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Paper/patches/server/1035-Add-proper-async-player-disconnections.patch

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Add proper async player disconnections Blocking can cause performance problems
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Wed, 16 Oct 2024 06:41:32 -0700
Subject: [PATCH] Add proper async player disconnections
Blocking can cause performance problems
diff --git a/src/main/java/net/minecraft/network/Connection.java b/src/main/java/net/minecraft/network/Connection.java
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index 90a2c61c42cba7e38f167eccdd7a951a947963c4..fff8d15d44613a075b9793c2a41520212166eb3b 100644
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--- a/src/main/java/net/minecraft/network/Connection.java
+++ b/src/main/java/net/minecraft/network/Connection.java
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@@ -844,6 +844,14 @@ public class Connection extends SimpleChannelInboundHandler<Packet<?>> {
Add proper async player disconnections Blocking can cause performance problems
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}
+ // Paper start - add proper async disconnect
+ public void enableAutoRead() {
+ if (this.channel != null) {
+ this.channel.config().setAutoRead(true);
+ }
+ }
+ // Paper end - add proper async disconnect
+
public void setupCompression(int compressionThreshold, boolean rejectsBadPackets) {
if (compressionThreshold >= 0) {
com.velocitypowered.natives.compression.VelocityCompressor compressor = com.velocitypowered.natives.util.Natives.compress.get().create(io.papermc.paper.configuration.GlobalConfiguration.get().misc.compressionLevel.or(-1)); // Paper - Use Velocity cipher
diff --git a/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
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index fc242acade3ff06c9213428cde103cf078216382..b0bc66dc7248aae691dcab68b925b52a1695e63f 100644
Add proper async player disconnections Blocking can cause performance problems
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--- a/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
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@@ -143,11 +143,7 @@ public abstract class ServerCommonPacketListenerImpl implements ServerCommonPack
Add proper async player disconnections Blocking can cause performance problems
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this.latency = (this.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(ServerCommonPacketListenerImpl.TIMEOUT_DISCONNECTION_MESSAGE, PlayerKickEvent.Cause.TIMEOUT); // Paper - kick event cause
- });
- // Paper end - This needs to be handled on the main thread for plugins
+ this.disconnectAsync(ServerCommonPacketListenerImpl.TIMEOUT_DISCONNECTION_MESSAGE, PlayerKickEvent.Cause.TIMEOUT); // Paper - add proper async disconnect
}
}
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@@ -411,6 +407,31 @@ public abstract class ServerCommonPacketListenerImpl implements ServerCommonPack
Add proper async player disconnections Blocking can cause performance problems
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minecraftserver.scheduleOnMain(networkmanager::handleDisconnection); // Paper
}
+ // Paper start - add proper async disconnect
+ public void disconnectAsync(net.kyori.adventure.text.Component reason, PlayerKickEvent.Cause cause) {
+ this.disconnectAsync(io.papermc.paper.adventure.PaperAdventure.asVanilla(reason), cause);
+ }
+
+ public void disconnectAsync(Component reason, PlayerKickEvent.Cause cause) {
+ this.disconnectAsync(new DisconnectionDetails(reason), cause);
+ }
+
+ public void disconnectAsync(DisconnectionDetails disconnectionInfo, PlayerKickEvent.Cause cause) {
+ if (this.cserver.isPrimaryThread()) {
+ this.disconnect(disconnectionInfo, cause);
+ return;
+ }
+ this.connection.setReadOnly();
+ this.server.scheduleOnMain(() -> {
+ ServerCommonPacketListenerImpl.this.disconnect(disconnectionInfo, cause);
+ if (ServerCommonPacketListenerImpl.this.player.quitReason == null) {
+ // cancelled
+ ServerCommonPacketListenerImpl.this.connection.enableAutoRead();
+ }
+ });
+ }
+ // Paper end - add proper async disconnect
+
protected boolean isSingleplayerOwner() {
return this.server.isSingleplayerOwner(this.playerProfile());
}
diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
Only expose velocity relative tp flags to API (#11532) Since 1.21.2, vanilla split relative teleportation flags into position and delta/velocity flags into separate enum entries. This highlighted a design flaw in the paper api addition for teleport flags, which just simply mirrored internals while also only being able to apply the delta/velocity part of a flag, given the teleport target is always absolute in the API. This patch proposes to simply no longer expose the non-velocity related flags to the API, instead marking the entire Relative enum as being purely velocity related, as non-velocity related flags are not useful to callers. This was done over simply exposing all internal flags, as another vanilla change to the internal enum would result in the same breakage. The newly proposed API *only* promises that the passed flags prevent the loss of velocity in the specific axis/context, which should be independent enough of vanillas specific implementation of this feature.
