Applicable to:
- Plesk for Linux
Symptoms
-
Websites on Plesk server are slow or not available, sending emails via PHP script fails with:
CONFIG_TEXT: 500 Internal server error
-
Domains > exemple.com > Logs or
/var/www/vhosts/example.com/logs/error_logshow:CONFIG_TEXT: mod_fcgid: ap_pass_brigade failed in handle_request_ipc function, referer: http://www.example.com/index.php
Cause
The connection is being reset due to the FcgidMaxRequestsPerProcess limit has been reached. The parameter was previously defined in the web configuration:
-
On RedHat/CentOS/CloudLinux:
# grep FcgidMaxRequestsPerProcess /etc/httpd/conf.d/fcgid.conf /var/www/vhosts/system/example.com/conf/vhost.conf /var/www/vhosts/system/example.com/conf/httpd.conf
-
On Ubuntu/Debian:
# grep FcgidMaxRequestsPerProcess /etc/apache2/mods-enabled/fcgid.conf /var/www/vhosts/system/example.com/conf/vhost.conf /var/www/vhosts/system/example.com/conf/httpd.conf
Resolution
-
Go to Domains > example.com > Apache & nginx Settings > Additional Apache directives.
-
Increase the
FcgidMaxRequestsPerProcessparameter value in Additional directives for HTTP and Additional directives for HTTPS fields:CONFIG_TEXT: <IfModule mod_fcgid.c>
FcgidMaxRequestsPerProcess 500
</IfModule>
-
Connect to the server via SSH.
-
Open
/etc/httpd/conf.d/fcgid.conf(on RedHat/CentOS/CloudLinux) or/etc/apache2/mods-enabled/fcgid.conf(on Ubuntu/Debian) using "vi"; -
Increase the value of
FcgidMaxRequestsPerProcessparameter, e.g. to 500:CONFIG_TEXT: <IfModule mod_fcgid.c>
FcgidMaxRequestsPerProcess 500
</IfModule> -
Reload Apache configuration:
-
On RedHat/CentOS/CloudLinux:
# systemctl reload httpd
-
On Ubuntu/Debian:
# systemctl reload apache2
-
-
If it does not help, set
FcgidOutputBufferSize 0in the same configuration file and reload Apache again.
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