title: Centos httpd apache http server fails to start
body: <p>I have open stack running and it was working fine I've rebooted and since have been unable to restart httpd </p>
  
  <pre><code>[root@h30 ~]# systemctl status httpd.service
  ● httpd.service - The Apache HTTP Server
     Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)
    Drop-In: /usr/lib/systemd/system/httpd.service.d
         └─openstack-dashboard.conf
  Active: failed (Result: exit-code) since Thu 2016-09-01 14:11:07 BST; 2min 13s ago
   Docs: man:httpd(8)
         man:apachectl(8)
  Process: 10030 ExecStop=/bin/kill -WINCH ${MAINPID} (code=exited, status=1/FAILURE)
  Process: 10027 ExecStart=/usr/sbin/httpd $OPTIONS -DFOREGROUND (code=exited, status=1/FAILURE)
  Process: 9944 ExecStartPre=/usr/bin/python /usr/share/openstack-dashboard/manage.py compress --force (code=exited, status=0/SUCCESS)
  Process: 9919 ExecStartPre=/usr/bin/python /usr/share/openstack-dashboard/manage.py collectstatic --noinput --clear (code=exited, status=0/SUCCESS)
  Main PID: 10027 (code=exited, status=1/FAILURE)
  
  Sep 01 14:10:46 h30 python[9919]: Copying '/usr/lib/python2.7/site-packages/horizon/static/framework/widgets/help-panel/help...ive.js'
  Sep 01 14:10:46 h30 python[9919]: Copying '/usr/lib/python2.7/site-packages/horizon/static/framework/widgets/help-panel/help...pec.js'
  Sep 01 14:10:46 h30 python[9919]: Copying '/usr/lib/python2.7/site-packages/horizon/static/framework/widgets/help-panel/help...l.html'
  Sep 01 14:10:46 h30 python[9919]: Copying '/usr/lib/python2.7/site-packages/horizon/static/framework/widgets/help-panel/help...ule.js'
  Sep 01 14:10:46 h30 python[9919]: Copying '/usr/lib/python2.7/site-packages/horizon/static/framework/widgets/help-panel/help...pec.js'
  Sep 01 14:11:07 h30 systemd[1]: httpd.service: main process exited, code=exited, status=1/FAILURE
  Sep 01 14:11:07 h30 systemd[1]: httpd.service: control process exited, code=exited status=1
  Sep 01 14:11:07 h30 systemd[1]: Failed to start The Apache HTTP Server.
  Sep 01 14:11:07 h30 systemd[1]: Unit httpd.service entered failed state.
  Sep 01 14:11:07 h30 systemd[1]: httpd.service failed.
  Hint: Some lines were ellipsized, use -l to show in full.
  </code></pre>
  
  <p>and I have no idea whats causing the issue to be honest, any help would be great.</p>
  
