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193 lines
10 KiB
Diff
193 lines
10 KiB
Diff
From 0000000000000000000000000000000000000000 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 297adb65c486abccd42cdb3b042e651a767c69cf..ce892ab0a2f5c648c1e6f4b3d4332102ae7b8be2 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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@@ -464,6 +464,45 @@ public class PaperWorldConfig {
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preventMovingIntoUnloadedChunks = getBoolean("prevent-moving-into-unloaded-chunks", false);
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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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public boolean countAllMobsForSpawning = false;
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private void countAllMobsForSpawning() {
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countAllMobsForSpawning = getBoolean("count-all-mobs-for-spawning", false);
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diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
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index ef7ef7fa4116e0def1d73e604ee706deb4c94330..e08245037aeb6fd8a24ae7402b5853933e5eed34 100644
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--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
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+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
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@@ -1,6 +1,7 @@
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package net.minecraft.server.level;
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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.ImmutableList.Builder;
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import com.google.common.collect.Iterables;
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@@ -32,13 +33,17 @@ import java.io.Writer;
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import java.nio.file.Path;
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import java.util.ArrayList;
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import java.util.BitSet;
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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.CompletionStage;
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@@ -871,6 +876,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
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entity.discard();
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needsRemoval = true;
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}
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+ checkDupeUUID(world, entity); // Paper
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return !needsRemoval;
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}));
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// CraftBukkit end
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@@ -921,6 +927,43 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
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});
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}
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+ // Paper start
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+ private static void checkDupeUUID(ServerLevel level, Entity entity) {
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+ PaperWorldConfig.DuplicateUUIDMode mode = level.paperConfig.duplicateUUIDMode;
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+ if (mode != PaperWorldConfig.DuplicateUUIDMode.WARN
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+ && mode != PaperWorldConfig.DuplicateUUIDMode.DELETE
|
|
+ && mode != PaperWorldConfig.DuplicateUUIDMode.SAFE_REGEN) {
|
|
+ return;
|
|
+ }
|
|
+ Entity other = level.getEntity(entity.getUUID());
|
|
+
|
|
+ if (mode == PaperWorldConfig.DuplicateUUIDMode.SAFE_REGEN && other != null && !other.isRemoved()
|
|
+ && Objects.equals(other.getEncodeId(), entity.getEncodeId())
|
|
+ && entity.getBukkitEntity().getLocation().distance(other.getBukkitEntity().getLocation()) < level.paperConfig.duplicateUUIDDeleteRange
|
|
+ ) {
|
|
+ if (ServerLevel.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.discard();
|
|
+ return;
|
|
+ }
|
|
+ if (other != null && !other.isRemoved()) {
|
|
+ switch (mode) {
|
|
+ case SAFE_REGEN: {
|
|
+ entity.setUUID(UUID.randomUUID());
|
|
+ if (ServerLevel.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 (ServerLevel.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.discard();
|
|
+ break;
|
|
+ }
|
|
+ default:
|
|
+ if (ServerLevel.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<LevelChunk, ChunkHolder.ChunkLoadingFailure>> prepareTickingChunk(ChunkHolder holder) {
|
|
ChunkPos chunkcoordintpair = holder.getPos();
|
|
CompletableFuture<Either<List<ChunkAccess>, ChunkHolder.ChunkLoadingFailure>> completablefuture = this.getChunkRangeFuture(chunkcoordintpair, 1, (i) -> {
|
|
diff --git a/src/main/java/net/minecraft/world/level/entity/PersistentEntitySectionManager.java b/src/main/java/net/minecraft/world/level/entity/PersistentEntitySectionManager.java
|
|
index dfd1afc57664dd18c11f8a2547616074ccc55690..e55ec74ac0363def04c2d7bf1b2a9d873388ea70 100644
|
|
--- a/src/main/java/net/minecraft/world/level/entity/PersistentEntitySectionManager.java
|
|
+++ b/src/main/java/net/minecraft/world/level/entity/PersistentEntitySectionManager.java
|
|
@@ -78,7 +78,22 @@ public class PersistentEntitySectionManager<T extends EntityAccess> implements A
|
|
|
|
private boolean addEntityUuid(T entity) {
|
|
if (!this.knownUuids.add(entity.getUUID())) {
|
|
+ // Paper start
|
|
+ T conflict = this.visibleEntityStorage.getEntity(entity.getUUID());
|
|
+ if (conflict != null && ((Entity) conflict).isRemoved()) {
|
|
+ stopTracking(conflict); // remove the existing entity
|
|
+ return true;
|
|
+ }
|
|
+ // Paper end
|
|
PersistentEntitySectionManager.LOGGER.warn("UUID of added entity already exists: {}", entity);
|
|
+ // Paper start
|
|
+ if (net.minecraft.world.level.Level.DEBUG_ENTITIES && ((Entity) entity).level.paperConfig.duplicateUUIDMode != com.destroystokyo.paper.PaperWorldConfig.DuplicateUUIDMode.NOTHING) {
|
|
+ if (((Entity) entity).addedToWorldStack != null) {
|
|
+ ((Entity) entity).addedToWorldStack.printStackTrace();
|
|
+ }
|
|
+ net.minecraft.server.level.ServerLevel.getAddToWorldStackTrace((net.minecraft.world.entity.Entity) entity).printStackTrace();
|
|
+ }
|
|
+ // Paper end
|
|
return false;
|
|
} else {
|
|
return true;
|