See: https://gist.github.com/aikar/dd22bbd2a3d78a2fd3d92e95e9f28dc6
as part of post processing a chunk, we can call ChunkConverter.
ChunkConverter then kicks off major physics updates, and when blocks
that have connections across chunk boundries occur, a recursive risk
can occur where A updates a block that triggers a physics request.
That physics request may trigger a chunk request, that then enqueues
a task into the Mailbox ChunkTaskQueueSorter.
If anything requests that same chunk that is in the middle of conversion,
it's mailbox queue is going to be held up, so the subsequent chunk request
will be unable to proceed.
We delay post processing of Chunk.A() 1 "pass" by re stuffing it back into
the executor so that the mailbox ChunkQueue is now considered empty.
This successfully fixed a reoccurring and highly reproduceable crash
for heightmaps.
If the request to shut down the server is received while we are in
a watchdog hang, immediately treat it as a crash and begin the shutdown
process. Shutdown process is now improved to also shutdown cleanly when
not using restart scripts either.
If a server is deadlocked, a server owner can send SIGHUP (or any other signal
the JVM understands to shut down as it currently does) and the watchdog
will no longer need to wait until the full timeout, allowing you to trigger
a close process and try to shut the server down gracefully, saving player and
world data.
Previously there was no way to trigger this outside of waiting for a full watchdog
timeout, which may be set to a really long time...
Additionally, fix everything to do with shutting the server down asynchronously.
Previously, nearly everything about the process was fragile and unsafe. Main might
not have actually been frozen, and might still be manipulating state.
Or, some reuest might ask main to do something in the shutdown but main is dead.
Or worse, other things might start closing down items such as the Console or Thread Pool
before we are fully shutdown.
This change tries to resolve all of these issues by moving everything into the stop
method and guaranteeing only one thread is stopping the server.
We then issue Thread Death to the main thread of another thread initiates the stop process.
We have to ensure Thread Death propagates correctly though to stop main completely.
This is to ensure that if main isn't truely stuck, it's not manipulating state we are trying to save.
Also check class loader cache before locking to speed up cached hits to avoid the lock
wasn't gonna make a unique build just for that but can lump it in here.
Very few entities actually hard collide, so store them in their own
entity slices and provide a special getEntites type call just for them.
This reduces entity collision checking impact (in my testing) by 25%
for crammed entities (shove 130 cows into an 8x6 area in one chunk).
Less crammed entities are likely to show significantly less benefit.
Effectively, this patch optimises crammed entity situations.
A players previous block break location is held onto permanently, and if
an interact event is cancelled, the client sends a stop breaking block packet
This then tries to update client about that old location.
This old location might then be in a now unloaded chunk, and it caused it to load.
We now also clear reference to it once abort destroy block is ran to stop trying
to send updates about the old block anyways.
I had did a few of the operations myself, which would have broken chunkCheck
from doing it itself, which would leave some state left in the original chunk
and thats not good....
If the request to shut down the server is received while we are in
a watchdog hang, immediately treat it as a crash and begin the shutdown
process. Shutdown process is now improved to also shutdown cleanly when
not using restart scripts either.
If a server is deadlocked, a server owner can send SIGUP (or any other signal
the JVM understands to shut down as it currently does) and the watchdog
will no longer need to wait until the full timeout, allowing you to trigger
a close process and try to shut the server down gracefully, saving player and
world data.
Previously there was no way to trigger this outside of waiting for a full watchdog
timeout, which may be set to a really long time...
Leaf informed me this could cause ordering issues.
So, the risk if this occurring is lowered now anyways, but if an
entity causes a sync chunk load, it could process an unload...
We will tackle the problem better in a future commit
Also fixed another async-chunks=false issue
This will help prevent many cases of unregistering entities during entity ticking
Currently delays Chunk Unloads and Async Chunk load callbacks
Also dropped mid ticking chunk tasks during entity ticking to reduce this risk
Previous method only worked for a normal shutdown, and didn't include
when the server enters a closing state due to watchdog crashes
This is the correct variable to detect the server is in the middle of shutdown process
The streams hurt performance and allocate tons of garbage, so
replace them with the standard iterator.
Also optimise the stream.anyMatch statement to move to a bitset
where we can replace the call with a single bitwise operation.
This fix is for the few people who are using such low end systems that
asynchronous chunk loading hurts them rather than helping.
