PaperMC / PaperMC/Paper

Moonrise main thread check fails on shutdown

Open
#12,506 2 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

resolution: awaiting response version: 1.21.5
Dominant language
Java
Stars
12.7k
Forks
3.5k
Avg merge
3d 13h
Merged PRs (30d)
11

Description

Stack trace

https://mclo.gs/sGXRPhu

Plugin and Datapack List

Paper Plugins (10):
Characters, CityBuild, Commander, Economist, goPaintAdvanced, Protect, RedProtect, ServiceIO, Tweaks, Worlds
Bukkit Plugins (1):
FastAsyncWorldEdit

There are 3 data pack(s) enabled: [vanilla (built-in)], [file/bukkit (world)], [paper (built-in)]
There are no more data packs available

Actions to reproduce (if known)

Occurred randomly

Paper version

This server is running Paper version 1.21.5-54-main@835b955 (2025-05-01T01:47:51Z) (Implementing API version 1.21.5-R0.1-SNAPSHOT)

Other

No response

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the linked stack trace at https://mclo.gs/sGXRPhu and the reported Paper version 1.21.5-54. The issue provides no source file or test entry point, so trace the shutdown path associated with the Moonrise main-thread check and determine how the random failure can be reproduced. Done means the shutdown failure is resolved and covered by an appropriate test or verified reproduction.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
backend, game-dev
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
35/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.