Re: runit not collecting zombies

[Alex Efros <powerman@powerman.asdfGroup.com>]

Hi!

On Fri, May 25, 2007 at 01:07:42AM +0200, Radek Podgorny wrote:
> I'm experiancing a weird behaviour where runit (1.5.0) does not collect 
> zombies. AFAIK the init (pid=1) process should take care of these and 
> make them quit "correctly". I know that when zombies show up, the 
> initiating application is to blame but in the real world, I need a 
> stable server where I don't run out of PIDs after just few hours :-(.

I've just got same issue. This is first time I see runit does not collect
zombies. Server uptime is 28 days, runit 1.5.0 (upgraded from 1.4.1 at
21 Apr). Server generate huge amount of short-living processes, so maybe
some integer overflow in runit or something similar result in this issue.

Right now I've 8114 zombies and user which run all these scripts now
unable to start new processes:
    bash: fork: Resource temporarily unavailable

Looks like I've to reboot to fix this issue for some time. :-(

I've no idea how to provide more information, strace won't working:
    # strace -p 1
    attach: ptrace(PTRACE_ATTACH, ...): Operation not permitted
So only I can provide is partial `ps axf` output:


  PID TTY      STAT   TIME COMMAND
    1 ?        T      2:59 runit
    2 ?        SN     0:00 [ksoftirqd/0]
    3 ?        S<     0:00 [events/0]
    4 ?        S<     0:00 [khelper]
    5 ?        S<     0:00 [kthread]
    7 ?        S<     0:34  \_ [kblockd/0]
   61 ?        S<     0:00  \_ [aio/0]
  132 ?        S<     0:00  \_ [kseriod]
  161 ?        S<     0:00  \_ [kpsmoused]
  174 ?        S<     0:01  \_ [reiserfs/0]
16498 ?        S      0:08  \_ [pdflush]
26144 ?        S      0:03  \_ [pdflush]
   60 ?        S      1:53 [kswapd0]
 1091 ?        Ss     0:00 /bin/sh /etc/runit/2
24888 ?        S      0:00  \_ runsvdir /var/service log: ......................
...
17454 ?        ZN     0:00 [SpiderAuto] <defunct>
 5187 ?        ZN     0:00 [SpiderAuto] <defunct>
22364 ?        ZN     0:00 [SpiderAuto] <defunct>
18907 ?        ZN     0:00 [SpiderAuto] <defunct>
...

-- 
			WBR, Alex.