The previous build made paper crash if you turned off async chunks, and
this fixes that issue.
Mark chunks that are blocking main thread for world generation as urgent
Implements a general priority system so that chunks that are sorted in
the generator queues can prioritize certain chunks over another.
Urgent chunks will jump to the front of the line, ensuring that a
sync chunk load on an ungenerated chunk does not lag the server for
a long period of time if the servers generator queues are filled with
lots of chunks already.
This massively reduces the lag spikes from sync chunk gens.
This is also a precursor to my next improvement to prioritize chunks
in front of the player (Frustum Priorization)
In most cases, this change won't benefit much. However, there
exists the possibility that your Chunk Task threads are all busy
doing super slow work such as converting chunks.
If this occurs, the main thread blocking tasks, even at highest priority,
has to wait for some thread to become available.
This change gives us a waiting thread used only for main thread blocking
tasks, as well as an increased thread priority level, so that the OS
will give priority to this thread over the other threads.
This is more about guarantees, and won't be any real performanc boost
to anyone who has low or fast activity on their chunk tasks anyways.
But not all of us force upgrade our worlds, and this can be a life saver.
also reordered some patches because multiple PR's were merged.
Forgot to flip the pending boolean back to false, causing it to copy
empty data on the next tick if nothing else triggered a load.
haven't managed to actually reproduce the crash others got, but did
verify that the bad copy was occurring erasing the data.
also fixed a bug with chunk load callback not executing before
another one was scheduled.
Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing
CraftBukkit Changes:
183139d4 SPIGOT-5665: Improve loading spawn egg NBT
dec5df26 SPIGOT-5667: Can't add recipe without (vanilla) datapack
Spigot Changes:
ae72bf43 SPIGOT-5666: Customizable End City Seed
This can cause a nasty server lag the spawn chunks are not kept loaded
or they aren't finished loading yet, or if the world spawn radius is
larger than the keep loaded range.
By skipping this, we avoid potential for a large spike on server start.
Credit to Spotted for the idea
A lot of the new chunk system requires constant back and forth the main thread
to handle priority scheduling and ensuring conflicting tasks do not run at the
same time.
The issue is, these queues are only checked at either:
A) Sync Chunk Loads
B) End of Tick while sleeping
This results in generating chunks sitting waiting for a full tick to
complete before it will even start the next unit of work to do.
Additionally, this also delays loading of chunks until this same timing.
We will now periodically poll the chunk task queues throughout the tick,
looking for work to do.
We do this in a fair method that considers all worlds, not just the one being
ticked, so that each world can get 1 task procesed each before the next pass.
We also cap the throughput of these task processes to 1 per world per 0.1ms or
200 max per tick, to ensure that high volume of tasks do not overload the current
tick time.
In a view distance of 15, chunk loading performance was visually faster on the client.
Flying at high speed in spectator mode was able to keep up with chunk loading (as long as they are already generated)
Wiz mentioned that large WorldEdit operations cause light to run on
main thread. The queue was small, set to 5.. this bumps it to 20
but makes it configurable per-world.
The main risk of increasing this higher is during shutdown, some
queued light updates may be lost because mojang did not flush the
light engine on shutdown...
The queue size only puts a cap on max loss, doesn't solve that problem.
Don't touch this unless you know you have a problem and ok with the risk.
Upstream has released updates that appears 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:
7361a62e SPIGOT-5641: Add Block.getDrops(ItemStack, Entity)
1dc91b15 Add specific notes about what is not API
2b05ef88 #484: Allow statistics to be accessed for offline players
CraftBukkit Changes:
f7d6ad53 SPIGOT-5603: Use LootContext#lootingModifier in CraftLootTable
5838285d SPIGOT-5657: BlockPlaceEvent not cancelling for tripwire hooks
f325b9be SPIGOT-5641: Add Block.getDrops(ItemStack, Entity)
e25a2272 Fix some formatting in CraftHumanEntity
498540e0 Add Merchant slot delegate
b2de47d5 SPIGOT-5621: Add missing container types for opening InventoryView
aa3a2f27#645: Allow statistics to be accessed for offline players
2122c0b1#649: CraftBell should implement Bell
No longer clones visible chunks which is causing massive memory
allocation issues, likely the source of Humongous Objects on large servers.
