mirror of
https://github.com/PaperMC/Paper.git
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263 lines
14 KiB
Diff
263 lines
14 KiB
Diff
From 0080550b42ff659ffcbaea501571e8c4208e4549 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 14:27:34 -0400
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Subject: [PATCH] Duplicate UUID Resolve Option
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Due to a bug in https://github.com/PaperMC/Paper/commit/2e29af3df05ec0a383f48be549d1c03200756d24
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which was added all the way back in March of 2016, it was unknown (potentially not at the time)
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that an entity might actually change the seed of the random object.
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At some point, EntitySquid did start setting the seed. Due to this shared random, this caused
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every entity to use a Random object with a predictable seed.
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This has caused entities to potentially generate with the same UUID....
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Over the years, servers have had entities disappear, but no sign of trouble
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because CraftBukkit removed the log lines indicating that something was wrong.
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We have fixed the root issue causing duplicate UUID's, however we now have chunk
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files full of entities that have the same UUID as another entity!
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When these chunks load, the 2nd entity will not be added to the world correctly.
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If that chunk loads in a different order in the future, then it will reverse and the
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missing one is now the one added to the world and not the other. This results in very
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inconsistent entity behavior.
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This change allows you to recover any duplicate entity by generating a new UUID for it.
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This also lets you delete them instead if you don't want to risk having new entities added to
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the world that you previously did not see.
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But for those who are ok with leaving this inconsistent behavior, you may use WARN or NOTHING options.
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It is recommended you regenerate the entities, as these were legit entities, and deserve your love.
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diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
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index 4ba72275b..572679e4d 100644
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--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
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+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
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@@ -442,4 +442,43 @@ public class PaperWorldConfig {
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log("Using vanilla redstone algorithm.");
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}
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}
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+
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+ public enum DuplicateUUIDMode {
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+ SAFE_REGEN, DELETE, NOTHING, WARN
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+ }
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+ public DuplicateUUIDMode duplicateUUIDMode = DuplicateUUIDMode.SAFE_REGEN;
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+ public int duplicateUUIDDeleteRange = 32;
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+ private void repairDuplicateUUID() {
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+ String desiredMode = getString("duplicate-uuid-resolver", "saferegen").toLowerCase().trim();
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+ duplicateUUIDDeleteRange = getInt("duplicate-uuid-saferegen-delete-range", duplicateUUIDDeleteRange);
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+ switch (desiredMode.toLowerCase()) {
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+ case "regen":
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+ case "regenerate":
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+ case "saferegen":
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+ case "saferegenerate":
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+ duplicateUUIDMode = DuplicateUUIDMode.SAFE_REGEN;
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+ log("Duplicate UUID Resolve: Regenerate New UUID if distant (Delete likely duplicates within " + duplicateUUIDDeleteRange + " blocks)");
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+ break;
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+ case "remove":
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+ case "delete":
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+ duplicateUUIDMode = DuplicateUUIDMode.DELETE;
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+ log("Duplicate UUID Resolve: Delete Entity");
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+ break;
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+ case "silent":
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+ case "nothing":
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+ duplicateUUIDMode = DuplicateUUIDMode.NOTHING;
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+ logError("Duplicate UUID Resolve: Do Nothing (no logs) - Warning, may lose indication of bad things happening");
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+ break;
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+ case "log":
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+ case "warn":
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+ duplicateUUIDMode = DuplicateUUIDMode.WARN;
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+ log("Duplicate UUID Resolve: Warn (do nothing but log it happened, may be spammy)");
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+ break;
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+ default:
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+ duplicateUUIDMode = DuplicateUUIDMode.WARN;
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+ logError("Warning: Invalid duplicate-uuid-resolver config " + desiredMode + " - must be one of: regen, delete, nothing, warn");
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+ log("Duplicate UUID Resolve: Warn (do nothing but log it happened, may be spammy)");
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+ break;
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+ }
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+ }
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}
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diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
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index c7c600b80..64c327669 100644
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--- a/src/main/java/net/minecraft/server/Chunk.java
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+++ b/src/main/java/net/minecraft/server/Chunk.java
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@@ -391,6 +391,7 @@ public class Chunk implements IChunkAccess {
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if (i != this.loc.x || j != this.loc.z) {
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Chunk.LOGGER.warn("Wrong location! ({}, {}) should be ({}, {}), {}", i, j, this.loc.x, this.loc.z, entity);
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entity.dead = true;
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+ return; // Paper
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}
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int k = MathHelper.floor(entity.locY() / 16.0D);
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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 716d30b8d..7c7cd851c 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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@@ -2743,6 +2743,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
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});
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}
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+ public void setUUID(UUID uuid) { a(uuid); } // Paper - OBFHELPER
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public void a(UUID uuid) {
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this.uniqueID = uuid;
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this.am = this.uniqueID.toString();
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diff --git a/src/main/java/net/minecraft/server/PlayerChunkMap.java b/src/main/java/net/minecraft/server/PlayerChunkMap.java
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index 7edca1744..314c77767 100644
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--- a/src/main/java/net/minecraft/server/PlayerChunkMap.java
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+++ b/src/main/java/net/minecraft/server/PlayerChunkMap.java
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@@ -1,6 +1,7 @@
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package net.minecraft.server;
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import co.aikar.timings.Timing; // Paper
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+import com.destroystokyo.paper.PaperWorldConfig; // Paper
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import com.google.common.collect.ImmutableList;
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import com.google.common.collect.Iterables;
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import com.google.common.collect.ComparisonChain; // Paper
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@@ -22,14 +23,17 @@ import java.io.File;
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import java.io.IOException;
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import java.io.Writer;
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import java.util.ArrayList;
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+import java.util.HashMap; // Paper
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import java.util.Collection;
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import java.util.Iterator;
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import java.util.List;
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+import java.util.Map; // Paper
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import java.util.Objects;
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import java.util.Optional;
