Apache restarts itself

Hello,
I have seen that Apache restarts itself everyday at 00:00. Is it normal? if yes, why it happens? Thank you.
[Tue Oct 26 00:00:01.989315 2021] [mpm_event:notice] [pid 588:tid 140343728706688] AH00493: SIGUSR1 received. Doing graceful restart

I’m sorry but this is to less informations. You probaly want to spin up a google search with the error message or check your system logs for any other, probaly related lines.

I am attaching the logs for your review.

/var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308’, referer: Roundcube Webmail :: Welcome to Roundcube Webmail
[Tue Oct 26 18:56:15.095317 2021] [proxy_fcgi:error] [pid 5738:tid 140343391500032] [client 80.122.213.118:0] AH01071: Got error ‘PHP message: PHP Warning: file_put_contents(/var/log/roundcube/session.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/imap.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/imap.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/imap.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/imap.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/imap.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/imap.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/imap.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/errors.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: Login failed for h.roth against localhost from 80.122.213.118(X-Forwarded-For: 80.122.213.118). AUTHENTICATE PLAIN: Temporary authentication failure. [mail.crype.eu:2021-10-26 16:56:14] in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1419PHP message: PHP Warning: file_put_contents(/var/log/roundcube/session.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308’, referer: Roundcube Webmail :: Welcome to Roundcube Webmail
[Tue Oct 26 18:58:11.107163 2021] [proxy_fcgi:error] [pid 5738:tid 140343492212480] [client 80.122.213.118:0] AH01071: Got error ‘PHP message: PHP Warning: file_put_contents(/var/log/roundcube/session.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/imap.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/imap.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/imap.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/imap.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/imap.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/imap.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/imap.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/errors.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: Login failed for h.roth against localhost from 80.122.213.118(X-Forwarded-For: 80.122.213.118). AUTHENTICATE PLAIN: Temporary authentication failure. [mail.crype.eu:2021-10-26 16:58:10] in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1419PHP message: PHP Warning: file_put_contents(/var/log/roundcube/session.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308’, referer: https://webmail.crype.eu/
[Tue Oct 26 19:01:47.083627 2021] [proxy_fcgi:error] [pid 5738:tid 140343708178176] [client 80.122.213.118:0] AH01071: Got error ‘PHP message: PHP Warning: file_put_contents(/var/log/roundcube/session.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/imap.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/imap.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/imap.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/imap.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/imap.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/imap.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/imap.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: file_put_contents(/var/log/roundcube/errors.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308PHP message: PHP Warning: Login failed for t.uspalenko against localhost from 80.122.213.118(X-Forwarded-For: 80.122.213.118). AUTHENTICATE PLAIN: Temporary authentication failure. [mail.crype.eu:2021-10-26 17:01:46] in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1419PHP message: PHP Warning: file_put_contents(/var/log/roundcube/session.log): failed to open stream: Permission denied in /var/lib/roundcube/program/lib/Roundcube/rcube.php on line 1308’, referer: Roundcube Webmail :: Welcome to Roundcube Webmail
[Tue Oct 26 19:54:23.301115 2021] [proxy_fcgi:error] [pid 5738:tid 140343416678144] [client 101.36.117.135:0] AH01071: Got error ‘Primary script unknown’
[Tue Oct 26 20:24:21.793294 2021] [proxy_fcgi:error] [pid 5737:tid 140343559288576] [client 45.146.164.110:0] AH01071: Got error ‘Primary script unknown’
[Tue Oct 26 21:08:49.093608 2021] [proxy_fcgi:error] [pid 5738:tid 140343425070848] [client 5.188.210.227:0] AH01071: Got error ‘Primary script unknown’, referer: https://www.google.com/
[Wed Oct 27 00:00:01.937143 2021] [mpm_event:notice] [pid 588:tid 140343728706688] AH00493: SIGUSR1 received. Doing graceful restart

https://www.discoverbits.in/2045/apache-mpm_event-notice-sigusr1-received-graceful-restart

Rest for the errors are nothing special

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