这样的：
[16:18:08] [Server Watchdog/FATAL]: A single server tick took 60.14 seconds (should be max 0.05)
[16:18:08] [Server Watchdog/FATAL]: Considering it to be crashed, server will forcibly shutdown.
[16:18:09] [Server Watchdog/ERROR]: This crash report has been saved to: D:\Game\MC\.\crash-reports\crash-2015-02-15_16.18.08-server.txt
java.util.ConcurrentModificationException
        at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source)
        at java.util.TreeMap$KeyIterator.next(Unknown Source)
        at qu.a(SourceFile:574)
        at qu.a(SourceFile:554)
        at bfw.a(SourceFile:259)
        at bfw.a(SourceFile:114)
        at qt.b(SourceFile:160)
        at qt.a(SourceFile:204)
        at qu.a(SourceFile:766)
        at net.minecraft.server.MinecraftServer.a(SourceFile:361)
        at net.minecraft.server.MinecraftServer.s(SourceFile:384)
        at pf.run(SourceFile:716)
java.util.ConcurrentModificationException
        at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source)
        at java.util.TreeMap$KeyIterator.next(Unknown Source)
        at qu.a(SourceFile:574)
        at qu.a(SourceFile:554)
        at bfw.a(SourceFile:259)
        at bfw.a(SourceFile:114)
        at qt.b(SourceFile:160)
        at qt.a(SourceFile:204)
        at qu.a(SourceFile:766)
        at net.minecraft.server.MinecraftServer.a(SourceFile:361)
        at net.minecraft.server.MinecraftServer.s(SourceFile:384)
        at pf.run(SourceFile:716)
java.util.ConcurrentModificationException
        at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source)
        at java.util.TreeMap$KeyIterator.next(Unknown Source)
        at qu.a(SourceFile:574)
        at qu.a(SourceFile:554)
        at bfw.a(SourceFile:259)
        at bfw.a(SourceFile:114)
        at qt.b(SourceFile:160)
        at qt.a(SourceFile:204)
        at qu.a(SourceFile:766)
        at net.minecraft.server.MinecraftServer.a(SourceFile:361)
        at net.minecraft.server.MinecraftServer.s(SourceFile:384)
        at pf.run(SourceFile:716)
java.util.ConcurrentModificationException
        at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source)
        at java.util.TreeMap$KeyIterator.next(Unknown Source)
        at qu.a(SourceFile:574)
        at qu.a(SourceFile:554)
        at bfw.a(SourceFile:259)
        at bfw.a(SourceFile:114)
        at qt.b(SourceFile:160)
        at qt.a(SourceFile:204)
        at qu.a(SourceFile:766)
        at net.minecraft.server.MinecraftServer.a(SourceFile:361)
        at net.minecraft.server.MinecraftServer.s(SourceFile:384)
        at pf.run(SourceFile:716)
java.util.ConcurrentModificationException
        at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source)
        at java.util.TreeMap$KeyIterator.next(Unknown Source)
        at qu.a(SourceFile:574)
        at qu.a(SourceFile:554)
        at bfw.a(SourceFile:259)
        at bfw.a(SourceFile:114)
        at qt.b(SourceFile:160)
        at qt.a(SourceFile:204)
        at qu.a(SourceFile:766)
        at net.minecraft.server.MinecraftServer.a(SourceFile:361)
        at net.minecraft.server.MinecraftServer.s(SourceFile:384)
        at pf.run(SourceFile:716)
java.util.ConcurrentModificationException
        at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source)
        at java.util.TreeMap$KeyIterator.next(Unknown Source)
        at qu.a(SourceFile:574)
        at qu.a(SourceFile:554)
        at bfw.a(SourceFile:259)
        at bfw.a(SourceFile:114)
        at qt.b(SourceFile:160)
        at qt.a(SourceFile:204)
        at qu.a(SourceFile:766)
        at net.minecraft.server.MinecraftServer.a(SourceFile:361)
        at net.minecraft.server.MinecraftServer.s(SourceFile:384)
        at pf.run(SourceFile:716)
java.util.ConcurrentModificationException
        at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source)
        at java.util.TreeMap$KeyIterator.next(Unknown Source)
        at qu.a(SourceFile:574)
        at qu.a(SourceFile:554)
        at bfw.a(SourceFile:259)
        at bfw.a(SourceFile:114)
        at qt.b(SourceFile:160)
        at qt.a(SourceFile:204)
        at qu.a(SourceFile:766)
        at net.minecraft.server.MinecraftServer.a(SourceFile:361)
        at net.minecraft.server.MinecraftServer.s(SourceFile:384)
        at pf.run(SourceFile:716)
java.util.ConcurrentModificationException
        at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source)
        at java.util.TreeMap$KeyIterator.next(Unknown Source)
        at qu.a(SourceFile:574)
        at qu.a(SourceFile:554)
        at bfw.a(SourceFile:259)
        at bfw.a(SourceFile:114)
        at qt.b(SourceFile:160)
        at qt.a(SourceFile:204)
        at qu.a(SourceFile:766)
        at net.minecraft.server.MinecraftServer.a(SourceFile:361)
        at net.minecraft.server.MinecraftServer.s(SourceFile:384)
        at pf.run(SourceFile:716)
java.util.ConcurrentModificationException
        at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source)
        at java.util.TreeMap$KeyIterator.next(Unknown Source)
        at qu.a(SourceFile:574)
        at qu.a(SourceFile:554)
        at bfw.a(SourceFile:259)
        at bfw.a(SourceFile:114)
        at qt.b(SourceFile:160)
        at qt.a(SourceFile:204)
        at qu.a(SourceFile:766)
        at net.minecraft.server.MinecraftServer.a(SourceFile:361)
        at net.minecraft.server.MinecraftServer.s(SourceFile:384)
        at pf.run(SourceFile:716)
java.util.ConcurrentModificationException
        at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source)
        at java.util.TreeMap$KeyIterator.next(Unknown Source)
        at qu.a(SourceFile:574)
        at qu.a(SourceFile:554)
        at bfw.a(SourceFile:259)
        at bfw.a(SourceFile:114)
        at qt.b(SourceFile:160)
        at qt.a(SourceFile:204)
        at qu.a(SourceFile:766)
        at net.minecraft.server.MinecraftServer.a(SourceFile:361)
        at net.minecraft.server.MinecraftServer.s(SourceFile:384)
        at pf.run(SourceFile:716)
java.util.ConcurrentModificationException
        at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source)
        at java.util.TreeMap$KeyIterator.next(Unknown Source)
        at qu.a(SourceFile:574)
        at qu.a(SourceFile:554)
        at bfw.a(SourceFile:259)
        at bfw.a(SourceFile:114)
        at qt.b(SourceFile:160)
        at qt.a(SourceFile:204)
        at qu.a(SourceFile:766)
        at net.minecraft.server.MinecraftServer.a(SourceFile:361)
        at net.minecraft.server.MinecraftServer.s(SourceFile:384)
        at pf.run(SourceFile:716)

能确定是载入地图的问题。。
但是没有有效的解决方式

弄个限制动物生成插件 你到丛林 显示出来大量消耗就蹦了吧

自己顶一下