Remove MOST Synchronization from Chunk Map

This will provide quite a major performance boost by avoiding
synchronizing on EVERY chunk lookup.

Synchronize, even without contention, incurs processor cache flushes.

Considering this is the 2nd hottest method in the code base, lets
avoid doing that...

Additionally, chunk conversion operations were occuring while
under synchronization which lead to deadlocks.

Now the conversion will occur outside of the lock, and fix
that issue, resolving #1586

Note, that the chunk map is still thread safe for get operations!

The chunk map was never intended to be modified async with our
changes, as we post to main to modify the map, however
we do still synchronize for write operations (put, remove)

We also synchronize for async get operations, ensuring that
async gets are safe.

We do not need to synchronize main thread gets as the processor
cache will be insync since the map is only updated on the main thread.

However, if someone does try to delete or put concurrently, we
will force their operation back to the main thread.
This commit is contained in:
Aikar 2018-10-18 22:41:23 -04:00
parent fa72a71601
commit 0d1ca37436
No known key found for this signature in database
GPG Key ID: 401ADFC9891FAAFE
4 changed files with 150 additions and 94 deletions

View File

@ -1,4 +1,4 @@
From bbb24713a0d39852c5c6fd794be200e2324afb98 Mon Sep 17 00:00:00 2001
From 7ac07ac07ac07ac07ac07ac07ac07ac07ac07ac0 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sat, 21 Jul 2018 16:55:04 -0400
Subject: [PATCH] Async Chunk Loading and Generation
@ -43,7 +43,7 @@ reading or writing to the chunk will be safe, so plugins still
should not be touching chunks asynchronously!
diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
index b703e0848..77d35ac99 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
@@ -385,4 +385,57 @@ public class PaperConfig {
@ -106,7 +106,7 @@ index b703e0848..77d35ac99 100644
}
diff --git a/src/main/java/com/destroystokyo/paper/util/PriorityQueuedExecutor.java b/src/main/java/com/destroystokyo/paper/util/PriorityQueuedExecutor.java
new file mode 100644
index 000000000..5c77b6e8e
index 7ac07ac07ac0..7ac07ac07ac0
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/util/PriorityQueuedExecutor.java
@@ -0,0 +1,281 @@
@ -392,7 +392,7 @@ index 000000000..5c77b6e8e
+
+}
diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
index edfcb107b..cb9988870 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/Chunk.java
+++ b/src/main/java/net/minecraft/server/Chunk.java
@@ -184,6 +184,7 @@ public class Chunk implements IChunkAccess {
@ -403,12 +403,122 @@ index edfcb107b..cb9988870 100644
}
Iterator iterator = protochunk.s().iterator();
diff --git a/src/main/java/net/minecraft/server/ChunkMap.java b/src/main/java/net/minecraft/server/ChunkMap.java
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/ChunkMap.java
@@ -14,9 +14,17 @@ public class ChunkMap extends Long2ObjectOpenHashMap<Chunk> {
}
public Chunk a(long i, Chunk chunk) {
+ org.spigotmc.AsyncCatcher.catchOp("Async Chunk put"); // Paper
chunk.world.timings.syncChunkLoadPostTimer.startTiming(); // Paper
lastChunkByPos = chunk; // Paper
- Chunk chunk1 = (Chunk) super.put(i, chunk);
+ // Paper start
+ Chunk chunk1;
+ synchronized (this) {
+ // synchronize so any async gets are safe
+ chunk1 = (Chunk) super.put(i, chunk);
+ }
+ if (chunk1 == null) { // Paper - we should never be overwriting chunks
+ // Paper end
ChunkCoordIntPair chunkcoordintpair = new ChunkCoordIntPair(i);
for (int j = chunkcoordintpair.x - 1; j <= chunkcoordintpair.x + 1; ++j) {
@@ -47,7 +55,11 @@ public class ChunkMap extends Long2ObjectOpenHashMap<Chunk> {
chunk.setNeighborLoaded(x, z);
}
}
+ // Paper start
+ } } else {
+ a.error("Overwrote existing chunk! (" + chunk.world.getWorld().getName() + ":" + chunk.locX+"," + chunk.locZ + ")", new IllegalStateException());
}
+ // Paper end
// Paper start - if this is a spare chunk (not part of any players view distance), go ahead and queue it for unload.
if (!((WorldServer)chunk.world).getPlayerChunkMap().isChunkInUse(chunk.locX, chunk.locZ)) {
if (chunk.world.paperConfig.delayChunkUnloadsBy > 0) {
@@ -64,11 +76,19 @@ public class ChunkMap extends Long2ObjectOpenHashMap<Chunk> {
}
