From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Zach Brown <zach.brown@destroystokyo.com>
Date: Sun, 2 Jul 2017 21:35:56 -0500
Subject: [PATCH] Block player logins during server shutdown


diff --git a/src/main/java/net/minecraft/server/network/LoginListener.java b/src/main/java/net/minecraft/server/network/LoginListener.java
index c45647f2d05ed6b170aad10c0a3fb94570d2dd90..401833b7aeb9955fad2a3f1fe51d195cf0131094 100644
--- a/src/main/java/net/minecraft/server/network/LoginListener.java
+++ b/src/main/java/net/minecraft/server/network/LoginListener.java
@@ -68,6 +68,12 @@ public class LoginListener implements PacketLoginInListener {
     }
 
     public void tick() {
+        // Paper start - Do not allow logins while the server is shutting down
+        if (!MinecraftServer.getServer().isRunning()) {
+            this.disconnect(org.bukkit.craftbukkit.util.CraftChatMessage.fromString(org.spigotmc.SpigotConfig.restartMessage)[0]);
+            return;
+        }
+        // Paper end
         if (this.g == LoginListener.EnumProtocolState.READY_TO_ACCEPT) {
             this.c();
         } else if (this.g == LoginListener.EnumProtocolState.DELAY_ACCEPT) {