Welcome! Log In Create A New Profile

Advanced

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Maxim Dounin
November 24, 2017 08:00AM
Hello!

On Fri, Nov 24, 2017 at 12:16:08PM +0300, Vadim A. Misbakh-Soloviov wrote:

> Прошу прощения за то, что вставляю свои пять копеек, но у меня, почему-то, на
> Gentoo NgX вполне замечательно стартует на SystemD без ругани, на которую
> жалуется ОП:

[...]

> В связи с этим у меня возникает вопрос: а что я, собственно, делаю не так?

Там race:

- запущенный процесс делает fork() и выходит;

- потомок делает setsid(), umask(), перенаправляет stdin/stdout в
/dev/null, и уже после этого создаёт pid-файл.

Соответственно systemd может успеть попытаться прочитать pid-файл
до того, как он создан. Успеет или нет - зависит от количества
процессоров и поведения шедулера.

У меня получается воспроизвести проблему на виртуалке с Ubuntu
после того, как я оставил в ней только один процессор. Где-то раз
в 3-5 запусков он успевает.

--
Maxim Dounin
http://mdounin.ru/
_______________________________________________
nginx-ru mailing list
nginx-ru@nginx.org
http://mailman.nginx.org/mailman/listinfo/nginx-ru
Subject Author Posted

systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Gena Makhomed November 21, 2017 03:48PM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Maxim Dounin November 22, 2017 12:44PM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Gena Makhomed November 23, 2017 08:52AM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Maxim Dounin November 23, 2017 10:40AM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Gena Makhomed November 23, 2017 11:30AM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Igor Sysoev November 23, 2017 11:46AM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Maxim Dounin November 23, 2017 12:18PM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Gena Makhomed November 23, 2017 12:34PM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Maxim Dounin November 23, 2017 12:14PM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Gena Makhomed November 23, 2017 02:02PM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Maxim Dounin November 23, 2017 04:02PM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Gena Makhomed November 23, 2017 06:14PM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Maxim Dounin November 23, 2017 11:14PM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Evgeniy Berdnikov November 24, 2017 03:08AM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Vadim A. Misbakh-Soloviov November 24, 2017 04:18AM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Maxim Dounin November 24, 2017 08:00AM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Gena Makhomed November 24, 2017 06:32AM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Vadim A. Misbakh-Soloviov November 24, 2017 06:38AM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Konstantin Tokarev November 24, 2017 06:46AM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Pavel V. November 24, 2017 07:00AM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Maxim Dounin November 24, 2017 08:36AM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Gena Makhomed November 24, 2017 09:50AM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Vadim A. Misbakh-Soloviov November 24, 2017 10:14AM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Maxim Dounin November 24, 2017 02:46PM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Gena Makhomed November 25, 2017 09:24AM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Slawa Olhovchenkov November 25, 2017 09:38AM

Re:systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Konstantin Tokarev November 25, 2017 08:48PM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

S.A.N November 23, 2017 12:30PM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Gena Makhomed November 23, 2017 12:56PM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Maxim Dounin November 23, 2017 12:58PM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Илья Шипицин November 23, 2017 01:32PM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Konstantin Pavlov November 23, 2017 03:08PM

Re: systemd: PID file /var/run/nginx.pid not readable (yet?) after start.

Evgeniy Berdnikov November 23, 2017 02:06PM



Sorry, only registered users may post in this forum.

Click here to login

Online Users

Guests: 44
Record Number of Users: 6 on February 13, 2018
Record Number of Guests: 421 on December 02, 2018
Powered by nginx      Powered by FreeBSD      PHP Powered      Powered by MariaDB      ipv6 ready