[SEVERE] java.lang.ClassCastException: java.lang.reflect.Field cannot be cast to net.minecraft.serve

I just got a new error that google doesn't know about... First a normal error...

Code:

[SEVERE] java.net.SocketException: Socket closed
2011-07-20 02:58:13 [SEVERE]    at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:116)
2011-07-20 02:58:13 [SEVERE]    at java.net.SocketOutputStream.write(SocketOutputStream.java:153)
2011-07-20 02:58:13 [SEVERE]    at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82)
2011-07-20 02:58:13 [SEVERE]    at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140)
2011-07-20 02:58:13 [SEVERE]    at java.io.DataOutputStream.flush(DataOutputStream.java:123)
2011-07-20 02:58:13 [SEVERE]    at net.minecraft.server.NetworkWriterThread.run(SourceFile:116)

Then this error which I've never seen before (and the minecraft server software was down)

Code:

2011-07-20 03:56:43 [SEVERE] java.lang.ClassCastException: java.lang.reflect.Field cannot be cast to net.minecraft.server.NextTickListEntry
2011-07-20 03:56:43 [SEVERE]    at net.minecraft.server.NextTickListEntry.compareTo(SourceFile:3)
2011-07-20 03:56:43 [SEVERE]    at java.util.TreeMap.getEntry(TreeMap.java:346)
2011-07-20 03:56:43 [SEVERE]    at java.util.TreeMap.remove(TreeMap.java:595)
2011-07-20 03:56:43 [SEVERE]    at java.util.TreeSet.remove(TreeSet.java:276)
2011-07-20 03:56:43 [SEVERE]    at net.minecraft.server.World.a(World.java:1974)
2011-07-20 03:56:43 [SEVERE]    at net.minecraft.server.World.doTick(World.java:1722)
2011-07-20 03:56:43 [SEVERE]    at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:441)
2011-07-20 03:56:43 [SEVERE]    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:361)
2011-07-20 03:56:43 [SEVERE]    at net.minecraft.server.ThreadServerApplication.run(SourceFile:422)
2011-07-20 03:56:43 [SEVERE] Unexpected exception

Here's another console error that happened about the time the server crashed again...

Code:

2011-07-20 20:31:10 [SEVERE] java.lang.IllegalStateException: TickNextTick list out of synch
2011-07-20 20:31:10 [SEVERE]    at net.minecraft.server.World.a(World.java:1961)
2011-07-20 20:31:10 [SEVERE]    at net.minecraft.server.World.doTick(World.java:1722)
2011-07-20 20:31:10 [SEVERE]    at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:441)
2011-07-20 20:31:10 [SEVERE]    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:361)
2011-07-20 20:31:10 [SEVERE]    at net.minecraft.server.ThreadServerApplication.run(SourceFile:422)
2011-07-20 20:31:10 [SEVERE] Unexpected exception
java.lang.IllegalStateException: TickNextTick list out of synch
        at net.minecraft.server.World.a(World.java:1961)
        at net.minecraft.server.World.doTick(World.java:1722)
        at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:441)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:361)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:422)
2011-07-20 20:32:09 [INFO] Read timed out

Code:

20:37:53 [INFO] Plugins: WeatherSync, EasyBan, ColoredSigns, Flight, AntiMobSpawn, Permissions, ConfigurationAttributeProvider, Jail, iConomy, mcbans, LagMeter, LavaFurnace, ServerInfo, AuctionHouse, LWC, BorderGuard, Tombstone, BukkitContrib, SafeStop, Tips, PermissionsPlus, p2Aliases, WorldEdit, MultiVerse, Residence, Minequery, RemoteToolkitPlugin, dynmap, MinecraftViewer, Essentials, EssentialsChat, CommandSigns, OffLine, BigBrother, WorldGuard, HeroicDeath, iConomyChestShop, WurkIt, LogBlockQuestioner, ServerTime, EssentialsGeoIP, EssentialsSpawn, MineDJ, LogBlock, MobArena, Factions, NoCheat

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Have you updated all of your plugins?

 

I think this is a Network Packet Error (NPE for short)

Some plugins have them do to poor coding. Like gsand said, try to update your plugins