My client has a few Wordpress websites and they ran into a strange issue. The stack is quite simple, just Wordpress and MariaDB both running in Docker, on Google Cloud.
When it happens, the server doesn’t respond, timing out. The VM is inaccessible, cannot SSH to the VM. We checked the log of both Wordpress and MariaDB, but couldn’t find anything useful to identify the issue. There was only normal logs, and then timing out.