Crash help please!!

Using up all 8GB of your ram to restart plus the error messages given by Spigot Watchdog are inconclusive. I'd need your plugin list, and a detailed breakdown of your plugin usage. Unlike a recent thread I answered. Your issue is not showing a Java.lang.OutOfMemoryError: Java heap space error message. Which would indicate you aren't using intensive plugins and your version of git-spigot isn't leaking.

 

When will people understand that this isn't the cause of the issue at all, and simply means Spigot is attempting to restart the server due to it crashing.

 

It very much seems like you don't have a start.sh that would allow the server to restart. Do you have an automatically set restart timer on your server? If so find one that doesn't use start.sh or make one.