Minecraft server not loading?

My Minecraft server, running Bukkit 1.6.4 R2, suddenly will not load.
It was starting fine earlier, and please do not say that it is a corrupted world, because it's not, I've tested that.
There are no errors in the log, I'll post the last few lines in it:
20:14:15 [INFO] [Multiverse-Core] Loading World & Settings - 'world' - Env: NORMAL - Type: NORMAL & seed: -2288584024124544857
20:14:15 [INFO] [Multiverse-Core] Loading World & Settings - 'world_nether' - Env: NETHER - Type: NORMAL & seed: -7497564628257033198
20:14:15 [INFO] [Multiverse-Core] Loading World & Settings - 'world_the_end' - Env: THE_END - Type: NORMAL & seed: -7497564628257033198
20:14:15 [INFO] [Multiverse-Core] 3 - World(s) loaded.
20:14:15 [INFO] [SpoutPlugin] Initializing precache for Multiverse-Core

No error, it just doesn't go any further. Also, I have tried removing Spout and Multiverse, however, nothing changed.

Again, the server had full functionality 30 seconds before this happened. The server restarted as I had set it to do, and every other time it came back up, no issue.

This is a major issue for me, and any support is greatly appreciated.

Try closing as many programs as you can first!