Apache server crashed with error AH00051

[iNasser]

Hello,

I have been using VestaCP on Ubuntu 16.04 hosted in DigitalOcean to operate my WordPress site for more than 4 years. Its a reliable and great Control Panel.

My site is running very slow today and its keep timing out. So I checked the logs and find out that my Apache server has crashed.

ProblemType: Crash
Architecture: amd64
CrashCounter: 1
Date: Mon Apr 20 05:32:34 2020
DistroRelease: Ubuntu 16.04
ExecutablePath: /usr/sbin/apache2
ExecutableTimestamp: 1568641796
ProcCmdline: /usr/sbin/apache2 -k start
ProcEnviron: Error: [Errno 13] Permission denied: 'environ'
ProcMaps: Error: [Errno 13] Permission denied: 'maps'

I am also continuously getting this [core:notice]

[pid 1783] AH00051: child pid XXXX exit signal Aborted (6), possible coredump in /etc/apache2

I have noticed that with every restart for the server I am getting this Warnings

2020-04-20T05:12:23.775584Z 0 [Warning] Changed limits: max_open_files: 1024 (requested 5000)
2020-04-20T05:12:24.195135Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).

While looking into the logs I found the following errors yesterday, Is this an attack, someone is trying to run a script?

[Sun Apr 19 18:23:02.188657 2020] [:error] [pid 4243] [client 138.68.XXX.XXX:34886] script '/home/admin/web/138.68.XXX.XXX/public_html/shh.php' not found or unable to stat
[Sun Apr 19 18:23:02.541020 2020] [:error] [pid 4244] [client 138.68.XXX.XXX:34888] script '/home/admin/web/138.68.XXX.XXX/public_html/ddd.php' not found or unable to stat
[Sun Apr 19 18:23:02.889210 2020] [:error] [pid 18503] [client 138.68.XXX.XXX:34890] script '/home/admin/web/138.68.XXX.XXX/public_html/nnn.php' not found or unable to stat
[Sun Apr 19 18:23:03.234210 2020] [:error] [pid 4239] [client 138.68.XXX.XXX:34894] script '/home/admin/web/138.68.XXX.XXX/public_html/rrr.php' not found or unable to stat
[Sun Apr 19 18:23:03.584929 2020] [:error] [pid 4237] [client 138.68.XXX.XXX:34896] script '/home/admin/web/138.68.XXX.XXX/public_html/ttt.php' not found or unable to stat
[Sun Apr 19 18:23:03.932850 2020] [:error] [pid 4241] [client 138.68.XXX.XXX:34898] script '/home/admin/web/138.68.XXX.XXX/public_html/bbqq.php' not found or unable to stat
[Sun Apr 19 18:23:10.682260 2020] [:error] [pid 18588] [client 138.68.XXX.XXX:34906] script '/home/admin/web/138.68.XXX.XXX/public_html/tyrant.php' not found or unable to stat
[Sun Apr 19 18:23:11.029368 2020] [:error] [pid 4243] [client 138.68.XXX.XXX:34908] script '/home/admin/web/138.68.XXX.XXX/public_html/qiqi.php' not found or unable to stat
[Sun Apr 19 18:23:11.379702 2020] [:error] [pid 4244] [client 138.68.XXX.XXX:34910] script '/home/admin/web/138.68.XXX.XXX/public_html/qiqi1.php' not found or unable to stat
[Sun Apr 19 18:23:11.726198 2020] [:error] [pid 18503] [client 138.68.XXX.XXX:34912] script '/home/admin/web/138.68.XXX.XXX/public_html/zhk.php' not found or unable to stat
[Sun Apr 19 18:23:16.089367 2020] [:error] [pid 18507] [client 138.68.XXX.XXX:34926] script '/home/admin/web/138.68.XXX.XXX/public_html/index.php' not found or unable to stat

I activated "Under Attack Mode" from CloudFlare and its helping in keeping the site running without timing out.

Can anyone please assist me fixing the problem with my Apache server?

Thank you

[iNasser]

The problem was related to DigitalOcean services and its now fixed.