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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Fri, 18 Mar 2016 13:50:14 -0400
Subject: [PATCH] Remove Metadata on reload

Metadata is not meant to persist reload as things break badly with non primitive types
This will remove metadata on reload so it does not crash everything if a plugin uses it.

diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index 2b0f69b89d69258a1e9a6a81db5c9d4497417cd7..b7539a5f7bc20f20f3cd7fb30d87ab7ffc1133c3 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -1003,8 +1003,16 @@ public final class CraftServer implements Server {
             world.spigotConfig.init(); // Spigot
         }
 
+        Plugin[] pluginClone = pluginManager.getPlugins().clone(); // Paper
         this.pluginManager.clearPlugins();
         this.commandMap.clearCommands();
+        // Paper start
+        for (Plugin plugin : pluginClone) {
+            entityMetadata.removeAll(plugin);
+            worldMetadata.removeAll(plugin);
+            playerMetadata.removeAll(plugin);
+        }
+        // Paper end
         this.reloadData();
         org.spigotmc.SpigotConfig.registerCommands(); // Spigot
         io.papermc.paper.command.PaperCommands.registerCommands(this.console); // Paper