It's nothing to do with you, the server could have many options of problems, depending on if it's an edited Minecraft Server, or a custom server. Edited minecraft servers have many issues, for they edit things like Acrobatics, and the message "Hangman11 Killed Joshua123" Editing the server is difficult and mostly, End of Stream means that the server needs to restart, or they are not running, possibly the owner could be on holiday, or at school. It might mean that your Computer cant run all the editing for they may of updated the server editing, or they have a new server and that server was cancled. If on a Custom server possibly it would only be for switching the server, or the server is not running currently.