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Fix race condition with regionfile being closed right after getting one (#2812) 

Occurs when 1 thread retrieves a regionfile, and then the
regionfile is closed due to it being thrown out of cache.
This commit is contained in:
Spottedleaf 2020-01-09 17:42:33 -08:00 committed by Zach
parent a817508fc7
commit db3af11cea
1 changed files with 126 additions and 42 deletions
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168
Spigot-Server-Patches/0395-Asynchronous-chunk-IO-and-loading.patch
View File

@ -1,4 +1,4 @@
From 48e633b295c6057e28af0232c11505c3e81100ff Mon Sep 17 00:00:00 2001
From 4208dd633a9e5175b7eb7db8f090e21e35c9dd9d Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Sat, 13 Jul 2019 09:23:10 -0700
Subject: [PATCH] Asynchronous chunk IO and loading
@ -121,7 +121,7 @@ tasks required to be executed by the chunk load task (i.e lighting
and some poi tasks).
diff --git a/src/main/java/co/aikar/timings/WorldTimingsHandler.java b/src/main/java/co/aikar/timings/WorldTimingsHandler.java
index 3a79cde595..8de6c4816c 100644
index 3a79cde59..8de6c4816 100644
--- a/src/main/java/co/aikar/timings/WorldTimingsHandler.java
+++ b/src/main/java/co/aikar/timings/WorldTimingsHandler.java
@@ -63,6 +63,17 @@ public class WorldTimingsHandler {
@ -161,7 +161,7 @@ index 3a79cde595..8de6c4816c 100644
public static Timing getTickList(WorldServer worldserver, String timingsType) {
diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
index 546a1cfe0a..1d7d1ffbf7 100644
index 546a1cfe0..1d7d1ffbf 100644
--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
@@ -1,5 +1,6 @@
@ -237,7 +237,7 @@ index 546a1cfe0a..1d7d1ffbf7 100644
+ }
}
diff --git a/src/main/java/com/destroystokyo/paper/antixray/ChunkPacketBlockControllerAntiXray.java b/src/main/java/com/destroystokyo/paper/antixray/ChunkPacketBlockControllerAntiXray.java
index 23626bef3a..1edcecd2ee 100644
index 23626bef3..1edcecd2e 100644
--- a/src/main/java/com/destroystokyo/paper/antixray/ChunkPacketBlockControllerAntiXray.java
+++ b/src/main/java/com/destroystokyo/paper/antixray/ChunkPacketBlockControllerAntiXray.java
@@ -9,6 +9,7 @@ import java.util.concurrent.Executors;
@ -318,7 +318,7 @@ index 23626bef3a..1edcecd2ee 100644
diff --git a/src/main/java/com/destroystokyo/paper/io/IOUtil.java b/src/main/java/com/destroystokyo/paper/io/IOUtil.java
new file mode 100644
index 0000000000..5af0ac3d9e
index 000000000..5af0ac3d9
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/io/IOUtil.java
@@ -0,0 +1,62 @@
@ -386,7 +386,7 @@ index 0000000000..5af0ac3d9e
+}
diff --git a/src/main/java/com/destroystokyo/paper/io/PaperFileIOThread.java b/src/main/java/com/destroystokyo/paper/io/PaperFileIOThread.java
new file mode 100644
index 0000000000..4f10a8311e
index 000000000..4f10a8311
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/io/PaperFileIOThread.java
@@ -0,0 +1,661 @@
@ -1053,7 +1053,7 @@ index 0000000000..4f10a8311e
+}
diff --git a/src/main/java/com/destroystokyo/paper/io/PrioritizedTaskQueue.java b/src/main/java/com/destroystokyo/paper/io/PrioritizedTaskQueue.java
new file mode 100644
index 0000000000..78bd238f4c
index 000000000..78bd238f4
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/io/PrioritizedTaskQueue.java
@@ -0,0 +1,276 @@
@ -1335,7 +1335,7 @@ index 0000000000..78bd238f4c
+}
