Random Spigot Crash

07.04 23:32:10 [Server] SEVERE java.lang.Thread.run(Unknown Source)
07.04 23:32:10 [Server] SEVERE io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:103)
07.04 23:32:10 [Server] SEVERE io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:295)
07.04 23:32:10 [Server] SEVERE io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:586)
07.04 23:32:10 [Server] SEVERE sun.nio.ch.SelectorImpl.select(Unknown Source)
07.04 23:32:10 [Server] SEVERE sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source)
07.04 23:32:10 [Server] SEVERE sun.nio.ch.EPollSelectorImpl.doSelect(Unknown Source)
07.04 23:32:10 [Server] SEVERE sun.nio.ch.EPollArrayWrapper.poll(Unknown Source)
07.04 23:32:10 [Server] SEVERE sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
07.04 23:32:10 [Server] SEVERE Stack:
07.04 23:32:10 [Server] SEVERE Locked on:sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source)
07.04 23:32:10 [Server] SEVERE Locked on:sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source)
07.04 23:32:10 [Server] SEVERE Locked on:sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source)
07.04 23:32:10 [Server] SEVERE Thread is waiting on monitor(s):
07.04 23:32:10 [Server] SEVERE PID: 19 | Suspended: false | Native: true | State: RUNNABLE
07.04 23:32:10 [Server] SEVERE Current Thread: Netty IO Thread - 3
07.04 23:32:10 [Server] SEVERE ------------------------------
07.04 23:32:10 [Server] SEVERE java.lang.Thread.run(Unknown Source)
07.04 23:32:10 [Server] SEVERE net.minecraft.server.v1_5_R1.FileIOThread.run(SourceFile:22)
07.04 23:32:10 [Server] SEVERE net.minecraft.server.v1_5_R1.FileIOThread.b(SourceFile:43)
07.04 23:32:10 [Server] SEVERE java.lang.Thread.sleep(Native Method)
07.04 23:32:10 [Server] SEVERE Stack:
07.04 23:32:10 [Server] SEVERE PID: 66 | Suspended: false | Native: false | State: TIMED_WAITING
07.04 23:32:10 [Server] SEVERE Current Thread: File IO Thread
07.04 23:32:10 [Server] SEVERE ------------------------------
07.04 23:32:10 [Server] SEVERE Current Thread State:
07.04 23:32:10 [Server] SEVERE Spigot version: git-Spigot-667 (MC: 1.5)
07.04 23:32:10 [Server] SEVERE Be sure to include ALL relevant console errors and Minecraft crash reports
07.04 23:32:10 [Server] SEVERE Please report this to http://www.spigotmc.org/
07.04 23:32:10 [Server] SEVERE The server has stopped responding!