feat: do not wait for chunk loads when calling

worldedit-bukkit/adapters/adapter-1_20_2/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_20_R2/PaperweightGetBlocks.java

@@ -9,8 +9,10 @@ import com.fastasyncworldedit.core.extent.processor.heightmap.HeightMapType;
 import com.fastasyncworldedit.core.math.BitArrayUnstretched;
 import com.fastasyncworldedit.core.math.IntPair;
 import com.fastasyncworldedit.core.nbt.FaweCompoundTag;
+import com.fastasyncworldedit.core.queue.IChunk;
 import com.fastasyncworldedit.core.queue.IChunkGet;
 import com.fastasyncworldedit.core.queue.IChunkSet;
+import com.fastasyncworldedit.core.queue.IQueueExtent;
 import com.fastasyncworldedit.core.queue.implementation.QueueHandler;
 import com.fastasyncworldedit.core.queue.implementation.blocks.CharGetBlocks;
 import com.fastasyncworldedit.core.util.MathMan;
@@ -423,7 +425,7 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
 
     @Override
     @SuppressWarnings("rawtypes")
-    public synchronized <T extends Future<T>> T call(IChunkSet set, Runnable finalizer) {
+    public synchronized <T extends Future<T>> T call(IQueueExtent<? extends IChunk> owner, IChunkSet set, Runnable finalizer) {
         if (!callLock.isHeldByCurrentThread()) {
             throw new IllegalStateException("Attempted to call chunk GET but chunk was not call-locked.");
         }

worldedit-bukkit/adapters/adapter-1_20_2/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_20_R2/PaperweightGetBlocks_Copy.java

@@ -3,8 +3,10 @@ package com.sk89q.worldedit.bukkit.adapter.impl.fawe.v1_20_R2;
 import com.fastasyncworldedit.core.extent.processor.heightmap.HeightMapType;
 import com.fastasyncworldedit.core.nbt.FaweCompoundTag;
 import com.fastasyncworldedit.core.queue.IBlocks;
+import com.fastasyncworldedit.core.queue.IChunk;
 import com.fastasyncworldedit.core.queue.IChunkGet;
 import com.fastasyncworldedit.core.queue.IChunkSet;
+import com.fastasyncworldedit.core.queue.IQueueExtent;
 import com.fastasyncworldedit.core.util.NbtUtils;
 import com.sk89q.worldedit.bukkit.WorldEditPlugin;
 import com.sk89q.worldedit.bukkit.adapter.BukkitImplAdapter;
@@ -254,7 +256,7 @@ public class PaperweightGetBlocks_Copy implements IChunkGet {
     }
 
     @Override
-    public <T extends Future<T>> T call(IChunkSet set, Runnable finalize) {
+    public <T extends Future<T>> T call(IQueueExtent<? extends IChunk> owner, IChunkSet set, Runnable finalize) {
         return null;
     }
 

worldedit-bukkit/adapters/adapter-1_20_4/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_20_R3/PaperweightGetBlocks.java

@@ -9,8 +9,10 @@ import com.fastasyncworldedit.core.extent.processor.heightmap.HeightMapType;
 import com.fastasyncworldedit.core.math.BitArrayUnstretched;
 import com.fastasyncworldedit.core.math.IntPair;
 import com.fastasyncworldedit.core.nbt.FaweCompoundTag;
+import com.fastasyncworldedit.core.queue.IChunk;
 import com.fastasyncworldedit.core.queue.IChunkGet;
 import com.fastasyncworldedit.core.queue.IChunkSet;
+import com.fastasyncworldedit.core.queue.IQueueExtent;
 import com.fastasyncworldedit.core.queue.implementation.QueueHandler;
 import com.fastasyncworldedit.core.queue.implementation.blocks.CharGetBlocks;
 import com.fastasyncworldedit.core.util.MathMan;
@@ -423,7 +425,7 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
 
     @Override
     @SuppressWarnings("rawtypes")
-    public synchronized <T extends Future<T>> T call(IChunkSet set, Runnable finalizer) {
+    public synchronized <T extends Future<T>> T call(IQueueExtent<? extends IChunk> owner, IChunkSet set, Runnable finalizer) {
         if (!callLock.isHeldByCurrentThread()) {
             throw new IllegalStateException("Attempted to call chunk GET but chunk was not call-locked.");
         }

worldedit-bukkit/adapters/adapter-1_20_4/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_20_R3/PaperweightGetBlocks_Copy.java