public Chunk a(Long olong, Chunk chunk) {
- return this.a(olong.longValue(), chunk);
+ return MCUtil.ensureMain("Chunk Put", () -> this.a(olong.longValue(), chunk)); // Paper
}
public Chunk a(long i) {
- Chunk chunk = (Chunk) super.remove(i);
+ // Paper start
+ org.spigotmc.AsyncCatcher.catchOp("Async Chunk remove");
+ Chunk chunk;
+ synchronized (this) {
+ // synchronize so any async gets are safe
+ chunk = super.remove(i);
+ }
+ if (chunk != null) { // Paper - don't decrement if we didn't remove anything
+ // Paper end
ChunkCoordIntPair chunkcoordintpair = new ChunkCoordIntPair(i);
for (int j = chunkcoordintpair.x - 1; j <= chunkcoordintpair.x + 1; ++j) {
@@ -84,6 +104,7 @@ public class ChunkMap extends Long2ObjectOpenHashMap<Chunk> {
}
// Paper start
+ } // close if (chunk != null)
if (lastChunkByPos != null && i == lastChunkByPos.chunkKey) {
lastChunkByPos = null;
}
@@ -93,15 +114,22 @@ public class ChunkMap extends Long2ObjectOpenHashMap<Chunk> {
@Override
public Chunk get(long l) {
- if (lastChunkByPos != null && l == lastChunkByPos.chunkKey) {
- return lastChunkByPos;
+ if (MCUtil.isMainThread()) {
+ if (lastChunkByPos != null && l == lastChunkByPos.chunkKey) {
+ return lastChunkByPos;
+ }
+ final Chunk chunk = super.get(l);
+ return chunk != null ? (lastChunkByPos = chunk) : null;
+ } else {
+ synchronized (this) {
+ return super.get(l);
+ }
}
- return lastChunkByPos = super.get(l);
}
// Paper end
public Chunk a(Object object) {
- return this.a(((Long) object).longValue());
+ return MCUtil.ensureMain("Chunk Remove", () -> this.a(((Long) object).longValue())); // Paper
}
public void putAll(Map<? extends Long, ? extends Chunk> map) {
@@ -114,11 +142,11 @@ public class ChunkMap extends Long2ObjectOpenHashMap<Chunk> {
// CraftBukkit start - decompile errors
public Chunk remove(long i) {
- return this.a(i);
+ return MCUtil.ensureMain("Chunk Remove", () -> this.a(i)); // Paper
}
public Chunk put(long i, Chunk object) {
- return this.a(i, (Chunk) object);
+ return MCUtil.ensureMain("Chunk Put", () -> this.a(i, (Chunk) object)); // Paper
}
public Chunk remove(Object object) {
diff --git a/src/main/java/net/minecraft/server/ChunkProviderServer.java b/src/main/java/net/minecraft/server/ChunkProviderServer.java
index 958a4084e..56a76e17e 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/ChunkProviderServer.java
+++ b/src/main/java/net/minecraft/server/ChunkProviderServer.java
@@ -38,9 +38,9 @@ public class ChunkProviderServer implements IChunkProvider {
public final Long2ObjectMap<Chunk> chunks = Long2ObjectMaps.synchronize(new ChunkMap(8192));
@@ -35,12 +35,12 @@ public class ChunkProviderServer implements IChunkProvider {
private long lastProcessedSaves = 0L; // Paper
private long lastSaveStatPrinted = System.currentTimeMillis();
// Paper end
- public final Long2ObjectMap<Chunk> chunks = Long2ObjectMaps.synchronize(new ChunkMap(8192));
+ public final Long2ObjectMap<Chunk> chunks = new ChunkMap(8192); // Paper - remove synchronize - we keep everything on main for manip
private Chunk lastChunk;
private final ChunkTaskScheduler chunkScheduler;
- private final SchedulerBatch<ChunkCoordIntPair, ChunkStatus, ProtoChunk> batchScheduler;
@ -550,7 +660,7 @@ index 958a4084e..56a76e17e 100644
}
diff --git a/src/main/java/net/minecraft/server/ChunkRegionLoader.java b/src/main/java/net/minecraft/server/ChunkRegionLoader.java
index c233b7e90..edd074252 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/ChunkRegionLoader.java
+++ b/src/main/java/net/minecraft/server/ChunkRegionLoader.java
@@ -120,7 +120,7 @@ public class ChunkRegionLoader implements IChunkLoader, IAsyncChunkSaver {
@ -577,7 +687,7 @@ index c233b7e90..edd074252 100644
completion = new Supplier<NBTTagCompound>() {
public NBTTagCompound get() {
diff --git a/src/main/java/net/minecraft/server/ChunkSection.java b/src/main/java/net/minecraft/server/ChunkSection.java
index bdfc7d81f..a5c4564d6 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/ChunkSection.java
+++ b/src/main/java/net/minecraft/server/ChunkSection.java
@@ -24,7 +24,17 @@ public class ChunkSection {
@ -599,7 +709,7 @@ index bdfc7d81f..a5c4564d6 100644
public IBlockData getType(int i, int j, int k) {
return this.blockIds.a(i, j, k);
diff --git a/src/main/java/net/minecraft/server/ChunkTaskScheduler.java b/src/main/java/net/minecraft/server/ChunkTaskScheduler.java
