Paper/Spigot-Server-Patches/0359-Duplicate-UUID-Resolve-Option.patch
Aikar ab347c4c96
Updated Upstream (Bukkit/CraftBukkit/Spigot)
Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
42d5a714 SPIGOT-5899: Hoglins API similar to Piglins
2c1ee10e SPIGOT-5887: ClickType doesn't include off hand swaps
5ff7c7ce SPIGOT-5886: Missing BlockData

CraftBukkit Changes:
7560f5f5 SPIGOT-5905: Fix hex colours not being allowed in MOTD
d47c47ee SPIGOT-5889: Villager using composter should call EntityChangeBlockEvent
2fe6b4a3 SPIGOT-5899: Hoglins API similar to Piglins
e09dbeca SPIGOT-5887: ClickType doesn't include off hand swaps
23aac2a5 SPIGOT-5903: EntityDismountEvent cannot be triggered asynchronously
92cbf656 SPIGOT-5884: Tab completions lost on reloadData / minecraft:reload
fb4e54ad SPIGOT-5902: PlayerRespawnEvent places player at spawn before event is called
aa8f3d5a SPIGOT-5901: Structures are generated in all worlds based on the setting for the main world
a0c35937 SPIGOT-5895: PlayerChangedWorldEvent#getFrom is incorrect
89c0a5c3 SPIGOT-5886: Missing BlockData

Spigot Changes:
0287a20d SPIGOT-5903: EntityDismountEvent cannot be triggered asynchronously
2020-06-30 01:20:29 -04:00

238 lines
12 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sat, 21 Jul 2018 14:27:34 -0400
Subject: [PATCH] Duplicate UUID Resolve Option
Due to a bug in https://github.com/PaperMC/Paper/commit/2e29af3df05ec0a383f48be549d1c03200756d24
which was added all the way back in March of 2016, it was unknown (potentially not at the time)
that an entity might actually change the seed of the random object.
At some point, EntitySquid did start setting the seed. Due to this shared random, this caused
every entity to use a Random object with a predictable seed.
This has caused entities to potentially generate with the same UUID....
Over the years, servers have had entities disappear, but no sign of trouble
because CraftBukkit removed the log lines indicating that something was wrong.
We have fixed the root issue causing duplicate UUID's, however we now have chunk
files full of entities that have the same UUID as another entity!
When these chunks load, the 2nd entity will not be added to the world correctly.
If that chunk loads in a different order in the future, then it will reverse and the
missing one is now the one added to the world and not the other. This results in very
inconsistent entity behavior.
This change allows you to recover any duplicate entity by generating a new UUID for it.
This also lets you delete them instead if you don't want to risk having new entities added to
the world that you previously did not see.
But for those who are ok with leaving this inconsistent behavior, you may use WARN or NOTHING options.
It is recommended you regenerate the entities, as these were legit entities, and deserve your love.
diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index a73b88d51608ce94f6e4c9013c8c4de97523fe42..6e29e3294d0661cc35d53b4201d980a2db4f5c93 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -405,4 +405,43 @@ public class PaperWorldConfig {
private void preventMovingIntoUnloadedChunks() {
preventMovingIntoUnloadedChunks = getBoolean("prevent-moving-into-unloaded-chunks", false);
}
+
+ public enum DuplicateUUIDMode {
+ SAFE_REGEN, DELETE, NOTHING, WARN
+ }
+ public DuplicateUUIDMode duplicateUUIDMode = DuplicateUUIDMode.SAFE_REGEN;
+ public int duplicateUUIDDeleteRange = 32;
+ private void repairDuplicateUUID() {
+ String desiredMode = getString("duplicate-uuid-resolver", "saferegen").toLowerCase().trim();
+ duplicateUUIDDeleteRange = getInt("duplicate-uuid-saferegen-delete-range", duplicateUUIDDeleteRange);
+ switch (desiredMode.toLowerCase()) {
+ case "regen":
+ case "regenerate":
+ case "saferegen":
+ case "saferegenerate":
+ duplicateUUIDMode = DuplicateUUIDMode.SAFE_REGEN;