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index fc64c09f466e6a0fb3eb6aa47f28f90748e81ce6..e3458038d56b7133f991a5198db26398a299bf30 100644
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--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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@@ -769,7 +769,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
Add proper async player disconnections Blocking can cause performance problems
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// PacketUtils.ensureRunningOnSameThread(packet, this, this.player.serverLevel()); // Paper - AsyncTabCompleteEvent; run this async
// CraftBukkit start
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if (!this.tabSpamThrottler.isIncrementAndUnderThreshold() && !this.server.getPlayerList().isOp(this.player.getGameProfile()) && !this.server.isSingleplayerOwner(this.player.getGameProfile())) { // Paper - configurable tab spam limits
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- this.disconnect(Component.translatable("disconnect.spam"), org.bukkit.event.player.PlayerKickEvent.Cause.SPAM); // Paper - Kick event cause
+ this.disconnectAsync(Component.translatable("disconnect.spam"), org.bukkit.event.player.PlayerKickEvent.Cause.SPAM); // Paper - Kick event cause // Paper - add proper async disconnect
return;
}
// CraftBukkit end
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@@ -781,7 +781,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
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// Paper start
final int index;
if (packet.getCommand().length() > 64 && ((index = packet.getCommand().indexOf(' ')) == -1 || index >= 64)) {
- this.disconnect(Component.translatable("disconnect.spam"), org.bukkit.event.player.PlayerKickEvent.Cause.SPAM);
+ this.disconnectAsync(Component.translatable("disconnect.spam"), org.bukkit.event.player.PlayerKickEvent.Cause.SPAM); // Paper - add proper async disconnect
return;
}
// Paper end
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@@ -1171,14 +1171,14 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
Add proper async player disconnections Blocking can cause performance problems
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if (byteTotal > byteAllowed) {
ServerGamePacketListenerImpl.LOGGER.warn("{} tried to send a book too large. Book size: {} - Allowed: {} - Pages: {}", this.player.getScoreboardName(), byteTotal, byteAllowed, pageList.size());
- this.disconnect(Component.literal("Book too large!"), org.bukkit.event.player.PlayerKickEvent.Cause.ILLEGAL_ACTION); // Paper - kick event cause
+ this.disconnectAsync(Component.literal("Book too large!"), org.bukkit.event.player.PlayerKickEvent.Cause.ILLEGAL_ACTION); // Paper - kick event cause // Paper - add proper async disconnect
return;
}
}
// Paper end - Book size limits
// CraftBukkit start
if (this.lastBookTick + 20 > MinecraftServer.currentTick) {
- this.disconnect(Component.literal("Book edited too quickly!"), org.bukkit.event.player.PlayerKickEvent.Cause.ILLEGAL_ACTION); // Paper - kick event cause
+ this.disconnectAsync(Component.literal("Book edited too quickly!"), org.bukkit.event.player.PlayerKickEvent.Cause.ILLEGAL_ACTION); // Paper - kick event cause // Paper - add proper async disconnect
return;
}
this.lastBookTick = MinecraftServer.currentTick;
Only expose velocity relative tp flags to API (#11532) Since 1.21.2, vanilla split relative teleportation flags into position and delta/velocity flags into separate enum entries. This highlighted a design flaw in the paper api addition for teleport flags, which just simply mirrored internals while also only being able to apply the delta/velocity part of a flag, given the teleport target is always absolute in the API. This patch proposes to simply no longer expose the non-velocity related flags to the API, instead marking the entire Relative enum as being purely velocity related, as non-velocity related flags are not useful to callers. This was done over simply exposing all internal flags, as another vanilla change to the internal enum would result in the same breakage. The newly proposed API *only* promises that the passed flags prevent the loss of velocity in the specific axis/context, which should be independent enough of vanillas specific implementation of this feature.
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@@ -2305,7 +2305,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
Add proper async player disconnections Blocking can cause performance problems
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private void tryHandleChat(String s, Runnable runnable, boolean sync) { // CraftBukkit
if (ServerGamePacketListenerImpl.isChatMessageIllegal(s)) {
- this.disconnect((Component) Component.translatable("multiplayer.disconnect.illegal_characters"), org.bukkit.event.player.PlayerKickEvent.Cause.ILLEGAL_CHARACTERS); // Paper
+ this.disconnectAsync((Component) Component.translatable("multiplayer.disconnect.illegal_characters"), org.bukkit.event.player.PlayerKickEvent.Cause.ILLEGAL_CHARACTERS); // Paper // Paper - add proper async disconnect
} else if (this.player.isRemoved() || this.player.getChatVisibility() == ChatVisiblity.HIDDEN) { // CraftBukkit - dead men tell no tales
this.send(new ClientboundSystemChatPacket(Component.translatable("chat.disabled.options").withStyle(ChatFormatting.RED), false));
} else {
Only expose velocity relative tp flags to API (#11532) Since 1.21.2, vanilla split relative teleportation flags into position and delta/velocity flags into separate enum entries. This highlighted a design flaw in the paper api addition for teleport flags, which just simply mirrored internals while also only being able to apply the delta/velocity part of a flag, given the teleport target is always absolute in the API. This patch proposes to simply no longer expose the non-velocity related flags to the API, instead marking the entire Relative enum as being purely velocity related, as non-velocity related flags are not useful to callers. This was done over simply exposing all internal flags, as another vanilla change to the internal enum would result in the same breakage. The newly proposed API *only* promises that the passed flags prevent the loss of velocity in the specific axis/context, which should be independent enough of vanillas specific implementation of this feature.
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@@ -2328,7 +2328,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
Add proper async player disconnections Blocking can cause performance problems
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if (optional.isEmpty()) {
ServerGamePacketListenerImpl.LOGGER.warn("Failed to validate message acknowledgements from {}", this.player.getName().getString());
- this.disconnect(ServerGamePacketListenerImpl.CHAT_VALIDATION_FAILED, org.bukkit.event.player.PlayerKickEvent.Cause.CHAT_VALIDATION_FAILED); // Paper - kick event causes
+ this.disconnectAsync(ServerGamePacketListenerImpl.CHAT_VALIDATION_FAILED, org.bukkit.event.player.PlayerKickEvent.Cause.CHAT_VALIDATION_FAILED); // Paper - kick event causes // Paper - add proper async disconnect
}
return optional;
Only expose velocity relative tp flags to API (#11532) Since 1.21.2, vanilla split relative teleportation flags into position and delta/velocity flags into separate enum entries. This highlighted a design flaw in the paper api addition for teleport flags, which just simply mirrored internals while also only being able to apply the delta/velocity part of a flag, given the teleport target is always absolute in the API. This patch proposes to simply no longer expose the non-velocity related flags to the API, instead marking the entire Relative enum as being purely velocity related, as non-velocity related flags are not useful to callers. This was done over simply exposing all internal flags, as another vanilla change to the internal enum would result in the same breakage. The newly proposed API *only* promises that the passed flags prevent the loss of velocity in the specific axis/context, which should be independent enough of vanillas specific implementation of this feature.
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@@ -2499,7 +2499,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
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// this.chatSpamThrottler.increment();
Compiler issues v2
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if (!this.chatSpamThrottler.isIncrementAndUnderThreshold() && !this.server.getPlayerList().isOp(this.player.getGameProfile()) && !this.server.isSingleplayerOwner(this.player.getGameProfile())) {
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// CraftBukkit end
- this.disconnect((Component) Component.translatable("disconnect.spam"), org.bukkit.event.player.PlayerKickEvent.Cause.SPAM); // Paper - kick event cause
+ this.disconnectAsync((Component) Component.translatable("disconnect.spam"), org.bukkit.event.player.PlayerKickEvent.Cause.SPAM); // Paper - kick event cause // Paper - add proper async disconnect
}
}
Only expose velocity relative tp flags to API (#11532) Since 1.21.2, vanilla split relative teleportation flags into position and delta/velocity flags into separate enum entries. This highlighted a design flaw in the paper api addition for teleport flags, which just simply mirrored internals while also only being able to apply the delta/velocity part of a flag, given the teleport target is always absolute in the API. This patch proposes to simply no longer expose the non-velocity related flags to the API, instead marking the entire Relative enum as being purely velocity related, as non-velocity related flags are not useful to callers. This was done over simply exposing all internal flags, as another vanilla change to the internal enum would result in the same breakage. The newly proposed API *only* promises that the passed flags prevent the loss of velocity in the specific axis/context, which should be independent enough of vanillas specific implementation of this feature.