diff --git a/src/main/java/com/destroystokyo/paper/io/QueueExecutorThread.java b/src/main/java/com/destroystokyo/paper/io/QueueExecutorThread.java
new file mode 100644
index 0000000000..ee906b594b
index 000000000..ee906b594
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/io/QueueExecutorThread.java
@@ -0,0 +1,241 @@
@ -1582,7 +1582,7 @@ index 0000000000..ee906b594b
+}
diff --git a/src/main/java/com/destroystokyo/paper/io/chunk/ChunkLoadTask.java b/src/main/java/com/destroystokyo/paper/io/chunk/ChunkLoadTask.java
new file mode 100644
index 0000000000..305da47868
index 000000000..305da4786
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/io/chunk/ChunkLoadTask.java
@@ -0,0 +1,149 @@
@ -1737,7 +1737,7 @@ index 0000000000..305da47868
+}
diff --git a/src/main/java/com/destroystokyo/paper/io/chunk/ChunkSaveTask.java b/src/main/java/com/destroystokyo/paper/io/chunk/ChunkSaveTask.java
new file mode 100644
index 0000000000..60312b85f9
index 000000000..60312b85f
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/io/chunk/ChunkSaveTask.java
@@ -0,0 +1,112 @@
@ -1855,7 +1855,7 @@ index 0000000000..60312b85f9
+}
diff --git a/src/main/java/com/destroystokyo/paper/io/chunk/ChunkTask.java b/src/main/java/com/destroystokyo/paper/io/chunk/ChunkTask.java
new file mode 100644
index 0000000000..1dfa8abfd8
index 000000000..1dfa8abfd
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/io/chunk/ChunkTask.java
@@ -0,0 +1,40 @@
@ -1901,7 +1901,7 @@ index 0000000000..1dfa8abfd8
+}
diff --git a/src/main/java/com/destroystokyo/paper/io/chunk/ChunkTaskManager.java b/src/main/java/com/destroystokyo/paper/io/chunk/ChunkTaskManager.java
new file mode 100644
index 0000000000..59d73bfad7
index 000000000..59d73bfad
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/io/chunk/ChunkTaskManager.java
@@ -0,0 +1,453 @@
@ -2359,7 +2359,7 @@ index 0000000000..59d73bfad7
+
+}
diff --git a/src/main/java/net/minecraft/server/ChunkProviderServer.java b/src/main/java/net/minecraft/server/ChunkProviderServer.java
index e9cd44fae1..1f6b1c4f16 100644
index e9cd44fae..1f6b1c4f1 100644
--- a/src/main/java/net/minecraft/server/ChunkProviderServer.java
+++ b/src/main/java/net/minecraft/server/ChunkProviderServer.java
@@ -124,11 +124,137 @@ public class ChunkProviderServer extends IChunkProvider {
@ -2529,7 +2529,7 @@ index e9cd44fae1..1f6b1c4f16 100644
} finally {
playerChunkMap.callbackExecutor.run();
diff --git a/src/main/java/net/minecraft/server/ChunkRegionLoader.java b/src/main/java/net/minecraft/server/ChunkRegionLoader.java
index a950ad801d..26f1a4b095 100644
index a950ad801..26f1a4b09 100644
--- a/src/main/java/net/minecraft/server/ChunkRegionLoader.java
+++ b/src/main/java/net/minecraft/server/ChunkRegionLoader.java
@@ -6,6 +6,7 @@ import it.unimi.dsi.fastutil.longs.LongOpenHashSet;
@ -2798,7 +2798,7 @@ index a950ad801d..26f1a4b095 100644
nbttagcompound1.set("PostProcessing", a(ichunkaccess.l()));
diff --git a/src/main/java/net/minecraft/server/ChunkStatus.java b/src/main/java/net/minecraft/server/ChunkStatus.java
index 134a4f0b7d..88f1674616 100644
index 134a4f0b7..88f167461 100644
--- a/src/main/java/net/minecraft/server/ChunkStatus.java
+++ b/src/main/java/net/minecraft/server/ChunkStatus.java
@@ -153,6 +153,7 @@ public class ChunkStatus {
@ -2810,7 +2810,7 @@ index 134a4f0b7d..88f1674616 100644
return ChunkStatus.r.getInt(chunkstatus.c());
}
