Hi Yann,
thanks for Your support. Your suggestion to comment(remove) the Mutex directive
from /etc/apache2/apache2.conf solved the problem here.
No warning/emergency errors anymore. :)
Output of "apache2ctl -t -D DUMP_RUN_CFG" is now:
Mutex default: dir="/var/run/apache2/" mechanism=default
> >> > Mutex file:${APACHE_LOCK_DIR} default
> >>
> >> Does it come from Ubuntu?
> >> If so, I don't any modern Linux should configure the "file" mutex
> >> mechanism by default, and you could possibly report it...
Is reported here:
https://bugs.launchpad.net/ubuntu/+source/apache2/+bug/1565744
> > I just checked what is the active Mutex:
> >
> > #apache2ctl -t -D DUMP_RUN_CFG
> > ServerRoot: "/etc/apache2"
> > Main DocumentRoot: "/var/www"
> > Main ErrorLog: "/var/log/apache2/error.log"
> > Mutex watchdog-callback: using_defaults
> > Mutex rewrite-map: using_defaults
> > Mutex ssl-stapling: using_defaults
> > Mutex proxy: using_defaults
> > Mutex ssl-cache: using_defaults
> > Mutex default: dir="/var/lock/apache2" mechanism=fcntl
>
> That's when you configure "Mutex fcntl:/var/lock/apache2" right, not
> by default (no Mutex)?
That's the output having the default Ubuntu 14 configuration directive "Mutex
file:${APACHE_LOCK_DIR} default"
Best regards
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