Hi Yann, no sure whether this is due to your mpm event patch.
>From time to time i see the following error mesages in my logs and the only chance to fix it is to restart apache. [Thu Mar 16 01:00:35.445184 2017] [mpm_event:error] [pid 27485:tid 140212799559552] AH: scoreboard is full, not at MaxRequestWorkers.Increase ServerLimit. [Thu Mar 16 01:00:36.446178 2017] [mpm_event:error] [pid 27485:tid 140212799559552] AH: scoreboard is full, not at MaxRequestWorkers.Increase ServerLimit. [Thu Mar 16 01:00:37.447181 2017] [mpm_event:error] [pid 27485:tid 140212799559552] AH: scoreboard is full, not at MaxRequestWorkers.Increase ServerLimit. [Thu Mar 16 01:00:38.448177 2017] [mpm_event:error] [pid 27485:tid 140212799559552] AH: scoreboard is full, not at MaxRequestWorkers.Increase ServerLimit. [Thu Mar 16 01:00:39.449185 2017] [mpm_event:error] [pid 27485:tid 140212799559552] AH: scoreboard is full, not at MaxRequestWorkers.Increase ServerLimit. [Thu Mar 16 01:00:40.450184 2017] [mpm_event:error] [pid 27485:tid 140212799559552] AH: scoreboard is full, not at MaxRequestWorkers.Increase ServerLimit. Settings: ServerLimit 50 ThreadLimit 200 ThreadsPerChild 200 MinSpareThreads 200 MaxSpareThreads 400 MaxClients 10000 MaxRequestsPerChild 10000 MaxRequestWorkers isn't set at all. Greets, Stefan