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/ServerLoginPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
index 453a9dd794c39be5e7221b05fabb71b802691003..897b72d230976594c33cdb80706e9ce594d0b0f5 100644
--- a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
@@ -71,6 +71,12 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener,
 
     @Override
     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.state == ServerLoginPacketListenerImpl.State.READY_TO_ACCEPT) {
             this.handleAcceptedLogin();
         } else if (this.state == ServerLoginPacketListenerImpl.State.DELAY_ACCEPT) {