After Plesk automatic updates Apache service remains stopped.
User has to start service manually everytime.
Apache crashes with the following error in
[timestamp] [mpm_event:notice] [pid 20056:tid 140176783820672] AH00493: SIGUSR1 received. Doing graceful restart
[timestamp] [core:notice] [pid 20056] AH00060: seg fault or similar nasty error detected in the parent process
Websites are periodically down, they are showing the following nginx error:
502 Bad Gateway
The following errors can be found in
[error] 10485#0: *1947668 connect() failed (111: Connection refused) while connecting to upstream, client: 10.0.2.2, server: , request: "GET / HTTP/1.1", upstream: "http://10.0.2.2:7080/", host: "example.com"
- Unable to perform a graceful Apache restart. The following message can be shown in CLI or in Plesk:
Can not restart web server
Bug #PPPM-4566. Issue was fixed in Plesk 17.0 MU13.
For CentOS 6, CentOS 7, Debian 8, Ubuntu 14 and Ubuntu 16:
1. Change Apache worker mode from
mpm_prefork in Home > Tools & Settings > Apache Web Server Settings
2. Download patched file for server OS from attachment, unzip and install it:
3. Restart Apache
4. In some cases, server reboot may be required.
If the issue still persists, perform the following actions to disable graceful reload:
Increase the value '
Apache restart interval' to at least to 60 seconds at Plesk > Tools & Settings > Apache Web Server Settings
For Debian based systems :
apache2 reload' with '
apache2 restart' in
For RHEL based systems
httpd reload' with '
httpd restart' in
If the above steps do not help on Debian/Ubuntu OSes, edit log rotation settings of
/etc/logrotate.d/apache2 file. Change "
/etc/init.d/apache2 reload " to "
/etc/init.d/apache2 restart ":
# cat /etc/logrotate.d/apache2
/etc/init.d/apache2 restart > /dev/null;