php5-fpm reload kills master process without its children

[Oliver Mueller]

php-fpm uses a master process to control its children. the problem is, that a service reload is going to kill this master process without recovering it or killing its children.

here is an example:

# ps aux|grep fpm
root 20590 1.3 0.0 190264 22380 ? Ss 14:54 0:00 php-fpm: master process (/etc/php5/fpm/php-fpm.conf)
www-data 20592 0.0 0.0 190264 14456 ? S 14:54 0:00 php-fpm: pool www
www-data 20593 0.0 0.0 190264 14456 ? S 14:54 0:00 php-fpm: pool www
www-data 20594 0.0 0.0 190264 14456 ? S 14:54 0:00 php-fpm: pool www
www-data 20595 0.0 0.0 190264 14456 ? S 14:54 0:00 php-fpm: pool www
root 20597 0.0 0.0 118224 948 pts/2 S+ 14:54 0:00 grep --color=auto fpm

FPM is running, but if I do a reload now, the master will disappear

# service php5-fpm reload
# ps aux|grep fpm
www-data 22316 0.0 0.0 190264 14456 ? S 14:57 0:00 php-fpm: pool www
www-data 22317 0.0 0.0 190264 14456 ? S 14:57 0:00 php-fpm: pool www
www-data 22318 0.0 0.0 190264 14456 ? S 14:57 0:00 php-fpm: pool www
www-data 22319 0.0 0.0 190264 14456 ? S 14:57 0:00 php-fpm: pool www
root 22418 0.0 0.0 118224 948 pts/2 S+ 14:59 0:00 grep --color=auto fpm

when this happens, there is basically no easy way of reloading or restarting or stopping this service again, because even a restart cannot find them anymore:

# service php5-fpm restart
stop: Unknown instance:
php5-fpm start/running, process 23494
root@davy ~ # ps aux|grep fpm
www-data 22316 0.0 0.0 190264 14456 ? S 14:57 0:00 php-fpm: pool www
www-data 22317 0.0 0.0 190264 14456 ? S 14:57 0:00 php-fpm: pool www
www-data 22318 0.0 0.0 190264 14456 ? S 14:57 0:00 php-fpm: pool www
www-data 22319 0.0 0.0 190264 14456 ? S 14:57 0:00 php-fpm: pool www
root 23949 0.0 0.0 118224 948 pts/2 S+ 15:00 0:00 grep --color=auto fpm

the master service is still gone.

if i use a restart or stop/start only, everything seems to work find. The bug seems to be in reload functionality only.

# lsb_release -rd
Description: Ubuntu 13.10
Release: 13.10

# apt-cache policy php5-fpm
php5-fpm:
  Installed: 5.5.3+dfsg-1ubuntu2.1
  Candidate: 5.5.3+dfsg-1ubuntu2.1
  Version table:
 *** 5.5.3+dfsg-1ubuntu2.1 0
        500 http://mirror.hetzner.de/ubuntu/packages/ saucy-updates/universe amd64 Packages
        500 http://mirror.hetzner.de/ubuntu/security/ saucy-security/universe amd64 Packages
        500 http://de.archive.ubuntu.com/ubuntu/ saucy-updates/universe amd64 Packages
        500 http://security.ubuntu.com/ubuntu/ saucy-security/universe amd64 Packages
        100 /var/lib/dpkg/status
     5.5.3+dfsg-1ubuntu2 0
        500 http://mirror.hetzner.de/ubuntu/packages/ saucy/universe amd64 Packages
        500 http://de.archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages

[Robie Basak (racb)]

Thank you for taking the time to report this bug and helping to make Ubuntu better.

This sounds like bug 1242376 to me, so I'm marking it as a duplicate. Please comment if this is wrong.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.