I know what most of you are thinking as you read the title, but I have searched up and down the internet and have yet to find a solution to my issue. I am running ubuntu server 12.04, and just installed java, and bukkit. When I go to start bukkit it get the following error: Code: [WARNING] **** FAILED TO BIND TO PORT! [WARNING] The exception was: java.lang.NoSuchMethodError: method java.net.ServerSocket.setPerformancePreferences with signature (III)V was not found. [WARNING Perhaps a server is already running on that port? I have, rebooted, loaded into a desktop environment and checked task manager for any java or other process running, and nothing is running, according to netstat the port isnt in use either. Hopefully someone can help.