unusual SEVERE messages after server crash (tekkit)

[djscrew]

Launcher Version: tekkit 3.04

Operating System: Win 7 64 bit

Java Version: 1.7.5

Antivirus Program: this happens during load, it's concerning messages... these didn't happen before this crash... so far world seems fine though based on preliminary player reports

Description of Problem:

this happens during load, it's concerning messages... these didn't happen before this crash... so far world seems fine though based on preliminary player reports

Error Messages:

06:25 PM [sEVERE] java.util.zip.ZipException: Not in GZIP format

06:25 PM [sEVERE] at java.util.zip.GZIPInputStream.readHeader(Unknown Source)

06:25 PM [sEVERE] at java.util.zip.GZIPInputStream.<init>(Unknown Source)

06:25 PM [sEVERE] at net.minecraft.server.NBTCompressedStreamTools.a(SourceFile:9)

06:25 PM [sEVERE] at net.minecraft.server.WorldLoader.b(SourceFile:52)

06:25 PM [sEVERE] at net.minecraft.server.WorldLoaderServer.isConvertable(SourceFile:82)

06:25 PM [sEVERE] at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:294)

06:25 PM [sEVERE] at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:191)

06:25 PM [sEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:426)

06:25 PM [sEVERE] at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

06:25 PM [sEVERE] java.util.zip.ZipException: Not in GZIP format

06:25 PM [sEVERE] at java.util.zip.GZIPInputStream.readHeader(Unknown Source)

06:25 PM [sEVERE] at java.util.zip.GZIPInputStream.<init>(Unknown Source)

06:25 PM [sEVERE] at net.minecraft.server.NBTCompressedStreamTools.a(SourceFile:9)

06:25 PM [sEVERE] at net.minecraft.server.WorldNBTStorage.getWorldData(WorldNBTStorage.java:89)

06:25 PM [sEVERE] at net.minecraft.server.World.<init>(World.java:148)

06:25 PM [sEVERE] at net.minecraft.server.WorldServer.<init>(WorldServer.java:27)

06:25 PM [sEVERE] at net.minecraft.server.SecondaryWorldServer.<init>(SecondaryWorldServer.java:8)

06:25 PM [sEVERE] at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:299)

06:25 PM [sEVERE] at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:191)

06:25 PM [sEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:426)

06:25 PM [sEVERE] at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

06:25 PM [sEVERE] java.util.zip.ZipException: Not in GZIP format

06:25 PM [sEVERE] at java.util.zip.GZIPInputStream.readHeader(Unknown Source)

06:25 PM [sEVERE] at java.util.zip.GZIPInputStream.<init>(Unknown Source)

06:25 PM [sEVERE] at net.minecraft.server.NBTCompressedStreamTools.a(SourceFile:9)

06:25 PM [sEVERE] at net.minecraft.server.WorldLoader.b(SourceFile:52)

06:25 PM [sEVERE] at net.minecraft.server.WorldLoaderServer.isConvertable(SourceFile:82)

06:25 PM [sEVERE] at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:294)

06:25 PM [sEVERE] at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:191)

06:25 PM [sEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:426)

06:25 PM [sEVERE] at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

06:25 PM [sEVERE] java.util.zip.ZipException: Not in GZIP format

06:25 PM [sEVERE] at java.util.zip.GZIPInputStream.readHeader(Unknown Source)

06:25 PM [sEVERE] at java.util.zip.GZIPInputStream.<init>(Unknown Source)

06:25 PM [sEVERE] at net.minecraft.server.NBTCompressedStreamTools.a(SourceFile:9)

06:25 PM [sEVERE] at net.minecraft.server.WorldNBTStorage.getWorldData(WorldNBTStorage.java:89)

06:25 PM [sEVERE] at net.minecraft.server.World.<init>(World.java:148)

06:25 PM [sEVERE] at net.minecraft.server.WorldServer.<init>(WorldServer.java:27)

06:25 PM [sEVERE] at net.minecraft.server.SecondaryWorldServer.<init>(SecondaryWorldServer.java:8)

06:25 PM [sEVERE] at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:299)

06:25 PM [sEVERE] at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:191)

06:25 PM [sEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:426)

06:25 PM [sEVERE] at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

Error Log:

[Torezu]

Something is busted. The last time I saw this error, several of our alchemy bags were corrupted. I had to pull backups. It's usually the result of a server crash at the same time it happens to be saving chunk data.