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@@ -2511,7 +2511,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
Add proper async player disconnections Blocking can cause performance problems
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synchronized (this.lastSeenMessages) {
if (!this.lastSeenMessages.applyOffset(packet.offset())) {
ServerGamePacketListenerImpl.LOGGER.warn("Failed to validate message acknowledgements from {}", this.player.getName().getString());
- this.disconnect(ServerGamePacketListenerImpl.CHAT_VALIDATION_FAILED, org.bukkit.event.player.PlayerKickEvent.Cause.CHAT_VALIDATION_FAILED); // Paper - kick event causes
+ this.disconnectAsync(ServerGamePacketListenerImpl.CHAT_VALIDATION_FAILED, org.bukkit.event.player.PlayerKickEvent.Cause.CHAT_VALIDATION_FAILED); // Paper - kick event causes // Paper - add proper async disconnect
}
}
Only expose velocity relative tp flags to API (#11532) Since 1.21.2, vanilla split relative teleportation flags into position and delta/velocity flags into separate enum entries. This highlighted a design flaw in the paper api addition for teleport flags, which just simply mirrored internals while also only being able to apply the delta/velocity part of a flag, given the teleport target is always absolute in the API. This patch proposes to simply no longer expose the non-velocity related flags to the API, instead marking the entire Relative enum as being purely velocity related, as non-velocity related flags are not useful to callers. This was done over simply exposing all internal flags, as another vanilla change to the internal enum would result in the same breakage. The newly proposed API *only* promises that the passed flags prevent the loss of velocity in the specific axis/context, which should be independent enough of vanillas specific implementation of this feature.
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@@ -2659,7 +2659,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
Add proper async player disconnections Blocking can cause performance problems
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}
if (i > 4096) {
- this.disconnect((Component) Component.translatable("multiplayer.disconnect.too_many_pending_chats"), org.bukkit.event.player.PlayerKickEvent.Cause.TOO_MANY_PENDING_CHATS); // Paper - kick event cause
+ this.disconnectAsync((Component) Component.translatable("multiplayer.disconnect.too_many_pending_chats"), org.bukkit.event.player.PlayerKickEvent.Cause.TOO_MANY_PENDING_CHATS); // Paper - kick event cause // Paper - add proper async disconnect
}
}
Only expose velocity relative tp flags to API (#11532) Since 1.21.2, vanilla split relative teleportation flags into position and delta/velocity flags into separate enum entries. This highlighted a design flaw in the paper api addition for teleport flags, which just simply mirrored internals while also only being able to apply the delta/velocity part of a flag, given the teleport target is always absolute in the API. This patch proposes to simply no longer expose the non-velocity related flags to the API, instead marking the entire Relative enum as being purely velocity related, as non-velocity related flags are not useful to callers. This was done over simply exposing all internal flags, as another vanilla change to the internal enum would result in the same breakage. The newly proposed API *only* promises that the passed flags prevent the loss of velocity in the specific axis/context, which should be independent enough of vanillas specific implementation of this feature.
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@@ -3268,7 +3268,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
Add proper async player disconnections Blocking can cause performance problems
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// Paper start - auto recipe limit
if (!org.bukkit.Bukkit.isPrimaryThread()) {
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if (!this.recipeSpamPackets.isIncrementAndUnderThreshold()) {
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- this.disconnect(net.minecraft.network.chat.Component.translatable("disconnect.spam"), org.bukkit.event.player.PlayerKickEvent.Cause.SPAM); // Paper - kick event cause
+ this.disconnectAsync(net.minecraft.network.chat.Component.translatable("disconnect.spam"), org.bukkit.event.player.PlayerKickEvent.Cause.SPAM); // Paper - kick event cause // Paper - add proper async disconnect
return;
}
}
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