  <p>Here is the error log</p>
  
  <pre><code>[Wed Aug 31 17:23:03.796739 2016] [core:notice] [pid 4346] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND'
  [Wed Aug 31 17:23:06.653781 2016] [mpm_prefork:notice] [pid 4346] AH00170: caught SIGWINCH, shutting down gracefully
  [Wed Aug 31 17:23:31.884455 2016] [core:notice] [pid 7547] SELinux policy enabled; httpd running as context system_u:system_r:httpd_t:s0
  [Wed Aug 31 17:23:31.885805 2016] [suexec:notice] [pid 7547] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
  [Wed Aug 31 17:23:31.902192 2016] [so:warn] [pid 7547] AH01574: module php5_module is already loaded, skipping
  [Wed Aug 31 17:23:31.902233 2016] [so:warn] [pid 7547] AH01574: module wsgi_module is already loaded, skipping
  [Wed Aug 31 17:23:31.905613 2016] [auth_digest:notice] [pid 7547] AH01757: generating secret for digest authentication ...
  [Wed Aug 31 17:23:32.100865 2016] [mpm_prefork:notice] [pid 7547] AH00163: Apache/2.4.6 (CentOS) PHP/5.4.16 mod_wsgi/3.4 Python/2.7.5 configured -- resuming normal operations
  [Wed Aug 31 17:23:32.100922 2016] [core:notice] [pid 7547] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND'
  [Wed Aug 31 18:35:11.515126 2016] [mpm_prefork:notice] [pid 7547] AH00170: caught SIGWINCH, shutting down gracefully
  [Wed Aug 31 19:22:27.955740 2016] [core:notice] [pid 17956] SELinux policy enabled; httpd running as context system_u:system_r:httpd_t:s0
  [Wed Aug 31 19:22:27.968206 2016] [suexec:notice] [pid 17956] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
  [Wed Aug 31 19:22:27.984913 2016] [so:warn] [pid 17956] AH01574: module php5_module is already loaded, skipping
  [Wed Aug 31 19:22:27.984949 2016] [so:warn] [pid 17956] AH01574: module wsgi_module is already loaded, skipping
  [Wed Aug 31 19:22:27.988204 2016] [auth_digest:notice] [pid 17956] AH01757: generating secret for digest authentication ...
  [Wed Aug 31 19:22:28.303754 2016] [mpm_prefork:notice] [pid 17956] AH00163: Apache/2.4.6 (CentOS) PHP/5.4.16 mod_wsgi/3.4 Python/2.7.5 configured -- resuming normal operations
  [Wed Aug 31 19:22:28.303816 2016] [core:notice] [pid 17956] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND'
  [Thu Sep 01 09:35:49.397054 2016] [core:notice] [pid 20080] SELinux policy enabled; httpd running as context system_u:system_r:httpd_t:s0
  [Thu Sep 01 09:35:49.399094 2016] [suexec:notice] [pid 20080] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
  [Thu Sep 01 09:35:49.415550 2016] [so:warn] [pid 20080] AH01574: module php5_module is already loaded, skipping
  [Thu Sep 01 09:35:49.415588 2016] [so:warn] [pid 20080] AH01574: module wsgi_module is already loaded, skipping
  [Thu Sep 01 09:35:49.418833 2016] [auth_digest:notice] [pid 20080] AH01757: generating secret for digest authentication ...
  [Thu Sep 01 09:35:49.712957 2016] [mpm_prefork:notice] [pid 20080] AH00163: Apache/2.4.6 (CentOS) PHP/5.4.16 mod_wsgi/3.4 Python/2.7.5 configured -- resuming normal operations
  [Thu Sep 01 09:35:49.713022 2016] [core:notice] [pid 20080] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND'
  [Thu Sep 01 10:19:18.114919 2016] [mpm_prefork:notice] [pid 20080] AH00170: caught SIGWINCH, shutting down gracefully
  [Thu Sep 01 10:22:37.210697 2016] [core:notice] [pid 5401] SELinux policy enabled; httpd running as context system_u:system_r:httpd_t:s0
  [Thu Sep 01 10:22:37.212740 2016] [suexec:notice] [pid 5401] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
  [Thu Sep 01 10:22:37.228616 2016] [so:warn] [pid 5401] AH01574: module php5_module is already loaded, skipping
  [Thu Sep 01 10:22:37.228654 2016] [so:warn] [pid 5401] AH01574: module wsgi_module is already loaded, skipping
