Multi pids on host for one container

Hi Guys,

I have noticed for some time now that my containers create 10, 20, 40 times & more the same command for one container.

Is that normal behavior or am I missing something ?

example :

|-- docker-containerd-shim

|--|-- /bin/bash /dwl/init.sh
|--|--|-- tail -f /dev/null

|--|--|-- /usr/sbin/apache2 -k start
|--|--|--|-- /usr/sbin/apache2 -k start
|--|--|--|-- /usr/sbin/apache2 -k start
            [same command x10,20 or more]
|--|--|--|-- /usr/sbin/apache2 -k start
|--|--|--|-- /usr/sbin/apache2 -k start

|--|--|-- /usr/sbin/apache2 -k start
|--|--|--|-- /usr/sbin/apache2 -k start
|--|--|--|-- /usr/sbin/apache2 -k start
            [same command x10,20 or more]
|--|--|--|-- /usr/sbin/apache2 -k start
|--|--|--|-- /usr/sbin/apache2 -k start

server details :

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=16.04
DISTRIB_CODENAME=xenial
DISTRIB_DESCRIPTION=“Ubuntu 16.04.1 LTS”

Docker version 17.03.0-ce, build 3a232c8