index 34019bd1b..fc9091c80 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/ChunkTaskScheduler.java
+++ b/src/main/java/net/minecraft/server/ChunkTaskScheduler.java
@@ -20,13 +20,14 @@ public class ChunkTaskScheduler extends Scheduler<ChunkCoordIntPair, ChunkStatus
@ -670,7 +780,7 @@ index 34019bd1b..fc9091c80 100644
protected ProtoChunk a(ChunkCoordIntPair chunkcoordintpair, ChunkStatus chunkstatus, Map<ChunkCoordIntPair, ProtoChunk> map) {
diff --git a/src/main/java/net/minecraft/server/DataPaletteBlock.java b/src/main/java/net/minecraft/server/DataPaletteBlock.java
index 71a3636be..ff0fe2541 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/DataPaletteBlock.java
+++ b/src/main/java/net/minecraft/server/DataPaletteBlock.java
@@ -3,7 +3,7 @@ package net.minecraft.server;
@ -755,7 +865,7 @@ index 71a3636be..ff0fe2541 100644
// Paper start - Anti-Xray - Support default methods
diff --git a/src/main/java/net/minecraft/server/DefinedStructureManager.java b/src/main/java/net/minecraft/server/DefinedStructureManager.java
index 271dc41d4..bd15534c2 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/DefinedStructureManager.java
+++ b/src/main/java/net/minecraft/server/DefinedStructureManager.java
@@ -19,7 +19,7 @@ import org.apache.logging.log4j.Logger;
@ -768,7 +878,7 @@ index 271dc41d4..bd15534c2 100644
private final MinecraftServer d;
private final java.nio.file.Path e;
diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
index 0237049a4..cd601f29a 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/Entity.java
+++ b/src/main/java/net/minecraft/server/Entity.java
@@ -209,7 +209,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
@ -781,7 +891,7 @@ index 0237049a4..cd601f29a 100644
this.aJ = Sets.newHashSet();
this.aL = new double[] { 0.0D, 0.0D, 0.0D};
diff --git a/src/main/java/net/minecraft/server/IChunkLoader.java b/src/main/java/net/minecraft/server/IChunkLoader.java
index 4698ee99f..dfb45cc4e 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/IChunkLoader.java
+++ b/src/main/java/net/minecraft/server/IChunkLoader.java
@@ -6,6 +6,8 @@ import javax.annotation.Nullable;
@ -794,7 +904,7 @@ index 4698ee99f..dfb45cc4e 100644
Chunk a(GeneratorAccess generatoraccess, int i, int j, Consumer<Chunk> consumer) throws IOException;
diff --git a/src/main/java/net/minecraft/server/MathHelper.java b/src/main/java/net/minecraft/server/MathHelper.java
index 49fba0979..9ad646f8d 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/MathHelper.java
+++ b/src/main/java/net/minecraft/server/MathHelper.java
@@ -142,6 +142,7 @@ public class MathHelper {
@ -806,7 +916,7 @@ index 49fba0979..9ad646f8d 100644
fx = fx % 360.0F;
if (fx >= 180.0F) {
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 98d182fdb..487d98eb1 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -503,6 +503,7 @@ public abstract class MinecraftServer implements IAsyncTaskHandler, IMojangStati
@ -904,7 +1014,7 @@ index 98d182fdb..487d98eb1 100644
diff --git a/src/main/java/net/minecraft/server/PaperAsyncChunkProvider.java b/src/main/java/net/minecraft/server/PaperAsyncChunkProvider.java
new file mode 100644
index 000000000..5823917a6
index 7ac07ac07ac0..7ac07ac07ac0
--- /dev/null
+++ b/src/main/java/net/minecraft/server/PaperAsyncChunkProvider.java
@@ -0,0 +1,593 @@
@ -1502,7 +1612,7 @@ index 000000000..5823917a6
+
+}
diff --git a/src/main/java/net/minecraft/server/PlayerChunk.java b/src/main/java/net/minecraft/server/PlayerChunk.java
index 2c7c8adf7..aabd107fe 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/PlayerChunk.java
+++ b/src/main/java/net/minecraft/server/PlayerChunk.java
@@ -29,16 +29,62 @@ public class PlayerChunk {
@ -1607,7 +1717,7 @@ index 2c7c8adf7..aabd107fe 100644
}
}
diff --git a/src/main/java/net/minecraft/server/PlayerChunkMap.java b/src/main/java/net/minecraft/server/PlayerChunkMap.java
index d1a443ca8..1504bd113 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/PlayerChunkMap.java
+++ b/src/main/java/net/minecraft/server/PlayerChunkMap.java
@@ -27,10 +27,10 @@ public class PlayerChunkMap {
@ -1667,7 +1777,7 @@ index d1a443ca8..1504bd113 100644
private void e() {
diff --git a/src/main/java/net/minecraft/server/RegionLimitedWorldAccess.java b/src/main/java/net/minecraft/server/RegionLimitedWorldAccess.java
