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path: root/patches/server/0111-Cache-user-authenticator-threads.patch
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Alfie Cleveland <alfeh@me.com>
Date: Fri, 25 Nov 2016 13:22:40 +0000
Subject: [PATCH] Cache user authenticator threads


diff --git a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
index bcf189d0ae917b99fff62167740ddb0012082138..71581c619d369d443908ed475d9a4d2d6ef07e5c 100644
--- a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
@@ -118,6 +118,8 @@ public class ServerLoginPacketListenerImpl implements TickablePacketListener, Se
 
     }
 
+    private static final java.util.concurrent.ExecutorService authenticatorPool = new java.util.concurrent.ThreadPoolExecutor(0, 16, 60L, java.util.concurrent.TimeUnit.SECONDS, new java.util.concurrent.SynchronousQueue<>(),  new com.google.common.util.concurrent.ThreadFactoryBuilder().setNameFormat("User Authenticator #%d").setUncaughtExceptionHandler(new DefaultUncaughtExceptionHandler(LOGGER)).build()); // Paper - Cache authenticator threads
+
     // Spigot start
     public void initUUID()
     {
@@ -242,8 +244,8 @@ public class ServerLoginPacketListenerImpl implements TickablePacketListener, Se
                 this.connection.send(new ClientboundHelloPacket("", this.server.getKeyPair().getPublic().getEncoded(), this.nonce));
             } else {
                 // Spigot start
-                new Thread("User Authenticator #" + ServerLoginPacketListenerImpl.UNIQUE_THREAD_ID.incrementAndGet()) {
-
+            // Paper start - Cache authenticator threads
+            authenticatorPool.execute(new Runnable() {
                     @Override
                     public void run() {
                         try {
@@ -254,7 +256,8 @@ public class ServerLoginPacketListenerImpl implements TickablePacketListener, Se
                             server.server.getLogger().log(java.util.logging.Level.WARNING, "Exception verifying " + ServerLoginPacketListenerImpl.this.gameProfile.getName(), ex);
                         }
                     }
-                }.start();
+            });
+            // Paper end
                 // Spigot end
             }
 
@@ -297,7 +300,8 @@ public class ServerLoginPacketListenerImpl implements TickablePacketListener, Se
             throw new IllegalStateException("Protocol error", cryptographyexception);
         }
 
-        Thread thread = new Thread("User Authenticator #" + ServerLoginPacketListenerImpl.UNIQUE_THREAD_ID.incrementAndGet()) {
+        // Paper start - Cache authenticator threads
+        authenticatorPool.execute(new Runnable() {
             public void run() {
                 GameProfile gameprofile = ServerLoginPacketListenerImpl.this.gameProfile;
 
@@ -342,10 +346,8 @@ public class ServerLoginPacketListenerImpl implements TickablePacketListener, Se
 
                 return ServerLoginPacketListenerImpl.this.server.getPreventProxyConnections() && socketaddress instanceof InetSocketAddress ? ((InetSocketAddress) socketaddress).getAddress() : null;
             }
-        };
-
-        thread.setUncaughtExceptionHandler(new DefaultUncaughtExceptionHandler(ServerLoginPacketListenerImpl.LOGGER));
-        thread.start();
+        });
+        // Paper end
     }
 
     // Spigot start