diff --git a/src/main/java/net/minecraft/server/IAsyncTaskHandler.java b/src/main/java/net/minecraft/server/IAsyncTaskHandler.java
index 7210217913..f7156acb89 100644
index 721021791..f7156acb8 100644
--- a/src/main/java/net/minecraft/server/IAsyncTaskHandler.java
+++ b/src/main/java/net/minecraft/server/IAsyncTaskHandler.java
@@ -91,7 +91,7 @@ public abstract class IAsyncTaskHandler<R extends Runnable> implements Mailbox<R
@ -2823,7 +2823,7 @@ index 7210217913..f7156acb89 100644
;
}
diff --git a/src/main/java/net/minecraft/server/IChunkLoader.java b/src/main/java/net/minecraft/server/IChunkLoader.java
index 2f95174fcc..134c76065b 100644
index 2f95174fc..134c76065 100644
--- a/src/main/java/net/minecraft/server/IChunkLoader.java
+++ b/src/main/java/net/minecraft/server/IChunkLoader.java
@@ -3,37 +3,49 @@ package net.minecraft.server;
@ -2948,7 +2948,7 @@ index 2f95174fcc..134c76065b 100644
+// Paper end
}
diff --git a/src/main/java/net/minecraft/server/MCUtil.java b/src/main/java/net/minecraft/server/MCUtil.java
index 25a87c2d37..c02c53b50b 100644
index 25a87c2d3..c02c53b50 100644
--- a/src/main/java/net/minecraft/server/MCUtil.java
+++ b/src/main/java/net/minecraft/server/MCUtil.java
@@ -530,4 +530,9 @@ public final class MCUtil {
@ -2962,7 +2962,7 @@ index 25a87c2d37..c02c53b50b 100644
+ }
}
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 4eba20b6ab..fe24d924e8 100644
index 4eba20b6a..fe24d924e 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -788,6 +788,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas
@ -2974,7 +2974,7 @@ index 4eba20b6ab..fe24d924e8 100644
public String getServerIp() {
diff --git a/src/main/java/net/minecraft/server/NextTickListEntry.java b/src/main/java/net/minecraft/server/NextTickListEntry.java
index e9c405fb53..33cfeabdee 100644
index e9c405fb5..33cfeabde 100644
--- a/src/main/java/net/minecraft/server/NextTickListEntry.java
+++ b/src/main/java/net/minecraft/server/NextTickListEntry.java
@@ -4,7 +4,7 @@ import java.util.Comparator;
@ -2996,7 +2996,7 @@ index e9c405fb53..33cfeabdee 100644
this.e = t0;
this.b = i;
diff --git a/src/main/java/net/minecraft/server/NibbleArray.java b/src/main/java/net/minecraft/server/NibbleArray.java
index ed8c4a87b5..996c832638 100644
index ed8c4a87b..996c83263 100644
--- a/src/main/java/net/minecraft/server/NibbleArray.java
+++ b/src/main/java/net/minecraft/server/NibbleArray.java
@@ -71,6 +71,7 @@ public class NibbleArray {
@ -3008,7 +3008,7 @@ index ed8c4a87b5..996c832638 100644
return this.a == null ? new NibbleArray() : new NibbleArray((byte[]) this.a.clone());
}
diff --git a/src/main/java/net/minecraft/server/PlayerChunk.java b/src/main/java/net/minecraft/server/PlayerChunk.java
index 7a1578afaa..0fb9c1e441 100644
index 7a1578afa..0fb9c1e44 100644
--- a/src/main/java/net/minecraft/server/PlayerChunk.java
+++ b/src/main/java/net/minecraft/server/PlayerChunk.java
@@ -310,7 +310,7 @@ public class PlayerChunk {
@ -3034,7 +3034,7 @@ index 7a1578afaa..0fb9c1e441 100644
completablefuture = (CompletableFuture) this.statusFutures.get(i);
if (completablefuture != null) {
diff --git a/src/main/java/net/minecraft/server/PlayerChunkMap.java b/src/main/java/net/minecraft/server/PlayerChunkMap.java
index 3825520fa1..d9faef8a67 100644
index 3825520fa..0ad11ba68 100644
--- a/src/main/java/net/minecraft/server/PlayerChunkMap.java
+++ b/src/main/java/net/minecraft/server/PlayerChunkMap.java