index 3c35c0f48..187ca2813 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/RegionLimitedWorldAccess.java
+++ b/src/main/java/net/minecraft/server/RegionLimitedWorldAccess.java
@@ -35,7 +35,7 @@ public class RegionLimitedWorldAccess implements GeneratorAccess {
@ -1680,7 +1790,7 @@ index 3c35c0f48..187ca2813 100644
this.m = world.getChunkProvider().getChunkGenerator().getSettings();
this.i = world.getSeaLevel();
diff --git a/src/main/java/net/minecraft/server/SchedulerBatch.java b/src/main/java/net/minecraft/server/SchedulerBatch.java
index d868149d1..0d45d933e 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/SchedulerBatch.java
+++ b/src/main/java/net/minecraft/server/SchedulerBatch.java
@@ -9,6 +9,7 @@ public class SchedulerBatch<K, T extends SchedulerTask<K, T>, R> {
@ -1735,7 +1845,7 @@ index d868149d1..0d45d933e 100644
}
}
diff --git a/src/main/java/net/minecraft/server/StructurePiece.java b/src/main/java/net/minecraft/server/StructurePiece.java
index a5cf017da..def8730b8 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/StructurePiece.java
+++ b/src/main/java/net/minecraft/server/StructurePiece.java
@@ -14,7 +14,7 @@ public abstract class StructurePiece {
@ -1762,7 +1872,7 @@ index a5cf017da..def8730b8 100644
return null;
}
diff --git a/src/main/java/net/minecraft/server/StructureStart.java b/src/main/java/net/minecraft/server/StructureStart.java
index f87182b5c..574930f5f 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/StructureStart.java
+++ b/src/main/java/net/minecraft/server/StructureStart.java
@@ -6,7 +6,7 @@ import java.util.List;
@ -1811,7 +1921,7 @@ index f87182b5c..574930f5f 100644
}
diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index a2559f0c1..bbcedb8fc 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -46,7 +46,7 @@ import org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason;
@ -1908,7 +2018,7 @@ index a2559f0c1..bbcedb8fc 100644
if (entity == null) return false;
if (entity.valid) { MinecraftServer.LOGGER.error("Attempted Double World add on " + entity, new Throwable()); return true; } // Paper
diff --git a/src/main/java/net/minecraft/server/WorldGenStronghold.java b/src/main/java/net/minecraft/server/WorldGenStronghold.java
index fa99fe014..4f49786aa 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/WorldGenStronghold.java
+++ b/src/main/java/net/minecraft/server/WorldGenStronghold.java
@@ -9,24 +9,29 @@ import java.util.Random;
@ -2055,7 +2165,7 @@ index fa99fe014..4f49786aa 100644
}
}
diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java
index ad3fea9c9..0a7648263 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/WorldServer.java
+++ b/src/main/java/net/minecraft/server/WorldServer.java
@@ -731,7 +731,7 @@ public class WorldServer extends World implements IAsyncTaskHandler {
@ -2068,7 +2178,7 @@ index ad3fea9c9..0a7648263 100644
}
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index 9c7b86a55..206cb30f6 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -1014,8 +1014,12 @@ public final class CraftServer implements Server {
@ -2096,7 +2206,7 @@ index 9c7b86a55..206cb30f6 100644
}
}
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index d0110070a..02b6bf299 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -157,6 +157,16 @@ public class CraftWorld implements World {
@ -2134,7 +2244,7 @@ index d0110070a..02b6bf299 100644
if (isChunkLoaded(chunkCoordX + x, chunkCoordZ + z)) {
unloadChunk(chunkCoordX + x, chunkCoordZ + z);
diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
index 9e903159d..4ead18b66 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
@@ -78,6 +78,7 @@ public class CraftEventFactory {
@ -2196,7 +2306,7 @@ index 9e903159d..4ead18b66 100644
if (!event.isCancelled()) {
diff --git a/src/main/java/org/bukkit/craftbukkit/generator/CustomChunkGenerator.java b/src/main/java/org/bukkit/craftbukkit/generator/CustomChunkGenerator.java
index 9c2adb235..62c197b80 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/org/bukkit/craftbukkit/generator/CustomChunkGenerator.java
+++ b/src/main/java/org/bukkit/craftbukkit/generator/CustomChunkGenerator.java
@@ -21,6 +21,7 @@ public class CustomChunkGenerator extends InternalChunkGenerator<GeneratorSettin