@@ -3,8 +3,10 @@ package com.sk89q.worldedit.bukkit.adapter.impl.fawe.v1_20_R3;
 import com.fastasyncworldedit.core.extent.processor.heightmap.HeightMapType;
 import com.fastasyncworldedit.core.nbt.FaweCompoundTag;
 import com.fastasyncworldedit.core.queue.IBlocks;
+import com.fastasyncworldedit.core.queue.IChunk;
 import com.fastasyncworldedit.core.queue.IChunkGet;
 import com.fastasyncworldedit.core.queue.IChunkSet;
+import com.fastasyncworldedit.core.queue.IQueueExtent;
 import com.fastasyncworldedit.core.util.NbtUtils;
 import com.sk89q.worldedit.bukkit.WorldEditPlugin;
 import com.sk89q.worldedit.bukkit.adapter.BukkitImplAdapter;
@@ -254,7 +256,7 @@ public class PaperweightGetBlocks_Copy implements IChunkGet {
     }
 
     @Override
-    public <T extends Future<T>> T call(IChunkSet set, Runnable finalize) {
+    public <T extends Future<T>> T call(IQueueExtent<? extends IChunk> owner, IChunkSet set, Runnable finalize) {
         return null;
     }
 

worldedit-bukkit/adapters/adapter-1_20_5/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_20_R4/PaperweightGetBlocks.java

@@ -9,8 +9,10 @@ import com.fastasyncworldedit.core.extent.processor.heightmap.HeightMapType;
 import com.fastasyncworldedit.core.math.BitArrayUnstretched;
 import com.fastasyncworldedit.core.math.IntPair;
 import com.fastasyncworldedit.core.nbt.FaweCompoundTag;
+import com.fastasyncworldedit.core.queue.IChunk;
 import com.fastasyncworldedit.core.queue.IChunkGet;
 import com.fastasyncworldedit.core.queue.IChunkSet;
+import com.fastasyncworldedit.core.queue.IQueueExtent;
 import com.fastasyncworldedit.core.queue.implementation.QueueHandler;
 import com.fastasyncworldedit.core.queue.implementation.blocks.CharGetBlocks;
 import com.fastasyncworldedit.core.util.MathMan;
@@ -424,7 +426,7 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
 
     @Override
     @SuppressWarnings("rawtypes")
-    public synchronized <T extends Future<T>> T call(IChunkSet set, Runnable finalizer) {
+    public synchronized <T extends Future<T>> T call(IQueueExtent<? extends IChunk> owner, IChunkSet set, Runnable finalizer) {
         if (!callLock.isHeldByCurrentThread()) {
             throw new IllegalStateException("Attempted to call chunk GET but chunk was not call-locked.");
         }

worldedit-bukkit/adapters/adapter-1_20_5/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_20_R4/PaperweightGetBlocks_Copy.java

@@ -3,8 +3,10 @@ package com.sk89q.worldedit.bukkit.adapter.impl.fawe.v1_20_R4;
 import com.fastasyncworldedit.core.extent.processor.heightmap.HeightMapType;
 import com.fastasyncworldedit.core.nbt.FaweCompoundTag;
 import com.fastasyncworldedit.core.queue.IBlocks;
+import com.fastasyncworldedit.core.queue.IChunk;
 import com.fastasyncworldedit.core.queue.IChunkGet;
 import com.fastasyncworldedit.core.queue.IChunkSet;
+import com.fastasyncworldedit.core.queue.IQueueExtent;
 import com.fastasyncworldedit.core.util.NbtUtils;
 import com.sk89q.worldedit.bukkit.WorldEditPlugin;
 import com.sk89q.worldedit.bukkit.adapter.BukkitImplAdapter;
@@ -257,7 +259,7 @@ public class PaperweightGetBlocks_Copy implements IChunkGet {
     }
 
     @Override
-    public <T extends Future<T>> T call(IChunkSet set, Runnable finalize) {
+    public <T extends Future<T>> T call(IQueueExtent<? extends IChunk> owner, IChunkSet set, Runnable finalize) {
         return null;
     }
 

worldedit-bukkit/adapters/adapter-1_21/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_21_R1/PaperweightGetBlocks.java

