Witch error.log do You mean? the error.log from apache2?
see below
Sun Oct 12 07:38:43.824460 2014] [mpm_prefork:notice] [pid 9976] AH00163: Apache/2.4.7 (Ubuntu) PHP/5.5.9-1ubuntu4.4 configured – resuming normal operations
[Sun Oct 12 07:38:43.825188 2014] [core:notice] [pid 9976] AH00094: Command line: ‘/usr/sbin/apache2’
[Mon Oct 13 08:20:54.657660 2014] [:error] [pid 17049] [client 192.168.50.114:62190] PHP Warning: require(…/commons/base.inc.php): failed to open stream: No such file or directory in /var/www/fog/service/servicemodule-active.php on line 2
[Mon Oct 13 08:20:54.657699 2014] [:error] [pid 17049] [client 192.168.50.114:62190] PHP Fatal error: require(): Failed opening required ‘…/commons/base.inc.php’ (include_path=‘.:/usr/share/php:/usr/share/pear’) in /var/www/fog/service/servicemodule-active.php on line 2
[Mon Oct 13 09:53:12.004752 2014] [:error] [pid 20312] [client 192.168.48.150:3406] PHP Warning: array_filter() expects parameter 1 to be array, null given in /var/www/fog/lib/pages/GroupManagementPage.class.php on line 252, referer: [url]http://192.168.48.80/fog/management/index.php?node=group&sub=add[/url]
[Mon Oct 13 10:27:39.172391 2014] [:error] [pid 21176] [client 192.168.49.55:60130] PHP Warning: array_filter() expects parameter 1 to be array, null given in /var/www/fog/lib/pages/GroupManagementPage.class.php on line 252, referer: [url]http://192.168.48.80/fog/management/index.php?node=group[/url]
[Mon Oct 13 12:13:12.532179 2014] [:error] [pid 17383] [client 192.168.51.125:57435] PHP Warning: require(…/commons/base.inc.php): failed to open stream: No such file or directory in /var/www/fog/service/servicemodule-active.php on line 2
[Mon Oct 13 12:13:12.532220 2014] [:error] [pid 17383] [client 192.168.51.125:57435] PHP Fatal error: require(): Failed opening required ‘…/commons/base.inc.php’ (include_path=‘.:/usr/share/php:/usr/share/pear’) in /var/www/fog/service/servicemodule-active.php on line 2
[Mon Oct 13 12:13:12.534216 2014] [:error] [pid 30433] [client 192.168.51.125:57436] PHP Warning: require(…/commons/base.inc.php): failed to open stream: No such file or directory in /var/www/fog/service/servicemodule-active.php on line 2
[Mon Oct 13 12:13:12.534253 2014] [:error] [pid 30433] [client 192.168.51.125:57436] PHP Fatal error: require(): Failed opening required ‘…/commons/base.inc.php’ (include_path=‘.:/usr/share/php:/usr/share/pear’) in /var/www/fog/service/servicemodule-active.php on line 2
[Tue Oct 14 08:57:47.526857 2014] [:error] [pid 23919] [client 192.168.51.107:63372] PHP Warning: require(…/commons/base.inc.php): failed to open stream: No such file or directory in /var/www/fog/service/servicemodule-active.php on line 2
[Tue Oct 14 08:57:47.526896 2014] [:error] [pid 23919] [client 192.168.51.107:63372] PHP Fatal error: require(): Failed opening required ‘…/commons/base.inc.php’ (include_path=‘.:/usr/share/php:/usr/share/pear’) in /var/www/fog/service/servicemodule-active.php on line 2
[Tue Oct 14 08:57:47.528859 2014] [:error] [pid 17383] [client 192.168.51.107:63371] PHP Warning: require(…/commons/base.inc.php): failed to open stream: No such file or directory in /var/www/fog/service/servicemodule-active.php on line 2
[Tue Oct 14 08:57:47.528889 2014] [:error] [pid 17383] [client 192.168.51.107:63371] PHP Fatal error: require(): Failed opening required ‘…/commons/base.inc.php’ (include_path=‘.:/usr/share/php:/usr/share/pear’) in /var/www/fog/service/servicemodule-active.php on line 2
[Tue Oct 14 09:45:51.274571 2014] [:error] [pid 21176] [client 192.168.48.150:42296] PHP Warning: array_filter() expects parameter 1 to be array, null given in /var/www/fog/lib/pages/GroupManagementPage.class.php on line 252, referer: [url]http://192.168.48.80/fog/management/index.php?node=group&sub=edit&id=1[/url]
[Tue Oct 14 10:14:59.066308 2014] [:error] [pid 30433] [client 192.168.51.125:50285] PHP Warning: require(…/commons/base.inc.php): failed to open stream: No such file or directory in /var/www/fog/service/servicemodule-active.php on line 2
[Tue Oct 14 10:14:59.066341 2014] [:error] [pid 30433] [client 192.168.51.125:50285] PHP Fatal error: require(): Failed opening required ‘…/commons/base.inc.php’ (include_path=‘.:/usr/share/php:/usr/share/pear’) in /var/www/fog/service/servicemodule-active.php on line 2
[Tue Oct 14 10:15:02.070390 2014] [:error] [pid 23919] [client 192.168.51.125:50286] PHP Warning: require(…/commons/base.inc.php): failed to open stream: No such file or directory in /var/www/fog/service/servicemodule-active.php on line 2
[Tue Oct 14 10:15:02.070420 2014] [:error] [pid 23919] [client 192.168.51.125:50286] PHP Fatal error: require(): Failed opening required
no not every task, as fare as i can see only the wake-up fuction.