+ log("Duplicate UUID Resolve: Regenerate New UUID if distant (Delete likely duplicates within " + duplicateUUIDDeleteRange + " blocks)");
+ break;
+ case "remove":
+ case "delete":
+ duplicateUUIDMode = DuplicateUUIDMode.DELETE;
+ log("Duplicate UUID Resolve: Delete Entity");
+ break;
+ case "silent":
+ case "nothing":
+ duplicateUUIDMode = DuplicateUUIDMode.NOTHING;
+ logError("Duplicate UUID Resolve: Do Nothing (no logs) - Warning, may lose indication of bad things happening");
+ break;
+ case "log":
+ case "warn":
+ duplicateUUIDMode = DuplicateUUIDMode.WARN;
+ log("Duplicate UUID Resolve: Warn (do nothing but log it happened, may be spammy)");
+ break;
+ default:
+ duplicateUUIDMode = DuplicateUUIDMode.WARN;
+ logError("Warning: Invalid duplicate-uuid-resolver config " + desiredMode + " - must be one of: regen, delete, nothing, warn");
+ log("Duplicate UUID Resolve: Warn (do nothing but log it happened, may be spammy)");
+ break;
+ }
+ }
}
diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
index f7be161c8557ae3848227b1a61e27374770ad243..141f2e8975b01fc2a5e7743955894f100c3062a2 100644
--- a/src/main/java/net/minecraft/server/Chunk.java
+++ b/src/main/java/net/minecraft/server/Chunk.java
@@ -499,6 +499,7 @@ public class Chunk implements IChunkAccess {
if (i != this.loc.x || j != this.loc.z) {
Chunk.LOGGER.warn("Wrong location! ({}, {}) should be ({}, {}), {}", i, j, this.loc.x, this.loc.z, entity);
entity.dead = true;
+ return; // Paper
}
int k = MathHelper.floor(entity.locY() / 16.0D);
diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
index 4502ea222d98872a4c33714a8c3149c6d42dee46..5a897b844d676309230fee83c0250a8a2600a581 100644
--- a/src/main/java/net/minecraft/server/Entity.java
+++ b/src/main/java/net/minecraft/server/Entity.java
@@ -2682,6 +2682,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
});
}
+ public void setUUID(UUID uuid) { a_(uuid); } // Paper - OBFHELPER
public void a_(UUID uuid) {
this.uniqueID = uuid;
this.al = this.uniqueID.toString();
diff --git a/src/main/java/net/minecraft/server/PlayerChunkMap.java b/src/main/java/net/minecraft/server/PlayerChunkMap.java
index 458802dc4b1f923b159168efff0546bb731da07b..936be3fd8954933ac218f62a172df6878d128ec9 100644
--- a/src/main/java/net/minecraft/server/PlayerChunkMap.java
+++ b/src/main/java/net/minecraft/server/PlayerChunkMap.java
@@ -1,6 +1,7 @@
package net.minecraft.server;
import co.aikar.timings.Timing; // Paper
+import com.destroystokyo.paper.PaperWorldConfig; // Paper
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;
import com.google.common.collect.ComparisonChain; // Paper
@@ -23,14 +24,17 @@ import it.unimi.dsi.fastutil.objects.ObjectIterator;
import java.io.File;
import java.io.IOException;
import java.io.Writer;
+import java.util.HashMap; // Paper
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
+import java.util.Map; // Paper
import java.util.Objects;
import java.util.Optional;
import java.util.Queue;
import java.util.Set;
import java.util.concurrent.CancellationException;
+import java.util.UUID; // Paper
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionException;
import java.util.concurrent.Executor;
@@ -651,12 +655,12 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
// CraftBukkit start - these are spawned serialized (DefinedStructure) and we don't call an add event below at the moment due to ordering complexities
boolean needsRemoval = false;
if (chunk.needsDecoration && !this.world.getServer().getServer().getSpawnNPCs() && entity instanceof NPC) {
- entity.die();
+ entity.dead = true; // Paper
needsRemoval = true;
}
-
- if (!(entity instanceof EntityHuman) && (needsRemoval || !this.world.addEntityChunk(entity))) {
- // CraftBukkit end
+ // CraftBukkit end
+ checkDupeUUID(entity); // Paper
+ if (!(entity instanceof EntityHuman) && (entity.dead || !this.world.addEntityChunk(entity))) { // Paper
if (list == null) {
