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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sat, 21 Jul 2018 08:25:40 -0400
Subject: [PATCH] Add Debug Entities option to debug dupe uuid issues
diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
index de328a93abcf23d3ff265557a7d8bad5be56287c..9f8ee9d9b5fec9ca9c5e8462ed1aef742fa628ac 100644
--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
@@ -1425,6 +1425,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
} else {
ChunkMap.TrackedEntity playerchunkmap_entitytracker = new ChunkMap.TrackedEntity(entity, i, j, entitytypes.trackDeltas());
+ entity.tracker = playerchunkmap_entitytracker; // Paper - Fast access to tracker
this.entityMap.put(entity.getId(), playerchunkmap_entitytracker);
playerchunkmap_entitytracker.updatePlayers(this.level.players());
if (entity instanceof ServerPlayer) {
@@ -1467,7 +1468,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
if (playerchunkmap_entitytracker1 != null) {
playerchunkmap_entitytracker1.broadcastRemoved();
}
-
+ entity.tracker = null; // Paper - We're no longer tracked
}
protected void tick() {
diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
index a6749080a192a591dd4e52f56b691df8d9cfcd98..e1518465e4ffc473a75a57e4d9b3ad399a022589 100644
--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
@@ -1197,6 +1197,12 @@ public class ServerLevel extends Level implements WorldGenLevel {
// CraftBukkit start
private boolean addEntity(Entity entity, CreatureSpawnEvent.SpawnReason spawnReason) {
org.spigotmc.AsyncCatcher.catchOp("entity add"); // Spigot
+ // Paper start - extra debug info
+ if (entity.valid) {
+ MinecraftServer.LOGGER.error("Attempted Double World add on {}", entity, new Throwable());
+ return true;
+ }
+ // Paper end - extra debug info
if (entity.isRemoved()) {
// WorldServer.LOGGER.warn("Tried to add entity {} but it was marked as removed already", EntityTypes.getKey(entity.getType())); // CraftBukkit
return false;
diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index 803802380883cb198b4a40c08d1540cacaca8c2f..5a837807037b2bf8c3cd5f7fd5965c26cbc79e1b 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -241,6 +241,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, S
public com.destroystokyo.paper.loottable.PaperLootableInventoryData lootableData; // Paper
private CraftEntity bukkitEntity;
+ public @org.jetbrains.annotations.Nullable net.minecraft.server.level.ChunkMap.TrackedEntity tracker; // Paper
public CraftEntity getBukkitEntity() {
if (this.bukkitEntity == null) {
this.bukkitEntity = CraftEntity.getEntity(this.level.getCraftServer(), this);
diff --git a/src/main/java/net/minecraft/world/level/entity/EntityLookup.java b/src/main/java/net/minecraft/world/level/entity/EntityLookup.java
index 21a2800db22f287b9c6a8290326fdf3b94ae94b1..2e561ac90a8c91ea13cfc18d09f8e0abbcff9385 100644
--- a/src/main/java/net/minecraft/world/level/entity/EntityLookup.java
+++ b/src/main/java/net/minecraft/world/level/entity/EntityLookup.java
@@ -34,6 +34,14 @@ public class EntityLookup<T extends EntityAccess> {
UUID uUID = entity.getUUID();
if (this.byUuid.containsKey(uUID)) {
LOGGER.warn("Duplicate entity UUID {}: {}", uUID, entity);
+ // Paper start - extra debug info
+ if (entity instanceof net.minecraft.world.entity.Entity) {
+ final T old = this.byUuid.get(entity.getUUID());
+ if (old instanceof net.minecraft.world.entity.Entity oldCast && oldCast.getId() != entity.getId() && oldCast.valid) {
+ LOGGER.error("Overwrote an existing entity {} with {}", oldCast, entity);
+ }
+ }
+ // Paper end - extra debug info
} else {
this.byUuid.put(uUID, entity);
this.byId.put(entity.getId(), entity);
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