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0ea3083817
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: 1e843b72 #510: Add NamespacedKey#fromString() to fetch from user input a4d18241 #581: Add methods to modify despawn delay for wandering villagers CraftBukkit Changes: 0cd8f19f #802: Add methods to modify despawn delay for wandering villagers d5c5d998 SPIGOT-6362: ConcurrentModificationException: null --> Server Crash 8c7d69fe SPIGOT-5228: Entities that are removed during chunk unloads are not properly removed from the chunk.
80 lines
3.7 KiB
Diff
80 lines
3.7 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: Sun, 29 Mar 2020 18:26:14 -0400
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Subject: [PATCH] Ensure Entity is never double registered
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If something calls register twice, and the world is ticking, it could be
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enqueued to add twice.
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Vs behavior of non ticking of just overwriting state.
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We will now simply log a warning when this happens instead of crashing the server.
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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 f124527c4f727383c6da4eaa503b69112b583e32..874dddc5d70dc149c272855a98ed858867dd2bb6 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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@@ -59,6 +59,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
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}
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// Paper start
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+ boolean isQueuedForRegister = false;
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public static Random SHARED_RANDOM = new Random() {
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private boolean locked = false;
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@Override
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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 fb9c55a864ce3fd646e9576b2feede70ab759bbc..95b25bb17d9d4b025047b01909a880da26e59146 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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@@ -535,6 +535,7 @@ public class WorldServer extends World implements GeneratorAccessSeed {
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Entity entity2;
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while ((entity2 = (Entity) this.entitiesToAdd.poll()) != null) {
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+ if (!entity2.isQueuedForRegister) continue; // Paper - ignore cancelled registers
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this.registerEntity(entity2);
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}
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@@ -1292,6 +1293,19 @@ public class WorldServer extends World implements GeneratorAccessSeed {
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public void unregisterEntity(Entity entity) {
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org.spigotmc.AsyncCatcher.catchOp("entity unregister"); // Spigot
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+ // Paper start - fix entity registration issues
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+ if (entity instanceof EntityComplexPart) {
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+ // Usually this is a no-op for complex parts, and ID's should be removed, but go ahead and remove it anyways
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+ // Dragon parts are handled special in register. they don't receive a valid = true or register by UUID etc.
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+ this.entitiesById.remove(entity.getId(), entity);
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+ return;
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+ }
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+ if (!entity.valid) {
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+ // Someone called remove before we ever got added, cancel the add.
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+ entity.isQueuedForRegister = false;
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+ return;
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+ }
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+ // Paper end
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// Spigot start
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if ( entity instanceof EntityHuman )
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{
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@@ -1358,9 +1372,21 @@ public class WorldServer extends World implements GeneratorAccessSeed {
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private void registerEntity(Entity entity) {
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org.spigotmc.AsyncCatcher.catchOp("entity register"); // Spigot
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+ // Paper start - don't double enqueue entity registration
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+ //noinspection ObjectEquality
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+ if (this.entitiesById.get(entity.getId()) == entity) {
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+ LOGGER.error(entity + " was already registered!");
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+ new Throwable().printStackTrace();
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+ return;
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+ }
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+ // Paper end
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if (this.tickingEntities) {
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- this.entitiesToAdd.add(entity);
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+ if (!entity.isQueuedForRegister) { // Paper
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+ this.entitiesToAdd.add(entity);
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+ entity.isQueuedForRegister = true; // Paper
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+ }
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} else {
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+ entity.isQueuedForRegister = false; // Paper
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this.entitiesById.put(entity.getId(), entity);
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if (entity instanceof EntityEnderDragon) {
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EntityComplexPart[] aentitycomplexpart = ((EntityEnderDragon) entity).eJ();
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