From 92aaeae9ce1a4ceaf3e1e9ec95789677187ece51 Mon Sep 17 00:00:00 2001 From: Aikar 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 a2101d44f9..f05545e357 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/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java index b048343b7c..747d99dbe6 100644 --- a/src/main/java/net/minecraft/server/WorldServer.java +++ b/src/main/java/net/minecraft/server/WorldServer.java @@ -53,6 +53,10 @@ public class WorldServer extends World implements IAsyncTaskHandler { private boolean Q; // CraftBukkit start + private static final boolean DEBUG_ENTITIES = Boolean.getBoolean("debug.entities"); // Paper + private static Throwable getAddToWorldStackTrace(Entity entity) { + return new Throwable(entity + " Added to world at " + new java.util.Date()); + } public final int dimension; // Add env and gen to constructor @@ -980,6 +984,7 @@ 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: " + entity); // CraftBukkit // Paper + if (DEBUG_ENTITIES) getAddToWorldStackTrace(entity).printStackTrace(); return false; } else { UUID uuid = entity.getUniqueID(); @@ -991,8 +996,14 @@ 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("Keeping entity {} that already exists with UUID {}", entity1, uuid.toString()); // CraftBukkit // Paper WorldServer.a.error("Deleting duplicate entity {}", entity); // Paper + if (DEBUG_ENTITIES) { + if (entity1.addedToWorldStack != null) { + entity1.addedToWorldStack.printStackTrace(); + } + getAddToWorldStackTrace(entity).printStackTrace(); + } return false; } @@ -1009,7 +1020,25 @@ 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) { -- 2.18.0