- Plesk 12.5 for Linux
- Plesk Onyx for Linux
Apache crashes with the following error in
PLESK_INFO: [mpm_event:error] [pid 22565:tid 140163371042688] AH00485: scoreboard is full, not at MaxRequestWorkers
"MPM Event" mode is used by Apache.
Websites are periodically not available, the error is shown in browser:
CONFIG_TEXT: 502 Bad gateway
This is Apache bug with ID #53555.
As a workaround the following steps can be performed:
Log in to Plesk and open tab Tools & Settings > Apache Web Server
Change MPM mode option from Event to Prefork or Worker (if Worker is available in the operating system):
Log in to the server via SSH and change
restartin the file
for RHEL-based OS:
for Debian bases OS:
- Increase MaxRequestWorker settings according to the article Apache keeps going down: server reached MaxRequestWorkers setting
If none of the provided steps did help, check the website code. First of all, it should be checked that there are no any looped functions.