Paper 1.12.2 crash and hangs

[jiongjionger]

crash log: https://paste.ubuntu.com/p/zYd7cdRqQ8/
server version: paper 1.12.2 latest
bkcommonlib version: 1.16.4-v2
lightcleaner version: 1.16.4-v1

[Andre601]

Please, do everyone a favour and use https://paste.traincats.net to share errors.
Also, prove additional info such as servrr version, bkcommonlib version and lightcleaner version.

[bergerkiller]

Is auto cleaning enabled? Is it related to that or did you do a worldwide clean of sorts using commands?

[jiongjionger]

autoCleanEnabled: false
autoCleanWorldEditEnabled: true

There is a probability that this problem will occur when I use FAWE or use API calls LightingAutoClean.schedule(world, chunkX, chunkZ, 20).

[bergerkiller]

I think I know what this is. Give me a moment

[bergerkiller]

The core issue is that in light cleaner it performs some logic in parallel, and some code in bkcommonlib wasn't written with parallel (multithread) in mind. Give this a try to see if problems go away, if they don't, I might need to get rid of parallel() in light cleaner and read chunk data one 16x16x16 area of blocks at a time instead.

https://ci.mg-dev.eu/job/BKCommonLib/968/

[jiongjionger]

Thank you very much. I'll try it later.