Instead we just synchronize, clear and rebuild, reusing the same object buffers
as before with only 2 small objects created (FastIterator/MapEntry)
This should result in siginificant memory use reduction and improved GC behavior.
Upstream has released updates that appears 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:
122289ff Add FaceAttachable interface to handle Grindstone facing in common with Switches
a6db750e SPIGOT-5647: ZombieVillager entity should have getVillagerType()
CraftBukkit Changes:
bbe3d58e SPIGOT-5650: Lectern.setPage(int) causes a NullPointerException
3075579f Add FaceAttachable interface to handle Grindstone facing in common with Switches
95bd4238 SPIGOT-5647: ZombieVillager entity should have getVillagerType()
4d975ac3 SPIGOT-5617: setBlockData does not work when NotPlayEvent is called by redstone current
Try to use a faster chunk lookup for collision detection, and only
fall back to the original for nearby chunks.
The collision code takes an AABB and generates a cuboid of checks rather
than a cylinder, so at high velocity this can generate a lot of chunk checks.
Where I blocked movement did not consider velocity buildup, which I assume
then "unleashes" if something was really trying to push that entity, and moves
it a very large distance.
Additionally, this method was completely misnamed, as movementTick
is more "doLotsOfTickThings", and ended up breaking AI too, which the whole
point of temporary wake ups was to let AI run to trigger new immunity.
Also fixed numerous behavioral rules for Immunity to improve vanilla gameplay,
suchas bees that are angry or moving towards a flower or hive, any insentient
that is targetting any enemy (Accidently made it any player), and included flying
mobs such as phantoms by reducing the type check to insentient instead of Creature.
Also improved inWater immunity to consider if the mob is movable by water or not.
The entire reason the if statement exists is to only flush and print when done if flag is true
This avoids /save-all from hurting as much as it was before, such as from backup plugins.
CraftBukkit caused a regression here by making unloading chunks not
have a ticket added and returning unloaded future.
This caused entities who were killed in same tick their chunk is unloading
to not be able to be removed from the chunk.
This then results in dead entities lingering in the Chunk.
Combine that with a buggy detail of the previous implementation of
the Dupe UUID patch, then this was the likely source of the "Ghost entities"
If something calls register twice, and the world is ticking, it could be
enqueued to add twice.
Vs behavior of non ticking of just overwriting state.
We will now simply log a warning when this happens instead of crashing the server.
This was not applied correctly, and would completely blow up chunk entity
registration if this feature was turned off....
Additionally, change how the entities are removed to be more consistent with other code.
Surface some of the logs indicating there is a problem as we are having so many issues with
entities that we don't need to be surpressing logs like that.
Faster Entity iteration using the chunks full entity list and array access.
Faster chunk lookups skipping the cache, as the pattern of access was not suitable
for cache usage (each request will likely blow cache)
This reduces the cost of Entity Activation Range's initial marking.
1) Immunity no longer gives 20 tick immunity, each immunity check can
give its own tick value on how long it lasts, drastically cutting down on most to 0-1 ticks.
2) Fixed Villager Immunity to use proper 1.15 check for Breeding.
3) Fixed Water Mobs being 100% immune due to the inWater check...
4) Fixed flying mobs being 100% immune due to the !onGround check...
5) Made Insentient mobs only check for the hasTasks during immunity check window, not every single tick. this made them way more active than desired
- this puts behavior closer to inline with my original behavior in Spigot, but still does some checks to allow them temporary immunity, just not as much as before.
6) Inactive Entities would "inch" while trying to move, effectively getting nowhere. Now while an entity is inactive, it just won't even try to move.
- this saves us from the expensiveness of Entity movement 1 out of 20 ticks. Now they will only move while either active or triggered a true immunity.
Upstream has released updates that appears 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:
564ed152 #482: Add a DragonBattle API to manipulate respawn phases etc
9f2fd967 #474: Add ability to set other plugin names as provided API so others can still depend on it
CraftBukkit Changes:
fc318cc1#642: Add a DragonBattle API to manipulate respawn phases etc
796eb15a#644: Fix ChunkMapDistance#removeAllTicketsFor not propagating ticket level updates
a6f80937 SPIGOT-5606: call BlockRedstoneEvent for fence gates
Spigot Changes:
a03b1fdb Rebuild patches
Only occurred when entries were scheduled with huge tick delays
Add two flags to debug excessive tick delays:
-Dpaper.ticklist-warn-on-excessive-delay=true (false by default)
and -Dpaper.ticklist-excessive-delay-threshold=ticks which
sets the excessive tick delay to the specified ticks (defaults to
60 * 20 ticks, aka 60 seconds)
Removing the try catch and generally reducing ops should make it
faster on its own, however removing the try catch makes it
easier to inline due to code size
Previous solution could still block network thread (while addPending is executing). This window is small, but removing it completely is better. This should probably also speed up concurrent adds, because no locking will be performed anymore.
