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c5a10665b8
Spigot still maintains some partial implementation of "tick skipping", a practice in which the MinecraftServer.currentTick field is updated not by an increment of one per actual tick, but instead set to System.currentTimeMillis() / 50. This behaviour means that the tracked tick may "skip" a tick value in case a previous tick took more than the expected 50ms. To compensate for this in important paths, spigot/craftbukkit implements "wall-time". Instead of incrementing/decrementing ticks on block entities/entities by one for each call to their tick() method, they instead increment/decrement important values, like an ItemEntity's age or pickupDelay, by the difference of `currentTick - lastTick`, where `lastTick` is the value of `currentTick` during the last tick() call. These "fixes" however do not play nicely with minecraft's simulation distance as entities/block entities implementing the above behaviour would "catch up" their values when moving from a non-ticking chunk to a ticking one as their `lastTick` value remains stuck on the last tick in a ticking chunk and hence lead to a large "catch up" once ticked again. Paper completely removes the "tick skipping" behaviour (See patch "Further-improve-server-tick-loop"), making the above precautions completely unnecessary, which also rids paper of the previous described incompatibility with non-ticking chunks.
82 lines
3.8 KiB
Diff
82 lines
3.8 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Owen1212055 <23108066+Owen1212055@users.noreply.github.com>
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Date: Sun, 6 Mar 2022 11:09:09 -0500
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Subject: [PATCH] Prevent entity loading causing async lookups
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diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
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index 3bb7e0f6a02b9b1726b8c878271d89a9c6d56c12..de483cc77931fcb1d8bb9b1bcfd6606706490fba 100644
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--- a/src/main/java/net/minecraft/world/entity/Entity.java
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+++ b/src/main/java/net/minecraft/world/entity/Entity.java
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@@ -714,6 +714,7 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
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public void baseTick() {
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this.level().getProfiler().push("entityBaseTick");
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+ if (firstTick && this instanceof net.minecraft.world.entity.NeutralMob neutralMob) neutralMob.tickInitialPersistentAnger(level); // Paper - Prevent entity loading causing async lookups
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this.inBlockState = null;
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if (this.isPassenger() && this.getVehicle().isRemoved()) {
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this.stopRiding();
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diff --git a/src/main/java/net/minecraft/world/entity/NeutralMob.java b/src/main/java/net/minecraft/world/entity/NeutralMob.java
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index 3b08905ddc3c2506779ce0eac1a53a4d89442ddc..b55633bf4e26dc00e27ab28c7739c274e48b74c3 100644
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--- a/src/main/java/net/minecraft/world/entity/NeutralMob.java
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+++ b/src/main/java/net/minecraft/world/entity/NeutralMob.java
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@@ -45,24 +45,11 @@ public interface NeutralMob {
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UUID uuid = nbt.getUUID("AngryAt");
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this.setPersistentAngerTarget(uuid);
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- Entity entity = ((ServerLevel) world).getEntity(uuid);
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-
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- if (entity != null) {
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- if (entity instanceof Mob) {
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- Mob entityinsentient = (Mob) entity;
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-
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- this.setTarget(entityinsentient, EntityTargetEvent.TargetReason.UNKNOWN, false); // CraftBukkit
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- this.setLastHurtByMob(entityinsentient);
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- }
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-
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- if (entity instanceof Player) {
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- Player entityhuman = (Player) entity;
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-
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- this.setTarget(entityhuman, EntityTargetEvent.TargetReason.UNKNOWN, false); // CraftBukkit
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- this.setLastHurtByPlayer(entityhuman);
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- }
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-
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- }
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+ // Paper - Prevent entity loading causing async lookups; Moved diff to separate method
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+ // If this entity already survived its first tick, e.g. is loaded and ticked in sync, actively
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+ // tick the initial persistent anger.
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+ // If not, let the first tick on the baseTick call the method later down the line.
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+ if (this instanceof Entity entity && !entity.firstTick) this.tickInitialPersistentAnger(world);
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}
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}
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}
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@@ -136,4 +123,28 @@ public interface NeutralMob {
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@Nullable
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LivingEntity getTarget();
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+
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+ // Paper start - Prevent entity loading causing async lookups
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+ // Update last hurt when ticking
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+ default void tickInitialPersistentAnger(Level level) {
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+ UUID target = getPersistentAngerTarget();
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+ if (target == null) {
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+ return;
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+ }
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+
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+ Entity entity = ((ServerLevel) level).getEntity(target);
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+
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+ if (entity != null) {
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+ if (entity instanceof Mob mob) {
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+ this.setTarget(mob, EntityTargetEvent.TargetReason.UNKNOWN, false); // CraftBukkit
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+ this.setLastHurtByMob(mob);
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+ }
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+
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+ if (entity instanceof Player player) {
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+ this.setTarget(player, EntityTargetEvent.TargetReason.UNKNOWN, false); // CraftBukkit
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+ this.setLastHurtByPlayer(player);
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+ }
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+ }
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+ }
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+ // Paper end - Prevent entity loading causing async lookups
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}
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