I try to start my server but within 5 minutes it always crashes. Here is the crash report: http://pastebin.com/pLNCwYeP Can anyone help? bump EDIT by Moderator: merged posts, please use the edit button instead of double posting.
Try taking out the world folder and starting up the server. My guess is that you have a chunk error in the world which is crashing your server. If it still crashes just delete the new world folder it generated and move the original one back into your server folder, I don't know what else it could be if that's not it (Except for outdated plugins and bukkit/spigot.jar files)