@@ -63,7 +63,7 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
@ -3428,14 +3428,16 @@ index 3825520fa1..d9faef8a67 100644
@Nullable
public NBTTagCompound readChunkData(ChunkCoordIntPair chunkcoordintpair) throws IOException { // Paper - private -> public
NBTTagCompound nbttagcompound = this.read(chunkcoordintpair);
@@ -925,33 +1085,53 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
@@ -925,33 +1085,55 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
// Paper start - chunk status cache "api"
public ChunkStatus getChunkStatusOnDiskIfCached(ChunkCoordIntPair chunkPos) {
- RegionFile regionFile = this.getIOWorker().getRegionFileCache().getRegionFileIfLoaded(chunkPos);
+ synchronized (this) { // Paper
+ RegionFile regionFile = this.getRegionFileIfLoaded(chunkPos);
return regionFile == null ? null : regionFile.getStatusIfCached(chunkPos.x, chunkPos.z);
+ } // Paper
}
public ChunkStatus getChunkStatusOnDisk(ChunkCoordIntPair chunkPos) throws IOException {
@ -3493,7 +3495,7 @@ index 3825520fa1..d9faef8a67 100644
}
public IChunkAccess getUnloadingChunk(int chunkX, int chunkZ) {
@@ -960,6 +1140,39 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
@@ -960,6 +1142,39 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
}
// Paper end
@ -3533,7 +3535,7 @@ index 3825520fa1..d9faef8a67 100644
boolean isOutsideOfRange(ChunkCoordIntPair chunkcoordintpair) {
// Spigot start
return isOutsideOfRange(chunkcoordintpair, false);
@@ -1304,6 +1517,7 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
@@ -1304,6 +1519,7 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
}
@ -3542,10 +3544,19 @@ index 3825520fa1..d9faef8a67 100644
return this.m;
}
diff --git a/src/main/java/net/minecraft/server/RegionFile.java b/src/main/java/net/minecraft/server/RegionFile.java
index d37abf2cf3..0de24c792e 100644
index d37abf2cf..df728e2c0 100644
--- a/src/main/java/net/minecraft/server/RegionFile.java
+++ b/src/main/java/net/minecraft/server/RegionFile.java
@@ -224,7 +224,7 @@ public class RegionFile implements AutoCloseable {
@@ -36,6 +36,8 @@ public class RegionFile implements AutoCloseable {
private final RegionFileBitSet freeSectors;
public final File file;
+ public final java.util.concurrent.locks.ReentrantLock fileLock = new java.util.concurrent.locks.ReentrantLock(true); // Paper
+
// Paper start - Cache chunk status
private final ChunkStatus[] statuses = new ChunkStatus[32 * 32];
@@ -224,7 +226,7 @@ public class RegionFile implements AutoCloseable {
return (i + 4096 - 1) / 4096;
}
@ -3554,17 +3565,31 @@ index d37abf2cf3..0de24c792e 100644
int i = this.getOffset(chunkcoordintpair);
if (i == 0) {
@@ -379,7 +379,7 @@ public class RegionFile implements AutoCloseable {
return chunkcoordintpair.j() + chunkcoordintpair.k() * 32;
@@ -380,6 +382,11 @@ public class RegionFile implements AutoCloseable {
}
- public void close() throws IOException {
+ public synchronized void close() throws IOException { // Paper - Synchronized
public void close() throws IOException {
+ // Paper start - Prevent regionfiles from being closed during use
+ this.fileLock.lock();
+ synchronized (this) {
+ try {
+ // Paper end
this.closed = true; // Paper
try {
this.c();
@@ -394,6 +401,10 @@ public class RegionFile implements AutoCloseable {
}
}
}
+ } finally { // Paper start - Prevent regionfiles from being closed during use
+ this.fileLock.unlock();
+ }
+ } // Paper end
