Bug Report

World corrupted after one 2 hour play session, server now crashes any time you attempt to join unless we generate a new world

Expected Behaviour

Server staying up and being playable

Possible Solution

Generating new world

Steps to Reproduce (for bugs)

1. Joining server with any account

Logs

• Crash Log: https://pastebin.com/XT03qtki

Client Information

• Modpack Version: 3.1.2 Hotfix 1
• Java Version: Version 8 Update 211
• Launcher Used: Twitch
• Memory Allocated: 8 GB
• Server/LAN/Single Player: Server
• Optifine Installed: Yes
• Shaders Enabled: Yes

World Information

• Modpack Version world created in: 3.1.2

• Additional Content Installed: Only clientside Optifine (Disabling Optifine doesn't solve the issue)

Server Information

• Java Version: Version 8 Update 211
• Operating System: Windows 10
• Hoster/Hosting Solution: Hosted on my own computer
• Sponge (Non-Vanilla Forge) Server: Unsure, I used the server download on the Twitch launcher

Unfortunately this is an issue that can happen with any minecraft server, particularly if you're using older hard drives to store your world on which can be more prone to write errors. There are utilities that can help you determine your drive's health.

Always shut down your server properly using the /stop command.

Without numerous people experiencing similar issues, it is unlikely to be an issue with a mod storing invalid NBT data.

We do include a backup mod, you should try restoring your most recent backup before outright starting a new world.