How to disable “Automatic…” in debug.log

The simplest solution: deactivate debug mode.

Another solution: deactivate the automatic updating of plugins, themes and core. See: https://www.wpbeginner.com/wp-tutorials/how-to-disable-automatic-updates-in-wordpress/

The simplest solution: deactivate debug mode.

No, that’s not the solution. Many developers use .log to monitor some issues, using it with cron jobs, send logs elsewhere if something happen, etc., even in production. Of course, we lock this file for public access.

Another solution: deactivate the automatic updating of plugins, themes and core

Another bad idea. Important forced security updates from the core will also be disabled. Trust me, you don’t want to keep code with any 0-day vulnerability.

How to disable them?

This is happening here: https://github.com/WordPress/WordPress/blob/8d059b9fe25d2415c164b2f53e1a458ccdc20f99/wp-admin/includes/class-wp-automatic-updater.php#L672 and I don’t see any filter to turn it off. Which is weird and inexplicable

Currently, one of my ideas is to use the sed -i command and run it with cron. This way you can delete the pattern.

I agree with @kanlukasz, this is weird. I’m a plugin developer and want to keep my dev servers in debug mode, but I now get an annoying error file every morning I start the server. I disabled automatic updates, but that is not ideal because of the security risks.

We need a filter hook for possibility to disable this… it’s really annoying…