Server Closing Itself

I get this problem every time i open a server when its heavily populated, Ill wait in the queue for 20 mins - half an hour waiting to get a server, once it finally starts up ill get in, i'm not doing anything that would result in a timeout because ill have the server with me on it and only 1 spot open in case my friend joins me while i'm on like i'm allowed to and while i'm on playing or building after 3 - 5 mins my game will disconnect and the reason being is "The Server Was Shut Down" but i didn't shut it down and it always happens, so i end up wasting my time waiting and waiting in the queue just to get on for 5 mins and my server shuts itself down, whenever the population of people using the server is lower, the server will run perfectly fine and i will not get even 1 disconnect or error, so i know its not any of the plug-ins i'm using either, and if it was an error i don't really think i would get a "Server Was Shut Down" Response. - Is This supposed to be happening as some way to save resources that i don't know about or i don't know whats going on here i'm confused.

No, Read This https://blog.aternos.org/post/58 <--- They added the ability to have At the very least 1 spot open without it Closing the server down since it was such a hassle to turn the server off or restart just for 1 more slot, So having 2 Open With me on and 1 Empty would not cause it to be shut down, or even get a timer count.

Quote from matthias

Lots of you told us, how annoying it is, if a friend comes a bit later or maybe somebody has to stop playing for some time and you have to restart your server just for one slot. Because of that we have decided that our system will not stop your server if there is just one slot empty. So from now on you can start your server with one slot more and your server will not be stopped because of this single empty slot.