Not in GZip Format

Sorry for this tread, but my server can't start with bukkit! It give me a lot of errors!

Code:

161 recipes
17 achievements
14:43:52 [INFO] Starting minecraft server version Beta 1.8.1
14:43:52 [INFO] Loading properties
14:43:52 [INFO] Starting Minecraft server on 94.251.22.116:25565
14:43:52 [WARNING] **** SERVER IS RUNNING IN OFFLINE/INSECURE MODE!
14:43:52 [WARNING] The server will make no attempt to authenticate usernames. Be
ware.
14:43:52 [WARNING] While this makes the game possible to play without internet a
ccess, it also opens up the ability for hackers to connect with any username the
y choose.
14:43:52 [WARNING] To change this, set "online-mode" to "true" in the server.set
tings file.
14:43:52 [INFO] This server is running Craftbukkit version git-Bukkit-0.0.0-1131
-g86b7fa8-b1337jnks (MC: 1.8.1)
14:43:53 [INFO] DataSourcePool [BedRespawn] autoCommit[false] transIsolation[SER
IALIZABLE] min[2] max[20]
14:43:53 [INFO] SubClassFactory parent ClassLoader [org.bukkit.plugin.java.Plugi
nClassLoader]
14:43:53 [INFO] Entities enhanced[0] subclassed[1]
14:43:53 [INFO] LWC     Loading shared objects
14:43:53 [INFO] Cache   Protection cache: 0/10000
14:43:53 [INFO] LWC     Native library: plugins/LWC/lib/native/Windows/x86/sqlit
ejdbc.dll
14:43:54 [INFO] [BaseBukkitPlugin 1.0] initialized
14:43:54 [INFO] [Permissions] (Yeti) was initialized.
14:43:54 [INFO] [Safe Creeper] Safe Creeper V0.3.2 Enabled
14:43:54 [INFO] Preparing level "Equestria"
14:43:54 [SEVERE] java.io.IOException: Not in GZIP format
14:43:54 [SEVERE]       at java.util.zip.GZIPInputStream.readHeader(Unknown Sour
ce)
14:43:54 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
14:43:54 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
14:43:54 [SEVERE]       at net.minecraft.server.CompressedStreamTools.a(SourceFi
le:9)
14:43:54 [SEVERE]       at net.minecraft.server.WorldLoader.b(SourceFile:50)
14:43:54 [SEVERE]       at net.minecraft.server.WorldLoaderServer.isConvertable(
SourceFile:73)
14:43:54 [SEVERE]       at net.minecraft.server.MinecraftServer.a(MinecraftServe
r.java:169)
14:43:54 [SEVERE]       at net.minecraft.server.MinecraftServer.init(MinecraftSe
rver.java:152)
14:43:54 [SEVERE]       at net.minecraft.server.MinecraftServer.run(MinecraftSer
ver.java:348)
14:43:54 [SEVERE]       at net.minecraft.server.ThreadServerApplication.run(Sour
ceFile:417)
14:43:54 [SEVERE] java.io.IOException: Not in GZIP format
14:43:54 [SEVERE]       at java.util.zip.GZIPInputStream.readHeader(Unknown Sour
ce)
14:43:54 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
14:43:54 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
14:43:54 [SEVERE]       at net.minecraft.server.CompressedStreamTools.a(SourceFi
le:9)
14:43:54 [SEVERE]       at net.minecraft.server.WorldLoader.b(SourceFile:61)
14:43:54 [SEVERE]       at net.minecraft.server.WorldLoaderServer.isConvertable(
SourceFile:73)
14:43:54 [SEVERE]       at net.minecraft.server.MinecraftServer.a(MinecraftServe
r.java:169)
14:43:54 [SEVERE]       at net.minecraft.server.MinecraftServer.init(MinecraftSe
rver.java:152)
14:43:54 [SEVERE]       at net.minecraft.server.MinecraftServer.run(MinecraftSer
ver.java:348)
14:43:54 [SEVERE]       at net.minecraft.server.ThreadServerApplication.run(Sour
ceFile:417)
14:43:54 [INFO] Default game type: 0
14:43:54 [SEVERE] java.io.IOException: Not in GZIP format
14:43:54 [SEVERE]       at java.util.zip.GZIPInputStream.readHeader(Unknown Sour
ce)
14:43:54 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
14:43:54 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
14:43:54 [SEVERE]       at net.minecraft.server.CompressedStreamTools.a(SourceFi
le:9)
14:43:54 [SEVERE]       at net.minecraft.server.PlayerNBTManager.c(PlayerNBTMana
ger.java:93)
14:43:54 [SEVERE]       at net.minecraft.server.World.<init>(World.java:128)
14:43:54 [SEVERE]       at net.minecraft.server.WorldServer.<init>(WorldServer.j
ava:27)
14:43:54 [SEVERE]       at net.minecraft.server.MinecraftServer.a(MinecraftServe
r.java:191)
14:43:54 [SEVERE]       at net.minecraft.server.MinecraftServer.init(MinecraftSe
rver.java:152)
14:43:54 [SEVERE]       at net.minecraft.server.MinecraftServer.run(MinecraftSer
