I have a server used for shared hosting running Linux/Apache 2.4.3 event MPM
Apache is reporting "error scoreboard is full, not at MaxRequestWorkers" in the error log every second.
I don't know what this means and I am at a loss as I usually find plenty of information on apache errors reading the documentation or on google but not this time.
All websites seem to be online, but occasionally someone reports me he/she can't access his/her website and I am starting to wonder if this error has anything to do with it.
Before writing this question, I tried to increase ServerLimit and MaxClients and then httpd -k graceful but the issue didn't go away. I now tried httpd -k stop and httpd and the error is gone.
It looks to me as though httpd -k graceful was not good enough but still can't grasp why.