.org>]

On Mon, Jun 18, 2007 at 04:45:16PM +0300, Alex Efros wrote:
> On Mon, Jun 11, 2007 at 04:11:12PM +0300, Alex Efros wrote:
> > > Can you please test the patch below?:
> > 
> > I've just installed runit-1.7.2 with that patch on my servers. I think if
> > after a week or two there will be no zombies, then it working. In last
> > week I didn't install it because I gather some statistics: looks like my
> > servers start producing uncollected zombies after ~3 days of work.
> 
> No, patch don't fixed this bug. :(
> 
> I've just rebooted my home workstation because of this issue (~6 days
> uptime), and my servers (~2.5 days uptime) already started generating
> uncollected zombies (640 zombies on one server, 160 on another), so I
> expect I should reboot them in about 10-12 hours.
> 
> Rebooting servers every 2-3 days in unacceptable! I need instructions
> how to help you debug and fix this issue.

Hi Alex, after checking the code, I currently cannot say that or how
runit could fail reaping zombies that detached and re-parented to pid 1.
On Linux running strace on pid 1 isn't supported AFAIK.  To be sure that
runit is at fault, can you please check the kernel versions on your two
machines, can it be that they have changed at the time the problem
popped up?  Does upgrading the Linux kernel to a more recent version
change anything?

Thanks, Gerrit.