ver.java:348)
14:43:54 [SEVERE]       at net.minecraft.server.ThreadServerApplication.run(Sour
ceFile:417)
14:43:54 [SEVERE] java.io.IOException: Not in GZIP format
14:43:54 [SEVERE]       at java.util.zip.GZIPInputStream.readHeader(Unknown Sour
ce)
14:43:54 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
14:43:54 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
14:43:54 [SEVERE]       at net.minecraft.server.CompressedStreamTools.a(SourceFi
le:9)
14:43:54 [SEVERE]       at net.minecraft.server.PlayerNBTManager.c(PlayerNBTMana
ger.java:104)
14:43:54 [SEVERE]       at net.minecraft.server.World.<init>(World.java:128)
14:43:54 [SEVERE]       at net.minecraft.server.WorldServer.<init>(WorldServer.j
ava:27)
14:43:54 [SEVERE]       at net.minecraft.server.MinecraftServer.a(MinecraftServe
r.java:191)
14:43:54 [SEVERE]       at net.minecraft.server.MinecraftServer.init(MinecraftSe
rver.java:152)
14:43:54 [SEVERE]       at net.minecraft.server.MinecraftServer.run(MinecraftSer
ver.java:348)
14:43:54 [SEVERE]       at net.minecraft.server.ThreadServerApplication.run(Sour
ceFile:417)
14:43:54 [INFO] New max size: 400
14:43:54 [INFO] New max size: 784
14:43:54 [INFO] New max size: 1764
14:43:54 [INFO] New max size: 5476
14:43:54 [INFO] New max size: 18496
14:43:54 [INFO] New max size: 19044
14:43:54 [SEVERE] java.io.IOException: Not in GZIP format
14:43:54 [SEVERE]       at java.util.zip.GZIPInputStream.readHeader(Unknown Sour
ce)
14:43:54 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
14:43:54 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
14:43:54 [SEVERE]       at net.minecraft.server.CompressedStreamTools.a(SourceFi
le:9)
14:43:54 [SEVERE]       at net.minecraft.server.PlayerNBTManager.c(PlayerNBTMana
ger.java:93)
14:43:54 [SEVERE]       at net.minecraft.server.World.<init>(World.java:128)
14:43:54 [SEVERE]       at net.minecraft.server.WorldServer.<init>(WorldServer.j
ava:27)
14:43:54 [SEVERE]       at net.minecraft.server.SecondaryWorldServer.<init>(Seco
ndaryWorldServer.java:8)
14:43:54 [SEVERE]       at net.minecraft.server.MinecraftServer.a(MinecraftServe
r.java:221)
14:43:54 [SEVERE]       at net.minecraft.server.MinecraftServer.init(MinecraftSe
rver.java:152)
14:43:54 [SEVERE]       at net.minecraft.server.MinecraftServer.run(MinecraftSer
ver.java:348)
14:43:54 [SEVERE]       at net.minecraft.server.ThreadServerApplication.run(Sour
ceFile:417)
14:43:54 [SEVERE] java.io.IOException: Not in GZIP format
14:43:54 [SEVERE]       at java.util.zip.GZIPInputStream.readHeader(Unknown Sour
ce)
14:43:54 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
14:43:54 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
14:43:54 [SEVERE]       at net.minecraft.server.CompressedStreamTools.a(SourceFi
le:9)
14:43:54 [SEVERE]       at net.minecraft.server.PlayerNBTManager.c(PlayerNBTMana
ger.java:104)
14:43:54 [SEVERE]       at net.minecraft.server.World.<init>(World.java:128)
14:43:54 [SEVERE]       at net.minecraft.server.WorldServer.<init>(WorldServer.j
ava:27)
14:43:54 [SEVERE]       at net.minecraft.server.SecondaryWorldServer.<init>(Seco
ndaryWorldServer.java:8)
14:43:54 [SEVERE]       at net.minecraft.server.MinecraftServer.a(MinecraftServe
r.java:221)
14:43:54 [SEVERE]       at net.minecraft.server.MinecraftServer.init(MinecraftSe
rver.java:152)
14:43:54 [SEVERE]       at net.minecraft.server.MinecraftServer.run(MinecraftSer
ver.java:348)
14:43:54 [SEVERE]       at net.minecraft.server.ThreadServerApplication.run(Sour
ceFile:417)
14:43:54 [INFO] Unable to find spawn biome
14:43:54 [SEVERE] java.lang.NullPointerException
14:43:54 [SEVERE]       at net.minecraft.server.WorldServer.c(WorldServer.java:1
62)
14:43:54 [SEVERE]       at net.minecraft.server.World.a(World.java:2224)
14:43:54 [SEVERE]       at net.minecraft.server.Chunk.addEntities(Chunk.java:634
)
14:43:54 [SEVERE]       at net.minecraft.server.ChunkProviderServer.getChunkAt(C
hunkProviderServer.java:81)
14:43:54 [SEVERE]       at net.minecraft.server.ChunkProviderServer.getOrCreateC
hunk(ChunkProviderServer.java:106)
14:43:54 [SEVERE]       at net.minecraft.server.World.getChunkAt(World.java:300)

