Not in GZIP format

Anyone have a clue what this means?

Code:

17:04:38 [INFO] Preparing level "world"
17:04:38 [SEVERE] java.io.IOException: Not in GZIP format
17:04:38 [SEVERE]       at java.util.zip.GZIPInputStream.readHeader(Unknown Sour
ce)
17:04:38 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
17:04:38 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
17:04:38 [SEVERE]       at net.minecraft.server.CompressedStreamTools.a(SourceFi
le:8)
17:04:38 [SEVERE]       at net.minecraft.server.WorldLoader.b(SourceFile:54)
17:04:38 [SEVERE]       at net.minecraft.server.WorldLoaderServer.isConvertable(
SourceFile:84)
17:04:38 [SEVERE]       at net.minecraft.server.MinecraftServer.a(MinecraftServe
r.java:156)
17:04:38 [SEVERE]       at net.minecraft.server.MinecraftServer.init(MinecraftSe
rver.java:144)
17:04:38 [SEVERE]       at net.minecraft.server.MinecraftServer.run(MinecraftSer
ver.java:259)
17:04:38 [SEVERE]       at net.minecraft.server.ThreadServerApplication.run(Sour
ceFile:394)
17:04:38 [INFO] Preparing start region
17:04:38 [SEVERE] java.io.IOException: Not in GZIP format
17:04:38 [SEVERE]       at java.util.zip.GZIPInputStream.readHeader(Unknown Sour
ce)
17:04:38 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
17:04:38 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
17:04:38 [SEVERE]       at net.minecraft.server.CompressedStreamTools.a(SourceFi
le:8)
17:04:38 [SEVERE]       at net.minecraft.server.PlayerNBTManager.c(SourceFile:92
)
17:04:38 [SEVERE]       at net.minecraft.server.World.<init>(World.java:72)
17:04:38 [SEVERE]       at net.minecraft.server.WorldServer.<init>(WorldServer.j
ava:21)
17:04:38 [SEVERE]       at net.minecraft.server.MinecraftServer.a(MinecraftServe
r.java:164)
17:04:38 [SEVERE]       at net.minecraft.server.MinecraftServer.init(MinecraftSe
rver.java:144)
17:04:38 [SEVERE]       at net.minecraft.server.MinecraftServer.run(MinecraftSer
ver.java:259)
17:04:38 [SEVERE]       at net.minecraft.server.ThreadServerApplication.run(Sour
ceFile:394)
17:04:38 [SEVERE] java.lang.NullPointerException
17:04:38 [SEVERE]       at net.minecraft.server.Entity.e(Entity.java:916)
17:04:38 [SEVERE]       at net.minecraft.server.EntityTypes.a(SourceFile:80)
17:04:38 [SEVERE]       at net.minecraft.server.ChunkLoader.a(SourceFile:178)
17:04:38 [SEVERE]       at net.minecraft.server.ChunkRegionLoader.a(SourceFile:4
2)
17:04:38 [SEVERE]       at net.minecraft.server.ChunkProviderServer.loadChunk(Ch
unkProviderServer.java:132)
17:04:38 [SEVERE]       at net.minecraft.server.ChunkProviderServer.getChunkAt(C
hunkProviderServer.java:62)
17:04:38 [SEVERE]       at net.minecraft.server.ChunkProviderServer.getOrCreateC
hunk(ChunkProviderServer.java:114)
17:04:38 [SEVERE]       at net.minecraft.server.World.getChunkAt(World.java:210)

