My server crashed for Spongeforge

How to fix it??

---- Minecraft Crash Report ----

WARNING: coremods are present:
CTMCorePlugin (CTM-MC1.12.2-1.0.0.29.jar)
SpongeCoremod (spongeforge-1.12.2-2825-7.1.6.jar)
CXLibraryCore (cxlibrary-1.12.1-1.6.1.jar)
Contact their authors BEFORE contacting forge

// My bad.

Time: 11/5/19 9:40 PM
Description: Exception in server tick loop

java.lang.RuntimeException: derp
at net.minecraft.world.storage.SaveHandler.redirect$onLoadWorldInfo$bde000(SaveHandler.java:1073)
at net.minecraft.world.storage.SaveHandler.func_75757_d(SaveHandler.java:122)
at org.spongepowered.common.world.WorldManager.loadAllWorlds(WorldManager.java:732)
at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:3550)
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:270)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:486)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.RuntimeException: Attempt failed when reading Sponge level data for [Pixelmon 0] from file [level_sponge.dat]!
at net.minecraft.world.storage.SaveHandler.loadSpongeDatData(SaveHandler.java:618)
at net.minecraft.world.storage.SaveHandler.redirect$onLoadWorldInfo$bde000(SaveHandler.java:1071)
… 6 more
Caused by: java.util.zip.ZipException: Not in GZIP format
at java.util.zip.GZIPInputStream.readHeader(Unknown Source)
at java.util.zip.GZIPInputStream.(Unknown Source)
at java.util.zip.GZIPInputStream.(Unknown Source)
at net.minecraft.nbt.CompressedStreamTools.func_74796_a(CompressedStreamTools.java:26)
at net.minecraft.world.storage.SaveHandler.loadSpongeDatData(SaveHandler.java:615)
… 7 more

A detailed walkthrough of the error, its code path and all known details is as follows:

– Head –
Thread: Server thread
Stacktrace:
at net.minecraft.world.storage.SaveHandler.redirect$onLoadWorldInfo$bde000(SaveHandler.java:1073)
at net.minecraft.world.storage.SaveHandler.func_75757_d(SaveHandler.java:122)

– Sponge PhaseTracker –
Details:
Phase Stack: [Empty stack]
Stacktrace:
at net.minecraft.server.MinecraftServer.handler$onCrashReport$zjo000(MinecraftServer.java:3980)
at net.minecraft.server.MinecraftServer.func_71230_b(MinecraftServer.java:889)
at net.minecraft.server.dedicated.DedicatedServer.func_71230_b(DedicatedServer.java:371)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:558)
at java.lang.Thread.run(Unknown Source)

– System Details –
Details:
Minecraft Version: 1.12.2
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_221, Oracle Corporation
Java VM Version: Java HotSpot™ 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 4028621224 bytes (3841 MB) / 5530189824 bytes (5274 MB) up to 5530189824 bytes (5274 MB)
JVM Flags: 2 total; -Xms5500M -Xmx5500M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP 9.42 Powered by Forge 14.23.5.2838 28 mods loaded, 28 mods active
States: ‘U’ = Unloaded ‘L’ = Loaded ‘C’ = Constructed ‘H’ = Pre-initialized ‘I’ = Initialized ‘J’ = Post-initialized ‘A’ = Available ‘D’ = Disabled ‘E’ = Errored

