[SR-Users] Kill child process created by app_python module

[Daniel-Constantin Mierla]

Hello,

not sure I got right what is the issue and what would be a solution for
it, but maybe you can leverage evrexec to create a child process and by
that keep it in kamailio children list.

Cheers,
Daniel

On 13.09.22 19:15, Marat Gareev wrote:
> Hello!
>
> I'm trying to use app_python module to perform periodic actions.
>
> This is a simple python code
> def _update():
> while True:
> _action()
> time.sleep(60)
> class noop_handler:
> def child_init(self, rank):
> return 0
> def ksr_request_route(self, msg):
> return 1
> def mod_init():
> # signal.signal(signal.SIGTERM, signal.default_int_handler)
> proc = multiprocessing.Process(target=_update)
> # proc.daemon = True
> proc.start()
> ksr.notice('Forked process {}to update\n'.format(proc.pid))
> return noop_handler()
>
> After killing kamailio processes with SIGTERM signal (killall
> kamailio) I see zombie process.
> And if I try to process the signal in daemon mode (see the comments in
> the snippet above), I get critical errors in the logs and still see
> processes:
> 0(37001) NOTICE: <core> [core/kemi.c:124]: sr_kemi_core_notice():
> Forked process 37002 to update
> 1(37003) ERROR: <core> [core/udp_server.c:464]: udp_rcv_loop():
> recvfrom:[4] Interrupted system call
> Process Process-1:
> Traceback (most recent call last):
> File "/usr/lib64/python2.7/multiprocessing/process.py", line 258, in
> _bootstrap
> self.run()
> File "/usr/lib64/python2.7/multiprocessing/process.py", line 114, in run
> self._target(*self._args, **self._kwargs)
> File "/tmp/script.py", line 155, in _update
> time.sleep(period)
> KeyboardInterrupt
> 0(37001) ALERT: <core> [main.c:774]: handle_sigs(): child process
> 37002 exited normally, status=1
> 0(37001) INFO: <core> [main.c:802]: handle_sigs(): terminating due to
> SIGCHLD
> 1(37003) ERROR: <core> [core/udp_server.c:464]: udp_rcv_loop():
> recvfrom:[4] Interrupted system call
> 8(37014) CRITICAL: <core> [core/pass_fd.c:277]: receive_fd(): EOF on 4
> 1(37003) ERROR: <core> [core/udp_server.c:464]: udp_rcv_loop():
> recvfrom:[4] Interrupted system call
>
> So, how I can kill child process by SIGTERM signal?
>
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-- 
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda
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