when the server done this happens 

[23:26:50 ERROR]: The server has stopped responding!
[23:26:50 ERROR]: Please report this to http://www.spigotmc.org/
[23:26:50 ERROR]: Be sure to include ALL relevant console errors and Minecraft crash reports
[23:26:50 ERROR]: Spigot version: git-Spigot-db6de12-18fbb24 (MC: 1.8.8)
[23:26:50 ERROR]: ------------------------------
[23:26:50 ERROR]: Server thread dump (Look for plugins here before reporting to Spigot!):
[23:26:50 ERROR]: ------------------------------
[23:26:50 ERROR]: Current Thread: Server thread
[23:26:50 ERROR]: PID: 16 | Suspended: false | Native: false | State: TIMED_WAITING
[23:26:50 ERROR]: Stack:
[23:26:50 ERROR]: java.lang.Thread.sleep(Native Method)
[23:26:50 ERROR]: net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:540)
[23:26:50 ERROR]: java.lang.Thread.run(Unknown Source)
[23:26:50 ERROR]: ------------------------------
[23:26:50 ERROR]: Entire Thread Dump:
[23:26:51 ERROR]: ------------------------------
[23:26:51 ERROR]: Current Thread: Thread-21
[23:26:51 ERROR]: PID: 78 | Suspended: false | Native: true | State: RUNNABLE
[23:26:51 ERROR]: Thread is waiting on monitor(s):
[23:26:51 ERROR]: Locked on:java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
[23:26:51 ERROR]: Stack:
[23:26:51 ERROR]: java.net.DualStackPlainSocketImpl.connect0(Native Method)
[23:26:51 ERROR]: java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
[23:26:51 ERROR]: java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
[23:26:51 ERROR]: java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
[23:26:51 ERROR]: java.net.AbstractPlainSocketImpl.connect(Unknown Source)
[23:26:51 ERROR]: java.net.PlainSocketImpl.connect(Unknown Source)
[23:26:51 ERROR]: java.net.SocksSocketImpl.connect(Unknown Source)
[23:26:51 ERROR]: java.net.Socket.connect(Unknown Source)
[23:26:51 ERROR]: java.net.Socket.connect(Unknown Source)
[23:26:51 ERROR]: java.net.Socket.<init>(Unknown Source)
[23:26:51 ERROR]: java.net.Socket.<init>(Unknown Source)
[23:26:51 ERROR]: a.y.y.g.f.L(vu:313)
[23:26:51 ERROR]: a.y.y.g.f$$Lambda$49/1828960540.run(Unknown Source)
[23:26:51 ERROR]: java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
[23:26:51 ERROR]: java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
[23:26:51 ERROR]: java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
[23:26:51 ERROR]: java.lang.Thread.run(Unknown Source)
[23:26:51 ERROR]: ------------------------------
[23:26:51 ERROR]: Current Thread: Craft Scheduler Thread - 6
[23:26:51 ERROR]: PID: 65 | Suspended: false | Native: true | State: RUNNABLE
[23:26:51 ERROR]: Thread is waiting on monitor(s):
[23:26:51 ERROR]: Locked on:java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
[23:26:51 ERROR]: Locked on:sun.net.www.http.HttpClient.openServer(Unknown Source)
[23:26:51 ERROR]: Locked on:sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(Unknown Source)
[23:26:51 ERROR]: Locked on:sun.net.www.protocol.http.HttpURLConnection.getOutputStream(Unknown Source)
[23:26:51 ERROR]: Stack:
[23:26:51 ERROR]: java.net.DualStackPlainSocketImpl.connect0(Native Method)
[23:26:51 ERROR]: java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
[23:26:51 ERROR]: java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
[23:26:51 ERROR]: java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
[23:26:51 ERROR]: java.net.AbstractPlainSocketImpl.connect(Unknown Source)
[23:26:51 ERROR]: java.net.PlainSocketImpl.connect(Unknown Source)
[23:26:51 ERROR]: PID: 49 | Suspended: false | Native: false | State: TIMED_WAITING
[23:26:51 ERROR]: Stack:
[23:26:51 ERROR]: sun.misc.Unsafe.park(Native Method)
[23:26:51 ERROR]: java.util.concurrent.locks.LockSupport.parkNanos(Unknown Source)
[23:26:51 ERROR]: java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(Unknown Source)
[23:26:51 ERROR]: java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(Unknown Source)
[23:26:51 ERROR]: java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(Unknown Source)
[23:26:51 ERROR]: java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
[23:26:51 ERROR]: java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
[23:26:51 ERROR]: java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
[23:26:51 ERROR]: java.lang.Thread.run(Unknown Source)
[23:26:51 ERROR]: ------------------------------
[23:26:51 ERROR]: Current Thread: RxScheduledExecutorPool-2
[23:26:51 ERROR]: PID: 48 | Suspended: false | Native: false | State: TIMED_WAITING
[23:26:51 ERROR]: Stack: