From 7831132f199ac9b62f9403905bf5becf3824d51a Mon Sep 17 00:00:00 2001
From: Jedediah Smith <jedediah@silencegreys.com>
Date: Tue, 29 Mar 2016 20:19:20 -0400
Subject: [PATCH] Fix some players not being kicked on shutdown


diff --git a/src/main/java/net/minecraft/server/PlayerList.java b/src/main/java/net/minecraft/server/PlayerList.java
index 9865c4b..e6a4490 100644
--- a/src/main/java/net/minecraft/server/PlayerList.java
+++ b/src/main/java/net/minecraft/server/PlayerList.java
@@ -1297,9 +1297,11 @@ public abstract class PlayerList {
     }
 
     public void u() {
-        for (int i = 0; i < this.players.size(); ++i) {
-            ((EntityPlayer) this.players.get(i)).playerConnection.disconnect(this.server.server.getShutdownMessage()); // CraftBukkit - add custom shutdown message
+        // Paper start - Fix players being skipped due to concurrent list modification
+        for (EntityPlayer player : com.google.common.collect.ImmutableList.copyOf(this.players)) {
+            player.playerConnection.disconnect(this.server.server.getShutdownMessage()); // CraftBukkit - add custom shutdown message
         }
+        // Paper end
 
     }
 
-- 
2.9.0