From 30ff596e33f0ee629ff67ef52d067a7957ef540d Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Thu, 12 May 2016 02:03:56 -0400
Subject: [PATCH] Fix Chunk Unload Queue Issues

Vanilla implemented similar logic as Paper had pre 1.9.4, but Spigot
has not resolved all the bugs with the changes.

This patch fixes known issues and really should be applied by Spigot team.

diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
index 695c6d3b70..acc21aec02 100644
--- a/src/main/java/net/minecraft/server/Chunk.java
+++ b/src/main/java/net/minecraft/server/Chunk.java
@@ -58,7 +58,7 @@ public class Chunk implements IChunkAccess {
     private long A; public long getInhabitedTime() { return A; } // Paper - OBFHELPER
     private int B;
     private final ConcurrentLinkedQueue<BlockPosition> C;
-    public boolean d;
+    public boolean d; public void setShouldUnload(boolean unload) { this.d = unload; } public boolean isUnloading() { return d; } // Paper - OBFHELPER
     private ChunkStatus D;
     private int E;
     private final AtomicInteger F;
diff --git a/src/main/java/net/minecraft/server/ChunkProviderServer.java b/src/main/java/net/minecraft/server/ChunkProviderServer.java
index 6917fdbe04..bac5c921b6 100644
--- a/src/main/java/net/minecraft/server/ChunkProviderServer.java
+++ b/src/main/java/net/minecraft/server/ChunkProviderServer.java
@@ -301,6 +301,7 @@ public class ChunkProviderServer implements IChunkProvider {
 
                     if (chunk != null && chunk.d) {
                         // CraftBukkit start - move unload logic to own method
+                        chunk.setShouldUnload(false); // Paper
                         if (!unloadChunk(chunk, true)) {
                             continue;
                         }
-- 
2.18.0