Problem/Bug Corrupt World

Hi there,
Today I loaded up my Craftbukkit server on 1.8 and played for a bit. Shortly after that, maybe an hour or so, the server stopped. I then thought there was something wrong with server and made a new server with the same world, plugins and server.properties but the problem still continued. I made a new world and put it in the server folder and it worked perfectly, so I realized that the world may be corrupted. (It didn't work on Singleplayer either) So I followed the Guide on Chunkster and Minecraft Region Fixer and it said that the world is fine. Please could someone help me resolve this issue? Here is the crash report from the server: http://pastebin.com/0brCQrU1
Thanks,
-Ethan