Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing
Bukkit Changes:
9a294519 SPIGOT-7533, 943: Add missing Poses for 1.20.3
be2884c4 Add unique ID to PlayerResourcePackStatusEvent
d9c1eb83 Add additional @MinecraftExperimental annotations
68f5bb6a SPIGOT-7526: Add missing PlayerResourcePackStatusEvent statuses
CraftBukkit Changes:
368c48be1 Fix formatting issue in previous commit
da8f91f31 SPIGOT-7534: Error when chunk with decorated pot trying to save
d20c9291a SPIGOT-7532: Entity#isValid() returns false after server restart
ec1fa2ead PR-1309: Add tests for Bukkit Pose
5a7080b58 Add unique ID to PlayerResourcePackStatusEvent
0fd734950 SPIGOT-7528: Fix certain custom shaped recipes
Patch documentation to come
Issues with the old system that are fixed now:
- World generation does not scale with cpu cores effectively.
- Relies on the main thread for scheduling and maintaining chunk state, dropping chunk load/generate rates at lower tps.
- Unreliable prioritisation of chunk gen/load calls that block the main thread.
- Shutdown logic is utterly unreliable, as it has to wait for all chunks to unload - is it guaranteed that the chunk system is in a state on shutdown that it can reliably do this? Watchdog shutdown also typically failed due to thread checks, which is now resolved.
- Saving of data is not unified (i.e can save chunk data without saving entity data, poses problems for desync if shutdown is really abnormal.
- Entities are not loaded with chunks. This caused quite a bit of headache for Chunk#getEntities API, but now the new chunk system loads entities with chunks so that they are ready whenever the chunk loads in. Effectively brings the behavior back to 1.16 era, but still storing entities in their own separate regionfiles.
The above list is not complete. The patch documentation will complete it.
New chunk system hard relies on starlight and dataconverter, and most importantly the new concurrent utilities in ConcurrentUtil.
Some of the old async chunk i/o interface (i.e the old file io thread reroutes _some_ calls to the new file io thread) is kept for plugin compat reasons. It will be removed in the next major version of minecraft.
The old legacy chunk system patches have been moved to the removed folder in case we need them again.
