Exception when loading some old maps
Open
Nobody has claimed this yet.
status: needs triage
version: 1.21.5
- Dominant language
- Java
- Stars
- 12.7k
- Forks
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- Avg merge
- 3d 13h
- Merged PRs (30d)
- 11
Description
Expected behavior
The map should load
Observed/Actual behavior
Exception: https://cpaste.de/raw/daraxareya
Steps/models to reproduce
- Add this map to your server (the exception is happening with many maps on our server but not all): https://webinterface.cubeside.de/temp/map_5423.dat
- Use the code mentioned here to load the map: https://cpaste.de/raw/daraxareya
- Join the server
- Exception: https://cpaste.de/raw/daraxareya
Plugin and Datapack List
just a test plugin
Paper version
This server is running Paper version 1.21.5-87-main@fa360aa (2025-05-18T22:35:50Z) (Implementing API version 1.21.5-R0.1-SNAPSHOT)
You are running the latest version
Other
No response
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the failure with map_5423.dat and the loading code from the linked cpaste, using Paper 1.21.5-87. Inspect the linked exception output and compare it with a map that loads successfully; done means the supplied old map and other affected maps load without the exception.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java
- Domain
- backend
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100