14:43:54 [SEVERE]       at net.minecraft.server.World.getTypeId(World.java:247)
14:43:54 [SEVERE]       at net.minecraft.server.World.isEmpty(World.java:251)
14:43:54 [SEVERE]       at net.minecraft.server.World.a(World.java:218)
14:43:54 [SEVERE]       at net.minecraft.server.WorldProviderHell.canSpawn(Sourc
eFile:37)
14:43:54 [SEVERE]       at net.minecraft.server.World.canSpawn(World.java:104)
14:43:54 [SEVERE]       at net.minecraft.server.World.c(World.java:202)
14:43:54 [SEVERE]       at net.minecraft.server.World.<init>(World.java:150)
14:43:54 [SEVERE]       at net.minecraft.server.WorldServer.<init>(WorldServer.j
ava:27)
14:43:54 [SEVERE]       at net.minecraft.server.SecondaryWorldServer.<init>(Seco
ndaryWorldServer.java:8)
14:43:54 [SEVERE]       at net.minecraft.server.MinecraftServer.a(MinecraftServe
r.java:221)
14:43:54 [SEVERE]       at net.minecraft.server.MinecraftServer.init(MinecraftSe
rver.java:152)
14:43:54 [SEVERE]       at net.minecraft.server.MinecraftServer.run(MinecraftSer
ver.java:348)
14:43:54 [SEVERE]       at net.minecraft.server.ThreadServerApplication.run(Sour
ceFile:417)
14:43:54 [SEVERE] Unexpected exception
java.lang.NullPointerException
        at net.minecraft.server.WorldServer.c(WorldServer.java:162)
        at net.minecraft.server.World.a(World.java:2224)
        at net.minecraft.server.Chunk.addEntities(Chunk.java:634)
        at net.minecraft.server.ChunkProviderServer.getChunkAt(ChunkProviderServ
er.java:81)
        at net.minecraft.server.ChunkProviderServer.getOrCreateChunk(ChunkProvid
erServer.java:106)
        at net.minecraft.server.World.getChunkAt(World.java:300)
        at net.minecraft.server.World.getTypeId(World.java:247)
        at net.minecraft.server.World.isEmpty(World.java:251)
        at net.minecraft.server.World.a(World.java:218)
        at net.minecraft.server.WorldProviderHell.canSpawn(SourceFile:37)
        at net.minecraft.server.World.canSpawn(World.java:104)
        at net.minecraft.server.World.c(World.java:202)
        at net.minecraft.server.World.<init>(World.java:150)
        at net.minecraft.server.WorldServer.<init>(WorldServer.java:27)
        at net.minecraft.server.SecondaryWorldServer.<init>(SecondaryWorldServer
.java:8)
        at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:221)
        at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:152)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:348)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:417)
>

What should I do?

 

Your 'Equestria' world is pooched. If you have a known-good backup that you can restore, do that.

If you don't have a known-good backup to restore, this is where you hit yourself for not already having implemented a backup. After the sting wears off, run that world through Chunkster and see if that doesn't take care of it.

Then once you're done that, for the love of god, get a backup routine in place.

 

Put server in online mode -- makes world bug appear less

 

@Riolu
No need to use all caps in your title. This is an extremely common error if your server isn't shut down properly (use the stop command).

In any event, open your world with MCEdit - it *might* fix it. If it doesn't, you need to restore from backups.