Mark chunk as active if ChunkUnloadEvent is cancelled

Potentially related to GH-169

Spigot-Server-Patches/0013-Player-Exhaustion-Multipliers.patch

@@ -1,4 +1,4 @@
-From 20f4010aef693e1da12b34b5322ecedac5abb53c Mon Sep 17 00:00:00 2001
+From cde3b788b4a629944ca36ec406ab7a384b4c273b Mon Sep 17 00:00:00 2001
 From: gsand <gsandowns@gmail.com>
 Date: Tue, 1 Mar 2016 13:43:16 -0600
 Subject: [PATCH] Player Exhaustion Multipliers
@@ -36,10 +36,10 @@ index 88e1e98..0f71013 100644
              ItemStack itemstack1 = this.u(iblockdata);
  
 diff --git a/src/main/java/net/minecraft/server/EntityHuman.java b/src/main/java/net/minecraft/server/EntityHuman.java
-index e1bb5c5..11388ab 100644
+index ad57082..46c826c 100644
 --- a/src/main/java/net/minecraft/server/EntityHuman.java
 +++ b/src/main/java/net/minecraft/server/EntityHuman.java
-@@ -1451,13 +1451,13 @@ public abstract class EntityHuman extends EntityLiving {
+@@ -1448,13 +1448,13 @@ public abstract class EntityHuman extends EntityLiving {
                  i = Math.round(MathHelper.sqrt(d0 * d0 + d1 * d1 + d2 * d2) * 100.0F);
                  if (i > 0) {
                      this.a(StatisticList.q, i);
@@ -56,5 +56,5 @@ index e1bb5c5..11388ab 100644
              } else if (this.n_()) {
                  if (d1 > 0.0D) {
 -- 
-2.7.4
+2.8.0
 

Spigot-Server-Patches/0026-Entity-Origin-API.patch

@@ -1,4 +1,4 @@
-From 2dfb9ed0eaf09ab4ca3ea4f5aa68596cdf8c6235 Mon Sep 17 00:00:00 2001
+From 2b9bf67504d0f896fddad31118b8d6d0e55045f2 Mon Sep 17 00:00:00 2001
 From: Byteflux <byte@byteflux.net>
 Date: Tue, 1 Mar 2016 23:45:08 -0600
 Subject: [PATCH] Entity Origin API
@@ -81,7 +81,7 @@ index 564ea37..1113b1c 100644
  
      public EntityLiving getSource() {
 diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
-index 72d0f5c..3f4bc0f 100644
+index 0460dc5..87236e8 100644
 --- a/src/main/java/net/minecraft/server/World.java
 +++ b/src/main/java/net/minecraft/server/World.java
 @@ -948,6 +948,12 @@ public abstract class World implements IBlockAccess {
@@ -98,10 +98,10 @@ index 72d0f5c..3f4bc0f 100644
              flag = true;
          }
 diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
-index 8a1df54..f61f6cd 100644
+index 908dcee..f4168c4 100644
 --- a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
 +++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
-@@ -604,4 +604,12 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
+@@ -603,4 +603,12 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
          return spigot;
      }
      // Spigot end

Spigot-Server-Patches/0098-Optimize-Chunk-Unload-Queue.patch

@@ -1,4 +1,4 @@
-From 8fd1f5dfead2200e93116763999f776de862a848 Mon Sep 17 00:00:00 2001
+From c9723ad854bc3dc21412e28c3a7914e9a97768fd Mon Sep 17 00:00:00 2001
 From: Aikar <aikar@aikar.co>
 Date: Fri, 18 Mar 2016 17:57:25 -0400
 Subject: [PATCH] Optimize Chunk Unload Queue
@@ -36,7 +36,7 @@ index 8b11266..ac35cf4 100644
  
      // CraftBukkit start - Neighbor loaded cache for chunk lighting and entity ticking
 diff --git a/src/main/java/net/minecraft/server/ChunkProviderServer.java b/src/main/java/net/minecraft/server/ChunkProviderServer.java
-index 450bf9b..f5a2580 100644
+index 450bf9b..5485a66 100644
 --- a/src/main/java/net/minecraft/server/ChunkProviderServer.java
 +++ b/src/main/java/net/minecraft/server/ChunkProviderServer.java
 @@ -21,7 +21,7 @@ import org.bukkit.event.world.ChunkUnloadEvent;
@@ -147,7 +147,7 @@ index 450bf9b..f5a2580 100644
                  if (chunk.hasLightUpdates()) continue; // Paper - Don't unload chunks with pending light updates.
  
                  ChunkUnloadEvent event = new ChunkUnloadEvent(chunk.bukkitChunk);
-@@ -320,7 +340,7 @@ public class ChunkProviderServer implements IChunkProvider {
+@@ -320,13 +340,18 @@ public class ChunkProviderServer implements IChunkProvider {
                                  continue;
                              }
  
@@ -156,7 +156,18 @@ index 450bf9b..f5a2580 100644
                              if (neighbor != null) {
                                  neighbor.setNeighborUnloaded(-x, -z);
                                  chunk.setNeighborUnloaded(x, z);
-@@ -362,4 +382,69 @@ public class ChunkProviderServer implements IChunkProvider {
+                             }
+                         }
+                     }
++                // Paper start
++                } else {
++                    // Unload event is cancelled, make sure this chunk is marked active
++                    markChunkActive(chunk);
++                // Paper end
+                 }
+             }
+             // CraftBukkit end
+@@ -362,4 +387,69 @@ public class ChunkProviderServer implements IChunkProvider {
      public boolean e(int i, int j) {
          return this.chunks.containsKey(LongHash.toLong(i, j)); // CraftBukkit
      }
@@ -240,7 +251,7 @@ index 63e118d..721bcae 100644
                  i += server.getChunkAt( x, z ).entityCount.get( oClass );
              }
 diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
-index f76ff72..c1cb133 100644
+index d658fa2..0a3cfbc 100644
 --- a/src/main/java/net/minecraft/server/World.java
 +++ b/src/main/java/net/minecraft/server/World.java
 @@ -159,9 +159,15 @@ public abstract class World implements IBlockAccess {