17:04:38 [SEVERE]       at net.minecraft.server.World.getTypeId(World.java:153)
17:04:38 [SEVERE]       at net.minecraft.server.World.isEmpty(World.java:157)
17:04:38 [SEVERE]       at net.minecraft.server.World.a(World.java:125)
17:04:38 [SEVERE]       at net.minecraft.server.WorldProvider.a(SourceFile:51)
17:04:38 [SEVERE]       at net.minecraft.server.World.c(World.java:114)
17:04:38 [SEVERE]       at net.minecraft.server.World.<init>(World.java:94)
17:04:38 [SEVERE]       at net.minecraft.server.WorldServer.<init>(WorldServer.j
ava:21)
17:04:38 [SEVERE]       at net.minecraft.server.MinecraftServer.a(MinecraftServe
r.java:164)
17:04:38 [SEVERE]       at net.minecraft.server.MinecraftServer.init(MinecraftSe
rver.java:144)
17:04:38 [SEVERE]       at net.minecraft.server.MinecraftServer.run(MinecraftSer
ver.java:259)
17:04:38 [SEVERE]       at net.minecraft.server.ThreadServerApplication.run(Sour
ceFile:394)
17:04:38 [INFO] LWC     Loading shared objects
17:04:38 [INFO] LWC     Native library: plugins/LWC/lib/native/Windows/x86/sqlit
ejdbc.dll
17:04:38 [INFO] GroupManager - INFO - Scheduled Data Saving is set for every 10
minutes!
17:04:38 [INFO] GroupManager version 1.0(alpha-5) is enabled!
17:04:38 [INFO] Fake Permissions version 2.5.1 is enabled!
17:04:38 [INFO] [AntiBuild] version 1.4.0 enabled with multiworld support
17:04:38 [SEVERE] java.io.IOException: Not in GZIP format
17:04:38 [SEVERE]       at java.util.zip.GZIPInputStream.readHeader(Unknown Sour
ce)
17:04:38 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
17:04:38 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
17:04:38 [SEVERE]       at net.minecraft.server.CompressedStreamTools.a(SourceFi
le:8)
17:04:38 [SEVERE]       at net.minecraft.server.PlayerNBTManager.c(SourceFile:92
)
17:04:38 [SEVERE]       at net.minecraft.server.World.<init>(World.java:72)
17:04:38 [SEVERE]       at net.minecraft.server.WorldServer.<init>(WorldServer.j
ava:21)
17:04:38 [SEVERE]       at org.bukkit.craftbukkit.CraftServer.createWorld(CraftS
erver.java:317)
17:04:38 [SEVERE]       at org.bukkit.craftbukkit.CraftServer.createWorld(CraftS
erver.java:296)
17:04:38 [SEVERE]       at com.earth2me.essentials.Essentials.onEnable(Essential
s.java:164)
17:04:38 [SEVERE]       at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlug
in.java:127)
17:04:38 [SEVERE]       at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(
JavaPluginLoader.java:584)
17:04:38 [SEVERE]       at org.bukkit.plugin.SimplePluginManager.enablePlugin(Si
mplePluginManager.java:218)
17:04:38 [SEVERE]       at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftSe
rver.java:116)
17:04:38 [SEVERE]       at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftS
erver.java:94)
17:04:38 [SEVERE]       at net.minecraft.server.MinecraftServer.e(MinecraftServe
r.java:217)
17:04:38 [SEVERE]       at net.minecraft.server.MinecraftServer.a(MinecraftServe
r.java:204)
17:04:38 [SEVERE]       at net.minecraft.server.MinecraftServer.init(MinecraftSe
rver.java:144)
17:04:38 [SEVERE]       at net.minecraft.server.MinecraftServer.run(MinecraftSer
ver.java:259)
17:04:38 [SEVERE]       at net.minecraft.server.ThreadServerApplication.run(Sour
ceFile:394)
17:04:38 [SEVERE] java.io.IOException: Not in GZIP format
17:04:38 [SEVERE]       at java.util.zip.GZIPInputStream.readHeader(Unknown Sour
ce)
17:04:38 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
17:04:38 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
17:04:38 [SEVERE]       at net.minecraft.server.CompressedStreamTools.a(SourceFi
le:8)
17:04:38 [SEVERE]       at net.minecraft.server.PlayerNBTManager.c(SourceFile:10
4)
17:04:38 [SEVERE]       at net.minecraft.server.World.<init>(World.java:72)
17:04:38 [SEVERE]       at net.minecraft.server.WorldServer.<init>(WorldServer.j
ava:21)
17:04:38 [SEVERE]       at org.bukkit.craftbukkit.CraftServer.createWorld(CraftS
erver.java:317)
17:04:38 [SEVERE]       at org.bukkit.craftbukkit.CraftServer.createWorld(CraftS
erver.java:296)
17:04:38 [SEVERE]       at com.earth2me.essentials.Essentials.onEnable(Essential
s.java:164)
17:04:38 [SEVERE]       at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlug
in.java:127)
17:04:38 [SEVERE]       at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(
JavaPluginLoader.java:584)
17:04:38 [SEVERE]       at org.bukkit.plugin.SimplePluginManager.enablePlugin(Si
mplePluginManager.java:218)
17:04:38 [SEVERE]       at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftSe
rver.java:116)
17:04:38 [SEVERE]       at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftS
erver.java:94)
17:04:38 [SEVERE]       at net.minecraft.server.MinecraftServer.e(MinecraftServe
r.java:217)
17:04:38 [SEVERE]       at net.minecraft.server.MinecraftServer.a(MinecraftServe
r.java:204)
17:04:38 [SEVERE]       at net.minecraft.server.MinecraftServer.init(MinecraftSe
rver.java:144)
17:04:38 [SEVERE]       at net.minecraft.server.MinecraftServer.run(MinecraftSer
ver.java:259)
17:04:38 [SEVERE]       at net.minecraft.server.ThreadServerApplication.run(Sour
ceFile:394)

