Paper/Spigot-Server-Patches/0171-handle-PacketPlayInKeepAlive-async.patch
MiniDigger | Martin 0fb8bdf0e0
Updated Upstream (Bukkit/CraftBukkit) (#5508)
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
14883d6b SPIGOT-6078: Add SmithItemEvent and expand SmithingInventory API

CraftBukkit Changes:
115244c7 SPIGOT-6078: Add SmithItemEvent and expand SmithingInventory API
2021-04-18 09:02:48 +00:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Thu, 5 Oct 2017 01:54:07 +0100
Subject: [PATCH] handle PacketPlayInKeepAlive async
In 1.12.2, Mojang moved the processing of PacketPlayInKeepAlive 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/PlayerConnection.java b/src/main/java/net/minecraft/server/network/PlayerConnection.java
index 7af07ca8e1fa20361c95841b48dd70cdf46a18b5..685415240d7be66fe968198b33c1865a906e18c9 100644
--- a/src/main/java/net/minecraft/server/network/PlayerConnection.java
+++ b/src/main/java/net/minecraft/server/network/PlayerConnection.java
@@ -2778,14 +2778,18 @@ public class PlayerConnection implements PacketListenerPlayIn {
@Override
public void a(PacketPlayInKeepAlive packetplayinkeepalive) {
- PlayerConnectionUtils.ensureMainThread(packetplayinkeepalive, this, this.player.getWorldServer()); // CraftBukkit
+ //PlayerConnectionUtils.ensureMainThread(packetplayinkeepalive, this, this.player.getWorldServer()); // CraftBukkit // Paper - This shouldn't be on the main thread
if (this.awaitingKeepAlive && packetplayinkeepalive.b() == this.h) {
int i = (int) (SystemUtils.getMonotonicMillis() - this.lastKeepAlive);
this.player.ping = (this.player.ping * 3 + i) / 4;
this.awaitingKeepAlive = false;
} else if (!this.isExemptPlayer()) {
+ // Paper start - This needs to be handled on the main thread for plugins
+ minecraftServer.scheduleOnMain(() -> {
this.disconnect(new ChatMessage("disconnect.timeout"));
+ });
+ // Paper end
}
}