Exception in server tick loop

I have been getting this crash report a lot lately, it doesn`t give me console error at all it just tells me that it is stopping the server and disabling random plugins here are the crash reports:
http://pastie.org/7998628#5
http://pastie.org/7998633#10
http://pastie.org/7998634

This is what it giving me:

01:07:17 [INFO] [g] BossOfMyself: Hey sloejoe
01:07:17 [INFO] [g] slojoe: Hi
01:07:33 [INFO] BossOfMyself issued server command: /money
01:07:34 [INFO] BossOfMyself issued server command: /ec
01:07:36 [INFO] Stopping server
01:07:36 [INFO] [WorldGuard] Disabling WorldGuard v5.7.5
01:07:36 [INFO] [TownyChat] Disabling TownyChat v0.36