@@ -6,11 +6,14 @@ import com.fastasyncworldedit.core.Fawe;
 import com.fastasyncworldedit.core.FaweCache;
 import com.fastasyncworldedit.core.configuration.Settings;
 import com.fastasyncworldedit.core.extent.processor.heightmap.HeightMapType;
+import com.fastasyncworldedit.core.internal.exception.FaweException;
 import com.fastasyncworldedit.core.math.BitArrayUnstretched;
 import com.fastasyncworldedit.core.math.IntPair;
 import com.fastasyncworldedit.core.nbt.FaweCompoundTag;
+import com.fastasyncworldedit.core.queue.IChunk;
 import com.fastasyncworldedit.core.queue.IChunkGet;
 import com.fastasyncworldedit.core.queue.IChunkSet;
+import com.fastasyncworldedit.core.queue.IQueueExtent;
 import com.fastasyncworldedit.core.queue.implementation.QueueHandler;
 import com.fastasyncworldedit.core.queue.implementation.blocks.CharGetBlocks;
 import com.fastasyncworldedit.core.util.MathMan;
@@ -21,6 +24,7 @@ import com.sk89q.worldedit.bukkit.WorldEditPlugin;
 import com.sk89q.worldedit.internal.Constants;
 import com.sk89q.worldedit.internal.util.LogManagerCompat;
 import com.sk89q.worldedit.math.BlockVector3;
+import com.sk89q.worldedit.util.formatting.text.TextComponent;
 import com.sk89q.worldedit.world.biome.BiomeType;
 import com.sk89q.worldedit.world.biome.BiomeTypes;
 import com.sk89q.worldedit.world.block.BlockTypesCache;
@@ -82,7 +86,9 @@ import java.util.Map;
 import java.util.Set;
 import java.util.UUID;
 import java.util.concurrent.Callable;
+import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Future;
 import java.util.concurrent.Semaphore;
 import java.util.concurrent.locks.ReadWriteLock;
@@ -191,7 +197,7 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
             try {
                 fillLightNibble(light, LightLayer.BLOCK, minSectionPosition, maxSectionPosition);
             } catch (Throwable e) {
-                e.printStackTrace();
+                LOGGER.error("Error setting lighting to get", e);
             }
         }
     }
@@ -203,7 +209,7 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
             try {
                 fillLightNibble(light, LightLayer.SKY, minSectionPosition, maxSectionPosition);
             } catch (Throwable e) {
-                e.printStackTrace();
+                LOGGER.error("Error setting sky lighting to get", e);
             }
         }
     }
@@ -419,18 +425,35 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
         entity.discard();
     }
 
-    public LevelChunk ensureLoaded(ServerLevel nmsWorld, int chunkX, int chunkZ) {
+    public CompletableFuture<LevelChunk> ensureLoaded(ServerLevel nmsWorld, int chunkX, int chunkZ) {
         return PaperweightPlatformAdapter.ensureLoaded(nmsWorld, chunkX, chunkZ);
     }
 
     @Override
     @SuppressWarnings("rawtypes")
-    public synchronized <T extends Future<T>> T call(IChunkSet set, Runnable finalizer) {
+    public synchronized <T extends Future<T>> T call(IQueueExtent<? extends IChunk> owner, IChunkSet set, Runnable finalizer) {
         if (!callLock.isHeldByCurrentThread()) {
             throw new IllegalStateException("Attempted to call chunk GET but chunk was not call-locked.");
         }
         forceLoadSections = false;
-        LevelChunk nmsChunk = ensureLoaded(serverLevel, chunkX, chunkZ);
+        final ServerLevel nmsWorld = serverLevel;
+        CompletableFuture<LevelChunk> nmsChunkFuture = ensureLoaded(nmsWorld, chunkX, chunkZ);
+        LevelChunk chunk = nmsChunkFuture.getNow(null);
+        // Run immediately if possible
+        if (chunk != null) {
+            return internalCall(set, finalizer, chunk, nmsWorld);
+        }
+        nmsChunkFuture.thenApply(nmsChunk -> owner.submitTaskUnchecked(() -> (T) internalCall(
+                set,
+                finalizer,
+                nmsChunk,
+                nmsWorld
+        )));
+        return (T) (Future) CompletableFuture.completedFuture(null);
+    }
+
+    private <T extends Future<T>> T internalCall(IChunkSet set, Runnable finalizer, LevelChunk nmsChunk, ServerLevel nmsWorld) {
+        try {
             PaperweightGetBlocks_Copy copy = createCopy ? new PaperweightGetBlocks_Copy(nmsChunk) : null;
             if (createCopy) {
                 if (copies.containsKey(copyKey)) {
@@ -438,7 +461,6 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
                 }
                 copies.put(copyKey, copy);
             }
-        try {
             // Remove existing tiles. Create a copy so that we can remove blocks
             Map<BlockPos, BlockEntity> chunkTiles = new HashMap<>(nmsChunk.getBlockEntities());
             List<BlockEntity> beacons = null;
@@ -510,7 +532,7 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
                                             biomeData
                                     );
                                     if (PaperweightPlatformAdapter.setSectionAtomic(
-                                            serverLevel.getWorld().getName(),
+                                            nmsWorld.getWorld().getName(),
                                             chunkPos,
                                             levelChunkSections,
                                             null,
@@ -586,7 +608,7 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
                                     biomeData
                             );
                             if (PaperweightPlatformAdapter.setSectionAtomic(
-                                    serverLevel.getWorld().getName(),
+                                    nmsWorld.getWorld().getName(),
                                     chunkPos,
                                     levelChunkSections,
                                     null,
@@ -650,7 +672,7 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
                                     biomeData != null ? biomeData : (PalettedContainer<Holder<Biome>>) existingSection.getBiomes()
                             );
                             if (!PaperweightPlatformAdapter.setSectionAtomic(
-                                    serverLevel.getWorld().getName(),
+                                    nmsWorld.getWorld().getName(),
                                     chunkPos,
                                     levelChunkSections,
                                     existingSection,
@@ -725,7 +747,7 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
                         }
                         if (Settings.settings().EXPERIMENTAL.REMOVE_ENTITY_FROM_WORLD_ON_CHUNK_FAIL) {
                             for (UUID uuid : entityRemoves) {
-                                Entity entity = serverLevel.getEntities().get(uuid);
+                                Entity entity = nmsWorld.getEntities().get(uuid);
                                 if (entity != null) {
                                     removeEntity(entity);
                                 }
@@ -764,7 +786,7 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
 