| State  | ID                   | Version           | Source                                        | Signature                                |
|:------ |:-------------------- |:----------------- |:--------------------------------------------- |:---------------------------------------- |
| LCHIJA | minecraft            | 1.12.2            | minecraft.jar                                 | None                                     |
| LCHIJA | mcp                  | 9.42              | minecraft.jar                                 | None                                     |
| LCHIJA | FML                  | 8.0.99.99         | forge-1.12.2-14.23.5.2838-universal.jar       | e3c3d50c7c986df74c645c0ac54639741c90a557 |
| LCHIJA | forge                | 14.23.5.2838      | forge-1.12.2-14.23.5.2838-universal.jar       | e3c3d50c7c986df74c645c0ac54639741c90a557 |
| LCHIJA | spongeapi            | 7.1.0-fb496dbf0   | spongeforge-1.12.2-2825-7.1.6.jar             | None                                     |
| LCHIJA | sponge               | 1.12.2-7.1.6      | spongeforge-1.12.2-2825-7.1.6.jar             | None                                     |
| LCHIJA | spongeforge          | 1.12.2-2825-7.1.6 | spongeforge-1.12.2-2825-7.1.6.jar             | None                                     |
| LCHIJA | biomesoplenty        | 7.0.0.2291        | BiomesOPlenty-1.12-7.0.0.2291-universal.jar   | None                                     |
| LCHIJA | codechickenlib       | 3.2.2.353         | CodeChickenLib-1.12.2-3.2.2.353-universal.jar | f1850c39b2516232a2108a7bd84d1cb5df93b261 |
| LCHIJA | chickenchunks        | 2.4.1.71          | ChickenChunks-Mod-1.12-Latest.jar             | f1850c39b2516232a2108a7bd84d1cb5df93b261 |
| LCHIJA | jei                  | 4.15.0.291        | jei_1.12.2-4.15.0.291.jar                     | None                                     |
| LCHIJA | chisel               | MC1.12.2-1.0.1.44 | Chisel-MC1.12.2-1.0.1.44.jar                  | None                                     |
| LCHIJA | cxlibrary            | 1.6.1             | cxlibrary-1.12.1-1.6.1.jar                    | None                                     |
| LCHIJA | disenchanter         | 1.6               | disenchanter-[1.12]1.6 (1).jar                | None                                     |
| LCHIJA | pixelmon             | 7.0.8             | Pixelmon-1.12.2-7.0.8-universal.jar           | None                                     |
| LCHIJA | gameshark            | 5.2.1             | gameshark-1.12.2-5.2.1-universal.jar          | None                                     |
| LCHIJA | hopperducts          | 1.5               | hopperducts-mc1.12-1.5.jar                    | None                                     |
| LCHIJA | waila                | 1.8.26            | Hwyla-Mod-1.12.2.jar                          | None                                     |
| LCHIJA | ironchest            | 1.12.2-7.0.64.843 | ironchest-1.12.2-7.0.64.843.jar               | None                                     |
| LCHIJA | lucky                | 7.5.0             | LuckyBlock_1-12_v7-5-0.zip                    | None                                     |
| LCHIJA | morefurnaces         | 1.10.5            | More-Furnaces-Mod-1.12.2.jar                  | None                                     |
| LCHIJA | oretweaker           | 1.0.2-1.12.0      | Ore+Tweaker-1.0.2-1.12.0.jar                  | None                                     |
| LCHIJA | orecore              | 1.3.6             | Ore-Core-Mod-1.12.2.jar                       | None                                     |
| LCHIJA | oreexcavation        | 1.4.140           | OreExcavation-1.4.140.jar                     | None                                     |
| LCHIJA | pixelextras          | 2.5.1             | PixelExtras-1.12.2-2.5.1-universal.jar        | None                                     |
| LCHIJA | pokelucky            | 3.9.1             | pokelucky-3.9.1(1.12.2).jar                   | None                                     |
| LCHIJA | repairgem            | 1.3.0             | RepairGem-1.12.2-1.3.0.jar                    | None                                     |
| LCHIJA | zevac.survivalflight | 0.1.11            | Survival-Flight-Mod-1.12.2.jar                | None                                     |

Loaded coremods (and transformers): 

CTMCorePlugin (CTM-MC1.12.2-1.0.0.29.jar)
team.chisel.ctm.client.asm.CTMTransformer
SpongeCoremod (spongeforge-1.12.2-2825-7.1.6.jar)
org.spongepowered.common.launch.transformer.SpongeSuperclassTransformer
CXLibraryCore (cxlibrary-1.12.1-1.6.1.jar)
cubex2.cxlibrary.CoreModTransformer
Profiler Position: N/A (disabled)
Player Count: 0 / 10; []
Is Modded: Definitely; Server brand changed to ‘fml,forge,sponge’
Type: Dedicated Server (map_server.txt)

Next time please read “Common Crash Issues”

As for your current error.

Caused by: java.lang.RuntimeException: Attempt failed when reading Sponge level data for [Pixelmon 0] from file [level_sponge.dat]!

Have you got a backup of the world to replace this file with?

This has been happening occasionally for a while, and we’ve never figured out the root cause. If you have them, could you upload a few of your recent logs from right before the crash started occurring? They might have some information that would help us solve this. (Specifically, I’m wondering if there’s something that happens when the server shuts down that only causes a crash when it starts back up.)

In the meantime, you can get your server to start again by replacing the level_sponge.dat file. If you have a backup, I’d recommend using that; otherwise, it’s fine to delete it completely and let the server recreate it.