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import java.util.Queue;
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import java.util.Set;
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import java.util.concurrent.CancellationException;
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+import java.util.UUID; // Paper
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import java.util.concurrent.CompletableFuture;
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import java.util.concurrent.CompletionException;
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import java.util.concurrent.Executor;
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@@ -602,19 +606,55 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
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for (int j = 0; j < i; ++j) {
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List<Entity> entityslice = aentityslice[j]; // Spigot
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- Iterator iterator = entityslice.iterator();
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-
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- while (iterator.hasNext()) {
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- Entity entity = (Entity) iterator.next();
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- // CraftBukkit start - these are spawned serialized (DefinedStructure) and we don't call an add event below at the moment due to ordering complexities
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- boolean needsRemoval = false;
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- if (chunk.needsDecoration && !this.world.getServer().getServer().getSpawnNPCs() && entity instanceof NPC) {
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- entity.die();
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- needsRemoval = true;
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- }
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- if (!(entity instanceof EntityHuman) && (needsRemoval || !this.world.addEntityChunk(entity))) {
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+ // Paper start
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+ PaperWorldConfig.DuplicateUUIDMode mode = world.paperConfig.duplicateUUIDMode;
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+ if (mode == PaperWorldConfig.DuplicateUUIDMode.WARN || mode == PaperWorldConfig.DuplicateUUIDMode.DELETE || mode == PaperWorldConfig.DuplicateUUIDMode.SAFE_REGEN) {
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+ Map<UUID, Entity> thisChunk = new HashMap<>();
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+ for (Iterator<Entity> iterator = ((List<Entity>) entityslice).iterator(); iterator.hasNext(); ) {
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+ Entity entity = iterator.next();
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+
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+ // CraftBukkit start - these are spawned serialized (DefinedStructure) and we don't call an add event below at the moment due to ordering complexities
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+ if (chunk.needsDecoration && !this.world.getServer().getServer().getSpawnNPCs() && entity instanceof NPC) {
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+ entity.die();
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+ }
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// CraftBukkit end
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+
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+ if (entity.dead || entity.valid) continue;
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+ Entity other = ((WorldServer) world).getEntity(entity.uniqueID);
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+ if (other == null || other.dead) {
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+ other = thisChunk.get(entity.uniqueID);
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+ }
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+
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+ if (mode == PaperWorldConfig.DuplicateUUIDMode.SAFE_REGEN && other != null && !other.dead
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+ && java.util.Objects.equals(other.getSaveID(), entity.getSaveID())
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+ && entity.getBukkitEntity().getLocation().distance(other.getBukkitEntity().getLocation()) < world.paperConfig.duplicateUUIDDeleteRange
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+ ) {
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+ 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.");
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+ entity.dead = true;
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+ iterator.remove();
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+ continue;
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+ }
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+ if (other != null && !other.dead) {
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+ switch (mode) {
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+ case SAFE_REGEN: {
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+ entity.setUUID(UUID.randomUUID());
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+ 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.");
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+ break;
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+ }
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+ case DELETE: {
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+ 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.");
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+ entity.dead = true;
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+ iterator.remove();
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+ break;
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+ }
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+ default:
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+ 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.");
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+ break;
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+ }
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+ }
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+ // Paper end
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+ if (!(entity instanceof EntityHuman) && (entity.dead || !this.world.addEntityChunk(entity))) { // Paper
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if (list == null) {
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list = Lists.newArrayList(new Entity[]{entity});
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} else {
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@@ -622,6 +662,7 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
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}
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}
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}
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+ } // Paper
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}
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if (list != null) {
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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 3c94aa48c..f973b0799 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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@@ -3,6 +3,8 @@ package net.minecraft.server;
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import com.google.common.annotations.VisibleForTesting;
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import co.aikar.timings.TimingHistory; // Paper
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import co.aikar.timings.Timings; // Paper
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+
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+import com.destroystokyo.paper.PaperWorldConfig; // Paper
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import com.google.common.collect.Lists;
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import com.google.common.collect.Maps;
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import com.google.common.collect.Queues;
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@@ -1055,8 +1057,23 @@ public class WorldServer extends World {
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if (entity1 == null) {
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return false;
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} else {
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- WorldServer.LOGGER.error("Keeping entity {} that already exists with UUID {}", EntityTypes.getName(entity1.getEntityType()), entity.getUniqueID().toString()); // CraftBukkit // paper
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- WorldServer.LOGGER.error("Deleting duplicate entity {}", entity); // CraftBukkit // paper
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+ // Paper start
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+ if (entity1.dead) {
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+ unregisterEntity(entity1); // remove the existing entity
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+ return false;
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+ }
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+
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+ if (DEBUG_ENTITIES && entity.world.paperConfig.duplicateUUIDMode != PaperWorldConfig.DuplicateUUIDMode.NOTHING) {
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+ WorldServer.LOGGER.error("Keeping entity {} that already exists with UUID {}", EntityTypes.getName(entity1.getEntityType()), entity.getUniqueID().toString()); // CraftBukkit // paper
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+ WorldServer.LOGGER.error("Deleting duplicate entity {}", entity); // CraftBukkit // 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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+
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+ getAddToWorldStackTrace(entity).printStackTrace();
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+ }
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+ // Paper end
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return true;
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}
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}
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@@ -1195,7 +1212,7 @@ public class WorldServer extends World {
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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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+ if (old != null && old.getId() != entity.getId() && old.valid && entity.world.paperConfig.duplicateUUIDMode != com.destroystokyo.paper.PaperWorldConfig.DuplicateUUIDMode.NOTHING) { // Paper
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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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--
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2.25.0.windows.1
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