                             EntityType<?> type = EntityType.byString(id).orElse(null);
                             if (type != null) {
-                                Entity entity = type.create(serverLevel);
+                                Entity entity = type.create(nmsWorld);
                                 if (entity != null) {
                                     final CompoundTag tag = (CompoundTag) adapter.fromNativeLin(linTag);
                                     for (final String name : Constants.NO_COPY_ENTITY_NBT_FIELDS) {
@@ -773,11 +795,11 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
                                     entity.load(tag);
                                     entity.absMoveTo(x, y, z, yaw, pitch);
                                     entity.setUUID(NbtUtils.uuid(nativeTag));
-                                    if (!serverLevel.addFreshEntity(entity, CreatureSpawnEvent.SpawnReason.CUSTOM)) {
+                                    if (!nmsWorld.addFreshEntity(entity, CreatureSpawnEvent.SpawnReason.CUSTOM)) {
                                         LOGGER.warn(
                                                 "Error creating entity of type `{}` in world `{}` at location `{},{},{}`",
                                                 id,
-                                                serverLevel.getWorld().getName(),
+                                                nmsWorld.getWorld().getName(),
                                                 x,
                                                 y,
                                                 z
@@ -807,11 +829,11 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
                             final int z = blockHash.z() + bz;
                             final BlockPos pos = new BlockPos(x, y, z);
 
-                            synchronized (serverLevel) {
+                            synchronized (nmsWorld) {
-                                BlockEntity tileEntity = serverLevel.getBlockEntity(pos);
+                                BlockEntity tileEntity = nmsWorld.getBlockEntity(pos);
                                 if (tileEntity == null || tileEntity.isRemoved()) {
-                                    serverLevel.removeBlockEntity(pos);
+                                    nmsWorld.removeBlockEntity(pos);
-                                    tileEntity = serverLevel.getBlockEntity(pos);
+                                    tileEntity = nmsWorld.getBlockEntity(pos);
                                 }
                                 if (tileEntity != null) {
                                     final CompoundTag tag = (CompoundTag) adapter.fromNativeLin(nativeTag.linTag());
@@ -866,7 +888,7 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
                                 return queueHandler.async(callback, null);
                             }
                         } catch (Throwable e) {
-                            e.printStackTrace();
+                            LOGGER.error("Error performing final chunk calling at {},{}", chunkX, chunkZ, e);
                             throw e;
                         }
                     };
@@ -884,7 +906,7 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
             }
             return null;
         } catch (Throwable e) {
-            e.printStackTrace();
+            LOGGER.error("Error calling chunk at {},{}", chunkX, chunkZ, e);
             return null;
         } finally {
             forceLoadSections = true;
@@ -1029,7 +1051,7 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
                 }
                 return data;
             } catch (IllegalAccessException | InterruptedException e) {
-                e.printStackTrace();
+                LOGGER.error("Could not read block data from palette", e);
                 throw new RuntimeException(e);
             } finally {
                 lock.release();
@@ -1071,7 +1093,16 @@ public class PaperweightGetBlocks extends CharGetBlocks implements BukkitGetBloc
             synchronized (this) {
                 levelChunk = this.levelChunk;
                 if (levelChunk == null) {
-                    this.levelChunk = levelChunk = ensureLoaded(this.serverLevel, chunkX, chunkZ);
+                    try {
+                        this.levelChunk = levelChunk = ensureLoaded(this.serverLevel, chunkX, chunkZ).get();
+                    } catch (InterruptedException | ExecutionException e) {
+                        LOGGER.error("Could not get chunk at {},{}", chunkX, chunkZ, e);
+                        throw new FaweException(
+                                TextComponent.of("Could not get chunk at " + chunkX + "," + chunkZ + ": " + e.getMessage()),
+                                FaweException.Type.OTHER,
+                                false
+                        );
+                    }
                 }
             }
         }

worldedit-bukkit/adapters/adapter-1_21/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_21_R1/PaperweightGetBlocks_Copy.java

