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:
376e37db SPIGOT-7677: Update which entities are marked as spawnable
06c4add3 SPIGOT-7737: Add separate TreeType.MEGA_PINE
19b7caaa SPIGOT-7731: Spawn eggs cannot have damage
e585297e PR-1022: Add force option to Player#spawnParticle
d26e0094 PR-1018: Add methods to get players seeing specific chunks
8df1ed18 PR-978: Add Material#isCompostable and Material#getCompostChance
4b9b59c7 SPIGOT-7676: Enforce locale parameter in toLowerCase and toUpperCase method calls and always use root locale
8d1e700a PR-1020: Cast instead of using #typed when getting BlockType and ItemType to better work with testing / mocks
fa28607a PR-1016: Fix incorrect assumption of Fireball having constant speed
4c6c8586 PR-1015: Add a tool component to ItemMeta
6f6b2123 PR-1014: Add PotionEffectTypeCategory to distinguish between beneficial and harmful effects
f511cfe1 PR-1013, SPIGOT-4288, SPIGOT-6202: Add material rerouting in preparation for the switch to ItemType and BlockType
def44cbf SPIGOT-7669: Fix typo in ProjectileHitEvent#getHitBlockFace documentation
53fa4f72 PR-1011: Throw an exception if a RecipeChoice is ever supplied air
CraftBukkit Changes:
ee95e171a SPIGOT-7737: Add separate TreeType.MEGA_PINE
0dae4c62c Fix spawn egg equality check and copy constructor
ab59e847c Fix spawn eggs with no entity creating invalid stacks and disconnect creative clients
3b6093b28 SPIGOT-7736: Creative spawn egg use loses components
c6b4d5a87 SPIGOT-7731: Spawn eggs cannot have damage
340ccd57f SPIGOT-7735: Fix serialization of player heads with note block sound
fd2f41834 SPIGOT-7734: Can't register a custom advancement using unsafe()
02456e2a5 PR-1413: Add force option to Player#spawnParticle
6a61f38b2 SPIGOT-7680: Per-world weather command
58c41cebb PR-1409: Add methods to get players seeing specific chunks
16c976797 PR-1412: Fix shipwreck loot tables not being set for BlockTransformers
7189ba636 PR-1360: Add Material#isCompostable and Material#getCompostChance
900384556 SPIGOT-7676: Enforce locale parameter in toLowerCase and toUpperCase method calls and always use root locale
bdb40c5f1 Increase outdated build delay
d6607c7dd SPIGOT-7675: Fix FoodComponent config deserialization
b148ed332 PR-1406: Fix incorrect assumption of Fireball having constant speed
3ec31ca75 PR-1405: Add a tool component to ItemMeta
5d7d675b9 PR-1404: Add PotionEffectTypeCategory to distinguish between beneficial and harmful effects
960827981 PR-1403, SPIGOT-4288, SPIGOT-6202: Add material rerouting in preparation for the switch to ItemType and BlockType
94e44ec93 PR-1401: Add a config option to accept old keys in registry get calls
a43701920 PR-1402: Fix ChunkSnapshot#isSectionEmpty() is always false
87d0a3368 SPIGOT-7668: Move NONE Registry updater to FieldRename to avoid some class loader issues
2ea1e7ac2 PR-1399: Fix regression preventing positive .setDamage value from causing knockback for 0 damage events
ba2d49d21 Increase outdated build delay
Spigot Changes:
fcd94e21 Rebuild patches
342f4939 SPIGOT-7661: Add experimental unload-frozen-chunks option
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.
