Paper/patches/server/0456-Fix-SPIGOT-5989.patch
Spottedleaf 01a13871de
Rewrite chunk system (#8177)
Patch documentation to come

Issues with the old system that are fixed now:
- World generation does not scale with cpu cores effectively.
- Relies on the main thread for scheduling and maintaining chunk state, dropping chunk load/generate rates at lower tps.
- Unreliable prioritisation of chunk gen/load calls that block the main thread.
- Shutdown logic is utterly unreliable, as it has to wait for all chunks to unload - is it guaranteed that the chunk system is in a state on shutdown that it can reliably do this? Watchdog shutdown also typically failed due to thread checks, which is now resolved.
- Saving of data is not unified (i.e can save chunk data without saving entity data, poses problems for desync if shutdown is really abnormal.
- Entities are not loaded with chunks. This caused quite a bit of headache for Chunk#getEntities API, but now the new chunk system loads entities with chunks so that they are ready whenever the chunk loads in. Effectively brings the behavior back to 1.16 era, but still storing entities in their own separate regionfiles.

The above list is not complete. The patch documentation will complete it.

New chunk system hard relies on starlight and dataconverter, and most importantly the new concurrent utilities in ConcurrentUtil.

Some of the old async chunk i/o interface (i.e the old file io thread reroutes _some_ calls to the new file io thread) is kept for plugin compat reasons. It will be removed in the next major version of minecraft.

The old legacy chunk system patches have been moved to the removed folder in case we need them again.
2022-09-26 01:02:51 -07:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: JRoy <joshroy126@gmail.com>
Date: Wed, 15 Jul 2020 21:42:52 -0400
Subject: [PATCH] Fix SPIGOT-5989
Before this fix, if a player was respawning to a respawn anchor and
the respawn location was modified away from the anchor with the
PlayerRespawnEvent, the anchor would still lose some charge.
This fixes that by checking if the modified spawn location is
still at a respawn anchor.
diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
index 354719476074acc75b35f8e4a06f0363bd13a3f3..db03f510195981e9f860ce2fdc59d0a70283dc14 100644
--- a/src/main/java/net/minecraft/server/players/PlayerList.java
+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
@@ -842,6 +842,7 @@ public abstract class PlayerList {
// Paper start
boolean isBedSpawn = false;
boolean isRespawn = false;
+ boolean isLocAltered = false; // Paper - Fix SPIGOT-5989
// Paper end
// CraftBukkit start - fire PlayerRespawnEvent
@@ -852,7 +853,7 @@ public abstract class PlayerList {
Optional optional;
if (blockposition != null) {
- optional = net.minecraft.world.entity.player.Player.findRespawnPositionAndUseSpawnBlock(worldserver1, blockposition, f, flag1, flag);
+ optional = net.minecraft.world.entity.player.Player.findRespawnPositionAndUseSpawnBlock(worldserver1, blockposition, f, flag1, true); // Paper - Fix SPIGOT-5989
} else {
optional = Optional.empty();
}
@@ -896,7 +897,12 @@ public abstract class PlayerList {
}
// Spigot End
- location = respawnEvent.getRespawnLocation();
+ // Paper start - Fix SPIGOT-5989
+ if (!location.equals(respawnEvent.getRespawnLocation()) ) {
+ location = respawnEvent.getRespawnLocation();
+ isLocAltered = true;
+ }
+ // Paper end
if (!flag) entityplayer.reset(); // SPIGOT-4785
isRespawn = true; // Paper
} else {
@@ -934,8 +940,12 @@ public abstract class PlayerList {
}
// entityplayer1.initInventoryMenu();
entityplayer1.setHealth(entityplayer1.getHealth());
- if (flag2) {
- entityplayer1.connection.send(new ClientboundSoundPacket(SoundEvents.RESPAWN_ANCHOR_DEPLETE, SoundSource.BLOCKS, (double) blockposition.getX(), (double) blockposition.getY(), (double) blockposition.getZ(), 1.0F, 1.0F, worldserver1.getRandom().nextLong()));
+ // Paper start - Fix SPIGOT-5989
+ if (flag2 && !isLocAltered) {
+ BlockState data = worldserver1.getBlockState(blockposition);
+ worldserver1.setBlock(blockposition, data.setValue(net.minecraft.world.level.block.RespawnAnchorBlock.CHARGE, data.getValue(net.minecraft.world.level.block.RespawnAnchorBlock.CHARGE) - 1), 3);
+ entityplayer1.connection.send(new ClientboundSoundPacket(SoundEvents.RESPAWN_ANCHOR_DEPLETE, SoundSource.BLOCKS, (double) location.getX(), (double) location.getY(), (double) location.getZ(), 1.0F, 1.0F, worldserver1.getRandom().nextLong()));
+ // Paper end
}
// Added from changeDimension
this.sendAllPlayerInfo(entityplayer); // Update health, etc...