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MC-195596

Exception generating new chunk: java.util.ConcurrentModificationException

While generating new chunks on a server the following exception crashed the server. The only artifact I could find is a tree that I had previously planted sapplings for, floating 2 blocks above the ground.

Environment

Minecraft Version: 1.16.1
Minecraft Version ID: 1.16.1
Operating System: Windows 10 (amd64) version 10.0
Java Version: 11.0.1, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 617588960 bytes (588 MB) / 1073741824 bytes (1024 MB) up to 1073741824 bytes (1024 MB)
CPUs: 8
JVM Flags: 2 total; -Xmx1024M -Xms1024M
Player Count: 1 / 5; [ze['Tofun'/87, l='ServerLevel[world]', x=175.57, y=63.00, z=-262.10]]
Data Packs: vanilla
Is Modded: Unknown (can't tell)
Type: Dedicated Server (map_server.txt)

Linked issues

Attachments

Comments 6

Please provide the full crash log as a file.

Hi there!

Are you using any datapacks or resource packs? Did you experience this in a pure vanilla environment (not Optifine, etc.)?

I haven't installed any mods or datapacks, neither on the server, nor on the client.

What version of Java are you using? If it's Java 11 or above, you may have run into MC-149777.

migrated

(Unassigned)

Unconfirmed

1.16.1

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