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Upstream has released updates that appear 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: cfd18bd0 SPIGOT-6436: Add Player#stopAllSounds CraftBukkit Changes: b58f4299 SPIGOT-6436: Add Player#stopAllSounds eb191612 SPIGOT-6783: Items do not appear in custom anvil inventories 376edf4f SPIGOT-6779: Fix LivingEntity#attack for Player entities 747a73ec SPIGOT-6772: Use entity mailbox and re-schedule entities if they get unloaded
194 lines
10 KiB
Diff
194 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 2bfab88523bd5825db29b6a00b5bc1aa40324de8..031829d1ba1e859368878245fe0edb6fbe726821 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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@@ -407,6 +407,45 @@ 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 41253d8adf85cf318fcb1cee36ac1763f440fca6..ba1514301a8b20fcc594ae5555b491e88a98e6dd 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.Iterables;
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import com.google.common.collect.ComparisonChain; // Paper
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@@ -24,13 +25,17 @@ 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.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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@@ -836,6 +841,7 @@ 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(worldserver, entity); // Paper
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return !needsRemoval;
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}));
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// CraftBukkit end
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@@ -885,6 +891,43 @@ 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
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+ && mode != PaperWorldConfig.DuplicateUUIDMode.SAFE_REGEN) {
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+ return;
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+ }
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+ Entity other = level.getEntity(entity.getUUID());
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+
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+ if (mode == PaperWorldConfig.DuplicateUUIDMode.SAFE_REGEN && other != null && !other.isRemoved()
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+ && Objects.equals(other.getEncodeId(), entity.getEncodeId())
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+ && entity.getBukkitEntity().getLocation().distance(other.getBukkitEntity().getLocation()) < level.paperConfig.duplicateUUIDDeleteRange
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+ ) {
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+ if (Level.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.discard();
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+ return;
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+ }
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+ if (other != null && !other.isRemoved()) {
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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 (Level.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 (Level.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.discard();
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+ break;
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+ }
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+ default:
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+ if (Level.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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+ }
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+ // Paper end
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public CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>> prepareTickingChunk(ChunkHolder holder) {
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ChunkPos chunkcoordintpair = holder.getPos();
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CompletableFuture<Either<List<ChunkAccess>, ChunkHolder.ChunkLoadingFailure>> completablefuture = this.getChunkRangeFuture(chunkcoordintpair, 1, (i) -> {
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diff --git a/src/main/java/net/minecraft/world/level/entity/PersistentEntitySectionManager.java b/src/main/java/net/minecraft/world/level/entity/PersistentEntitySectionManager.java
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index 23640964305b7f2ffd54ed3044712308f03c3d42..f698723f8f7feecc749df10a316118184391f31a 100644
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--- a/src/main/java/net/minecraft/world/level/entity/PersistentEntitySectionManager.java
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+++ b/src/main/java/net/minecraft/world/level/entity/PersistentEntitySectionManager.java
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@@ -78,7 +78,22 @@ public class PersistentEntitySectionManager<T extends EntityAccess> implements A
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private boolean addEntityUuid(T entity) {
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if (!this.knownUuids.add(entity.getUUID())) {
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+ // Paper start
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+ T conflict = this.visibleEntityStorage.getEntity(entity.getUUID());
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+ if (conflict != null && ((Entity) conflict).isRemoved()) {
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+ stopTracking(conflict); // remove the existing entity
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+ return true;
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+ }
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+ // Paper end
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PersistentEntitySectionManager.LOGGER.warn("UUID of added entity already exists: {}", entity);
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+ // Paper start
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+ if (net.minecraft.world.level.Level.DEBUG_ENTITIES && ((Entity) entity).level.paperConfig.duplicateUUIDMode != com.destroystokyo.paper.PaperWorldConfig.DuplicateUUIDMode.NOTHING) {
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+ if (((Entity) entity).addedToWorldStack != null) {
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+ ((Entity) entity).addedToWorldStack.printStackTrace();
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+ }
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+ net.minecraft.server.level.ServerLevel.getAddToWorldStackTrace((net.minecraft.world.entity.Entity) 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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return true;
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