systemd[1]: Failed to start LSB: Apache2 web server

Question

I have an Apache Web (version 2.4.10) server running on Debian 8 (Jessie). It is mainly used as a SVN repository server. It was working well since a few weeks, and suddenly, I got an internal error when attempting to list the SVN repos from a Web Browser as can be seen below:

Apache Internal Error & Authentication

As you can see, authentication is still working fine.

I ran the 2 following commands: systemctl status apache2.service and journalctl -xn

commands

But that doesn't help me much, maybe I'm missing something? I did NOT modify any configuration file recently related to Apache (or even anything else for that matter): neither the main apache conf file nor any vHost conf file. I tried restarting Apache, it does restart but the Web Server still encounters an internal error.

error.log:

[Sun Jan 31 18:36:17.372502 2016] [core:notice] [pid 27449:tid 140087289513856] AH00094: Command line: '/usr/sbin/apache2'
[Sun Jan 31 18:37:07.641329 2016] [mpm_event:notice] [pid 27449:tid 140087289513856] AH00491: caught SIGTERM, shutting down
[Sun Jan 31 18:38:31.156131 2016] [wsgi:warn] [pid 1049:tid 140557851056000] mod_wsgi: Compiled for Python/2.7.8.
[Sun Jan 31 18:38:31.156330 2016] [wsgi:warn] [pid 1049:tid 140557851056000] mod_wsgi: Runtime using Python/2.7.9.

[Sun Jan 31 18:38:31.157222 2016] [mpm_event:notice] [pid 1049:tid 140557851056000] AH00489: Apache/2.4.10 (Debian) SVN/1.8.10 OpenSSL/1.0.1k mod_wsgi/4.3.0 Python/2.7.9 configured -- resuming normal operations

[Sun Jan 31 18:38:31.157241 2016] [core:notice] [pid 1049:tid 140557851056000] AH00094: Command line: '/usr/sbin/apache2'

[Sun Jan 31 19:21:39.401930 2016] [mpm_event:notice] [pid 1049:tid 140557851056000] AH00491: caught SIGTERM, shutting down

[Sun Jan 31 19:22:35.038612 2016] [wsgi:warn] [pid 1313:tid 139813423814528] mod_wsgi: Compiled for Python/2.7.8.

[Sun Jan 31 19:22:35.038672 2016] [wsgi:warn] [pid 1313:tid 139813423814528] mod_wsgi: Runtime using Python/2.7.9.

[Sun Jan 31 19:22:35.039592 2016] [mpm_event:notice] [pid 1313:tid 139813423814528] AH00489: Apache/2.4.10 (Debian) SVN/1.8.10 OpenSSL/1.0.1k mod_wsgi/4.3.0 Python/2.7.9 configured -- resuming normal operations

[Sun Jan 31 19:22:35.039611 2016] [core:notice] [pid 1313:tid 139813423814528] AH00094: Command line: '/usr/sbin/apache2'

[Sun Jan 31 19:24:57.303622 2016] [mpm_event:notice] [pid 1313:tid 139813423814528] AH00491: caught SIGTERM, shutting down

[Sun Jan 31 19:26:20.336578 2016] [wsgi:warn] [pid 1050:tid 140178825381760] mod_wsgi: Compiled for Python/2.7.8.

[Sun Jan 31 19:26:20.336805 2016] [wsgi:warn] [pid 1050:tid 140178825381760] mod_wsgi: Runtime using Python/2.7.9.

[Sun Jan 31 19:26:20.337601 2016] [mpm_event:notice] [pid 1050:tid 140178825381760] AH00489: Apache/2.4.10 (Debian) SVN/1.8.10 OpenSSL/1.0.1k mod_wsgi/4.3.0 Python/2.7.9 configured -- resuming normal operations

[Sun Jan 31 19:26:20.337617 2016] [core:notice] [pid 1050:tid 140178825381760] AH00094: Command line: '/usr/sbin/apache2'

[Sun Jan 31 19:31:24.663351 2016] [mpm_event:notice] [pid 1050:tid 140178825381760] AH00491: caught SIGTERM, shutting down

[Sun Jan 31 19:31:25.827873 2016] [wsgi:warn] [pid 1208:tid 139958437914496] mod_wsgi: Compiled for Python/2.7.8.

[Sun Jan 31 19:31:25.827919 2016] [wsgi:warn] [pid 1208:tid 139958437914496] mod_wsgi: Runtime using Python/2.7.9.

[Sun Jan 31 19:31:25.828655 2016] [mpm_event:notice] [pid 1208:tid 139958437914496] AH00489: Apache/2.4.10 (Debian) SVN/1.8.10 OpenSSL/1.0.1k mod_wsgi/4.3.0 Python/2.7.9 configured -- resuming normal operations

[Sun Jan 31 19:31:25.828679 2016] [core:notice] [pid 1208:tid 139958437914496] AH00094: Command line: '/usr/sbin/apache2'

Could that come from the Python version that mod_wsgi is running which differs from what mod_wsgi is apparently expecting?

Answer 1

try two commands blow:

sudo apt-get purge apache2 

sudo apt-get install apache2

after that use systemctl status apache2 to check you apache's status

Answer 2

These commands solved my problem:

sudo apt-get remove apache2 

sudo apt-get install apache2

Note: if you use purge as another answer, you should set all Apache config again, But when you use remove it just removes core of Apache and after installing you don't need anything more.