Happened just after my server crashed, everything was fine and error free. Then my box went down, came back up and this is what I am left with

This is with no plugins running at all

Code:

17:14:31 [SEVERE] java.io.IOException: Not in GZIP format
17:14:31 [SEVERE]       at java.util.zip.GZIPInputStream.readHeader(Unknown Sour
ce)
17:14:31 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
17:14:31 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
17:14:31 [SEVERE]       at net.minecraft.server.CompressedStreamTools.a(SourceFi
le:8)
17:14:31 [SEVERE]       at net.minecraft.server.WorldLoader.b(SourceFile:54)
17:14:31 [SEVERE]       at net.minecraft.server.WorldLoaderServer.isConvertable(
SourceFile:84)
17:14:31 [SEVERE]       at net.minecraft.server.MinecraftServer.a(MinecraftServe
r.java:156)
17:14:31 [SEVERE]       at net.minecraft.server.MinecraftServer.init(MinecraftSe
rver.java:144)
17:14:31 [SEVERE]       at net.minecraft.server.MinecraftServer.run(MinecraftSer
ver.java:259)
17:14:31 [SEVERE]       at net.minecraft.server.ThreadServerApplication.run(Sour
ceFile:394)
17:14:31 [INFO] Preparing start region
17:14:31 [SEVERE] java.io.IOException: Not in GZIP format
17:14:31 [SEVERE]       at java.util.zip.GZIPInputStream.readHeader(Unknown Sour
ce)
17:14:31 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
17:14:31 [SEVERE]       at java.util.zip.GZIPInputStream.<init>(Unknown Source)
17:14:31 [SEVERE]       at net.minecraft.server.CompressedStreamTools.a(SourceFi
le:8)
17:14:31 [SEVERE]       at net.minecraft.server.PlayerNBTManager.c(SourceFile:92
)
17:14:31 [SEVERE]       at net.minecraft.server.World.<init>(World.java:72)
17:14:31 [SEVERE]       at net.minecraft.server.WorldServer.<init>(WorldServer.j
ava:21)
17:14:31 [SEVERE]       at net.minecraft.server.MinecraftServer.a(MinecraftServe
r.java:164)
17:14:31 [SEVERE]       at net.minecraft.server.MinecraftServer.init(MinecraftSe
rver.java:144)
17:14:31 [SEVERE]       at net.minecraft.server.MinecraftServer.run(MinecraftSer
ver.java:259)
17:14:31 [SEVERE]       at net.minecraft.server.ThreadServerApplication.run(Sour
ceFile:394)

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

 

You world is corrupted, use Chunkster to fix it.

 

ok ty.

Didn't do anything, even tried spawning a new map and the same error occurs.

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

 

Restore from backups if chunkster didn't help.

 

But i find it quite odd that even from a new map being made, the same error occurs

 

You never mentioned new map before.
How do you make the new map? deleting the directory or changing the name in server.properties?

 

Ok, restored from back up and getting same error. Tried spawning multiple new maps and the same thing, any more suggestions?

Also @Plague I delete the directory

 

Look not in gzip format is an error many people have and it always ended up being the saved world corrupted.
I don't think that you are one in 50000 people (number of members here) that has something else miraculous. The error message says so itslef.

So, you are doing something wrong, if you really made a new world, I'm pretty sure the error would not be there.
Unless of course you have a disk corruption.

 

How can I be doing something wrong, when all I'am doing is deleting a world folder then replacing it with another? Like I said, everything was fine then my box went down, came back up and this happened.

Just checked over the maps I have on both of my servers and not one chunk error in sight, so it must be something else.

 

try creating the server again in a completely different directory.

 

How did your box go down? Did it cause hardware issues?

 

I got this too. I changed the allow-nether to false and I cannot open my world.