@@ -3,8 +3,10 @@ package com.sk89q.worldedit.bukkit.adapter.impl.fawe.v1_21_R1;
 import com.fastasyncworldedit.core.extent.processor.heightmap.HeightMapType;
 import com.fastasyncworldedit.core.nbt.FaweCompoundTag;
 import com.fastasyncworldedit.core.queue.IBlocks;
+import com.fastasyncworldedit.core.queue.IChunk;
 import com.fastasyncworldedit.core.queue.IChunkGet;
 import com.fastasyncworldedit.core.queue.IChunkSet;
+import com.fastasyncworldedit.core.queue.IQueueExtent;
 import com.fastasyncworldedit.core.util.NbtUtils;
 import com.sk89q.worldedit.bukkit.WorldEditPlugin;
 import com.sk89q.worldedit.bukkit.adapter.BukkitImplAdapter;
@@ -257,7 +259,7 @@ public class PaperweightGetBlocks_Copy implements IChunkGet {
     }
 
     @Override
-    public <T extends Future<T>> T call(IChunkSet set, Runnable finalize) {
+    public <T extends Future<T>> T call(IQueueExtent<? extends IChunk> owner, IChunkSet set, Runnable finalize) {
         return null;
     }
 

worldedit-bukkit/adapters/adapter-1_21/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_21_R1/PaperweightPlatformAdapter.java

@@ -78,6 +78,8 @@ import java.util.List;
 import java.util.Map;
 import java.util.Optional;
 import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Future;
 import java.util.concurrent.Semaphore;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
@@ -265,7 +267,43 @@ public final class PaperweightPlatformAdapter extends NMSAdapter {
         }
     }
 
-    public static LevelChunk ensureLoaded(ServerLevel serverLevel, int chunkX, int chunkZ) {
+    public static CompletableFuture<LevelChunk> ensureLoaded(ServerLevel serverLevel, int chunkX, int chunkZ) {
+        LevelChunk levelChunk = getChunkImmediatelyAsync(serverLevel, chunkX, chunkZ);
+        if (levelChunk != null) {
+            return CompletableFuture.completedFuture(levelChunk);
+        }
+        if (PaperLib.isPaper()) {
+            CompletableFuture<LevelChunk> future = serverLevel
+                    .getWorld()
+                    .getChunkAtAsync(chunkX, chunkZ, true, true)
+                    .thenApply(chunk -> {
+                        addTicket(serverLevel, chunkX, chunkZ);
+                        try {
+                            return (LevelChunk) CRAFT_CHUNK_GET_HANDLE.invoke(chunk);
+                        } catch (Throwable e) {
+                            LOGGER.error("Could not asynchronously load chunk at {},{}", chunkX, chunkZ, e);
+                            return null;
+                        }
+                    });
+            try {
+                if (!future.isCompletedExceptionally() || (future.isDone() && future.get() != null)) {
+                    return future;
+                }
+                Throwable t = future.exceptionNow();
+                LOGGER.error("Asynchronous chunk load at {},{} exceptionally completed immediately", chunkX, chunkZ, t);
+            } catch (InterruptedException | ExecutionException e) {
+                LOGGER.error(
+                        "Unexpected error when getting completed future at chunk {},{}. Returning to default.",
+                        chunkX,
+                        chunkZ,
+                        e
+                );
+            }
+        }
+        return CompletableFuture.supplyAsync(() -> TaskManager.taskManager().sync(() -> serverLevel.getChunk(chunkX, chunkZ)));
+    }
+
+    public static @Nullable LevelChunk getChunkImmediatelyAsync(ServerLevel serverLevel, int chunkX, int chunkZ) {
         if (!PaperLib.isPaper()) {
             LevelChunk nmsChunk = serverLevel.getChunkSource().getChunk(chunkX, chunkZ, false);
             if (nmsChunk != null) {
@@ -274,6 +312,7 @@ public final class PaperweightPlatformAdapter extends NMSAdapter {
             if (Fawe.isMainThread()) {
                 return serverLevel.getChunk(chunkX, chunkZ);
             }
+            return null;
         } else {
             LevelChunk nmsChunk = serverLevel.getChunkSource().getChunkAtIfCachedImmediately(chunkX, chunkZ);
             if (nmsChunk != null) {
@@ -289,31 +328,9 @@ public final class PaperweightPlatformAdapter extends NMSAdapter {
             if (Fawe.isMainThread()) {
                 return serverLevel.getChunk(chunkX, chunkZ);
             }
-            CompletableFuture<org.bukkit.Chunk> future = serverLevel.getWorld().getChunkAtAsync(chunkX, chunkZ, true, true);
+            return null;
-            try {
-                CraftChunk chunk;
-                try {
-                    chunk = (CraftChunk) future.get(10, TimeUnit.SECONDS);
-                } catch (TimeoutException e) {
-                    String world = serverLevel.getWorld().getName();
-                    // We've already taken 10 seconds we can afford to wait a little here.
-                    boolean loaded = TaskManager.taskManager().sync(() -> Bukkit.getWorld(world) != null);
-                    if (loaded) {
-                        LOGGER.warn("Chunk {},{} failed to load in 10 seconds in world {}. Retrying...", chunkX, chunkZ, world);
-                        // Retry chunk load
-                        chunk = (CraftChunk) serverLevel.getWorld().getChunkAtAsync(chunkX, chunkZ, true, true).get();
-                    } else {
-                        throw new UnsupportedOperationException("Cannot load chunk from unloaded world " + world + "!");
         }
     }
-                addTicket(serverLevel, chunkX, chunkZ);
-                return (LevelChunk) CRAFT_CHUNK_GET_HANDLE.invoke(chunk);
-            } catch (Throwable e) {
-                e.printStackTrace();
-            }
-        }
-        return TaskManager.taskManager().sync(() -> serverLevel.getChunk(chunkX, chunkZ));
-    }
 
