I can't go onto the minecraft server?!

Ive been on this server with lots of friends for about a year, and suddenly one day I try to log on like I would any other day, and the whole server crashes and shuts down, crashes everyone out and shutting them down also, that happened with another friend on the same server too. I need help I have no clue whats going on and I miss my friends =(
Added (1). The server owner is JujufroHD normally know as jujufro2005. He plays on pc and it has no actual ip (numbers) and its just a world we mess around in it. Ive tried changing my name to see but it just crashes. I think about Migrating it would work, But I don't know how to do that either

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