O Apache não irá reiniciar

Question

Quando eu tento sudo service apache2 restart está mostrando este erro:

 * Restarting web server apache2 
Segmentation fault
Action 'start' failed.
The Apache error log may have more information.
[fail]
 * The apache2 instance did not start within 20 seconds. Please read the log files to discover problems

Não encontrei nenhum erro em /var/log/apache2/error.log .

Erro de hora atual não exibido.

arquivo error.log:

[Fri Jan 20 01:34:47.349746 2017] [mpm_event:notice] [pid 1738:tid 139655824541568] AH00489: Apache/2.4.7 (Ubuntu) configured -- resuming normal operations
[Fri Jan 20 01:34:47.367221 2017] [core:notice] [pid 1738:tid 139655824541568] AH00094: Command line: '/usr/sbin/apache2'
[Fri Jan 20 02:25:55.502661 2017] [mpm_event:notice] [pid 1738:tid 139655824541568] AH00491: caught SIGTERM, shutting down
[Fri Jan 20 02:25:56.577239 2017] [mpm_prefork:notice] [pid 9844] AH00163: Apache/2.4.7 (Ubuntu) configured -- resuming normal operations
[Fri Jan 20 02:25:56.577329 2017] [core:notice] [pid 9844] AH00094: Command line: '/usr/sbin/apache2'
[Fri Jan 20 02:25:57.814468 2017] [mpm_prefork:notice] [pid 9844] AH00169: caught SIGTERM, shutting down
[Fri Jan 20 02:25:58.913041 2017] [mpm_prefork:notice] [pid 9930] AH00163: Apache/2.4.7 (Ubuntu) configured -- resuming normal operations
[Fri Jan 20 02:25:58.913105 2017] [core:notice] [pid 9930] AH00094: Command line: '/usr/sbin/apache2'
[Fri Jan 20 03:00:52.520885 2017] [mpm_prefork:notice] [pid 9930] AH00169: caught SIGTERM, shutting down