testserver/Spigot-Server-Patches/0467-Delay-unsafe-actions-u...

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From aa1a9266fcdeb4ffc727142df482ebca0d03828d Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sat, 11 Apr 2020 21:23:42 -0400
Subject: [PATCH] Delay unsafe actions until after entity ticking is done
This will help prevent many cases of unregistering entities during entity ticking
diff --git a/src/main/java/net/minecraft/server/PlayerChunk.java b/src/main/java/net/minecraft/server/PlayerChunk.java
index a9a2ce3d3f..24cb88559b 100644
--- a/src/main/java/net/minecraft/server/PlayerChunk.java
+++ b/src/main/java/net/minecraft/server/PlayerChunk.java
@@ -490,8 +490,11 @@ public class PlayerChunk {
// Minecraft will apply the chunks tick lists to the world once the chunk got loaded, and then store the tick
// lists again inside the chunk once the chunk becomes inaccessible and set the chunk's needsSaving flag.
// These actions may however happen deferred, so we manually set the needsSaving flag already here.
+ // Paper start
+ ((WorldServer) chunk.world).doIfNotEntityTicking(() -> { // Paper
chunk.setNeedsSaving(true);
chunk.unloadCallback();
+ }); // Paper
});
}
}).exceptionally((throwable) -> {
diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java
index cd8266f675..84a3367b87 100644
--- a/src/main/java/net/minecraft/server/WorldServer.java
+++ b/src/main/java/net/minecraft/server/WorldServer.java
@@ -60,6 +60,16 @@ public class WorldServer extends World {
private final Queue<Entity> entitiesToAdd = Queues.newArrayDeque();
public final List<EntityPlayer> players = Lists.newArrayList(); // Paper - private -> public
boolean tickingEntities;
+ // Paper start
+ List<java.lang.Runnable> afterEntityTickingTasks = Lists.newArrayList();
+ public void doIfNotEntityTicking(java.lang.Runnable run) {
+ if (tickingEntities) {
+ afterEntityTickingTasks.add(run);
+ } else {
+ run.run();
+ }
+ }
+ // Paper end
private final MinecraftServer server;
private final WorldNBTStorage dataManager;
public boolean savingDisabled;
@@ -519,6 +529,16 @@ public class WorldServer extends World {
timings.entityTick.stopTiming(); // Spigot
this.tickingEntities = false;
+ // Paper start
+ for (java.lang.Runnable run : this.afterEntityTickingTasks) {
+ try {
+ run.run();
+ } catch (Exception e) {
+ LOGGER.error("Error in After Entity Ticking Task", e);
+ }
+ }
+ this.afterEntityTickingTasks.clear();
+ // Paper end
this.getMinecraftServer().midTickLoadChunks(); // Paper
try (co.aikar.timings.Timing ignored = this.timings.newEntities.startTiming()) { // Paper - timings
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 1fbb1344fc..f56131e3a5 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -2469,7 +2469,7 @@ public class CraftWorld implements World {
CompletableFuture<Chunk> ret = new CompletableFuture<>();
this.world.getChunkProvider().getChunkAtAsynchronously(x, z, gen, (net.minecraft.server.Chunk chunk) -> {
- ret.complete(chunk == null ? null : chunk.bukkitChunk);
+ this.world.doIfNotEntityTicking(() -> ret.complete(chunk == null ? null : chunk.bukkitChunk));
});
return ret;
--
2.25.1