list = Lists.newArrayList(new Entity[]{entity});
} else {
@@ -683,6 +687,44 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
});
}
+ // Paper start
+ private void checkDupeUUID(Entity entity) {
+ PaperWorldConfig.DuplicateUUIDMode mode = world.paperConfig.duplicateUUIDMode;
+ if (mode != PaperWorldConfig.DuplicateUUIDMode.WARN
+ && mode != PaperWorldConfig.DuplicateUUIDMode.DELETE
+ && mode != PaperWorldConfig.DuplicateUUIDMode.SAFE_REGEN) {
+ return;
+ }
+ Entity other = world.getEntity(entity.uniqueID);
+
+ if (mode == PaperWorldConfig.DuplicateUUIDMode.SAFE_REGEN && other != null && !other.dead
+ && Objects.equals(other.getSaveID(), entity.getSaveID())
+ && entity.getBukkitEntity().getLocation().distance(other.getBukkitEntity().getLocation()) < world.paperConfig.duplicateUUIDDeleteRange
+ ) {
+ if (World.DEBUG_ENTITIES) LOGGER.warn("[DUPE-UUID] Duplicate UUID found used by " + other + ", deleted entity " + entity + " because it was near the duplicate and likely an actual duplicate. See https://github.com/PaperMC/Paper/issues/1223 for discussion on what this is about.");
+ entity.dead = true;
+ return;
+ }
+ if (other != null && !other.dead) {
+ switch (mode) {
+ case SAFE_REGEN: {
+ entity.setUUID(UUID.randomUUID());
+ if (World.DEBUG_ENTITIES) LOGGER.warn("[DUPE-UUID] Duplicate UUID found used by " + other + ", regenerated UUID for " + entity + ". See https://github.com/PaperMC/Paper/issues/1223 for discussion on what this is about.");
+ break;
+ }
+ case DELETE: {
+ if (World.DEBUG_ENTITIES) LOGGER.warn("[DUPE-UUID] Duplicate UUID found used by " + other + ", deleted entity " + entity + ". See https://github.com/PaperMC/Paper/issues/1223 for discussion on what this is about.");
+ entity.dead = true;
+ break;
+ }
+ default:
+ if (World.DEBUG_ENTITIES) LOGGER.warn("[DUPE-UUID] Duplicate UUID found used by " + other + ", doing nothing to " + entity + ". See https://github.com/PaperMC/Paper/issues/1223 for discussion on what this is about.");
+ break;
+ }
+ }
+ }
+ // Paper end
+
public CompletableFuture<Either<Chunk, PlayerChunk.Failure>> a(PlayerChunk playerchunk) {
ChunkCoordIntPair chunkcoordintpair = playerchunk.i();
CompletableFuture<Either<List<IChunkAccess>, PlayerChunk.Failure>> completablefuture = this.a(chunkcoordintpair, 1, (i) -> {
diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java
index 576f5c8c4d702dae7f2db9fb221365394542fcfb..a243dc63eb4c811065c742e61b334864ad582fbe 100644
--- a/src/main/java/net/minecraft/server/WorldServer.java
+++ b/src/main/java/net/minecraft/server/WorldServer.java
@@ -5,6 +5,8 @@ import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;
import co.aikar.timings.TimingHistory; // Paper
import co.aikar.timings.Timings; // Paper
+
+import com.destroystokyo.paper.PaperWorldConfig; // Paper
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.collect.Queues;
@@ -988,8 +990,24 @@ public class WorldServer extends World implements GeneratorAccessSeed {
if (entity1 == null) {
return false;
} else {
- WorldServer.LOGGER.error("Keeping entity {} that already exists with UUID {}", EntityTypes.getName(entity1.getEntityType()), entity.getUniqueID().toString()); // CraftBukkit // paper
+ // Paper start
+ if (entity1.dead) {
+ unregisterEntity(entity1); // remove the existing entity
+ return false;
+ }
+ // Paper end
+ WorldServer.LOGGER.error("Keeping entity {} that already exists with UUID {}", entity1, entity.getUniqueID().toString()); // CraftBukkit // paper
WorldServer.LOGGER.error("Deleting duplicate entity {}", entity); // CraftBukkit // paper
+
+ // Paper start
+ if (DEBUG_ENTITIES && entity.world.paperConfig.duplicateUUIDMode != PaperWorldConfig.DuplicateUUIDMode.NOTHING) {
+ if (entity1.addedToWorldStack != null) {
+ entity1.addedToWorldStack.printStackTrace();
+ }
+
+ getAddToWorldStackTrace(entity).printStackTrace();
+ }
+ // Paper end
return true;
}
}