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Paper/patches/server/0396-Load-Chunks-for-Login-Asynchronously.patch
Spottedleaf 41647af74c Do not use worldgen executor for api profile completions 
We cannot put blocking network I/O onto the worldgen threads,
this will crash the server if it stalls
2022-07-03 14:55:56 -07:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 19 Apr 2020 04:28:29 -0400
Subject: [PATCH] Load Chunks for Login Asynchronously
diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
index 55aae33d3b296ff8e02b1c36c55678979d48ac3d..c1d9c365edc8b6d2c5b94926faaa00180ca3885b 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
@@ -180,6 +180,7 @@ public class ServerPlayer extends Player {
private static final int NEUTRAL_MOB_DEATH_NOTIFICATION_RADII_XZ = 32;
private static final int NEUTRAL_MOB_DEATH_NOTIFICATION_RADII_Y = 10;
public ServerGamePacketListenerImpl connection;
+ public net.minecraft.network.Connection networkManager; // Paper
public final MinecraftServer server;
public final ServerPlayerGameMode gameMode;
private final PlayerAdvancements advancements;
@@ -253,6 +254,7 @@ public class ServerPlayer extends Player {
public boolean joining = true;
public boolean sentListPacket = false;
public boolean supressTrackerForLogin = false; // Paper
+ public boolean didPlayerJoinEvent = false; // Paper
public Integer clientViewDistance;
public String kickLeaveMessage = null; // SPIGOT-3034: Forward leave message to PlayerQuitEvent
// CraftBukkit end
diff --git a/src/main/java/net/minecraft/server/level/TicketType.java b/src/main/java/net/minecraft/server/level/TicketType.java
index be677d437d17b74c6188ce1bd5fc6fdc228fd92f..78fbb4c3e52e900956ae0811aaf934c81ee5ea48 100644
--- a/src/main/java/net/minecraft/server/level/TicketType.java
+++ b/src/main/java/net/minecraft/server/level/TicketType.java
@@ -23,6 +23,7 @@ public class TicketType<T> {
public static final TicketType<ChunkPos> FORCED = TicketType.create("forced", Comparator.comparingLong(ChunkPos::toLong));
public static final TicketType<ChunkPos> LIGHT = TicketType.create("light", Comparator.comparingLong(ChunkPos::toLong));
public static final TicketType<BlockPos> PORTAL = TicketType.create("portal", Vec3i::compareTo, 300);
+ public static final TicketType<Long> LOGIN = create("login", Long::compareTo, 100); // Paper
public static final TicketType<Integer> POST_TELEPORT = TicketType.create("post_teleport", Integer::compareTo, 5);
public static final TicketType<ChunkPos> UNKNOWN = TicketType.create("unknown", Comparator.comparingLong(ChunkPos::toLong), 1);
public static final TicketType<Unit> PLUGIN = TicketType.create("plugin", (a, b) -> 0); // CraftBukkit
diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index fcbd099d77b4dec7a91da2b7fb219c300482a83b..ec82608da0d39a1b60d1595cee9aeae3efef9fac 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -238,6 +238,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
private static final int NO_BLOCK_UPDATES_TO_ACK = -1;
public final Connection connection;
private final MinecraftServer server;
+ public Runnable playerJoinReady; // Paper
public ServerPlayer player;
private int tickCount;
private int ackBlockChangesUpTo = -1;
@@ -315,6 +316,15 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
// CraftBukkit end
public void tick() {
+ // Paper start - login async
+ Runnable playerJoinReady = this.playerJoinReady;
+ if (playerJoinReady != null) {
+ this.playerJoinReady = null;
+ playerJoinReady.run();
+ }
+ // Don't tick if not valid (dead), otherwise we load chunks below
+ if (this.player.valid) {
+ // Paper end
if (this.ackBlockChangesUpTo > -1) {
this.send(new ClientboundBlockChangedAckPacket(this.ackBlockChangesUpTo));
this.ackBlockChangesUpTo = -1;
@@ -361,7 +371,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
this.lastVehicle = null;
this.clientVehicleIsFloating = false;
this.aboveGroundVehicleTickCount = 0;
- }
+ }} // Paper - end if (valid)
this.server.getProfiler().push("keepAlive");
// Paper Start - give clients a longer time to respond to pings as per pre 1.12.2 timings
diff --git a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
