Ian Truong

Is there not a way to prevent this?

Completely ignored arguments: [--nativeLauncherVersion, 286]
[09:03:25] [Client thread/INFO]: Setting user: QuestionTues_FTW
[09:03:25] [Client thread/INFO]: (Session ID is token:47a862c3f6534b6faf2a12856a741014:5a11c5427af44e118e3f0c9db49cda19)
[09:03:28] [Client thread/INFO]: LWJGL Version: 2.9.4
[09:03:29] [Client thread/INFO]: Reloading ResourceManager: Default
[09:03:31] [Sound Library Loader/INFO]: Starting up SoundSystem...
[09:03:31] [Thread-6/INFO]: Initializing LWJGL OpenAL
[09:03:31] [Thread-6/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[09:03:33] [Thread-6/INFO]: OpenAL initialized.
[09:03:33] [Sound Library Loader/INFO]: Sound engine started
[09:03:49] [Client thread/INFO]: Created: 512x512 textures-atlas
[09:05:11] [Client thread/ERROR]: Exception reading C:\Users\Ian\AppData\Roaming\.minecraft\saves\damn it\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 dx.a(SourceFile:13) ~[1.8.8.jar:?]
at atn.c(SourceFile:62) [1.8.8.jar:?]
at atk.b(SourceFile:52) [1.8.8.jar:?]
at axv.f(SourceFile:87) [1.8.8.jar:?]
at axv.b(SourceFile:59) [1.8.8.jar:?]
at axu.a(SourceFile:376) [1.8.8.jar:?]
at ave.a(SourceFile:819) [1.8.8.jar:?]
at aya.a(SourceFile:215) [1.8.8.jar:?]
at axu.a(SourceFile:350) [1.8.8.jar:?]
at aya.a(SourceFile:468) [1.8.8.jar:?]
at axu.k(SourceFile:413) [1.8.8.jar:?]
at axu.p(SourceFile:390) [1.8.8.jar:?]
at ave.s(SourceFile:1498) [1.8.8.jar:?]
at ave.av(SourceFile:889) [1.8.8.jar:?]
at ave.a(SourceFile:325) [1.8.8.jar:?]
at net.minecraft.client.main.Main.main(SourceFile:124) [1.8.8.jar:?]
[09:05:13] [Server thread/INFO]: Starting integrated minecraft server version 1.8.8
[09:05:13] [Server thread/INFO]: Generating keypair
java.util.zip.ZipException: Not in GZIP format
at java.util.zip.GZIPInputStream.readHeader(GZIPInputStream.java:165)
at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:79)
at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:91)
at dx.a(SourceFile:13)
at aua.a(SourceFile:43)
at le.b(SourceFile:127)
at bpo.a(SourceFile:96)
at bpo.i(SourceFile:128)
at net.minecraft.server.MinecraftServer.run(SourceFile:421)
at java.lang.Thread.run(Thread.java:745)
java.util.zip.ZipException: Not in GZIP format
at java.util.zip.GZIPInputStream.readHeader(GZIPInputStream.java:165)
at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:79)
at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:91)
at dx.a(SourceFile:13)
at aua.a(SourceFile:43)
at kz.b(SourceFile:70)
at bpo.a(SourceFile:100)
at bpo.i(SourceFile:128)
at net.minecraft.server.MinecraftServer.run(SourceFile:421)
at java.lang.Thread.run(Thread.java:745)
java.util.zip.ZipException: Not in GZIP format
at java.util.zip.GZIPInputStream.readHeader(GZIPInputStream.java:165)
at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:79)
at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:91)
at dx.a(SourceFile:13)
at aua.a(SourceFile:43)
at kz.b(SourceFile:70)
at bpo.a(SourceFile:100)
at bpo.i(SourceFile:128)
at net.minecraft.server.MinecraftServer.run(SourceFile:421)
at java.lang.Thread.run(Thread.java:745)
[09:05:13] [Server thread/INFO]: Preparing start region for level 0
[09:05:14] [Server thread/INFO]: Preparing spawn area: 32%
[09:05:15] [Server thread/INFO]: Changing view distance to 12, from 10
[09:05:16] [Server thread/INFO]: QuestionTues_FTW[local:E:cdf989e6] logged in with entity id 254 at (805.755717162518, 48.0, -92.69999998807906)