     private static void addTicket(ServerLevel serverLevel, int chunkX, int chunkZ) {
         // Ensure chunk is definitely loaded before applying a ticket

worldedit-core/src/main/java/com/fastasyncworldedit/core/FaweCache.java

@@ -50,6 +50,7 @@ import java.util.concurrent.ArrayBlockingQueue;
 import java.util.concurrent.CancellationException;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Future;
+import java.util.concurrent.LinkedBlockingQueue;
 import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
@@ -645,7 +646,7 @@ public enum FaweCache implements Trimable {
      */
     public ThreadPoolExecutor newBlockingExecutor(String name, Logger logger) {
         int nThreads = Settings.settings().QUEUE.PARALLEL_THREADS;
-        ArrayBlockingQueue<Runnable> queue = new ArrayBlockingQueue<>(nThreads, true);
+        LinkedBlockingQueue<Runnable> queue = new LinkedBlockingQueue<>();
         return new ThreadPoolExecutor(nThreads, nThreads,
                 0L, TimeUnit.MILLISECONDS, queue,
                 new ThreadFactoryBuilder().setNameFormat(name).build(),

worldedit-core/src/main/java/com/fastasyncworldedit/core/queue/IBatchProcessor.java

@@ -10,6 +10,7 @@ import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.world.block.BlockTypesCache;
 
 import javax.annotation.Nullable;
+import java.util.Arrays;
 import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.CompletableFuture;
@@ -127,9 +128,7 @@ public interface IBatchProcessor {
                 char[] arr = set.loadIfPresent(layer);
                 if (arr != null) {
                     int index = (minY & 15) << 8;
-                    for (int i = index; i < 4096; i++) {
+                    Arrays.fill(arr, index, 4096, (char) BlockTypesCache.ReservedIDs.__RESERVED__);
-                        arr[i] = BlockTypesCache.ReservedIDs.__RESERVED__;
-                    }
                 }
                 set.setBlocks(layer, arr);
             } else if (layer == maxLayer) {

worldedit-core/src/main/java/com/fastasyncworldedit/core/queue/IChunkGet.java

@@ -45,7 +45,7 @@ public interface IChunkGet extends IBlocks, Trimable, InputExtent, ITileInput {
 
     }
 
-    <T extends Future<T>> T call(IChunkSet set, Runnable finalize);
+    <T extends Future<T>> T call(IQueueExtent<? extends IChunk> owner, IChunkSet set, Runnable finalize);
 
     @Deprecated(forRemoval = true, since = "2.11.2")
     default CompoundTag getEntity(UUID uuid) {
@@ -81,7 +81,7 @@ public interface IChunkGet extends IBlocks, Trimable, InputExtent, ITileInput {
     }
 
     /**
-     * Lock the {@link IChunkGet#call(IChunkSet, Runnable)} method to the current thread using a reentrant lock. Also locks
+     * Lock the {@link IChunkGet#call(IQueueExtent, IChunkSet, Runnable)} method to the current thread using a reentrant lock. Also locks
      * related methods e.g. {@link IChunkGet#setCreateCopy(boolean)}
      *
      * @since 2.8.2
@@ -89,7 +89,7 @@ public interface IChunkGet extends IBlocks, Trimable, InputExtent, ITileInput {
     default void lockCall() {}
 
