Debian + Exec-Program = Zombie process

[George Chelidze]

Bjørn Mork wrote:
> George Chelidze <wrath at geo.net.ge> writes:
> 
> 
>>as soon as I send accounting stop packet to radius, test.pl executes and 
>>becomes a zombie. (I tried bash script, c program with the same result.)
>>
>> 3890 ?        Ss     0:00 /usr/local/freeradius/sbin/radiusd
>> 3893 ?        Z      0:00  \_ [test.pl] <defunct>
>>
>>As far as I know, this should have been fixed in 1.0.3 and I doubt it's 
>>debian specific, as I know 0.93 works on another RH 7.3 without a 
>>problem (In fact zombie is listed there as well but disappears after 
>>several seconds).
>>
>>Any ideas/suggestions?
> 
> 
> Is it replaced by a new zombie the next time you send an accounting
> packet, or do the zombies add up?

Zombies add up even when I recompile without --without-threads option.

> The way I read rad_fork(), it will call reap_children() every time it
> is called.  But there's not necessarily anything calling
> reap_children() inbetween. This means that zombies will only live
> forever on servers without traffic.
> 
> You should probably read the comment in front of reap_children() in
> src/main/threads.c.  I believe it explains why this design was chosen.

If I understood things correctly, if I compile radius without threads 
support reap_children() won't be called and zombies will add up? I am 
not against compiling it with threads support, but unfortunately I get 
something like this:

18439 ?        Ss     0:00 /usr/local/freeradius/sbin/radiusd
18440 ?        S      0:00  \_ /usr/local/freeradius/sbin/radiusd
18441 ?        S      0:00      \_ /usr/local/freeradius/sbin/radiusd
18460 ?        Z      0:00      |   \_ [test.pl] <defunct>
18492 ?        Z      0:00      |   \_ [test.pl] <defunct>
18442 ?        S      0:00      \_ /usr/local/freeradius/sbin/radiusd
18480 ?        Z      0:00      |   \_ [test.pl] <defunct>
18443 ?        S      0:00      \_ /usr/local/freeradius/sbin/radiusd
18483 ?        Z      0:00      |   \_ [test.pl] <defunct>
18444 ?        S      0:00      \_ /usr/local/freeradius/sbin/radiusd
18486 ?        Z      0:00      |   \_ [test.pl] <defunct>
18445 ?        S      0:00      \_ /usr/local/freeradius/sbin/radiusd
18489 ?        Z      0:00          \_ [test.pl] <defunct>

> 
> Bjørn
> 

Thanks a lot for your reply