We faced the following issue as “Apache Undergoing graceful restart automatically”, similar to apache was getting restarted gracefully every two hours.
#grep graceful /usr/local/apache/logs/error_log
Tue Oct 15 16:16:08 2013] [notice] Graceful restart requested, doing restart
Tue Oct 15 18:12:53 2013] [notice] Graceful restart requested, doing restart
Tue oct 15 20:09:39 2013] [notice] Graceful restart requested, doing restart
Tue Oct 15 18:12:53 2013] [notice] Graceful restart requested, doing restart
Tue oct 15 20:09:39 2013] [notice] Graceful restart requested, doing restart
It generally happens due to log processing. And we can fixed the issue by enabling piped apache logs using below method.
Create a backup copy of the Apache configuration file;
#cp -rp /usr/local/apache/conf/httpd.conf /usr/local/apache/conf/httpd.conf_prepipedlogging
Then edit /var/cpanel/cpanel.config:
#vi /var/cpanel/cpanel.config
And change it to as below.
enable_piped_logs=1
Make cPanel aware of the change:
#/usr/local/cpanel/whostmgr/bin/whostmgr2 –updatetweaksettings
Rebuild the Apache config:
/scripts/rebuildhttpdconf
Stop and Start Apache:
#service httpd stop
#service httpd start
#service httpd start
OR
you can enable piped logs via WHM using the following steps;
Login to WHM >> Click Service Configuration >> Click Apache Configuration >> Click Piped Log Configuration
Then Check the box labeled Enable piped Apache logs and finally Click the Save button.

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