View File

@ -1,11 +1,11 @@
From 7b0e1ee3eb6ff96297023b8d32b32dc1627bfd9f Mon Sep 17 00:00:00 2001
From 7ac07ac07ac07ac07ac07ac07ac07ac07ac07ac0 Mon Sep 17 00:00:00 2001
From: Caleb Bassham <caleb.bassham@gmail.com>
Date: Fri, 28 Sep 2018 02:32:19 -0500
Subject: [PATCH] Call player spectator target events
diff --git a/src/main/java/net/minecraft/server/EntityPlayer.java b/src/main/java/net/minecraft/server/EntityPlayer.java
index 5ab4e01ed..4ca5cfe9a 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/EntityPlayer.java
+++ b/src/main/java/net/minecraft/server/EntityPlayer.java
@@ -62,7 +62,7 @@ public class EntityPlayer extends EntityHuman implements ICrafting {

View File

@ -1,54 +0,0 @@
From 7e6256031e8db371c47b33f612150c7c0f9aee17 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Wed, 17 Oct 2018 22:31:54 -0400
Subject: [PATCH] Ensure chunk neighbor counts do not get desynced
Mojang was not checking that the chunk did not overwrite, or
was successfully removed.
We're seeing odd reports in #1561 that indicates issues around
this are having problems.
diff --git a/src/main/java/net/minecraft/server/ChunkMap.java b/src/main/java/net/minecraft/server/ChunkMap.java
index 39ac032b0b..1fb0770015 100644
--- a/src/main/java/net/minecraft/server/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/ChunkMap.java
@@ -17,6 +17,7 @@ public class ChunkMap extends Long2ObjectOpenHashMap<Chunk> {
chunk.world.timings.syncChunkLoadPostTimer.startTiming(); // Paper
lastChunkByPos = chunk; // Paper
Chunk chunk1 = (Chunk) super.put(i, chunk);
+ if (chunk1 == null) { // Paper - we should never be overwriting chunks
ChunkCoordIntPair chunkcoordintpair = new ChunkCoordIntPair(i);
for (int j = chunkcoordintpair.x - 1; j <= chunkcoordintpair.x + 1; ++j) {
@@ -47,7 +48,11 @@ public class ChunkMap extends Long2ObjectOpenHashMap<Chunk> {
chunk.setNeighborLoaded(x, z);
}
}
+ // Paper start
+ } } else {
+ a.error("Overwrote existing chunk! (" + chunk.world.getWorld().getName() + ":" + chunk.locX+"," + chunk.locZ + ")", new IllegalStateException());
}
+ // Paper end
// Paper start - if this is a spare chunk (not part of any players view distance), go ahead and queue it for unload.
if (!((WorldServer)chunk.world).getPlayerChunkMap().isChunkInUse(chunk.locX, chunk.locZ)) {
if (chunk.world.paperConfig.delayChunkUnloadsBy > 0) {
@@ -69,6 +74,7 @@ public class ChunkMap extends Long2ObjectOpenHashMap<Chunk> {
public Chunk a(long i) {
Chunk chunk = (Chunk) super.remove(i);
+ if (chunk != null) { // Paper - don't decrement if we didn't remove anything
ChunkCoordIntPair chunkcoordintpair = new ChunkCoordIntPair(i);
for (int j = chunkcoordintpair.x - 1; j <= chunkcoordintpair.x + 1; ++j) {
@@ -84,6 +90,7 @@ public class ChunkMap extends Long2ObjectOpenHashMap<Chunk> {
}
// Paper start
+ } // close if (chunk != null)
if (lastChunkByPos != null && i == lastChunkByPos.chunkKey) {
lastChunkByPos = null;
}
--
2.19.1

