Going to certain chunks crashes the entire server.

[honest rain]

Tested with chunky as well as going to the coordinates chunky specifics as having issues. Was chatting with the chunky dev last night and he said it was an issue with world generation/world seed I'm using so figured I'd post a bug report here. It always leads to a time out waiting for world statistics. I was able to fix it the first time by manually replacing the problem chunks with MCA Selector but I don't want to have to do that for every single problem chunk because it appears that there's many of them.

[analog sluice]

did you figure out what is causing the issue? is it a mod we can just uninstall?

[honest rain]

I have no idea what is causing the issue that's why I'm posting here lol

I am only using chunky as a third party mod and the chunky developer told me it appears to be a modpack chunk generation issue

[analog sluice]

Haha thanks hopefully we get a response.

[cunning kraken]

i've got no idea. it's whatever's trying to generate at chunk -263, 500 (xz -4208, 8000, roughly if I know my chunks correctly) and. It Just Doesn't Want To

[honest rain]

Yeah I was talking to the chunky dev as well and he said he couldn't find a specific mod that was causing the issue either, recommended removing lithium and starlight temporarily which I did but to no help.

I might just have to world edit those chunks out manually which I really wanted to avoid doing

[honest rain]

bumping again to see if anyone has any ideas, been scratching my head trying to figure this out

can't get further than a 6k radius in chunky without my server crashing and I'd really like to do a 20k radius as players who play on my server love exploration

[honest rain]

new crash report for another chunk that crashes my whole server when visited in game

[rich cedar]

Likely a structure or structure map in a chest loot table. Disabling the watchdog in the server properties or increasing the timeout should allow it to generate.
SomethingTimeout=60000
Change that to -1 to disable or to like 360000 for 6 minutes.

[honest rain]

These crashes happen with a timeout of -1

Server just refuses to crash after 10+ minutes giving my fail to get world statistics until I forcefully reload it

[rich cedar]

Then seed and the coords of chunks?

[honest rain]

I’m not 100% as to the seed as I’m away from my PC at the moment but I’ll link you both when I get to my PC in a bit

Appreciate the help

[rich cedar]

You can also check yourself in single player. But I'm guessing it's a When Dungeons Arise structure.

[honest rain]

Seed is: -5599530425004501210

Co-ords are: 8064, -2912

[honest rain]

Check in single player just by moving the world folder over right? Would that not cause the same crash cause it’s still operating on an internal server

[rich cedar]

Single player for some reason never seems to crash from this issue. Just takes a while to load. So yes you could copy the world folder, but it's likely a large amount of data. So you can just create a new world with the same seed and tp to that area. Whatever structure is there will be in close proximity to the one on the server world.

[honest rain]

I’ll give that a try later today once I’m off work, let you know how it goes.

[honest rain]

Was able to throw my server world file into a SP world and it won't even let me load into the world for some reason. It still says timed out waiting for world statistics in my ATLauncher console

a bunch of these errors in the ATLauncher console as well

[11/04/2023 15:21:05 PM] [Server thread/ERROR] (Repurposed Structures POOL MERGER) Found an entry in repurposed_structures:villages/ocean/houses that points to the non-existent nbt file called chefsdelight:villages/ocean/chef_house

not sure if that helps

[rich cedar]

hmm... @still wolf any clue one this?

[still wolf]

That would not cause deadlock

You would need thread dump

[honest rain]

Not sure what a thread dump is but I'd be happy to provide one if you tell me how to get one

[rich cedar]

ah ok so just a warning then. I did notice that you are pointing to this file that you are not adding though

[rich cedar]

If you could either upload the world, and/or get the seed with /seed I can try it on my computer to better debug it

[honest rain]

Seed is: -5599530425004501210 straight from my server console

and the coords that crash me are: 8064, -2912

[rich cedar]

thanks

[still wolf]

Remove lithium. Does issue still occur?

