PaperMC/Spigot-Server-Patches/Don-t-load-chunks-when-attempting-to-unload-a-chunk.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Wed, 8 Apr 2020 21:07:08 -0400
Subject: [PATCH] Don't load chunks when attempting to unload a chunk

Big Brain Logic

diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -0,0 +0,0 @@ public class CraftWorld implements World {
     @Override
     public boolean unloadChunkRequest(int x, int z) {
         org.spigotmc.AsyncCatcher.catchOp("chunk unload"); // Spigot
-        net.minecraft.server.IChunkAccess chunk = world.getChunkProvider().getChunkAt(x, z, ChunkStatus.FULL, false);
+        net.minecraft.server.IChunkAccess chunk = world.getChunkProvider().getChunkAtIfLoadedImmediately(x, z); // Paper
         if (chunk != null) {
             world.getChunkProvider().removeTicket(TicketType.PLUGIN, chunk.getPos(), 1, Unit.INSTANCE);
         }
@@ -0,0 +0,0 @@ public class CraftWorld implements World {
 
     private boolean unloadChunk0(int x, int z, boolean save) {
         org.spigotmc.AsyncCatcher.catchOp("chunk unload"); // Spigot
-        net.minecraft.server.Chunk chunk = (net.minecraft.server.Chunk) world.getChunkProvider().getChunkAt(x, z, ChunkStatus.FULL, false);
+        net.minecraft.server.Chunk chunk = world.getChunkProvider().getChunkAtIfLoadedImmediately(x, z); // Paper
         if (chunk == null) {
             return true;
         }