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aa52bf9e33
Mojang made some changes to priorities in 1.17 and it seems that these changes conflict with the changes made in this patch, which in some cases appears to cause excessive rescheduling of tasks. This, however, is not confirmed as such but seems to be the behavior that we're seeing to cause this issue, if mojang has adopted the changes we suggested, then a good chunk of this patch may be unneeded, but, this needs a much better look than I'm currently able to do
59 lines
2.9 KiB
Diff
59 lines
2.9 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Shane Freeder <theboyetronic@gmail.com>
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Date: Wed, 19 Aug 2020 05:05:54 +0100
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Subject: [PATCH] Buffer joins to world
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This patch buffers the number of logins which will attempt to join
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the world per tick, this attempts to reduce the impact that join floods
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has on the server
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diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
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index e7d54a510303653c5f3c7374e4e83101321840c6..a8585c1a7f7e92a7c91b9e4bba568df5888baf14 100644
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--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
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+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
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@@ -475,4 +475,9 @@ public class PaperConfig {
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maxPlayerAutoSavePerTick = (playerAutoSaveRate == -1 || playerAutoSaveRate > 100) ? 10 : 20;
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}
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}
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+
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+ public static int maxJoinsPerTick;
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+ private static void maxJoinsPerTick() {
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+ maxJoinsPerTick = getInt("settings.max-joins-per-tick", 3);
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+ }
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}
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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 3faf9bc694016f3f46576a549814ff8e6070598a..7f6405ac44fef423dc8b21f3dbeaae26a1005077 100644
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--- a/src/main/java/net/minecraft/network/Connection.java
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+++ b/src/main/java/net/minecraft/network/Connection.java
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@@ -37,6 +37,7 @@ import net.minecraft.network.protocol.Packet;
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import net.minecraft.network.protocol.PacketFlow;
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import net.minecraft.network.protocol.game.ClientboundDisconnectPacket;
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import net.minecraft.network.protocol.login.ClientboundLoginDisconnectPacket;
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+import net.minecraft.server.MinecraftServer;
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import net.minecraft.server.RunningOnDifferentThreadException;
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import net.minecraft.server.network.ServerGamePacketListenerImpl;
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import net.minecraft.server.network.ServerLoginPacketListenerImpl;
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@@ -373,10 +374,22 @@ public class Connection extends SimpleChannelInboundHandler<Packet<?>> {
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}
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// Paper end
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+ private static final int MAX_PER_TICK = com.destroystokyo.paper.PaperConfig.maxJoinsPerTick; // Paper
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+ private static int joinAttemptsThisTick; // Paper
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+ private static int currTick; // Paper
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public void tick() {
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this.flushQueue();
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+ // Paper start
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+ if (currTick != MinecraftServer.currentTick) {
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+ currTick = MinecraftServer.currentTick;
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+ joinAttemptsThisTick = 0;
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+ }
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+ // Paper end
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if (this.packetListener instanceof ServerLoginPacketListenerImpl) {
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+ if ( ((ServerLoginPacketListenerImpl) this.packetListener).state != ServerLoginPacketListenerImpl.State.READY_TO_ACCEPT // Paper
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+ || (joinAttemptsThisTick++ < MAX_PER_TICK)) { // Paper - limit the number of joins which can be processed each tick
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((ServerLoginPacketListenerImpl) this.packetListener).tick();
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+ } // Paper
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}
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if (this.packetListener instanceof ServerGamePacketListenerImpl) {
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