On 13 May 2010 19:37, Davo <[email protected]> wrote: > Hello Graham, > > I tracked that as well to see if it is actually a zombie process or > not
Sorry, isn't a zombie process then. Been too busy today to look at these emails properly. :-) I'll look again later when have time, maybe tomorrow or weekend though. Graham > See the following (ps -fH -u davo) > > === Request to the WSGI is still running (timeout of 30 seconds not > reached yet) ====== > UID PID PPID C STIME TTY TIME CMD > davo 2844 2834 0 11:29 ? 00:00:00 > (wsgi:davo.com) -k start > davo 3443 2844 0 11:34 ? 00:00:00 watch -n 5 echo aaa > > > === the request returned 500 error (normal timeout of 30 seconds...) > === > UID PID PPID C STIME TTY TIME CMD > davo 3468 2834 4 11:35 ? 00:00:00 > (wsgi:davo.com) -k start > davo 3443 1 0 11:34 ? 00:00:00 watch -n 5 echo aaa > > as you can see process PPID becomes 1, > hence it is now its own process. even if I stop apache it doesnt > change anything. > > # apachectl stop > # ps -fH -u davo > davo 3443 1 0 11:34 ? 00:00:00 watch -n 5 echo aaa > > > > > On May 13, 2:24 am, Graham Dumpleton <[email protected]> > wrote: >> On 13 May 2010 02:01, Davo <[email protected]> wrote: >> >> > Hi all, >> >> > If I have a WSGI running as daemon mode and my python code is: >> >> > p = subprocess.Popen(['watch -n 5 echo "aaa"'], >> > stdout=subprocess.PIPE, stderr=subprocess.STDOUT, >> > shell=True).communicate()[0].strip('\n') >> >> > The "watch" goes background and never ends. Even when I kill the wsgi >> > daemon it still exists and changes its PPID (parent ID) to 1 (which >> > means its becomes its own process instead of a child of any parent...) >> > is there a way to prevent this? Cleanup all the childs or something >> > when the daemon is restarted? >> >> That process is what is called a zombie process. See: >> >> http://en.wikipedia.org/wiki/Zombie_process >> >> It doesn't consume any actual resources and is merely an entry in the >> operating systems process table which will exist until the process has >> been waited upon to get its exit status. The operating system should >> eventually forcibly reap process if parent doesn't. >> >> Graham >> >> -- >> You received this message because you are subscribed to the Google Groups >> "modwsgi" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group >> athttp://groups.google.com/group/modwsgi?hl=en. > > -- > You received this message because you are subscribed to the Google Groups > "modwsgi" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/modwsgi?hl=en. > > -- You received this message because you are subscribed to the Google Groups "modwsgi" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/modwsgi?hl=en.
