unsubscribe On Fri, 13 Jan 2023 at 16:46, Saux, Stephane <ss...@sfchronicle.com.invalid> wrote:
> I have a system that uses a web server (Apache) to allow non-technical > users to start long-running jobs on our systems using a browser. The system > starts the job and returns info that allows the browser to poll a JSON file > that the long-running job maintains to give the user status info about the > job (simplified description.) > > > > But I determined that if Apache restarts on that server, it kills that > process. I had done this about 10 years ago and it worked without doing > this. > > > > I tried to detach the process by forking, and I also tried to have catch > SIGTERM. As a result, Apache restart takes over a minute because something > in the server (or apachctl I’m not sure) tries a number of time to send > that process a SIGTERM (which it ignores) and then just sends it a SIGKILL. > > > > Here’s what syslog shows: > > > > Jan 13 04:09:57 wcmdev systemd[1]: apache2.service: State > 'stop-final-sigterm' timed out. Killing. > > Jan 13 04:09:57 wcmdev systemd[1]: apache2.service: Killing process 113975 > (php) with signal SIGKILL. > > Jan 13 04:09:57 wcmdev systemd[1]: apache2.service: Failed with result > 'timeout'. > > Jan 13 04:09:57 wcmdev systemd[1]: Stopped The Apache HTTP Server. > > Jan 13 04:09:57 wcmdev systemd[1]: apache2.service: Found left-over > process 113975 (php) in control group while starting unit. Ignoring. > > Jan 13 04:09:57 wcmdev systemd[1]: This usually indicates unclean > termination of a previous run, or service implementation deficiencies. > > Jan 13 04:09:57 wcmdev systemd[1]: Starting The Apache HTTP Server... > > > > Here’s what the long running process looks like. Note that the PPID is 1, > so it is detached. > > > > root@wcmdev:/var/www/wcm# ps -f -p 110733 > > UID PID PPID C STIME TTY TIME CMD > > www-data 110733 1 0 02:58 ? 00:00:00 php > /media/sf_Shared/wcm/src/business/api/system/../../../jobs/daemon/testDaemon.php > --id=3852114 > > > > > > I search the list for stop-final-sigterm, and could not find anything. > > > > root@wcmdev:/var/www/wcm# /usr/sbin/apache2 -v > > Server version: Apache/2.4.41 (Ubuntu) > > Server built: 2020-08-12T19:46:17 > > root@wcmdev:/var/www/wcm# uname -a > > Linux wcmdev 5.4.0-48-generic #52-Ubuntu SMP Thu Sep 10 10:58:49 UTC 2020 > x86_64 x86_64 x86_64 GNU/Linux > > >