The only possible downside is that adding elements one by one to synchronized list might be slower (But it's done while already locked, so maybe jvm will avoid additional locking?),
This allows you to solve an issue in vanilla behavior where:
* On easy difficulty your villagers will NEVER get infected, meaning they will always die.
* On normal difficulty they will have a 50% of getting infected or dying.
Upstream has released updates that appears 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:
6148fca7 SPIGOT-5484: Add more spawn tick settings
CraftBukkit Changes:
fc249340 SPIGOT-5484: Add more spawn tick settings
Spigot Changes:
6de3d4be Rebuild patches
Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing
CraftBukkit Changes:
7f61a252#640: Fix chunk load/unload callbacks for chunk load cancellations
Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing
CraftBukkit Changes:
13ed05de Prepare for Java 14
6b00b145#639: Deep clone itemmetas persistent container on clone
Upstream has released updates that appears 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:
fd28180e #479: Add LivingEntity#attack, LivingEntity#swingMainHand, LivingEntity#swingOffHand
ae72ba3a SPIGOT-5591: Allow concurrent potion effects
CraftBukkit Changes:
3d61a853 Fix formatting in CraftLivingEntity
f7ab3055#633: Add LivingEntity#attack, LivingEntity#swingMainHand, LivingEntity#swingOffHand
d5ef2eab SPIGOT-5591: Allow concurrent potion effects
25a9a9ff SPIGOT-5592: Custom ChunkGenerator can cause bugged dirt
3f6d0de9 Make it clear in error messages that api-version above 1.13 is also supported
Upstream has released updates that appears 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:
f52c70ab Fix incorrect nullability in MultipleFacing
6af4c0b2 SPIGOT-5311: Add API to get/set item associated with throwable projectiles
97aeae56 Add set/isAware to disable Vanilla AI components of a Mob
CraftBukkit Changes:
fba9f487 Improve legacy conversion of some materials that changed post flattening
b1ba8749 Move Bukkit.Aware loading/saving to correct location
f7cdb53c SPIGOT-5311: Add API to get/set item associated with throwable projectiles
689f429c#634: Cross platform patch scripts
ab85433d Add set/isAware to disable Vanilla AI components of a Mob
Spigot Changes:
8faa8b45 Rebuild patches
This patch detects whether or not the server is currently executing as a privileged user and spits out a warning. The warning serves as a sort-of PSA for newer server admins who don't understand the risks of running as root.
We've seen plenty of bad/malicious plugins hit markets, and there's been a few close-calls with exploits in the past. Hopefully this helps mitigate some potential damage to servers, even if it is just a warning.
* Optimise random block ticking
Massive performance improvement for random block ticking.
The performance increase comes from the fact that the vast
majority of attempted block ticks (~95% in my testing) fail
because the randomly selected block is not tickable.
Now only tickable blocks are targeted, however this means that
the maximum number of block ticks occurs per chunk. However,
not all chunks are going to be targeted. The percent chance
of a chunk being targeted is based on how many tickable blocks
are in the chunk.
This means that while block ticks are spread out less, the
total number of blocks ticked per world tick remains the same.
Therefore, the chance of a random tickable block being ticked
remains the same.
--- work/Bukkit
Submodule work/Bukkit 6a4242cb..337955e3:
> SPIGOT-5468: Improve Beehive TileEntity API
> #473: Add an API for passing the heightmap to getHighestBlockAt* method
--- work/CraftBukkit
Submodule work/CraftBukkit 807a677e..708be695:
> SPIGOT-5468: Improve Beehive TileEntity API
> #624: Add an API for passing the heightmap to getHighestBlockAt* method
> MC-135989, SPIGOT-5564: Don't kick players for flight while riptiding
This deprecates the Paper getHighestBlockAt HeightMap APIs now that
Bukkit has added their own. These methods will stick around long enough
for people to migrate. Their API is pretty much the same as ours,
migration should be quick and easy.
Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing
CraftBukkit Changes:
807a677e SPIGOT-5558: Fix World#getHighestBlockAt, previously off by +1
Upstream has released updates that appears 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:
6a4242cb #468: Allow delegation of certain elements to Vanilla when using a custom ChunkGenerator
c6697f90 SPIGOT-5559: Add EntityPotionEffectEvent causes for PATROL_CAPTAIN and WITHER_ROSE
9c1fa040 #467: Add method to remove a recipe by its key
3961d1aa Add nb-configuration.xml to .gitignore
CraftBukkit Changes:
d70084e5 Remove unused seed in CustomChunkGenerator
8a66d4c7#619: Allow delegation of certain elements to Vanilla when using a custom ChunkGenerator
c2dc19d3 Craftbukkit -> CraftBukkit
ae45e092 SPIGOT-5559: Add EntityPotionEffectEvent causes for bee, raiders and wither rose
00980376#618: Add method to remove a recipe by its key
Spigot Changes:
c574e08b Rebuild patches
13c24cc4 Rebuild patches
Upstream has released updates that appears 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:
d0800d0c Update checkstyle
e4e4bf70 Remove package-info from tests, breaks some IDEs
d6651bb0 No longer necessary to synchronize sync events
CraftBukkit Changes:
e82b5477 SPIGOT-5556: Some biome methods use incorrect positions
544ccdc5 Update checkstyle
512ff7a5 Print legacy load reason in debug mode
df371c1b SPIGOT-5554: Clear error message when BossBar is used for not fully joined players
18168500 Update scriptus
6bbb4e73 Clean up CraftBlockData.toString
b1e96bd5 SPIGOT-5551: BlockState.setData fails when used by legacy plugin
Spigot Changes:
b9baf717 Add space before ocean seed output
13394884 Rebuild patches
Upstream has released updates that appears 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:
93e39ce1 Clarify documentation regarding getMaterial with legacyName = true
c3aeaea0 Improve dependency tracker
14c9d275 Add support for transitive depends in load access warning
c8afe560 SPIGOT-5526: Add EntityEnterBlockEvent
6bb6f07d SPIGOT-5548: Show error that hints towards plugins misusing reflection
ed75537d SPIGOT-5546: Fix bad depend access using wrong provider in message
4e4c0ee9 Fix buggy classloader warning triggering for all classes
89586a4c Print warning when loading classes from depends that have not been specified
d4fe9680 Fix bug where disablePlugin could remove ConfigurationSerializable classes from other plugins
85e683b7 Add additional checkstyle checks
612fd8e1 Correct max page count in BookMeta docs
fa8a9781 Correct max title length in BookMeta docs
CraftBukkit Changes:
ab13a117 SPIGOT-5550: Cancelled ProjectileLaunchEvent still plays sound for eggs
44016b1d SPIGOT-5538: Using javaw to run GUI prints input error
e653ae76 SPIGOT-5526: Call EntityEnterBlockEvent for bees trying to enter hives
6515ea49 SPIGOT-5537: Bee nests generated by growing trees near flower have no bees
d82b3149 Remove unused CraftWorld.getId method
10763a88 Change some block == AIR checks to isAir to catch CAVE_AIR
Spigot Changes:
f2c1cd15 Rebuild patches
bcd458ad Reformat patches
Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing
CraftBukkit Changes:
e911c70f SPIGOT-5542: Cancelling EntityToggleGlideEvent doesn't stop client from gliding
This fixes an issue with plugins using legacy materials, spigot does
not populate the bukkit registry properly, leading to NPEs when using
outdated plugins. This patch should likely be dropped when spigot fixes
their legacy data usage....
Also rebuild patches because 10/10
Upstream has released updates that appears 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:
58d299a5 Clarify that TotalExperience (XpTotal) is not displayed anywhere
3342ab1e #460: Add Player#sendExperienceChange
acc05b40 SPIGOT-5525: saveResource saves files from server jars
CraftBukkit Changes:
5c6b0dc6 SPIGOT-5526: Call EntityChangeBlockEvent for bees triggering crop growth
b91ce119#601: Implement Player#sendExperienceChange
661bebc6 Remove outdated build delay.