index 8b5eddce4845619603ccfeec158d97cb86568e0d..ec2825b6d276b6200c4bec5580d012f1eaed722e 100644
--- a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
@@ -93,7 +93,7 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener
}
// Paper end
} else if (this.state == ServerLoginPacketListenerImpl.State.DELAY_ACCEPT) {
- ServerPlayer entityplayer = this.server.getPlayerList().getPlayer(this.gameProfile.getId());
+ ServerPlayer entityplayer = this.server.getPlayerList().getActivePlayer(this.gameProfile.getId()); // Paper
if (entityplayer == null) {
this.state = ServerLoginPacketListenerImpl.State.READY_TO_ACCEPT;
@@ -192,7 +192,7 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener
}
this.connection.send(new ClientboundGameProfilePacket(this.gameProfile));
- ServerPlayer entityplayer = this.server.getPlayerList().getPlayer(this.gameProfile.getId());
+ ServerPlayer entityplayer = this.server.getPlayerList().getActivePlayer(this.gameProfile.getId()); // Paper
try {
ServerPlayer entityplayer1 = this.server.getPlayerList().getPlayerForLogin(this.gameProfile, s); // CraftBukkit - add player reference
diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
index ac0bae0f7ce766a67cf2dc2c5c35f244e5a08837..4b9e030016bef762c01ace5181ade7d1480b8702 100644
--- a/src/main/java/net/minecraft/server/players/PlayerList.java
+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
@@ -138,6 +138,7 @@ public abstract class PlayerList {
private final IpBanList ipBans;
private final ServerOpList ops;
private final UserWhiteList whitelist;
+ private final Map<UUID, ServerPlayer> pendingPlayers = Maps.newHashMap(); // Paper
// CraftBukkit start
// private final Map<UUID, ServerStatisticManager> stats;
// private final Map<UUID, AdvancementDataPlayer> advancements;
@@ -177,6 +178,11 @@ public abstract class PlayerList {
}
public void placeNewPlayer(Connection connection, ServerPlayer player) {
+ ServerPlayer prev = pendingPlayers.put(player.getUUID(), player);// Paper
+ if (prev != null) {
+ disconnectPendingPlayer(prev);
+ }
+ player.networkManager = connection; // Paper
player.loginTime = System.currentTimeMillis(); // Paper
GameProfile gameprofile = player.getGameProfile();
GameProfileCache usercache = this.server.getProfileCache();
@@ -190,7 +196,7 @@ public abstract class PlayerList {
if (nbttagcompound != null && nbttagcompound.contains("bukkit")) {
CompoundTag bukkit = nbttagcompound.getCompound("bukkit");
s = bukkit.contains("lastKnownName", 8) ? bukkit.getString("lastKnownName") : s;
- }
+ }String lastKnownName = s; // Paper
// CraftBukkit end
if (nbttagcompound != null) {
@@ -217,11 +223,15 @@ public abstract class PlayerList {
if (nbttagcompound == null) player.fudgeSpawnLocation(worldserver1); // Paper - only move to spawn on first login, otherwise, stay where you are....
player.setLevel(worldserver1);
- String s1 = "local";
+ // Paper start - make s1 final
+ final String s1;
if (connection.getRemoteAddress() != null) {
s1 = connection.getRemoteAddress().toString();
+ } else {
+ s1 = "local";
}
+ // Paper end
// Spigot start - spawn location event
Player spawnPlayer = player.getBukkitEntity();
@@ -263,6 +273,52 @@ public abstract class PlayerList {
player.getRecipeBook().sendInitialRecipeBook(player);
this.updateEntireScoreboard(worldserver1.getScoreboard(), player);
this.server.invalidateStatus();
+ // Paper start - async load spawn in chunk
+ ServerLevel finalWorldserver = worldserver1;
+ int chunkX = loc.getBlockX() >> 4;
+ int chunkZ = loc.getBlockZ() >> 4;
+ final net.minecraft.world.level.ChunkPos pos = new net.minecraft.world.level.ChunkPos(chunkX, chunkZ);
+ net.minecraft.server.level.ChunkMap playerChunkMap = worldserver1.getChunkSource().chunkMap;
+ net.minecraft.server.level.DistanceManager distanceManager = playerChunkMap.distanceManager;
+ distanceManager.addTicket(net.minecraft.server.level.TicketType.LOGIN, pos, 31, pos.toLong());
+ worldserver1.getChunkSource().runDistanceManagerUpdates();
+ worldserver1.getChunkSource().getChunkAtAsynchronously(chunkX, chunkZ, true, true).thenApply(chunk -> {
+ net.minecraft.server.level.ChunkHolder updatingChunk = playerChunkMap.getUpdatingChunkIfPresent(pos.toLong());
