From 182aaa84bf197b9a61ec3a79033457788c4f1188 Mon Sep 17 00:00:00 2001
From: md_5 <md_5@live.com.au>
Date: Tue, 11 Jun 2013 11:54:32 +1000
Subject: [PATCH] Prevent Shutdown Hang

Prevents server hanging if players disconnect during the shutdown sequence.

diff --git a/src/main/java/net/minecraft/server/PlayerList.java b/src/main/java/net/minecraft/server/PlayerList.java
index 07cee4d..1725bba 100644
--- a/src/main/java/net/minecraft/server/PlayerList.java
+++ b/src/main/java/net/minecraft/server/PlayerList.java
@@ -1115,8 +1115,15 @@ public abstract class PlayerList {
     }
 
     public void r() {
-        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
+        while (!this.players.isEmpty()) {
+            // Spigot start
+            EntityPlayer p = (EntityPlayer) this.players.get( 0 );
+            p.playerConnection.disconnect( this.server.server.getShutdownMessage() );
+            if ( ( !this.players.isEmpty() ) && ( this.players.get( 0 ) == p ) )
+            {
+                this.players.remove( 0 ); // Prevent shutdown hang if already disconnected
+            }
+            // Spigot end
         }
     }
 
-- 
1.8.3.2