}
diff --git a/src/main/java/net/minecraft/server/RegionFileCache.java b/src/main/java/net/minecraft/server/RegionFileCache.java
index e07ae98540..d927f93211 100644
index e07ae9854..0f201000f 100644
--- a/src/main/java/net/minecraft/server/RegionFileCache.java
+++ b/src/main/java/net/minecraft/server/RegionFileCache.java
@@ -9,7 +9,7 @@ import java.io.File;
@ -3576,7 +3601,7 @@ index e07ae98540..d927f93211 100644
public final Long2ObjectLinkedOpenHashMap<RegionFile> cache = new Long2ObjectLinkedOpenHashMap();
private final File b;
@@ -20,12 +20,12 @@ public final class RegionFileCache implements AutoCloseable {
@@ -20,16 +20,27 @@ public final class RegionFileCache implements AutoCloseable {
// Paper start
@ -3588,11 +3613,70 @@ index e07ae98540..d927f93211 100644
// Paper end
- public RegionFile getFile(ChunkCoordIntPair chunkcoordintpair, boolean existingOnly) throws IOException { // CraftBukkit // Paper - private > public
+ public synchronized RegionFile getFile(ChunkCoordIntPair chunkcoordintpair, boolean existingOnly) throws IOException { // CraftBukkit // Paper - private > public, synchronize
+ // Paper start - add lock parameter
+ return this.getFile(chunkcoordintpair, existingOnly, false);
+ }
+ public synchronized RegionFile getFile(ChunkCoordIntPair chunkcoordintpair, boolean existingOnly, boolean lock) throws IOException {
+ // Paper end
long i = ChunkCoordIntPair.pair(chunkcoordintpair.getRegionX(), chunkcoordintpair.getRegionZ());
RegionFile regionfile = (RegionFile) this.cache.getAndMoveToFirst(i);
@@ -201,7 +201,7 @@ public final class RegionFileCache implements AutoCloseable {
if (regionfile != null) {
+ // Paper start
+ if (lock) {
+ // must be in this synchronized block
+ regionfile.fileLock.lock();
+ }
+ // Paper end
return regionfile;
} else {
if (this.cache.size() >= com.destroystokyo.paper.PaperConfig.regionFileCacheSize) { // Paper - configurable
@@ -45,6 +56,12 @@ public final class RegionFileCache implements AutoCloseable {
RegionFile regionfile1 = new RegionFile(file, this.b);
this.cache.putAndMoveToFirst(i, regionfile1);
+ // Paper start
+ if (lock) {
+ // must be in this synchronized block
+ regionfile1.fileLock.lock();
+ }
+ // Paper end
return regionfile1;
}
}
@@ -119,7 +136,8 @@ public final class RegionFileCache implements AutoCloseable {
@Nullable
public NBTTagCompound read(ChunkCoordIntPair chunkcoordintpair) throws IOException {
- RegionFile regionfile = this.getFile(chunkcoordintpair, false); // CraftBukkit
+ RegionFile regionfile = this.getFile(chunkcoordintpair, false, true); // CraftBukkit // Paper
+ try { // Paper
DataInputStream datainputstream = regionfile.a(chunkcoordintpair);
// Paper start
if (regionfile.isOversized(chunkcoordintpair.x, chunkcoordintpair.z)) {
@@ -157,10 +175,14 @@ public final class RegionFileCache implements AutoCloseable {
}
return nbttagcompound;
+ } finally { // Paper start
+ regionfile.fileLock.unlock();
+ } // Paper end
}
protected void write(ChunkCoordIntPair chunkcoordintpair, NBTTagCompound nbttagcompound) throws IOException {
- RegionFile regionfile = this.getFile(chunkcoordintpair, false); // CraftBukkit
+ RegionFile regionfile = this.getFile(chunkcoordintpair, false, true); // CraftBukkit // Paper
+ try { // Paper
int attempts = 0; Exception laste = null; while (attempts++ < 5) { try { // Paper
DataOutputStream dataoutputstream = regionfile.c(chunkcoordintpair);