     /**
-     * Unlock {@link IChunkGet#call(IChunkSet, Runnable)} (and other related methods) to executions from other threads
+     * Unlock {@link IChunkGet#call(IQueueExtent, IChunkSet, Runnable)} (and other related methods) to executions from other threads
      *
      * @since 2.8.2
      */

worldedit-core/src/main/java/com/fastasyncworldedit/core/queue/IQueueExtent.java

@@ -10,10 +10,12 @@ import com.sk89q.worldedit.function.operation.Operation;
 import com.sk89q.worldedit.math.BlockVector2;
 import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.regions.Region;
+import org.jetbrains.annotations.ApiStatus;
 
 import javax.annotation.Nullable;
 import java.io.Flushable;
 import java.util.Set;
+import java.util.concurrent.Callable;
 import java.util.concurrent.Future;
 
 /**
@@ -61,7 +63,7 @@ public interface IQueueExtent<T extends IChunk> extends Flushable, Trimable, ICh
     IChunkSet getCachedSet(int chunkX, int chunkZ);
 
     /**
-     * Submit the chunk so that it's changes are applied to the world
+     * Submit the chunk so that its changes are applied to the world
      *
      * @return Future
      */
@@ -81,6 +83,12 @@ public interface IQueueExtent<T extends IChunk> extends Flushable, Trimable, ICh
 
     boolean isFastMode();
 
+    /**
+     * Submit a task to the extent to be queued as if it were a chunk
+     */
+    @ApiStatus.Internal
+    <V extends Future<V>> V submitTaskUnchecked(Callable<V> callable);
+
     /**
      * Create a new root IChunk object. Full chunks will be reused, so a more optimized chunk can be
      * returned in that case.

worldedit-core/src/main/java/com/fastasyncworldedit/core/queue/implementation/ParallelQueueExtent.java

@@ -149,6 +149,8 @@ public class ParallelQueueExtent extends PassthroughExtent {
                     final SingleThreadQueueExtent queue = (SingleThreadQueueExtent) getNewQueue();
                     queue.setFastMode(fastmode);
                     queue.setFaweExceptionArray(faweExceptionReasonsUsed);
+                    int div = ((size + 1) * 3) >> 1; // Allow each thread to use 1.5x TARGET_SIZE / PARALLEL_THREADS
+                    queue.setTargetSize(Settings.settings().QUEUE.TARGET_SIZE / div);
                     enter(queue);
                     synchronized (queue) {
                         try {

worldedit-core/src/main/java/com/fastasyncworldedit/core/queue/implementation/QueueHandler.java

@@ -18,6 +18,7 @@ import com.fastasyncworldedit.core.util.task.FaweForkJoinWorkerThreadFactory;
 import com.fastasyncworldedit.core.wrappers.WorldWrapper;
 import com.google.common.util.concurrent.Futures;
 import com.sk89q.worldedit.world.World;
+import org.jetbrains.annotations.ApiStatus;
 
 import java.lang.ref.WeakReference;
 import java.util.HashMap;
@@ -41,14 +42,12 @@ import java.util.function.Supplier;
 @SuppressWarnings({"unchecked", "rawtypes"})
 public abstract class QueueHandler implements Trimable, Runnable {
 
-    private static final int PROCESSORS = Runtime.getRuntime().availableProcessors();
-
     /**
      * Primary queue should be used for tasks that are unlikely to wait on other tasks, IO, etc. (i.e. spend most of their
      * time utilising CPU.
      */
     private final ForkJoinPool forkJoinPoolPrimary = new ForkJoinPool(
-            PROCESSORS,
+            Settings.settings().QUEUE.PARALLEL_THREADS,
             new FaweForkJoinWorkerThreadFactory("FAWE Fork Join Pool Primary - %s"),
             null,
             false
@@ -59,7 +58,7 @@ public abstract class QueueHandler implements Trimable, Runnable {
      * primary queue. They may be IO-bound tasks.
      */
     private final ForkJoinPool forkJoinPoolSecondary = new ForkJoinPool(
-            PROCESSORS,
+            Settings.settings().QUEUE.PARALLEL_THREADS,
             new FaweForkJoinWorkerThreadFactory("FAWE Fork Join Pool Secondary - %s"),
             null,
             false
@@ -93,6 +92,11 @@ public abstract class QueueHandler implements Trimable, Runnable {
         TaskManager.taskManager().repeat(this, 1);
     }
 
