GTNH crashing because of java.lang.NullPointerException

[jgore077]

Your GTNH Discord Username

No response

Your Pack Version

2.6.1

Your Server

Minecraft Integrated Server

Java Version

Java 21

Type of Server

Single Player

Your Actions

I walked into a new chunk then the game crashed because of a java.lang.NullPointerException.

Crash Report

crash-2024-08-15_11.16.28-server.txt

Final Checklist

• [X] I have searched this issue tracker and there is nothing similar already. Posting on a closed issue saying the crash still exists will prompt us to investigate and reopen it once we confirm your report.
• [X] I can reproduce this crash consistently by following the exact steps I described above.
• [x] I have asked other people and they confirm they also crash by following the exact steps I described above.

[jgore077]

To add a note here: It seems like many of the chunks in my world are corrupted because as soon as walk into them GT:NH crashes with the same error.

[jgore077]

I believe I have fixed the issue by utilizing this tool. I will close this issue in 24hrs from now if I don't have any persisting issues.

I can walk around in without crashing but I couldn't replace the chunks bc I had deleted my my oldest backups. So I just deleted the chunks with this command after cloning the repo.

python regionfixer.py -p 4 --delete-corrupted "path/to/save"

Which gave this output

Welcome to Region Fixer!
(v 0.3.6)

############################################################
#############  Scanning world: My World  ##############
############################################################

World info:
 - 42 region/level files,
 - 0 POI files,
 - 0 entities files,
 - 1 player files,
 - and 52 data files.

-------------------- Checking level.dat --------------------
'level.dat' is readable

---------------- Scanning UUID player files ----------------
1 of 1|##########################################################|Time: 0:00:00

------------- Scanning old format player files -------------
Info: No files to scan.

---------- Scanning structures and map data files ----------
52 of 52|########################################################|Time: 0:00:00

--------- Scanning region, POI and entities files ----------
42 of 42|########################################################|Time: 0:00:37

############################################################
############# Scan results for: My World ##############
############################################################

Unreadable player files:
No problems found.

Unreadable data files:
No problems found.

Chunk problems:
------------------------------
| Problem | Corrupted  Total |
------------------------------
|  Count  |    212     12400 |
------------------------------

Region problems:
No problems found.

########## Deleting chunks with status: Corrupted ##########
 Deleting chunks in regionset "Level/Region files for Overworld":
Removed 212 chunks in this regionset.

 Deleting chunks in regionset "Level/Region files for The End":
Removed 0 chunks in this regionset.

 Deleting chunks in regionset "Level/Region files for "DIM112"":
Removed 0 chunks in this regionset.

 Deleting chunks in regionset "Level/Region files for "DIM64"":
Removed 0 chunks in this regionset.

Deleted 212 chunks with status: Corrupted

As you can see 212 chunks were corrupted which would cause my game to crash as soon as I walked into them. If you are going to apply this solution to your world be careful and make sure you have a backup.