Throwable throwable = null;
@@ -199,9 +221,12 @@ public final class RegionFileCache implements AutoCloseable {
MinecraftServer.LOGGER.error("Failed to save chunk", laste);
}
// Paper end
+ } finally { // Paper start
+ regionfile.fileLock.unlock();
+ } // Paper end
}
- public void close() throws IOException {
@ -3600,7 +3684,7 @@ index e07ae98540..d927f93211 100644
ObjectIterator objectiterator = this.cache.values().iterator();
while (objectiterator.hasNext()) {
@@ -213,7 +213,7 @@ public final class RegionFileCache implements AutoCloseable {
@@ -213,7 +238,7 @@ public final class RegionFileCache implements AutoCloseable {
}
// CraftBukkit start
@ -3610,7 +3694,7 @@ index e07ae98540..d927f93211 100644
return regionfile != null ? regionfile.chunkExists(pos) : false;
diff --git a/src/main/java/net/minecraft/server/RegionFileSection.java b/src/main/java/net/minecraft/server/RegionFileSection.java
index db9f0196bd..a6d8ef5eb4 100644
index db9f0196b..a6d8ef5eb 100644
--- a/src/main/java/net/minecraft/server/RegionFileSection.java
+++ b/src/main/java/net/minecraft/server/RegionFileSection.java
@@ -20,28 +20,29 @@ import javax.annotation.Nullable;
@ -3746,7 +3830,7 @@ index db9f0196bd..a6d8ef5eb4 100644
+ // Paper end
}
diff --git a/src/main/java/net/minecraft/server/TicketType.java b/src/main/java/net/minecraft/server/TicketType.java
index 335b644351..481d954808 100644
index 335b64435..481d95480 100644
--- a/src/main/java/net/minecraft/server/TicketType.java
+++ b/src/main/java/net/minecraft/server/TicketType.java
@@ -22,6 +22,7 @@ public class TicketType<T> {
@ -3758,7 +3842,7 @@ index 335b644351..481d954808 100644
public static <T> TicketType<T> a(String s, Comparator<T> comparator) {
return new TicketType<>(s, comparator, 0L);
diff --git a/src/main/java/net/minecraft/server/VillagePlace.java b/src/main/java/net/minecraft/server/VillagePlace.java
index c999f8c9bf..b59ef1a633 100644
index c999f8c9b..b59ef1a63 100644
--- a/src/main/java/net/minecraft/server/VillagePlace.java
+++ b/src/main/java/net/minecraft/server/VillagePlace.java
@@ -24,8 +24,16 @@ public class VillagePlace extends RegionFileSection<VillagePlaceSection> {
@ -3847,7 +3931,7 @@ index c999f8c9bf..b59ef1a633 100644
HAS_SPACE(VillagePlaceRecord::d), IS_OCCUPIED(VillagePlaceRecord::e), ANY((villageplacerecord) -> {
diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java
index 90272d0c00..136c18d10b 100644
index 90272d0c0..136c18d10 100644
--- a/src/main/java/net/minecraft/server/WorldServer.java
+++ b/src/main/java/net/minecraft/server/WorldServer.java
@@ -82,6 +82,79 @@ public class WorldServer extends World {
@ -3940,7 +4024,7 @@ index 90272d0c00..136c18d10b 100644
// CraftBukkit start
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 2a33b90efd..0d036e5d96 100644
index 2a33b90ef..0d036e5d9 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -555,22 +555,23 @@ public class CraftWorld implements World {
@ -4002,7 +4086,7 @@ index 2a33b90efd..0d036e5d96 100644
@Override
public int getViewDistance() {
diff --git a/src/main/java/org/spigotmc/WatchdogThread.java b/src/main/java/org/spigotmc/WatchdogThread.java
index 07936eeba2..fe68df45ba 100644
index 07936eeba..fe68df45b 100644
--- a/src/main/java/org/spigotmc/WatchdogThread.java
+++ b/src/main/java/org/spigotmc/WatchdogThread.java
@@ -6,6 +6,7 @@ import java.lang.management.ThreadInfo;