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Paper/patches/server/0244-Add-Debug-Entities-option-to-debug-dupe-uuid-issues.patch

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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
Add -Ddebug.entities=true to your JVM flags to gain more information
1.17: Needs to be reworked for new entity storage system
diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
index 5e53ef4b71969737f900063ab631f4a1ce74cb90..a85f96c5cb661082962cd768eaf41affb8e2fe15 100644
--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
@@ -1206,6 +1206,7 @@ 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) {
@@ -1248,7 +1249,7 @@ 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 dd2710f2a093fcca9f80edf41866459d63bac94c..1d95dae881fd89056e2ad86a8f33aecf90cf8a3b 100644
--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
@@ -199,6 +199,9 @@ public class ServerLevel extends Level implements WorldGenLevel {
public final LevelStorageSource.LevelStorageAccess convertable;
public final UUID uuid;
public boolean hasPhysicsEvent = true; // Paper
+ public static Throwable getAddToWorldStackTrace(Entity entity) {
+ return new Throwable(entity + " Added to world at " + new java.util.Date());
+ }
@Override public LevelChunk getChunkIfLoaded(int x, int z) { // Paper - this was added in world too but keeping here for NMS ABI
return this.chunkSource.getChunk(x, z, false);
@@ -1070,7 +1073,28 @@ public class ServerLevel extends Level implements WorldGenLevel {
// CraftBukkit start
private boolean addEntity0(Entity entity, CreatureSpawnEvent.SpawnReason spawnReason) {
org.spigotmc.AsyncCatcher.catchOp("entity add"); // Spigot
+ // Paper start
+ if (entity.valid) {
+ MinecraftServer.LOGGER.error("Attempted Double World add on " + entity, new Throwable());
+
+ if (DEBUG_ENTITIES) {
+ Throwable thr = entity.addedToWorldStack;
+ if (thr == null) {
+ MinecraftServer.LOGGER.error("Double add entity has no add stacktrace");
+ } else {
+ MinecraftServer.LOGGER.error("Double add stacktrace: ", thr);
+ }
+ }
+ return true;
+ }
+ // Paper end
if (entity.isRemoved()) {
+ // Paper start
+ if (DEBUG_ENTITIES) {
+ new Throwable("Tried to add entity " + entity + " but it was marked as removed already").printStackTrace(); // CraftBukkit
+ getAddToWorldStackTrace(entity).printStackTrace();
+ }
+ // Paper end
// WorldServer.LOGGER.warn("Tried to add entity {} but it was marked as removed already", EntityTypes.getName(entity.getEntityType())); // CraftBukkit
return false;
} else {
diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index 2a6954e3c9ff82d68647bf8f4c4803184fab0bbe..b4f2b969ad30be38c0a9e3f8efd2a57c3e0f7df0 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -171,6 +171,8 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, n
public com.destroystokyo.paper.loottable.PaperLootableInventoryData lootableData; // Paper
private CraftEntity bukkitEntity;
+ public net.minecraft.server.level.ChunkMap.TrackedEntity tracker; // Paper
+ public Throwable addedToWorldStack; // Paper - entity debug
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/Level.java b/src/main/java/net/minecraft/world/level/Level.java
index 2647b88ffffa393e744d9e003032468acc92668a..76cb42b147e05595e64c4ff6f13881780a1a9be4 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -141,6 +141,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
public boolean pvpMode;
public boolean keepSpawnInMemory = true;
public org.bukkit.generator.ChunkGenerator generator;
+ public static final boolean DEBUG_ENTITIES = Boolean.getBoolean("debug.entities"); // Paper
public boolean preventPoiUpdated = false; // CraftBukkit - SPIGOT-5710
public boolean captureBlockStates = false;
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 c8cf7da4224dccd9b9e8a73bcfc3ff5babfb8f8c..1d04f35b6755b3a7ee77f93c1a30513a5af7d6cf 100644
--- a/src/main/java/net/minecraft/world/level/entity/EntityLookup.java
+++ b/src/main/java/net/minecraft/world/level/entity/EntityLookup.java
@@ -20,7 +20,7 @@ public class EntityLookup<T extends EntityAccess> {
for(T entityAccess : this.byId.values()) {
U entityAccess2 = (U)((EntityAccess)filter.tryCast(entityAccess));
if (entityAccess2 != null) {
- action.accept((T)entityAccess2);
+ action.accept(entityAccess2); // Paper - decompile fix
}
}
@@ -34,6 +34,27 @@ 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) {
+ if (net.minecraft.server.level.ServerLevel.DEBUG_ENTITIES) {
+ ((net.minecraft.world.entity.Entity) entity).addedToWorldStack = net.minecraft.server.level.ServerLevel.getAddToWorldStackTrace((net.minecraft.world.entity.Entity) entity);
+ }
+
+ T old = this.byUuid.get(entity.getUUID());
+ if (old instanceof net.minecraft.world.entity.Entity && old != null && old.getId() != entity.getId() && ((net.minecraft.world.entity.Entity) old).valid) {
+ Logger logger = LogManager.getLogger();
+ logger.error("Overwrote an existing entity " + old + " with " + entity);
+ if (net.minecraft.server.level.ServerLevel.DEBUG_ENTITIES) {
+ if (((net.minecraft.world.entity.Entity) old).addedToWorldStack != null) {
+ ((net.minecraft.world.entity.Entity) old).addedToWorldStack.printStackTrace();
+ } else {
+ logger.error("Oddly, the old entity was not added to the world in the normal way. Plugins?");
+ }
+ ((net.minecraft.world.entity.Entity) entity).addedToWorldStack.printStackTrace();
+ }
+ }
+ }
+ // Paper end
} else {
this.byUuid.put(uUID, entity);
this.byId.put(entity.getId(), entity);
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