View File

@ -1,4 +1,4 @@
From 43ace256826b0ea801936d572b0ca36b80dbb8b7 Mon Sep 17 00:00:00 2001
From 7ac07ac07ac07ac07ac07ac07ac07ac07ac07ac0 Mon Sep 17 00:00:00 2001
From: Andrew Steinborn <git@steinborn.me>
Date: Mon, 8 Oct 2018 14:36:14 -0400
Subject: [PATCH] Add Velocity IP Forwarding Support
@ -14,7 +14,7 @@ forwarding, and is integrated into the Minecraft login process by using the 1.13
login plugin message packet.
diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
index 352166725..70f650bb2 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
@@ -8,6 +8,7 @@ import java.io.IOException;
@ -55,7 +55,7 @@ index 352166725..70f650bb2 100644
}
diff --git a/src/main/java/com/destroystokyo/paper/proxy/VelocityProxy.java b/src/main/java/com/destroystokyo/paper/proxy/VelocityProxy.java
new file mode 100644
index 000000000..fdd8708f9
index 7ac07ac07ac0..7ac07ac07ac0
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/proxy/VelocityProxy.java
@@ -0,0 +1,67 @@
@ -127,7 +127,7 @@ index 000000000..fdd8708f9
+ }
+}
diff --git a/src/main/java/net/minecraft/server/LoginListener.java b/src/main/java/net/minecraft/server/LoginListener.java
index 5778a5201..b6a3992a3 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/LoginListener.java
+++ b/src/main/java/net/minecraft/server/LoginListener.java
@@ -43,6 +43,7 @@ public class LoginListener implements PacketLoginInListener, ITickable {
@ -203,7 +203,7 @@ index 5778a5201..b6a3992a3 100644
}
diff --git a/src/main/java/net/minecraft/server/NetworkManager.java b/src/main/java/net/minecraft/server/NetworkManager.java
index b2afec5e4..97a9dffe6 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/NetworkManager.java
+++ b/src/main/java/net/minecraft/server/NetworkManager.java
@@ -48,7 +48,7 @@ public class NetworkManager extends SimpleChannelInboundHandler<Packet<?>> {
@ -216,7 +216,7 @@ index b2afec5e4..97a9dffe6 100644
public com.mojang.authlib.properties.Property[] spoofedProfile;
public boolean preparing = true;
diff --git a/src/main/java/net/minecraft/server/PacketDataSerializer.java b/src/main/java/net/minecraft/server/PacketDataSerializer.java
index cab837483..fb6e373f0 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/PacketDataSerializer.java
+++ b/src/main/java/net/minecraft/server/PacketDataSerializer.java
@@ -140,6 +140,7 @@ public class PacketDataSerializer extends ByteBuf {
@ -244,7 +244,7 @@ index cab837483..fb6e373f0 100644
int j = this.g();
diff --git a/src/main/java/net/minecraft/server/PacketLoginInCustomPayload.java b/src/main/java/net/minecraft/server/PacketLoginInCustomPayload.java
index e3c0094f7..edfd4a506 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/PacketLoginInCustomPayload.java
+++ b/src/main/java/net/minecraft/server/PacketLoginInCustomPayload.java
@@ -3,8 +3,8 @@ package net.minecraft.server;
@ -259,7 +259,7 @@ index e3c0094f7..edfd4a506 100644
public PacketLoginInCustomPayload() {
}
diff --git a/src/main/java/net/minecraft/server/PacketLoginOutCustomPayload.java b/src/main/java/net/minecraft/server/PacketLoginOutCustomPayload.java
index 9c5559ece..9de0421bb 100644
index 7ac07ac07ac0..7ac07ac07ac0 100644
--- a/src/main/java/net/minecraft/server/PacketLoginOutCustomPayload.java
+++ b/src/main/java/net/minecraft/server/PacketLoginOutCustomPayload.java
@@ -10,6 +10,14 @@ public class PacketLoginOutCustomPayload implements Packet<PacketLoginOutListene