210a32f26f
Due to some complexity in mojangs complicated chain of juggling whether or not a chunk should be unloaded when the last ticket is removed, many chunks are remaining around in the cache. These chunks are never being targetted for unload because they are vastly out of view distance range and have no reason to be looked at. This is a huge issue for performance because we have to iterate these chunks EVERY TICK... This is what's been leading to high SELF time in Ticking Chunks timings/profiler results. We will now detect these chunks in that iteration, and automatically add it to the unload queue when the chunk is found without any tickets.
49 lines
2.9 KiB
Diff
49 lines
2.9 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: Thu, 2 Apr 2020 01:42:39 -0400
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Subject: [PATCH] Prevent Double PlayerChunkMap adds crashing server
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Suspected case would be around the technique used in .stopRiding
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Stack will identify any causer of this and warn instead of crashing.
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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 b1f1372a76167a29f63917cedd1d6bfc99a97eba..c900bfb9edf957ebdbd83cc44280440648288250 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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@@ -1447,6 +1447,14 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
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protected void addEntity(Entity entity) {
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org.spigotmc.AsyncCatcher.catchOp("entity track"); // Spigot
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+ // Paper start - ignore and warn about illegal addEntity calls instead of crashing server
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+ if (!entity.valid || entity.world != this.world || this.trackedEntities.containsKey(entity.getId())) {
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+ new Throwable("[ERROR] Illegal PlayerChunkMap::addEntity for world " + this.world.getWorld().getName()
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+ + ": " + entity + (this.trackedEntities.containsKey(entity.getId()) ? " ALREADY CONTAINED (This would have crashed your server)" : ""))
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+ .printStackTrace();
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+ return;
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+ }
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+ // Paper end
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if (!(entity instanceof EntityComplexPart)) {
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if (!(entity instanceof EntityLightning)) {
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EntityTypes<?> entitytypes = entity.getEntityType();
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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 255650fc6adcd81df2ee063209d2098745e45e39..c1e3c5ad7bbadedf01f7bd9162602398b81005a2 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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@@ -1463,7 +1463,7 @@ public class WorldServer extends World {
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}
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}
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- this.getChunkProvider().addEntity(entity);
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+ // this.getChunkProvider().addEntity(entity); // Paper - moved down below valid=true
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// CraftBukkit start - SPIGOT-5278
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if (entity instanceof EntityDrowned) {
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this.navigators.add(((EntityDrowned) entity).navigationWater);
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@@ -1474,6 +1474,7 @@ public class WorldServer extends World {
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this.navigators.add(((EntityInsentient) entity).getNavigation());
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}
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entity.valid = true; // CraftBukkit
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+ this.getChunkProvider().addEntity(entity); // Paper - from above to be below valid=true
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// Paper start - Set origin location when the entity is being added to the world
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if (entity.origin == null) {
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entity.origin = entity.getBukkitEntity().getLocation();
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