[09:05:16] [Server thread/INFO]: QuestionTues_FTW joined the game
[09:05:17] [Server thread/ERROR]: Chunk file at 49,-3 is in the wrong location; relocating. (Expected 49, -3, got 50, -4)
[09:05:17] [Server thread/ERROR]: Chunk file at 50,-11 is in the wrong location; relocating. (Expected 50, -11, got 51, -2)
[09:05:18] [Server thread/WARN]: Wrong location! (51, -2) should be (50, -11), we['Zombie'/385, l='More Fish', x=825.50, y=13.00, z=-29.50]
[09:05:18] [Server thread/ERROR]: Chunk file at 50,-4 is in the wrong location; relocating. (Expected 50, -4, got 54, -10)
[09:05:18] [Server thread/WARN]: Wrong location! (54, -10) should be (50, -4), we['Zombie'/396, l='More Fish', x=875.50, y=38.00, z=-147.50]
[09:05:18] [Server thread/WARN]: Wrong location! (54, -10) should be (50, -4), we['Zombie'/397, l='More Fish', x=874.75, y=38.00, z=-144.71]
[09:05:18] [Server thread/ERROR]: Chunk file at 51,-2 is in the wrong location; relocating. (Expected 51, -2, got 50, -3)
[09:05:18] [Server thread/ERROR]: Chunk file at 54,-11 is in the wrong location; relocating. (Expected 54, -11, got 49, -3)
[09:05:18] [Server thread/WARN]: Wrong location! (49, -3) should be (54, -11), we['Zombie'/473, l='More Fish', x=788.50, y=27.00, z=-44.50]
[09:05:18] [Server thread/WARN]: Wrong location! (49, -3) should be (54, -11), tv['Sheep'/474, l='More Fish', x=799.02, y=67.00, z=-34.95]
[09:05:18] [Server thread/WARN]: Wrong location! (49, -3) should be (54, -11), tn['Chicken'/475, l='More Fish', x=790.36, y=65.00, z=-46.58]
[09:05:18] [Server thread/WARN]: Wrong location! (49, -3) should be (54, -11), uz['item.item.egg'/476, l='More Fish', x=790.53, y=65.00, z=-46.17]
[09:05:18] [Server thread/ERROR]: Chunk file at 54,-10 is in the wrong location; relocating. (Expected 54, -10, got 55, -5)
[09:05:18] [Server thread/WARN]: Wrong location! (55, -5) should be (54, -10), vo['Enderman'/478, l='More Fish', x=895.50, y=20.00, z=-66.50]
[09:05:18] [Server thread/ERROR]: Chunk file at 54,-6 is in the wrong location; relocating. (Expected 54, -6, got 56, -10)
[09:05:18] [Server thread/WARN]: Wrong location! (56, -10) should be (54, -6), vn['Creeper'/489, l='More Fish', x=907.50, y=30.00, z=-148.50]
[09:05:18] [Server thread/WARN]: Wrong location! (56, -10) should be (54, -6), vn['Creeper'/490, l='More Fish', x=906.50, y=30.00, z=-149.50]
[09:05:18] [Server thread/WARN]: Wrong location! (56, -10) should be (54, -6), vn['Creeper'/491, l='More Fish', x=906.50, y=30.00, z=-148.50]
[09:05:18] [Server thread/WARN]: Wrong location! (56, -10) should be (54, -6), vn['Creeper'/492, l='More Fish', x=911.50, y=30.00, z=-150.50]
[09:05:18] [Server thread/WARN]: Wrong location! (56, -10) should be (54, -6), tn['Chicken'/493, l='More Fish', x=899.33, y=62.67, z=-150.12]
[09:05:18] [Server thread/WARN]: Wrong location! (56, -10) should be (54, -6), tn['Chicken'/494, l='More Fish', x=903.54, y=62.59, z=-145.42]
[09:05:18] [Server thread/WARN]: Wrong location! (56, -10) should be (54, -6), uz['item.item.egg'/495, l='More Fish', x=903.21, y=61.00, z=-144.42]
[09:05:19] [Server thread/ERROR]: Chunk file at 56,-10 is in the wrong location; relocating. (Expected 56, -10, got 57, -10)
[09:05:19] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 3836ms behind, skipping 76 tick(s)
[09:05:20] [Server thread/INFO]: Saving and pausing game...
