From f3e56d282ebcb4fa298a8cb2c3696ee013d1a9d5 Mon Sep 17 00:00:00 2001
From: chris <github@onechris.mozmail.com>
Date: Wed, 20 Dec 2023 16:35:48 +0100
Subject: [PATCH] Gracefully fail on older spigot builds due to outdated netty
 (#4355)

* Test for outdated netty to avoid https://github.com/GeyserMC/Geyser/issues/3814

* capitalization

* bad spigot, go paper
---
 .../geyser/platform/spigot/GeyserSpigotPlugin.java    | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/bootstrap/spigot/src/main/java/org/geysermc/geyser/platform/spigot/GeyserSpigotPlugin.java b/bootstrap/spigot/src/main/java/org/geysermc/geyser/platform/spigot/GeyserSpigotPlugin.java
index 02ea91cf2..62a1e3f02 100644
--- a/bootstrap/spigot/src/main/java/org/geysermc/geyser/platform/spigot/GeyserSpigotPlugin.java
+++ b/bootstrap/spigot/src/main/java/org/geysermc/geyser/platform/spigot/GeyserSpigotPlugin.java
@@ -135,6 +135,17 @@ public class GeyserSpigotPlugin extends JavaPlugin implements GeyserBootstrap {
             }
         }
 
+        try {
+            Class.forName("io.netty.util.internal.ObjectPool.ObjectCreator");
+        } catch (ClassNotFoundException e) {
+            getLogger().severe("*********************************************");
+            getLogger().severe("");
+            getLogger().severe("This version of Spigot is using an outdated version of netty. Please use Paper instead!");
+            getLogger().severe("");
+            getLogger().severe("*********************************************");
+            return;
+        }
+
         // This is manually done instead of using Bukkit methods to save the config because otherwise comments get removed
         try {
             if (!getDataFolder().exists()) {