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Re: Killing a zombie process?

On Thu, 24 Sep 2015, Greg Troxel wrote:

Paul Goyette <> writes:

On Thu, 24 Sep 2015, Gary Duzan wrote:
Yup, my zombie's parent PPID==1

  If init is really its parent, check its "ps axl" output and
check its WCHAN. If it isn't "wait", maybe run "ktruss -p 1" to
get an idea of what it is doing instead of wait*() calls.

See ps output above;  init's WCHAN==wait

So no clue on why it's not getting around to reaping child 27237.

I would try sending init a HUP, which should rescan /etc/ttys and not
really do anything.  But it will then call wait(2) again, and if there
was a glitch where init was already in wait and the offending process's
transition to zombie and ppid==1 didn't cause a wakeup, then it may

No luck...  I HUPed init, but the zombie is still there.

# kill -HUP 1
# ps axl | grep ' Z '
   0 27237     1     0   0  0       0      0 -       Z    pts/2- 0:00.00 (sh)

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