[honest rain]

It does unfortunately, that was the first thing the chunky dev suggested which is what I tried first, removed starlight too under his suggestion but still crashed in the same area

[still wolf]

The watchdog crashes truncates the threads too short before it can actually show what is truly running on each thread

————
if the crash is now reproduceble, that could be a good sign for getting a thread dump to happen with VisualVM but that's a bit more tricky to setup and get working. VisualVM lets you do a thread dump as soon as you notice the server is stuck. But some people had trouble setting it up to detect Minecraft tho
https://visualvm.github.io/download.html

https://streamable.com/n4hw6w

[honest rain]

yeah it's definitely reproducable, i get it about 5 times a night trying to troubleshoot it. I'll watch that video and download visualVM to try and get u a thread dump

I'm just glad I found the issue with chunky first before my players started exploring and may have gotten stuck near a crashing chunk

[rich cedar]

My hunch is a Dungeons Arise Explorer Map, because that's what its usually is. Although disabled the timeout normally works for that. So in case it is that, you could try adding this to the kubejs/data/ folder. unzipped of course. This replaces all of their explorer maps with stone, and will probably be added to the next pack update either way. Explorer maps are terrible things, because we have made these massive structures so rare, when one of these maps is in the loot, it tries to find one of their structures, which could literally be 6000+ (likely even more than that) blocks away.

[honest rain]

okay cool, i've been just fiddling with it a bit on my breaks so I'll throw that in the server and try visiting the same area again once I have more time. Thanks again for all your help and if this doesn't work I'll try and get that thread dump for ya

confirmed I still get a world statistics crash in SP as well, just loaded a blank world with the same seed and the world completely stops loading at those coords with a world stats crash in teh ATlauncher console

[rich cedar]

world stats just means it never finished loading.

[honest rain]

for 10+ minutes?

[rich cedar]

well yeah, something is stalling it out.

[honest rain]

got it got it, I think you're probably right with it being an explorer map

I was able to get closer in SP without it kicking me and it seems like there's a massive underground tunnel filled with drowners so probably related to dungeons arise after all

couldn't even see any structures when I was on the server cause it would just crash out almost immediately

[still wolf]

Ask Async Locator dev to port to fabric lol https://www.curseforge.com/minecraft/mc-mods/async-locator

If you see Structure Essentials mod recommended, do not use it. They try to speed up locating by checking for valid biomes for the structure at y = 0 which is incorrect and breaks locating in certain situations https://www.curseforge.com/minecraft/mc-mods/structure-essentials-forge-fabric/issues/3

[honest rain]

just tried that zip file and same thing

just ends up kicking everyone for time out and console reads time out waiting for world statistics yet again, guess I'll have to do that thread dump for ya

[rich cedar]

Ah k. I also am getting it to stop loading chunks in single player. No crash but the world just stops loading/ticking after it tries to load that area. Looking through the Region files, but that might not show anything because it probably stalls before its able to save to the region file.

[honest rain]

Yeah that's what happened to me in SP too, if you try and quit out now it'll just freeze the process

I was able to fix it once by manually copying a regions file over top the problem one but that leads to some really weird looking world generation so I'm trying to hopefully avoid that and also help everyone else not run into this issue

[rich cedar]

yeah, I have not actually seen it lock up like this before. Usually disabling the timeout or loading it in single player worked.

[honest rain]

Just my luck that it's the first modpack I've played in years lol, hope we're able to get this fixed cause I'd hate for this to happen to anyone else

[still wolf]

@rich cedar @honest rain I loaded up world with seed and coordinate and did the thread dump myself.

https://controlc.com/1809dda0

Take a look. It is happening when Repurposed Structures's Jungle Fortress spawns Drowned as part of worldgen. But look closer. It's not an issue with my mod. Someone mixin to Drowned spawning and added unsafe code that dies if ran during worldgen

at net.minecraft.entity.mob.DrownedEntity.handler$imb000$sihywtcamd$trySpawnAsGuardianJockey(DrownedEntity.java:1058)
Who the hell is this

[honest rain]

GuardianJockey…?

