O Ubuntu 16.04 está sendo executado no modo degradado

Question

Atualizei recentemente de 14.04 a 16.04. Eu tenho o apache2 no meu servidor, mas recentemente notei isso:

fmf@kodi:~$ systemctl is-system-running
degraded
fmf@kodi:~$

Então eu cavo um pouco:

fmf@kodi:~$ systemctl --state=failed
  UNIT            LOAD   ACTIVE SUB    DESCRIPTION
● apache2.service loaded failed failed LSB: Apache2 web server

LOAD   = Reflects whether the unit definition was properly loaded.
ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
SUB    = The low-level unit activation state, values depend on unit type.

1 loaded units listed. Pass --all to see loaded but inactive units, too.
To show all installed unit files use 'systemctl list-unit-files'.
fmf@kodi:~$

Então, um pouco mais de escavação:

fmf@kodi:~$ systemctl status -l apache2.service
● apache2.service - LSB: Apache2 web server
   Loaded: loaded (/etc/init.d/apache2; bad; vendor preset: enabled)
  Drop-In: /lib/systemd/system/apache2.service.d
           └─apache2-systemd.conf
   Active: failed (Result: exit-code) since Wed 2016-08-03 14:57:11 CEST; 7min ago
     Docs: man:systemd-sysv-generator(8)
  Process: 3120 ExecStart=/etc/init.d/apache2 start (code=exited, status=1/FAILURE)
   CGroup: /system.slice/apache2.service
           ├─3476 /usr/sbin/apache2 -k start
           ├─3479 /usr/sbin/apache2 -k start
           ├─3941 /usr/sbin/apache2 -k start
           ├─3942 /usr/sbin/apache2 -k start
           ├─3943 /usr/sbin/apache2 -k start
           ├─3944 /usr/sbin/apache2 -k start
           ├─3945 /usr/sbin/apache2 -k start
           ├─3965 /usr/sbin/apache2 -k start
           ├─3984 /usr/sbin/apache2 -k start
           └─3985 /usr/sbin/apache2 -k start

Aug 03 14:56:38 kodi systemd[1]: Starting LSB: Apache2 web server...
Aug 03 14:56:38 kodi apache2[3120]:  * Starting Apache httpd web server apache2
Aug 03 14:57:11 kodi apache2[3120]:  *
Aug 03 14:57:11 kodi apache2[3120]:  * The apache2 instance did not start within 20 seconds. Please read the log files to discover problems
Aug 03 14:57:11 kodi systemd[1]: apache2.service: Control process exited, code=exited status=1
Aug 03 14:57:11 kodi systemd[1]: Failed to start LSB: Apache2 web server.
Aug 03 14:57:11 kodi systemd[1]: apache2.service: Unit entered failed state.
Aug 03 14:57:11 kodi systemd[1]: apache2.service: Failed with result 'exit-code'.
fmf@kodi:~$

O mais estranho é que, se eu tento me conectar à página da web no meu servidor, posso vê-lo. Onde esse erro vem? Tentei verificar os logs do apache2, mas não consigo encontrar nada de estranho nele.

Talvez isso ajude:

fmf@kodi:~$ netstat -antp | grep 80
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
tcp        0      0 0.0.0.0:8080            0.0.0.0:*               LISTEN      3929/kodi.bin
tcp        0      1 192.168.254.8:47306     144.76.30.184:80        SYN_SENT    3929/kodi.bin
tcp        0    160 192.168.254.8:46574     144.76.30.184:80        ESTABLISHED 3929/kodi.bin
tcp        0    156 192.168.254.8:46836     144.76.30.184:80        ESTABLISHED 3929/kodi.bin
tcp        0    165 192.168.254.8:47268     144.76.30.184:80        ESTABLISHED 3929/kodi.bin
tcp        0    166 192.168.254.8:47232     144.76.30.184:80        FIN_WAIT1   -
tcp        0    165 192.168.254.8:47112     144.76.30.184:80        ESTABLISHED 3929/kodi.bin
tcp        0      1 192.168.254.8:47304     144.76.30.184:80        SYN_SENT    3929/kodi.bin
tcp        0      1 192.168.254.8:47302     144.76.30.184:80        SYN_SENT    3929/kodi.bin
tcp        1      0 192.168.254.8:38502     104.20.56.43:80         CLOSE_WAIT  3176/python
tcp        0      1 192.168.254.8:47292     144.76.30.184:80        SYN_SENT    3929/kodi.bin
tcp        0    166 192.168.254.8:47252     144.76.30.184:80        FIN_WAIT1   -
tcp        0      1 192.168.254.8:47294     144.76.30.184:80        SYN_SENT    3929/kodi.bin
tcp6       0      0 :::8080                 :::*                    LISTEN      3929/kodi.bin
tcp6       0      0 :::80                   :::*                    LISTEN      -
tcp6       0      0 192.168.254.8:80        77.108.48.106:61805     TIME_WAIT   -
tcp6       0      0 192.168.254.8:80        77.108.48.106:61851     TIME_WAIT   -
fmf@kodi:~$

Qualquer ajuda, por favor?