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 7a9094e69684c2d963411525a09872024c6f62e3..6e9e0385881c60c6921b06663869546f7c852804 100644
--- a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
@@ -72,6 +72,12 @@ 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.VERIFYING) {
             this.verifyLoginAndFinishConnectionSetup((GameProfile) Objects.requireNonNull(this.authenticatedProfile));
         }