Over the course of the past two years or so, I have created at least four worlds in creative that have gone corrupt. Why I have been putting large in quotation marks is because the worlds I have been creating were meant to be quite large, but went corrupt before i could get more than MAYBE a quarter ways through building. My earliest encounter with this problem was about two years ago, on version 1.6.4. It has happend again today on version 1.10.2, but luckily I was smart enough to have recently copied the world onto a flashdrive. I have created an issue about this last time it happend a few months ago, and the person who responded was not very helpful. After I gave them some information about the problem, they said there was nothing that could be done, without any explanation, and marked the issue as a duplicate of something that was hardly related to the issue. I'm not sure whether it is because The world is too large or not (my most recently corrupt world was on a sky island world). That is the only explanation I could come up with, though.
Here is the game output when I open the game, click single player, then back out and exit the game.
Completely ignored arguments: [--nativeLauncherVersion, 307]
[19:53:27] [Client thread/INFO]: Setting user: warriorcat5
[19:53:31] [Client thread/WARN]: Skipping bad option: lastServer:
[19:53:31] [Client thread/INFO]: LWJGL Version: 2.9.4
[19:53:32] [Client thread/INFO]: Reloading ResourceManager: Default
[19:53:33] [Sound Library Loader/INFO]: Starting up SoundSystem...
[19:53:34] [Thread-5/INFO]: Initializing LWJGL OpenAL
[19:53:34] [Thread-5/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
AL lib: (EE) MMDevApiOpenPlayback: Device init failed: 0x80004005
AL lib: (EE) MMDevApiOpenPlayback: Device init failed: 0x80004005
[19:53:34] [Thread-5/ERROR]: Error in class 'LibraryLWJGLOpenAL'
[19:53:34] [Thread-5/ERROR]: Unable to initialize OpenAL. Probable cause: OpenAL not supported.
[19:53:34] [Thread-5/WARN]: ERROR MESSAGE:
[19:53:34] [Thread-5/INFO]: Could not locate OpenAL library.
[19:53:34] [Thread-5/WARN]: STACK TRACE:
[19:53:34] [Thread-5/INFO]: org.lwjgl.openal.AL.create(AL.java:156)
[19:53:34] [Thread-5/INFO]: org.lwjgl.openal.AL.create(AL.java:102)
[19:53:34] [Thread-5/INFO]: org.lwjgl.openal.AL.create(AL.java:206)
[19:53:34] [Thread-5/INFO]: paulscode.sound.libraries.LibraryLWJGLOpenAL.init(LibraryLWJGLOpenAL.java:164)
[19:53:34] [Thread-5/INFO]: paulscode.sound.SoundSystem.CommandNewLibrary(SoundSystem.java:1576)
[19:53:34] [Thread-5/INFO]: paulscode.sound.SoundSystem.CommandQueue(SoundSystem.java:2572)
[19:53:34] [Thread-5/INFO]: paulscode.sound.CommandThread.run(CommandThread.java:121)
[19:53:34] [Sound Library Loader/WARN]: ERROR MESSAGE:
[19:53:34] [Sound Library Loader/INFO]: Could not locate OpenAL library.
[19:53:34] [Sound Library Loader/INFO]: Starting up SoundSystem...
[19:53:34] [Thread-7/INFO]: Switching to No Sound
[19:53:34] [Thread-7/INFO]: (Silent Mode)
[19:53:35] [Sound Library Loader/INFO]: Sound engine started
[19:53:37] [Client thread/INFO]: Created: 1024x512 textures-atlas
[19:53:47] [Client thread/ERROR]: Exception reading C:\Users\Debbie\AppData\Roaming\.minecraft\saves\Steam Skies\level.dat
java.util.zip.ZipException: Not in GZIP format
at java.util.zip.GZIPInputStream.readHeader(GZIPInputStream.java:165) ~[?:1.8.0_25]
at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:79) ~[?:1.8.0_25]
at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:91) ~[?:1.8.0_25]
at ea.a(SourceFile:24) ~[1.10.2.jar:?]
at azz.a(SourceFile:82) [1.10.2.jar:?]
at azz.c(SourceFile:66) [1.10.2.jar:?]
at azw.b(SourceFile:57) [1.10.2.jar:?]
at big.e(SourceFile:35) [1.10.2.jar:?]
at big.<init>(SourceFile:28) [1.10.2.jar:?]
at bie.b(SourceFile:43) [1.10.2.jar:?]
at bft.a(SourceFile:372) [1.10.2.jar:?]
at bcx.a(SourceFile:900) [1.10.2.jar:?]
at bga.a(SourceFile:237) [1.10.2.jar:?]
at bft.a(SourceFile:346) [1.10.2.jar:?]
at bga.a(SourceFile:498) [1.10.2.jar:?]
at bft.k(SourceFile:409) [1.10.2.jar:?]
at bft.p(SourceFile:386) [1.10.2.jar:?]
at bcx.t(SourceFile:1586) [1.10.2.jar:?]
at bcx.av(SourceFile:968) [1.10.2.jar:?]
at bcx.a(SourceFile:396) [1.10.2.jar:?]
at net.minecraft.client.main.Main.main(SourceFile:124) [1.10.2.jar:?]