[09:05:20] [Server thread/INFO]: Saving chunks for level 'More Fish'/Overworld
[09:05:21] [Server thread/INFO]: Saving chunks for level 'More Fish'/Nether
[09:05:21] [Server thread/INFO]: Saving chunks for level 'More Fish'/The End
[09:05:52] [Server thread/INFO]: Saving and pausing game...
[09:05:52] [Server thread/INFO]: Saving chunks for level 'More Fish'/Overworld
[09:05:52] [Server thread/INFO]: Saving chunks for level 'More Fish'/Nether
[09:05:52] [Server thread/INFO]: Saving chunks for level 'More Fish'/The End
[09:06:12] [Server thread/INFO]: [QuestionTues_FTW: Set own game mode to Spectator Mode]
[09:06:12] [Client thread/INFO]: [CHAT] Your game mode has been updated
[09:06:28] [Server thread/INFO]: Saving and pausing game...
[09:06:28] [Server thread/INFO]: Saving chunks for level 'More Fish'/Overworld
[09:06:28] [Server thread/INFO]: Saving chunks for level 'More Fish'/Nether
[09:06:28] [Server thread/INFO]: Saving chunks for level 'More Fish'/The End
[09:07:29] [Server thread/INFO]: [QuestionTues_FTW: Set own game mode to Survival Mode]
[09:07:29] [Client thread/INFO]: [CHAT] Your game mode has been updated
[09:07:32] [Client thread/INFO]: [CHAT] Saved screenshot as 2015-09-22_09.07.32.png
[09:07:35] [Server thread/INFO]: Saving and pausing game...
[09:07:35] [Server thread/INFO]: Saving chunks for level 'More Fish'/Overworld
[09:07:35] [Server thread/INFO]: Saving chunks for level 'More Fish'/Nether
[09:07:35] [Server thread/INFO]: Saving chunks for level 'More Fish'/The End
[09:07:38] [Client thread/INFO]: [CHAT] Saved screenshot as 2015-09-22_09.07.38.png
[09:07:39] [Server thread/INFO]: Saving and pausing game...
[09:07:40] [Server thread/INFO]: Saving chunks for level 'More Fish'/Overworld
[09:07:40] [Server thread/INFO]: Saving chunks for level 'More Fish'/Nether
[09:07:40] [Server thread/INFO]: Saving chunks for level 'More Fish'/The End
java.io.IOException: Stream Closed
at java.io.RandomAccessFile.seek0(Native Method)
at java.io.RandomAccessFile.seek(RandomAccessFile.java:540)
at anh.a(SourceFile:315)
at anh.a(SourceFile:255)
at anh$a.close(SourceFile:236)
at java.util.zip.DeflaterOutputStream.close(DeflaterOutputStream.java:241)
at java.io.FilterOutputStream.close(FilterOutputStream.java:159)
at anj.b(SourceFile:140)
at anj.c(SourceFile:124)
at auc.c(SourceFile:37)
at auc.run(SourceFile:30)
at java.lang.Thread.run(Thread.java:745)
[09:07:40] [Server thread/INFO]: Stopping server
[09:07:40] [Server thread/INFO]: Saving players
[09:07:40] [Server thread/INFO]: Saving worlds
[09:07:40] [Server thread/INFO]: Saving chunks for level 'More Fish'/Overworld
[09:07:40] [Server thread/INFO]: Saving chunks for level 'More Fish'/Nether
[09:07:40] [Server thread/INFO]: Saving chunks for level 'More Fish'/The End
[09:08:06] [Client thread/INFO]: Stopping!
[09:08:06] [Client thread/INFO]: SoundSystem shutting down...
[09:08:06] [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 release

This happens rarely, however it seems that terrain also keeps changing after I log off and relog.