求大神解答
无缘无故没用了，这是按了很多回车的结果，突然服务器不动了
到底是插件崩溃还是恶意攻击的 如果是攻击，又是什么东西攻击的呢？

你需要看崩溃的最后几条输出信息。或者看服务端crash-report里面的蹦服报告。发上来看看。

崩溃报告，。

[21:36:12] [Server thread/ERROR]: Could not pass event PlayerMoveEvent to ScriptBlock v0.8.72CN
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:330) ~[JavaPluginLoader$1.class:git-Cauldron-MCPC-Plus-1.7.2-1.1126.04.46]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[RegisteredListener.class:git-Cauldron-MCPC-Plus-1.7.2-1.1126.04.46]
        at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:30) ~[TimedRegisteredListener.class:git-Cauldron-MCPC-Plus-1.7.2-1.1126.04.46]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:487) [SimplePluginManager.class:git-Cauldron-MCPC-Plus-1.7.2-1.1126.04.46]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:472) [SimplePluginManager.class:git-Cauldron-MCPC-Plus-1.7.2-1.1126.04.46]
        at net.minecraft.network.NetHandlerPlayServer.func_147347_a(NetHandlerPlayServer.java:359) [mx.class:?]
        at net.minecraft.network.play.client.C03PacketPlayer.func_148833_a(C03PacketPlayer.java:36) [ir.class:?]
        at net.minecraft.network.play.client.C03PacketPlayer$C06PacketPlayerPosLook.func_148833_a(C03PacketPlayer.java:234) [it.class:?]
        at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:206) [ef.class:?]
        at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:173) [ms.class:?]
        at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:947) [MinecraftServer.class:?]
        at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:429) [lj.class:?]
        at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:777) [MinecraftServer.class:?]
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:640) [MinecraftServer.class:?]
        at java.lang.Thread.run(Unknown Source) [?:1.7.0_75]
Caused by: org.bukkit.command.CommandException: Unhandled exception executing command 'shopkeepers:shopkeeper' in plugin Shopkeepers v1.18
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[PluginCommand.class:git-Cauldron-MCPC-Plus-1.7.2-1.1126.04.46]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:175) ~[SimpleCommandMap.class:git-Cauldron-MCPC-Plus-1.7.2-1.1126.04.46]
        at org.bukkit.craftbukkit.v1_7_R1.CraftServer.dispatchCommand(CraftServer.java:642) ~[CraftServer.class:git-Cauldron-MCPC-Plus-1.7.2-1.1126.04.46]
        at org.bukkit.craftbukkit.v1_7_R1.entity.CraftPlayer.performCommand(CraftPlayer.java:263) ~[CraftPlayer.class:git-Cauldron-MCPC-Plus-1.7.2-1.1126.04.46]
        at scriptblock.options.permissions.BypassOp.isValid(BypassOp.java:21) ~[?:?]
        at scriptblock.options.SBOption.onOptionCall(SBOption.java:72) ~[?:?]
        at scriptblock.options.OptionHandler.readScript(OptionHandler.java:115) ~[?:?]
        at scriptblock.listeners.PlayerWalkBlock.onPlayerMove(PlayerWalkBlock.java:90) ~[?:?]
        at sun.reflect.GeneratedMethodAccessor75.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_75]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_75]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:328) ~[JavaPluginLoader$1.class:git-Cauldron-MCPC-Plus-1.7.2-1.1126.04.46]
        ... 14 more
Caused by: java.util.ConcurrentModificationException
        at java.util.HashMap$HashIterator.nextEntry(Unknown Source) ~[?:1.7.0_75]