[19:53:47] [Client thread/ERROR]: Exception reading C:\Users\Debbie\AppData\Roaming\.minecraft\saves\Steam Skies\level.dat_old
java.util.zip.ZipException: Not in GZIP format
at java.util.zip.GZIPInputStream.readHeader(GZIPInputStream.java:165) ~[?:1.8.0_25]
at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:79) ~[?:1.8.0_25]
at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:91) ~[?:1.8.0_25]
at ea.a(SourceFile:24) ~[1.10.2.jar:?]
at azz.a(SourceFile:82) [1.10.2.jar:?]
at azz.c(SourceFile:74) [1.10.2.jar:?]
at azw.b(SourceFile:57) [1.10.2.jar:?]
at big.e(SourceFile:35) [1.10.2.jar:?]
at big.<init>(SourceFile:28) [1.10.2.jar:?]
at bie.b(SourceFile:43) [1.10.2.jar:?]
at bft.a(SourceFile:372) [1.10.2.jar:?]
at bcx.a(SourceFile:900) [1.10.2.jar:?]
at bga.a(SourceFile:237) [1.10.2.jar:?]
at bft.a(SourceFile:346) [1.10.2.jar:?]
at bga.a(SourceFile:498) [1.10.2.jar:?]
at bft.k(SourceFile:409) [1.10.2.jar:?]
at bft.p(SourceFile:386) [1.10.2.jar:?]
at bcx.t(SourceFile:1586) [1.10.2.jar:?]
at bcx.av(SourceFile:968) [1.10.2.jar:?]
at bcx.a(SourceFile:396) [1.10.2.jar:?]
at net.minecraft.client.main.Main.main(SourceFile:124) [1.10.2.jar:?]
[19:53:47] [Client thread/ERROR]: Exception reading C:\Users\Debbie\AppData\Roaming\.minecraft\saves\test\level.dat
java.util.zip.ZipException: Not in GZIP format
at java.util.zip.GZIPInputStream.readHeader(GZIPInputStream.java:165) ~[?:1.8.0_25]
at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:79) ~[?:1.8.0_25]
at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:91) ~[?:1.8.0_25]
at ea.a(SourceFile:24) ~[1.10.2.jar:?]
at azz.a(SourceFile:82) [1.10.2.jar:?]
at azz.c(SourceFile:66) [1.10.2.jar:?]
at azw.b(SourceFile:57) [1.10.2.jar:?]
at big.e(SourceFile:35) [1.10.2.jar:?]
at big.<init>(SourceFile:28) [1.10.2.jar:?]
at bie.b(SourceFile:43) [1.10.2.jar:?]
at bft.a(SourceFile:372) [1.10.2.jar:?]
at bcx.a(SourceFile:900) [1.10.2.jar:?]
at bga.a(SourceFile:237) [1.10.2.jar:?]
at bft.a(SourceFile:346) [1.10.2.jar:?]
at bga.a(SourceFile:498) [1.10.2.jar:?]
at bft.k(SourceFile:409) [1.10.2.jar:?]
at bft.p(SourceFile:386) [1.10.2.jar:?]
at bcx.t(SourceFile:1586) [1.10.2.jar:?]
at bcx.av(SourceFile:968) [1.10.2.jar:?]
at bcx.a(SourceFile:396) [1.10.2.jar:?]
at net.minecraft.client.main.Main.main(SourceFile:124) [1.10.2.jar:?]
[19:53:47] [Client thread/ERROR]: Exception reading C:\Users\Debbie\AppData\Roaming\.minecraft\saves\test\level.dat_old
java.util.zip.ZipException: Not in GZIP format
at java.util.zip.GZIPInputStream.readHeader(GZIPInputStream.java:165) ~[?:1.8.0_25]
at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:79) ~[?:1.8.0_25]
at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:91) ~[?:1.8.0_25]
at ea.a(SourceFile:24) ~[1.10.2.jar:?]
at azz.a(SourceFile:82) [1.10.2.jar:?]
at azz.c(SourceFile:74) [1.10.2.jar:?]
at azw.b(SourceFile:57) [1.10.2.jar:?]
at big.e(SourceFile:35) [1.10.2.jar:?]
at big.<init>(SourceFile:28) [1.10.2.jar:?]
at bie.b(SourceFile:43) [1.10.2.jar:?]
at bft.a(SourceFile:372) [1.10.2.jar:?]
at bcx.a(SourceFile:900) [1.10.2.jar:?]
at bga.a(SourceFile:237) [1.10.2.jar:?]
at bft.a(SourceFile:346) [1.10.2.jar:?]
at bga.a(SourceFile:498) [1.10.2.jar:?]
at bft.k(SourceFile:409) [1.10.2.jar:?]
at bft.p(SourceFile:386) [1.10.2.jar:?]
at bcx.t(SourceFile:1586) [1.10.2.jar:?]
at bcx.av(SourceFile:968) [1.10.2.jar:?]
at bcx.a(SourceFile:396) [1.10.2.jar:?]
at net.minecraft.client.main.Main.main(SourceFile:124) [1.10.2.jar:?]
[19:55:09] [Client thread/INFO]: Stopping!
[19:55:09] [Client thread/INFO]: SoundSystem shutting down...
[19:55:09] [Client thread/WARN]: Author: Paul Lamb, www.paulscode.com
Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future releaseRelated issues
Comments
[Mod] Neko
migrated
I have edited the issue and attached the game output. About a third of the way down it says it has an error loading the world, named Steam skies. I haven't put the saved flashdrive version in yet either. Also thank you for the fast response!
migrated
Are there any mods that could answer why it is happening, instead of linking to "duplicates" without giving any explanations? This support page is seeming more and more a waste of my time by the second.
[Mod] Neko
This is not a support page; this is a bug tracker. You can use the links below.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki
Please attach the complete output of the "Game Output (Your Minecraft name) " which can be found on the fourth tab of the launcher to this ticket.
If the launcher closes after game start, please edit your profile and select "Launcher visibility" then, "Keep the launcher open".