Re: ''AH00288: scoreboard is full, not at MaxRequestWorkers'

[Luca Toscano <toscano.luca@xxxxxxxxx>]

Hi,

2017-08-29 2:07 GMT+02:00 <russellbell@xxxxxxxxx>:

        Some malicious persons are flooding our server ( Server
Version: Apache/2.4.27 (cPanel) OpenSSL/1.0.2k mod_bwlimited/1.4
Server MPM: worker Server Built: Aug 17 2017 00:51:40 ) with bogus
traffic.  It's been going down every few hours, often posting AH00288
errors first.
        What does this error mean?  Any suggestions for preventing
this?

there is a (hopefully) good explanation in https://httpd.apache.org/docs/2.4/mod/event.html#how-it-works "Graceful process termination and Scoreboard usage", in which it is explained what it means and how mpm-event tried to solve the problem. I would try to switch to mpm-event if possible to see if things improve.

Hope that helps,

Luca