I’ve never even heard of that

[still wolf]

https://github.com/sf-inc/sihywtcamd/blob/c2648495d8c29ca7a7eb47bf26ef359538936846/src/main/java/com/github/galatynf/sihywtcamd/mixin/zombie/DrownedMixin.java#L52

Found repo

[honest rain]

Maybe disabling mob spawns might let the world gen do its thing? But if we turned mobs back on it would still probably crash when going back to that area

[still wolf]

https://github.com/sf-inc/sihywtcamd/issues/38

made issue report.

[still wolf]

disable guardianJockeySpawn in their config file should fix issue: ModConfig.get().zombie.drowned.guardianJockeySpawn

[honest rain]

that is awesome, I'm gonna give it a shot as soon as I have more time to troubleshoot. Just been doing this on work breaks and from what I had saved on my phone atm

[still wolf]

of course they might have more unsafe code that break so send me more coordiantes and seeds if issue persist and I'll tell you what else to disable

disable all their jockey configs

This looks like it'll do same thing for other mobs https://github.com/sf-inc/sihywtcamd/blob/c2648495d8c29ca7a7eb47bf26ef359538936846/src/main/java/com/github/galatynf/sihywtcamd/mixin/spider/CaveSpiderMixin.java#L33

[honest rain]

I've seen creepers riding slimes in some of the structures and that seems to work okay

not sure if that comes from the same mod

[still wolf]

full name of the mod: So I heard you were talking crap about Minecraft's difficulty ?
https://www.curseforge.com/minecraft/mc-mods/sihywtcamd

[honest rain]

might just end up removing the mod itself if changing the config doesn't fix it but I'll definitely be updating my bug report if I find anything else

Trying to pregen 20k radius with chunky when I found these problem chunks so if there's any more problem areas I'm sure I'll run into them

[rich cedar]

The downside of our servers being the same world for so long is that we don't run into world gen issues after mods get added. Also a nice upside too of course.

[still wolf]

when's next AoF update now Trent? lol

(lmk as I want to nerf my Sugar Water's speed at growing Sugar Cane. And let me know of any issues with my Bumblezone mod)

[honest rain]

just tested the fix and it 100% works with the config changed thanks again so much for your help

[still wolf]

fixed in v2 of datapack. I never made the ocean village pieces because some of farmer delight's blocks are not waterloggable

[cunning kraken]

+1 issue caused by sihywtcamd

[rich cedar]

This will also help with lockups
#all-of-fabric-6 message

[honest rain]

Pretty sure I grabbed this from you and already put it into my server from further up the thread, have you updated it at all? Haven’t had any server lockup issues since the config change as well as that file.

[honest rain]

This one right?

[rich cedar]

This is different. it upadtes all their .nbt structure files to 1.19.2

[honest rain]

Oh awesome okay, I’ll throw that in too after work then

[rich cedar]

https://github.com/Aureljz/WhenDungeonsArise--Fabric/issues/12

[honest rain]

So not sure what's going on here but I got a new crash report for ya, after adding that file to my server I seem unable to even load in. Last I loaded in I logged out in my base so not even sure why it's failing to load me in now.

[still wolf]

pehkui is having issues with hexal's wisps?

[honest rain]

managed to actually load in with a direct connection but now it's still just timing out waiting for world statistics again

I think I might just need to update Hexal

latest update has a fix for: Fixed Slipways spawning absurd numbers of wandering wisps if the wisps are in lazy chunks.

[honest rain]

okay thought that would've fixed it but apparently not, still get timed out as soon as I join the server. Not sure even how to diagnose this one because the server keeps running as long as no one joins. I do have a Kibe chunk loader at my base to keep my mana production going but I didn't log on for a couple days and now I can't even seem to log in.

[honest rain]

Also keep getting a warning in my server log that it's:

[18:20:37] [IO-Worker-22/WARN]: Saving oversized chunk [-106, 148] (1729373 bytes} to external file .\world\entities\c.-106.148.mcc

double checked and that chunk is 100% where my main base is

[honest rain]

so I found the problem lol

does anyone know how to forcefully despawn entities from the server console?