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Paper/Spigot-Server-Patches/0379-Fix-issues-with-entity-loss-due-to-unloaded-chunks.patch

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More improvements to activation range, improve turtles improved the water code so that immunity wont trigger if the entity has the water pathfinder system active, so this improves support for all entities that know how to behave in water. Merged 2 EAR patches together, and removed an MCUtil method that doesnt have a purpose anymore
2018-10-05 05:18:46 +02:00
From 1e4ac163aedb580ae00b2bb02a1a2d8d14b808a6 Mon Sep 17 00:00:00 2001
Fix issues with entity loss due to unloaded chunks Vanilla has risk of losing entities by causing them to be removed from all chunks if they try to move into an unloaded chunk. This pretty much means high chance this entity will be lost in this scenario. There is another case that adding an entity to the world can fail if the chunk isn't loaded. Lots of the server is designed around addEntity never expecting to fail for these reasons, nor is it really logical. This change ensures the chunks are always loaded when entities are added to the world, or a valid entity moves between chunks. Hopefully will fix issues #1496 and #1434
2018-09-29 04:39:20 +02:00
From: Aikar <aikar@aikar.co>
Date: Fri, 28 Sep 2018 21:49:53 -0400
Subject: [PATCH] Fix issues with entity loss due to unloaded chunks
Vanilla has risk of losing entities by causing them to be
removed from all chunks if they try to move into an unloaded chunk.
This pretty much means high chance this entity will be lost in this scenario.
There is another case that adding an entity to the world can fail if
the chunk isn't loaded.
Lots of the server is designed around addEntity never expecting to fail for these reasons,
nor is it really logical.
This change ensures the chunks are always loaded when entities are
added to the world, or a valid entity moves between chunks.
diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
Optimize some light chunk access light calculations repeatedly looks up the same chunk while going down on the Y access. Pass the chunk to it to skip many round trips to the map lookup process. while the gains arent as big since we have last access cache, it should hopefully avoid many callstacks of depth and improve inlining, as well as avoids entering a synchronized code block. The avoiding of entering synchronized section is the main goal here.
2018-10-03 03:55:30 +02:00
index 4179ba7cd8..d659ffe9ba 100644
Fix issues with entity loss due to unloaded chunks Vanilla has risk of losing entities by causing them to be removed from all chunks if they try to move into an unloaded chunk. This pretty much means high chance this entity will be lost in this scenario. There is another case that adding an entity to the world can fail if the chunk isn't loaded. Lots of the server is designed around addEntity never expecting to fail for these reasons, nor is it really logical. This change ensures the chunks are always loaded when entities are added to the world, or a valid entity moves between chunks. Hopefully will fix issues #1496 and #1434
2018-09-29 04:39:20 +02:00
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
Optimize some light chunk access light calculations repeatedly looks up the same chunk while going down on the Y access. Pass the chunk to it to skip many round trips to the map lookup process. while the gains arent as big since we have last access cache, it should hopefully avoid many callstacks of depth and improve inlining, as well as avoids entering a synchronized code block. The avoiding of entering synchronized section is the main goal here.
2018-10-03 03:55:30 +02:00
@@ -1146,7 +1146,7 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
Fix issues with entity loss due to unloaded chunks Vanilla has risk of losing entities by causing them to be removed from all chunks if they try to move into an unloaded chunk. This pretty much means high chance this entity will be lost in this scenario. There is another case that adding an entity to the world can fail if the chunk isn't loaded. Lots of the server is designed around addEntity never expecting to fail for these reasons, nor is it really logical. This change ensures the chunks are always loaded when entities are added to the world, or a valid entity moves between chunks. Hopefully will fix issues #1496 and #1434
2018-09-29 04:39:20 +02:00
int i = MathHelper.floor(entity.locX / 16.0D);
int j = MathHelper.floor(entity.locZ / 16.0D);
- boolean flag = entity.attachedToPlayer;
+ boolean flag = true; // Paper - always load chunks for entity adds
// Paper start - Set origin location when the entity is being added to the world
if (entity.origin == null) {
Optimize some light chunk access light calculations repeatedly looks up the same chunk while going down on the Y access. Pass the chunk to it to skip many round trips to the map lookup process. while the gains arent as big since we have last access cache, it should hopefully avoid many callstacks of depth and improve inlining, as well as avoids entering a synchronized code block. The avoiding of entering synchronized section is the main goal here.
2018-10-03 03:55:30 +02:00
@@ -1650,7 +1650,7 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
Fix issues with entity loss due to unloaded chunks Vanilla has risk of losing entities by causing them to be removed from all chunks if they try to move into an unloaded chunk. This pretty much means high chance this entity will be lost in this scenario. There is another case that adding an entity to the world can fail if the chunk isn't loaded. Lots of the server is designed around addEntity never expecting to fail for these reasons, nor is it really logical. This change ensures the chunks are always loaded when entities are added to the world, or a valid entity moves between chunks. Hopefully will fix issues #1496 and #1434
2018-09-29 04:39:20 +02:00
this.getChunkAt(entity.ae, entity.ag).a(entity, entity.af);
}
- if (!entity.bN() && !this.isChunkLoaded(i, k, true)) {
+ if (!entity.valid && !entity.bN() && !this.isChunkLoaded(i, k, true)) { // Paper - always load chunks to register valid entities location
entity.inChunk = false;
} else {
this.getChunkAt(i, k).a(entity);
--
2.19.0
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