Apache constantly crashing every few hours after php update

Server Details:
Ubuntu 16.0.4.5 LTS
Server version: Apache/2.4.18 (Ubuntu)
PHP Version: PHP 7.2.14-1+ubuntu16.04.1+deb.sury.org+1
Server with 16GB of RAM, 8 Core CPU

Server Logs/Setup Configs will be posted at bottom of post.

I currently run PHP using the PHP-FPM. I have had it working just fine, until recently I believe, when PHP had some updates, and I updated it a few days ago.

Now, every few hours, it just seems that Apache crashes and I just have to start it back up. The server load isn't that big though. It is basically my own server that I pretty much use for myself. So I doubt it is anything related to the performance of the server/apache. (I mean, how much can I do myself).

Apache error log doesn't seem to point to much. This happened before, when I first migrated to PHPFPM. But I had some default settings for PHPFPM, so I just increased the settings, and was good.

Lot of the settings I chose for PHPFPM were done via this guide:
https://medium.com/@sbuckpesch/apache2-and-php-fpm-performance-optimization-step-by-step-guide-1bfecf161534

The only thing different now, is that this issue popped up once I updated PHP (I was on PHP 7.2.13). I have updated PHP before with no issues. Except this time, it did ask me to replace the php.ini file (or keep current version). I replaced it, and then just put my php configs back ini, which only consisted of max_execution_time being set to 360 and memory_limit to 768M. But other than that, not much else has changed.

So not sure where to go from here. I thought about ditching PHPFPM and go back to modphp, as I don't specifically need the performance gains of PHP-FPM. It is basically only me using and accessing the server. But I still want to figure this out anyways

Apache Log (/var/log/apache2/error.log)
20:40 looks to be when it crashed, 20:45 is when I restarted Apache

php-fpm error log doesn't seem to point to anything. At the time of apache shutdown, there was nothing.

These are my settings for relevant PHP/apache:

apache.conf

/etc/php/7.2/fpm/php-fpm.conf

/etc/php/7.2/fpm/pool.d/www. conf

/etc/apache2/mods-available/mpm_event.conf

 

Do you see multiple suspicious connections when Apache crashes? Also which http error code you see on your webpage during this crash?

 

I don't know about the connections to Apache. Actually, I just checked my access.log and it is empty. Probably should fix that

And I don't know the http error code. I mainly noticed it via my web irc page going down (but I would only see the software error message).

But, I was tinkering around with things more. I went back from PHP-FPM to running PHP as an Apache module. But was still getting the crashes. So not sure it was PHP-FPM. Last night, I ended up uninstalling Apache, then reinstalling Apache. Re-enabled PHP-FPM with those same settings above. And so far, it has been running fine. So not sure what might have happened. Maybe something during the PHP update shook somethings, I don't know.

 

If this happens again, you can change the LogLevel in the Apache configuration (/etc/apache2/apache2.conf) to debug, to get some extra details in the log files.

It should look like the following:

LogLevel debug

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