---- Minecraft Crash Report ----
// I just don't know what went wrong :(

Time: 3/4/17 9:33 PM
Description: Exception in server tick loop

java.lang.NullPointerException: Exception in server tick loop
        at net.minecraft.server.v1_8_R3.LoginListener.d(LoginListener.java:155)
        at net.minecraft.server.v1_8_R3.LoginListener.a(LoginListener.java:151)
        at net.minecraft.server.v1_8_R3.NetworkManager.l(NetworkManager.java:314)
        at net.minecraft.server.v1_8_R3.ServerConnection.c(ServerConnection.java:145)
        at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:871)
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:378)
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:710)
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:613)
        at java.lang.Thread.run(Thread.java:745)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

上面是报错

当靠这么点报错没什么用
请说下你做了什么东西后发生这个问题（之前还好吗？）

我没做什么 玩家在内玩 玩着玩着就这个样子了 就一直崩溃 显示 …… 我知道了 服务端损坏了……

Error: Invalid or corrupt jarfile kuniu.jar

1.请使用排除法：使用别的服务端试试（随便找简单点）
2.要么是空间硬盘内存不足

换了 服务端还是
04.03 22:06:53 [Server] INFO at org.bukkit.craftbukkit.Main.main(Main.java:201) [kuniu.jar:git-PaperSpigot-f6fba00-9935adc]
04.03 22:06:53 [Server] INFO at net.minecraft.server.v1_8_R3.MinecraftServer.main(MinecraftServer.java:980) [kuniu.jar:git-PaperSpigot-f6fba00-9935adc]
04.03 22:06:53 [Server] INFO at net.minecraft.server.v1_8_R3.DedicatedServer.<init>(DedicatedServer.java:43) ~[kuniu.jar:git-PaperSpigot-f6fba00-9935adc]
04.03 22:06:53 [Server] INFO at net.minecraft.server.v1_8_R3.MinecraftServer.<init>(MinecraftServer.java:126) ~[kuniu.jar:git-PaperSpigot-f6fba00-9935adc]
04.03 22:06:53 [Server] INFO at net.minecraft.server.v1_8_R3.UserCache.<init>(UserCache.java:70) ~[kuniu.jar:git-PaperSpigot-f6fba00-9935adc]
04.03 22:06:53 [Server] INFO at net.minecraft.server.v1_8_R3.UserCache.b(UserCache.java:191) ~[kuniu.jar:git-PaperSpigot-f6fba00-9935adc]
04.03 22:06:53 [Server] INFO at com.google.common.collect.Lists.reverse(Lists.java:759) ~[kuniu.jar:git-PaperSpigot-f6fba00-9935adc]
04.03 22:06:53 [Server] INFO at com.google.common.collect.Lists$ReverseList.<init>(Lists.java:767) ~[kuniu.jar:git-PaperSpigot-f6fba00-9935adc]
04.03 22:06:53 [Server] INFO at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:213) ~[kuniu.jar:git-PaperSpigot-f6fba00-9935adc]
04.03 22:06:53 [Server] INFO java.lang.NullPointerException
04.03 22:06:53 [Server] INFO Failed to start the minecraft server

也有一种可能性
就是，有熊孩子在你后台搞乱，看一下后台有没有什么不同（比如设置了定时重启），你可以修改密码试试。
这种情况我遇到过，不是乱讲的