        at java.util.HashMap$KeyIterator.next(Unknown Source) ~[?:1.7.0_75]
        at com.nisovin.shopkeepers.ShopkeepersPlugin.onDisable(ShopkeepersPlugin.java:256) ~[?:?]
        at com.nisovin.shopkeepers.ShopkeepersPlugin.reload(ShopkeepersPlugin.java:284) ~[?:?]
        at com.nisovin.shopkeepers.ShopkeepersPlugin.onCommand(ShopkeepersPlugin.java:292) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[PluginCommand.class:git-Cauldron-MCPC-Plus-1.7.2-1.1126.04.46]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:175) ~[SimpleCommandMap.class:git-Cauldron-MCPC-Plus-1.7.2-1.1126.04.46]
        at org.bukkit.craftbukkit.v1_7_R1.CraftServer.dispatchCommand(CraftServer.java:642) ~[CraftServer.class:git-Cauldron-MCPC-Plus-1.7.2-1.1126.04.46]
        at org.bukkit.craftbukkit.v1_7_R1.entity.CraftPlayer.performCommand(CraftPlayer.java:263) ~[CraftPlayer.class:git-Cauldron-MCPC-Plus-1.7.2-1.1126.04.46]
        at scriptblock.options.permissions.BypassOp.isValid(BypassOp.java:21) ~[?:?]
        at scriptblock.options.SBOption.onOptionCall(SBOption.java:72) ~[?:?]
        at scriptblock.options.OptionHandler.readScript(OptionHandler.java:115) ~[?:?]
        at scriptblock.listeners.PlayerWalkBlock.onPlayerMove(PlayerWalkBlock.java:90) ~[?:?]
        at sun.reflect.GeneratedMethodAccessor75.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_75]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_75]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:328) ~[JavaPluginLoader$1.class:git-Cauldron-MCPC-Plus-1.7.2-1.1126.04.46]
        ... 14 more
[21:36:12] [Server thread/INFO]: else
[21:36:41] [Server thread/INFO]: [ScriptBlock] Mr_Fang 触发了 walk 脚本方块...
[21:36:41] [Server thread/INFO]: [ScriptBlock] 在坐标 world,208,70,-944
[21:36:41] [Server thread/INFO]: 1015 lost connection: Disconnected
[21:36:41] [Server thread/INFO]: 1015 他妈妈喊他去吃饭了。
[21:36:41] [Server thread/INFO]: Kafeix lost connection: Disconnected
[21:36:41] [Server thread/INFO]: Kafeix 他妈妈喊他去吃饭了。
[21:36:41] [Server thread/INFO]: [ScriptBlock] Minecraft_QAQ 触发了 walk 脚本方块...
[21:36:41] [Server thread/INFO]: [ScriptBlock] 在坐标 world,208,70,-944
[21:36:41] [Server thread/INFO]: bossss lost connection: Disconnected
[21:36:42] [Server thread/INFO]: bossss 他妈妈喊他去吃饭了。
[21:36:42] [Server thread/INFO]: Ic_e lost connection: Disconnected
[21:36:42] [Server thread/INFO]: Ic_e 他妈妈喊他去吃饭了。
[21:36:42] [Server thread/INFO]: KGmmo lost connection: Disconnected
[21:36:42] [Server thread/INFO]: KGmmo 他妈妈喊他去吃饭了。
[21:36:42] [Server thread/INFO]: qinglan lost connection: Disconnected
[21:36:42] [Server thread/INFO]: qinglan 他妈妈喊他去吃饭了。
[21:36:42] [Server thread/INFO]: wo_kao lost connection: Disconnected
[21:36:42] [Server thread/INFO]: wo_kao 他妈妈喊他去吃饭了。
[21:36:42] [Server thread/INFO]: Myth_kai lost connection: Internal Exception: io.netty.handler.timeout.ReadTimeoutException
[21:36:42] [Server thread/INFO]: Myth_kai 他妈妈喊他去吃饭了。
[21:36:42] [Server thread/INFO]: AYyou lost connection: Disconnected
[21:36:42] [Server thread/INFO]: AYyou 他妈妈喊他去吃饭了。
[21:43:24] [pool-7-thread-1/INFO]: GroupManager - INFO -  Data files refreshed.

过来看一下

被压测了吧...我好像也试过，服务器的所有人直接退服，然后爆掉..

脚本方块插件 删了或换一个jar
村民交易也出了点问题，暂时说不清楚。。。

高频红石！！！！！！！！！！恶意搞崩！以前我的服务器就这样，弄了半天才弄好！

谢谢，我的问题自己解决了
原因是某个motd插件，还是换原来自己的吧，谢谢了