Paper/patches/server/0398-Don-t-move-existing-players-to-world-spawn.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Thu, 9 Apr 2020 21:20:33 -0400
Subject: [PATCH] Don't move existing players to world spawn
This can cause a nasty server lag the spawn chunks are not kept loaded
or they aren't finished loading yet, or if the world spawn radius is
larger than the keep loaded range.
By skipping this, we avoid potential for a large spike on server start.
diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
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index 9a78729da82e0e8625ccdd33e221b019bad91a1c..f555559f88634a1ec962dedd3fc96e044546f496 100644
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--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
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@@ -310,7 +310,7 @@ public class ServerPlayer extends Player {
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this.stats = server.getPlayerList().getStatisticManager(this);
this.advancements = server.getPlayerList().getPlayerAdvancements(this);
this.maxUpStep = 1.0F;
- this.fudgeSpawnLocation(world);
+ //this.c(worldserver); // Paper - don't move to spawn on login, only first join
this.cachedSingleHashSet = new com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<>(this); // Paper
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@@ -529,7 +529,7 @@ public class ServerPlayer extends Player {
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position = Vec3.atCenterOf(((ServerLevel) world).getSharedSpawnPos());
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}
this.level = world;
- this.setPos(position.x(), position.y(), position.z());
+ this.setPosRaw(position.x(), position.y(), position.z()); // Paper - don't register to chunks yet
}
this.gameMode.setLevel((ServerLevel) world);
}
diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
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index b828d6b2ce20a058acbabba5594e743d91df3060..6f3187aae34c24c6a9b22074d487006926afe524 100644
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--- a/src/main/java/net/minecraft/server/players/PlayerList.java
+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
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@@ -210,6 +210,8 @@ public abstract class PlayerList {
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worldserver1 = worldserver;
}
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+ if (nbttagcompound == null) player.fudgeSpawnLocation(worldserver1); // Paper - only move to spawn on first login, otherwise, stay where you are....
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+
player.setLevel(worldserver1);
String s1 = "local";
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