[smokeping-users] [smokeping] FastCGI orphaned process issue, fix

[Tobias Oetiker]

Hi Eric,

Thursday Eric Searcy wrote:

> I discovered on my system (Smokeping 2.6.8, RHEL6, Apache 2.2, mod_fcgid
> 2.3.7) that Smokeping CGI procs became orphaned on both Apache restarts
> and graceful/reloads.
>
>  2506 ?        Ss     0:32 /usr/sbin/httpd.worker
> 25417 ?        S      0:00  \_ /usr/sbin/httpd.worker
> 25530 ?        S      0:00  |   \_ /bin/sh
> /opt/smokeping-2.6.8/htdocs/smokeping.fcgi
> 25531 ?        S      0:01  |       \_ /usr/bin/perl
> /opt/smokeping-2.6.8/bin/smokeping_cgi /opt/smokeping-2.6.8/etc/config
> 25418 ?        Sl     0:00  \_ /usr/sbin/httpd.worker
> 25419 ?        Sl     0:00  \_ /usr/sbin/httpd.worker
> 25420 ?        Sl     0:00  \_ /usr/sbin/httpd.worker
>  2658 ?        S      0:02 /usr/bin/perl
> /opt/smokeping-2.6.8/bin/smokeping_cgi /opt/smokeping-2.6.8/etc/config
>  5979 ?        S      0:04 /usr/bin/perl
> /opt/smokeping-2.6.8/bin/smokeping_cgi /opt/smokeping-2.6.8/etc/config
> 10350 ?        S      0:02 /usr/bin/perl
> /opt/smokeping-2.6.8/bin/smokeping_cgi /opt/smokeping-2.6.8/etc/config
> [...]
>
> Connecting strace shows that FastCGI sends a TERM signal to the
> smokeping.fcgi process (25530 above) but it's child 25531 doesn't get
> any signal and joins the growing list of orphans.  (and no, not caused
> by SELinux.)
>
> Fix: changing smokeping.fcgi from the .dist ...
>
> #!/bin/sh
> /opt/smokeping-2.6.8/bin/smokeping_cgi /opt/smokeping-2.6.8/etc/config
>
> to:
>
> #!/bin/sh
> exec /opt/smokeping-2.6.8/bin/smokeping_cgi /opt/smokeping-2.6.8/etc/config
>
> ... resolves the problem for me.  I suspect the "exec" should work in
> all cases (regular CGI too).
>
> Anybody else see this behavior?

makes sense ... fixed in trunk

cheers
tobi

>
> Eric
>
>

-- 
Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland
http://it.oetiker.ch tobi at oetiker.ch ++41 62 775 9902 / sb: -9900