From d10c53b639cee25522092b354621d0002f7e04e7 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 diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java index 8e7eedd09..58122bfcc 100644 --- a/src/main/java/net/minecraft/server/Entity.java +++ b/src/main/java/net/minecraft/server/Entity.java @@ -71,6 +71,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke protected CraftEntity bukkitEntity; EntityTrackerEntry tracker; // Paper + Throwable addedToWorldStack; // Paper - entity debug public CraftEntity getBukkitEntity() { if (bukkitEntity == null) { bukkitEntity = CraftEntity.getEntity(world.getServer(), this); diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java index 9befa890b..c3369dcf4 100644 --- a/src/main/java/net/minecraft/server/World.java +++ b/src/main/java/net/minecraft/server/World.java @@ -110,6 +110,7 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc public boolean pvpMode; public boolean keepSpawnInMemory = true; public ChunkGenerator generator; + public static final boolean DEBUG_ENTITIES = Boolean.getBoolean("debug.entities"); // Paper public boolean captureBlockStates = false; public boolean captureTreeGeneration = false; diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java index 85a30652c..6d1f70b39 100644 --- a/src/main/java/net/minecraft/server/WorldServer.java +++ b/src/main/java/net/minecraft/server/WorldServer.java @@ -51,6 +51,9 @@ public class WorldServer extends World implements IAsyncTaskHandler { // CraftBukkit start public final DimensionManager dimension; + private static Throwable getAddToWorldStackTrace(Entity entity) { + return new Throwable(entity + " Added to world at " + new java.util.Date()); + } // Add env and gen to constructor public WorldServer(MinecraftServer minecraftserver, IDataManager idatamanager, PersistentCollection persistentcollection, WorldData worlddata, DimensionManager dimensionmanager, MethodProfiler methodprofiler, org.bukkit.World.Environment env, org.bukkit.generator.ChunkGenerator gen) { @@ -951,7 +954,12 @@ public class WorldServer extends World implements IAsyncTaskHandler { private boolean j(Entity entity) { if (entity.dead) { - // WorldServer.a.warn("Tried to add entity {} but it was marked as removed already", EntityTypes.getName(entity.P())); // CraftBukkit + // 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 return false; } else { UUID uuid = entity.getUniqueID(); @@ -963,8 +971,15 @@ public class WorldServer extends World implements IAsyncTaskHandler { this.g.remove(entity1); } else { if (!(entity instanceof EntityHuman)) { - WorldServer.a.error("Keeping entity {} that already exists with UUID {} - " + entity1, EntityTypes.getName(entity1.P()), uuid.toString()); // CraftBukkit // Paper - WorldServer.a.error("Deleting duplicate entity {}", entity); // Paper + if (DEBUG_ENTITIES) { + WorldServer.a.error("Keeping entity {} that already exists with UUID {}", entity1, uuid.toString()); // CraftBukkit // Paper + WorldServer.a.error("Deleting duplicate entity {}", entity); // Paper + + if (entity1.addedToWorldStack != null) { + entity1.addedToWorldStack.printStackTrace(); + } + getAddToWorldStackTrace(entity).printStackTrace(); + } return false; } @@ -981,7 +996,25 @@ public class WorldServer extends World implements IAsyncTaskHandler { protected void b(Entity entity) { super.b(entity); this.entitiesById.a(entity.getId(), entity); - this.entitiesByUUID.put(entity.getUniqueID(), entity); + // Paper start + if (DEBUG_ENTITIES) { + entity.addedToWorldStack = getAddToWorldStackTrace(entity); + } + + Entity old = this.entitiesByUUID.put(entity.getUniqueID(), entity); + if (old != null && old.getId() != entity.getId() && old.valid) { + Logger logger = LogManager.getLogger(); + logger.error("Overwrote an existing entity " + old + " with " + entity); + if (DEBUG_ENTITIES) { + if (old.addedToWorldStack != null) { + old.addedToWorldStack.printStackTrace(); + } else { + logger.error("Oddly, the old entity was not added to the world in the normal way. Plugins?"); + } + entity.addedToWorldStack.printStackTrace(); + } + } + // Paper end Entity[] aentity = entity.bi(); if (aentity != null) { -- 2.21.0