  [Thu Sep 01 10:22:37.231944 2016] [auth_digest:notice] [pid 5401] AH01757: generating secret for digest authentication ...
  [Thu Sep 01 10:22:37.522692 2016] [mpm_prefork:notice] [pid 5401] AH00163: Apache/2.4.6 (CentOS) PHP/5.4.16 mod_wsgi/3.4 Python/2.7.5 configured -- resuming normal operations
  [Thu Sep 01 10:22:37.522741 2016] [core:notice] [pid 5401] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND'
  [Thu Sep 01 13:20:14.419086 2016] [mpm_prefork:notice] [pid 5401] AH00170: caught SIGWINCH, shutting down gracefully
  [Thu Sep 01 13:20:48.116596 2016] [core:notice] [pid 41924] SELinux policy enabled; httpd running as context system_u:system_r:httpd_t:s0
  [Thu Sep 01 13:20:48.118260 2016] [suexec:notice] [pid 41924] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
  [Thu Sep 01 13:20:48.133601 2016] [so:warn] [pid 41924] AH01574: module php5_module is already loaded, skipping
  [Thu Sep 01 13:20:48.133632 2016] [so:warn] [pid 41924] AH01574: module wsgi_module is already loaded, skipping
  [Thu Sep 01 13:20:48.136768 2016] [auth_digest:notice] [pid 41924] AH01757: generating secret for digest authentication ...
  [Thu Sep 01 13:20:48.396768 2016] [mpm_prefork:notice] [pid 41924] AH00163: Apache/2.4.6 (CentOS) PHP/5.4.16 mod_wsgi/3.4 Python/2.7.5 configured -- resuming normal operations
  [Thu Sep 01 13:20:48.396822 2016] [core:notice] [pid 41924] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND'
  [Thu Sep 01 13:21:00.502249 2016] [mpm_prefork:notice] [pid 41924] AH00170: caught SIGWINCH, shutting down gracefully
  [Thu Sep 01 13:21:25.497407 2016] [core:notice] [pid 44854] SELinux policy enabled; httpd running as context system_u:system_r:httpd_t:s0
  [Thu Sep 01 13:21:25.498739 2016] [suexec:notice] [pid 44854] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
  [Thu Sep 01 13:21:25.514803 2016] [so:warn] [pid 44854] AH01574: module php5_module is already loaded, skipping
  [Thu Sep 01 13:21:25.514842 2016] [so:warn] [pid 44854] AH01574: module wsgi_module is already loaded, skipping
  [Thu Sep 01 13:21:25.518264 2016] [auth_digest:notice] [pid 44854] AH01757: generating secret for digest authentication ...
  [Thu Sep 01 13:21:25.709404 2016] [mpm_prefork:notice] [pid 44854] AH00163: Apache/2.4.6 (CentOS) PHP/5.4.16 mod_wsgi/3.4 Python/2.7.5 configured -- resuming normal operations
  [Thu Sep 01 13:21:25.709456 2016] [core:notice] [pid 44854] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND'
  [Thu Sep 01 13:27:32.427493 2016] [mpm_prefork:notice] [pid 44854] AH00170: caught SIGWINCH, shutting down gracefully
  [Thu Sep 01 13:30:35.056150 2016] [core:notice] [pid 5096] SELinux policy enabled; httpd running as context system_u:system_r:httpd_t:s0
  [Thu Sep 01 13:30:35.058238 2016] [suexec:notice] [pid 5096] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
  [Thu Sep 01 13:30:35.075005 2016] [so:warn] [pid 5096] AH01574: module php5_module is already loaded, skipping
  [Thu Sep 01 13:30:35.075040 2016] [so:warn] [pid 5096] AH01574: module wsgi_module is already loaded, skipping
  [Thu Sep 01 13:30:35.078421 2016] [auth_digest:notice] [pid 5096] AH01757: generating secret for digest authentication ...
  [Thu Sep 01 13:30:35.374300 2016] [mpm_prefork:notice] [pid 5096] AH00163: Apache/2.4.6 (CentOS) PHP/5.4.16 mod_wsgi/3.4 Python/2.7.5 configured -- resuming normal operations
  [Thu Sep 01 13:30:35.374357 2016] [core:notice] [pid 5096] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND'
  [Thu Sep 01 13:37:17.885730 2016] [mpm_prefork:notice] [pid 5096] AH00170: caught SIGWINCH, shutting down gracefully
  </code></pre>