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https://github.com/PaperMC/Paper.git
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2a2d9fb508
1) Removed "Regen" mode of Dupe UUID resolver, forced safe. Some servers who updated before we had safe mode added still had this value. There's really no reason to keep this mode, as we've seen that vanilla triggers this often and 99.9999999% of cases will be an actual duplicate that needs to be deleted. 2) Made Vanilla Debug messages about dupe UUIDs and dupe uuid resolve messages only show up if the debug.entities flag is on. This will stop server owners from panicing from seeing these logs, and stop opening bug reports on this, only for us to tell you "don't worry about it". 3) Avoid adding entities to world that are already added to world. This can be triggered by anything that causes an entity to be added to the world during the chunk load process, such as chunk conversions. Issue #1544 was a case of this. 4) Removed debug warning about ExpiringMap. Nothing more I know to do about this anyways. We recover from it, stop warning to reduce noise of issues to us.
108 lines
5.5 KiB
Diff
108 lines
5.5 KiB
Diff
From 23a899902be4cf2fe569776330edac2e5dd52740 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Sat, 21 Jul 2018 08:25:40 -0400
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Subject: [PATCH] Add Debug Entities option to debug dupe uuid issues
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Add -Ddebug.entities=true to your JVM flags to gain more information
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diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
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index 42c1c47c58..3606c78843 100644
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--- a/src/main/java/net/minecraft/server/Entity.java
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+++ b/src/main/java/net/minecraft/server/Entity.java
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@@ -73,6 +73,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
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protected CraftEntity bukkitEntity;
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EntityTrackerEntry tracker; // Paper
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+ Throwable addedToWorldStack; // Paper - entity debug
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public CraftEntity getBukkitEntity() {
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if (bukkitEntity == null) {
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bukkitEntity = CraftEntity.getEntity(world.getServer(), this);
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diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
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index ee2cdb897c..a341f5de9a 100644
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--- a/src/main/java/net/minecraft/server/World.java
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+++ b/src/main/java/net/minecraft/server/World.java
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@@ -115,6 +115,7 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
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public boolean pvpMode;
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public boolean keepSpawnInMemory = true;
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public ChunkGenerator generator;
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+ public static final boolean DEBUG_ENTITIES = Boolean.getBoolean("debug.entities"); // Paper
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public boolean captureBlockStates = false;
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public boolean captureTreeGeneration = false;
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diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java
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index 27278078e4..7eab55e7c1 100644
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--- a/src/main/java/net/minecraft/server/WorldServer.java
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+++ b/src/main/java/net/minecraft/server/WorldServer.java
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@@ -55,6 +55,9 @@ public class WorldServer extends World implements IAsyncTaskHandler {
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// CraftBukkit start
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public final DimensionManager dimension;
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+ private static Throwable getAddToWorldStackTrace(Entity entity) {
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+ return new Throwable(entity + " Added to world at " + new java.util.Date());
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+ }
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// Add env and gen to constructor
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public WorldServer(MinecraftServer minecraftserver, IDataManager idatamanager, PersistentCollection persistentcollection, WorldData worlddata, DimensionManager dimensionmanager, MethodProfiler methodprofiler, org.bukkit.World.Environment env, org.bukkit.generator.ChunkGenerator gen) {
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@@ -974,7 +977,12 @@ public class WorldServer extends World implements IAsyncTaskHandler {
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private boolean j(Entity entity) {
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if (entity.dead) {
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- // WorldServer.a.warn("Tried to add entity {} but it was marked as removed already", EntityTypes.getName(entity.P())); // CraftBukkit
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+ // Paper start
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+ if (DEBUG_ENTITIES) {
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+ new Throwable("Tried to add entity " + entity + " but it was marked as removed already").printStackTrace(); // CraftBukkit
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+ getAddToWorldStackTrace(entity).printStackTrace();
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+ }
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+ // Paper end
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return false;
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} else {
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UUID uuid = entity.getUniqueID();
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@@ -986,8 +994,15 @@ public class WorldServer extends World implements IAsyncTaskHandler {
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this.g.remove(entity1);
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} else {
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if (!(entity instanceof EntityHuman)) {
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- WorldServer.a.error("Keeping entity {} that already exists with UUID {} - " + entity1, EntityTypes.getName(entity1.P()), uuid.toString()); // CraftBukkit // Paper
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- WorldServer.a.error("Deleting duplicate entity {}", entity); // Paper
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+ if (DEBUG_ENTITIES) {
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+ WorldServer.a.error("Keeping entity {} that already exists with UUID {}", entity1, uuid.toString()); // CraftBukkit // Paper
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+ WorldServer.a.error("Deleting duplicate entity {}", entity); // Paper
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+
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+ if (entity1.addedToWorldStack != null) {
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+ entity1.addedToWorldStack.printStackTrace();
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+ }
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+ getAddToWorldStackTrace(entity).printStackTrace();
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+ }
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return false;
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}
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@@ -1004,7 +1019,25 @@ public class WorldServer extends World implements IAsyncTaskHandler {
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protected void b(Entity entity) {
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super.b(entity);
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this.entitiesById.a(entity.getId(), entity);
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- this.entitiesByUUID.put(entity.getUniqueID(), entity);
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+ // Paper start
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+ if (DEBUG_ENTITIES) {
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+ entity.addedToWorldStack = getAddToWorldStackTrace(entity);
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+ }
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+
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+ Entity old = this.entitiesByUUID.put(entity.getUniqueID(), entity);
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+ if (old != null && old.getId() != entity.getId() && old.valid) {
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+ Logger logger = LogManager.getLogger();
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+ logger.error("Overwrote an existing entity " + old + " with " + entity);
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+ if (DEBUG_ENTITIES) {
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+ if (old.addedToWorldStack != null) {
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+ old.addedToWorldStack.printStackTrace();
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+ } else {
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+ logger.error("Oddly, the old entity was not added to the world in the normal way. Plugins?");
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+ }
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+ entity.addedToWorldStack.printStackTrace();
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+ }
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+ }
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+ // Paper end
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Entity[] aentity = entity.bi();
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if (aentity != null) {
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--
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2.19.0
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