+ if (updatingChunk != null) {
+ return updatingChunk.getEntityTickingChunkFuture();
+ } else {
+ return java.util.concurrent.CompletableFuture.completedFuture(chunk);
+ }
+ }).thenAccept(chunk -> {
+ playerconnection.playerJoinReady = () -> {
+ postChunkLoadJoin(
+ player, finalWorldserver, connection, playerconnection,
+ nbttagcompound, s1, lastKnownName
+ );
+ };
+ });
+ }
+
+ public ServerPlayer getActivePlayer(UUID uuid) {
+ ServerPlayer player = this.playersByUUID.get(uuid);
+ return player != null ? player : pendingPlayers.get(uuid);
+ }
+
+ void disconnectPendingPlayer(ServerPlayer entityplayer) {
+ Component msg = Component.translatable("multiplayer.disconnect.duplicate_login");
+ entityplayer.networkManager.send(new net.minecraft.network.protocol.game.ClientboundDisconnectPacket(msg), (future) -> {
+ entityplayer.networkManager.disconnect(msg);
+ entityplayer.networkManager = null;
+ });
+ }
+
+ private void postChunkLoadJoin(ServerPlayer player, ServerLevel worldserver1, Connection networkmanager, ServerGamePacketListenerImpl playerconnection, CompoundTag nbttagcompound, String s1, String s) {
+ pendingPlayers.remove(player.getUUID(), player);
+ if (!networkmanager.isConnected()) {
+ return;
+ }
+ player.didPlayerJoinEvent = true;
+ // Paper end
MutableComponent ichatmutablecomponent;
if (player.getGameProfile().getName().equalsIgnoreCase(s)) {
@@ -504,6 +560,7 @@ public abstract class PlayerList {
protected void save(ServerPlayer player) {
if (!player.getBukkitEntity().isPersistent()) return; // CraftBukkit
+ if (!player.didPlayerJoinEvent) return; // Paper - If we never fired PJE, we disconnected during login. Data has not changed, and additionally, our saved vehicle is not loaded! If we save now, we will lose our vehicle (CraftBukkit bug)
this.playerIo.save(player);
ServerStatsCounter serverstatisticmanager = (ServerStatsCounter) player.getStats(); // CraftBukkit
@@ -531,7 +588,7 @@ public abstract class PlayerList {
}
PlayerQuitEvent playerQuitEvent = new PlayerQuitEvent(entityplayer.getBukkitEntity(), net.kyori.adventure.text.Component.translatable("multiplayer.player.left", net.kyori.adventure.text.format.NamedTextColor.YELLOW, io.papermc.paper.configuration.GlobalConfiguration.get().messages.useDisplayNameInQuitMessage ? entityplayer.getBukkitEntity().displayName() : net.kyori.adventure.text.Component.text(entityplayer.getScoreboardName())));
- this.cserver.getPluginManager().callEvent(playerQuitEvent);
+ if (entityplayer.didPlayerJoinEvent) this.cserver.getPluginManager().callEvent(playerQuitEvent); // Paper - if we disconnected before join ever fired, don't fire quit
entityplayer.getBukkitEntity().disconnect(playerQuitEvent.getQuitMessage());
if (server.isSameThread()) entityplayer.doTick(); // SPIGOT-924 // Paper - don't tick during emergency shutdowns (Watchdog)
@@ -576,6 +633,13 @@ public abstract class PlayerList {
// this.advancements.remove(uuid);
// CraftBukkit end
}
+ // Paper start
+ entityplayer1 = pendingPlayers.get(uuid);
+ if (entityplayer1 == entityplayer) {
+ pendingPlayers.remove(uuid);
+ }
+ entityplayer.networkManager = null;
+ // Paper end
// CraftBukkit start
// this.broadcastAll(new PacketPlayOutPlayerInfo(PacketPlayOutPlayerInfo.EnumPlayerInfoAction.REMOVE_PLAYER, new EntityPlayer[]{entityplayer}));
@@ -593,7 +657,7 @@ public abstract class PlayerList {
this.cserver.getScoreboardManager().removePlayer(entityplayer.getBukkitEntity());
// CraftBukkit end
- return playerQuitEvent.quitMessage(); // Paper - Adventure
+ return entityplayer.didPlayerJoinEvent ? playerQuitEvent.quitMessage() : null; // CraftBukkit // Paper - Adventure // Paper - don't print quit if we never printed join
}
// CraftBukkit start - Whole method, SocketAddress to LoginListener, added hostname to signature, return EntityPlayer
@@ -612,6 +676,13 @@ public abstract class PlayerList {
list.add(entityplayer);
}
}
+ // Paper start - check pending players too
+ entityplayer = pendingPlayers.get(uuid);
+ if (entityplayer != null) {
+ this.pendingPlayers.remove(uuid);
+ disconnectPendingPlayer(entityplayer);
+ }
+ // Paper end
Iterator iterator = list.iterator();
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