I did a Google search.
According to Wikipedia: "The Guru Meditation is an error notice displayed by early versions of the Commodore Amiga computer when they crashed. It is analogous to the "Blue Screen of Death" in Microsoft Windows operating systems, or a kernel panic in Unix. It has later been used as a message for unrecoverable errors in software such as Varnish[1] and VirtualBox.[2]"
And "Varnish Cache is a web application accelerator also known as a caching HTTP reverse proxy."
So, no hackers need be involved.