PaperMC/Spigot-Server-Patches/Don-t-create-a-chunk-just-to-unload-it.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Wed, 2 Mar 2016 23:55:20 -0600
Subject: [PATCH] Don't create a chunk just to unload it


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 {
     }
 
     private boolean unloadChunk0(int x, int z, boolean save, boolean safe) {
-        net.minecraft.server.Chunk chunk = world.getChunkProviderServer().getChunkAt(x, z);
+        // Paper start - Don't create a chunk just to unload it
+        net.minecraft.server.Chunk chunk = world.getChunkProviderServer().getChunkIfLoaded(x, z);
+        if (chunk == null) {
+            return false;
+        }
+        // Paper end
+
         if (chunk.mustSave) {   // If chunk had previously been queued to save, must do save to avoid loss of that data
             save = true;
         }
--