Chunk Generation was occuring while inside of the progressCache lock
this caused the progressCache to stay blocked for a long period of time
which then blocked main when main needed to clean the expiring map.
We now maintain a separate map for pending scheduler entries, that
we can join on if a 2nd request comes in while one is starting.
This strategy keeps the lock only for a fraction of time but
maintains thread safety.
So now the chunk is generated without holding a lock and wont
block the main thread on the expiring map as we will insert it
once ready.
1) Removed "Regen" mode of Dupe UUID resolver, forced safe.
Some servers who updated before we had safe mode added still had this value.
There's really no reason to keep this mode, as we've seen that vanilla
triggers this often and 99.9999999% of cases will be an actual duplicate
that needs to be deleted.
2) Made Vanilla Debug messages about dupe UUIDs and dupe uuid resolve messages
only show up if the debug.entities flag is on. This will stop server owners
from panicing from seeing these logs, and stop opening bug reports on this,
only for us to tell you "don't worry about it".
3) Avoid adding entities to world that are already added to world.
This can be triggered by anything that causes an entity to be added
to the world during the chunk load process, such as chunk conversions.
Issue #1544 was a case of this.
4) Removed debug warning about ExpiringMap.
Nothing more I know to do about this anyways. We recover from it,
stop warning to reduce noise of issues to us.
This will improve queue times by canceling chunks when a player
leaves the radius of an async loading/generating chunk.
This matches behavior we had pre 1.13 for loading too.
improved the water code so that immunity wont trigger if the entity
has the water pathfinder system active, so this improves support
for all entities that know how to behave in water.
Merged 2 EAR patches together, and removed an MCUtil method that
doesnt have a purpose anymore
2018-10-04 23:18:46 -04:00
Renamed from Spigot-Server-Patches/0377-Async-Chunk-Loading-and-Generation.patch (Browse further)
Aikar