1 files changed, 40 insertions, 0 deletions
diff --git a/patches/server/0159-handle-ServerboundKeepAlivePacket-async.patch b/patches/server/0159-handle-ServerboundKeepAlivePacket-async.patch
new file mode 100644
index 0000000000..bb33ae2596
--- /dev/null
+++ b/patches/server/0159-handle-ServerboundKeepAlivePacket-async.patch
@@ -0,0 +1,40 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Shane Freeder <[email protected]>
+Date: Thu, 5 Oct 2017 01:54:07 +0100
+Subject: [PATCH] handle ServerboundKeepAlivePacket async
+
+In 1.12.2, Mojang moved the processing of ServerboundKeepAlivePacket off the main
+thread, while entirely correct for the server, this causes issues with
+plugins which are expecting the PlayerQuitEvent on the main thread.
+
+In order to counteract some bad behavior, we will post handling of the
+disconnection to the main thread, but leave the actual processing of the packet
+off the main thread.
+
+also adding some additional logging in order to help work out what is causing
+random disconnections for clients.
+
+diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+index 32c4383cfb4cab6329d7046c48daf3050fa027c6..c4f1ded84ec1ed152faeb835a3f50b7e31356655 100644
+--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
++++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+@@ -3242,14 +3242,18 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
+ 
+     @Override
+     public void handleKeepAlive(ServerboundKeepAlivePacket packet) {
+-        PacketUtils.ensureRunningOnSameThread(packet, this, this.player.getLevel()); // CraftBukkit
++        //PacketUtils.ensureRunningOnSameThread(packet, this, this.player.getLevel()); // CraftBukkit // Paper - This shouldn't be on the main thread
+         if (this.keepAlivePending && packet.getId() == this.keepAliveChallenge) {
+             int i = (int) (Util.getMillis() - this.keepAliveTime);
+ 
+             this.player.latency = (this.player.latency * 3 + i) / 4;
+             this.keepAlivePending = false;
+         } else if (!this.isSingleplayerOwner()) {
++            // Paper start - This needs to be handled on the main thread for plugins
++            server.submit(() -> {
+             this.disconnect(Component.translatable("disconnect.timeout"));
++            });
++            // Paper end
+         }
+ 
+     }