+    @ApiStatus.Internal
+    public ThreadPoolExecutor getBlockingExecutor() {
+        return blockingExecutor;
+    }
+
     @Override
     public void run() {
         if (!Fawe.isMainThread()) {
@@ -380,6 +384,11 @@ public abstract class QueueHandler implements Trimable, Runnable {
         return (T) blockingExecutor.submit(chunk);
     }
 
+    @ApiStatus.Internal
+    public <T extends Future<T>> T submitToBlocking(Callable<T> callable) {
+        return (T) blockingExecutor.submit(callable);
+    }
+
     /**
      * Get or create the WorldChunkCache for a world
      */

worldedit-core/src/main/java/com/fastasyncworldedit/core/queue/implementation/SingleThreadQueueExtent.java

@@ -31,6 +31,7 @@ import com.sk89q.worldedit.world.World;
 import it.unimi.dsi.fastutil.longs.Long2ObjectLinkedOpenHashMap;
 import org.apache.logging.log4j.Logger;
 
+import java.util.concurrent.Callable;
 import java.util.concurrent.ConcurrentLinkedQueue;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Future;
@@ -68,6 +69,7 @@ public class SingleThreadQueueExtent extends ExtentBatchProcessorHolder implemen
     private boolean[] faweExceptionReasonsUsed = new boolean[FaweException.Type.values().length];
     private int lastException = Integer.MIN_VALUE;
     private int exceptionCount = 0;
+    private int targetSize = Settings.settings().QUEUE.TARGET_SIZE;
 
     public SingleThreadQueueExtent() {
     }
@@ -120,6 +122,10 @@ public class SingleThreadQueueExtent extends ExtentBatchProcessorHolder implemen
         return maxY;
     }
 
+    public void setTargetSize(int targetSize) {
+        this.targetSize = targetSize;
+    }
+
     /**
      * Sets the cached boolean array of length {@code FaweException.Type.values().length} that determines if a thrown
      * {@link FaweException} of type {@link FaweException.Type} should be output to console, rethrown to attempt to be visible
@@ -154,6 +160,7 @@ public class SingleThreadQueueExtent extends ExtentBatchProcessorHolder implemen
         this.setPostProcessor(EmptyBatchProcessor.getInstance());
         this.world = null;
         this.faweExceptionReasonsUsed = new boolean[FaweException.Type.values().length];
+        this.targetSize = Settings.settings().QUEUE.TARGET_SIZE;
     }
 
     /**
@@ -246,6 +253,13 @@ public class SingleThreadQueueExtent extends ExtentBatchProcessorHolder implemen
         return (V) Fawe.instance().getQueueHandler().submit(chunk);
     }
 
+    @Override
+    public <V extends Future<V>> V submitTaskUnchecked(Callable<V> callable) {
+        V future = (V) Fawe.instance().getQueueHandler().submitToBlocking(callable);
+        submissions.add(future);
+        return future;
+    }
+
     @Override
     public synchronized boolean trim(boolean aggressive) {
         cacheGet.trim(aggressive);
@@ -308,7 +322,7 @@ public class SingleThreadQueueExtent extends ExtentBatchProcessorHolder implemen
             // If queueing is enabled AND either of the following
             //  - memory is low & queue size > num threads + 8
             //  - queue size > target size and primary queue has less than num threads submissions
-            int targetSize = lowMem ? Settings.settings().QUEUE.PARALLEL_THREADS + 8 : Settings.settings().QUEUE.TARGET_SIZE;
+            int targetSize = lowMem ? Settings.settings().QUEUE.PARALLEL_THREADS + 8 : this.targetSize;
             if (enabledQueue && size > targetSize && (lowMem || Fawe.instance().getQueueHandler().isUnderutilized())) {
                 chunk = chunks.removeFirst();
                 final Future future = submitUnchecked(chunk);

worldedit-core/src/main/java/com/fastasyncworldedit/core/queue/implementation/blocks/CharBlocks.java

@@ -9,6 +9,8 @@ import com.sk89q.worldedit.world.block.BlockTypesCache;
 import org.apache.logging.log4j.Logger;
 
 import javax.annotation.Nullable;
+import java.lang.invoke.VarHandle;
+import java.util.Arrays;
 
 public abstract class CharBlocks implements IBlocks {
 
@@ -20,7 +22,10 @@ public abstract class CharBlocks implements IBlocks {
             char[] arr = blocks.blocks[layer];
             if (arr == null) {
                 // Chunk probably trimmed mid-operations, but do nothing about it to avoid other issues
-                return EMPTY.get(blocks, layer, false);
+                synchronized (blocks.sectionLocks[layer]) {
+                    LOGGER.warn("Unexpected null section, please report this occurence alongside a debugpaste.");
+                    return getSkipFull(blocks, layer, false);
+                }
             }
             return arr;
         }
@@ -32,6 +37,7 @@ public abstract class CharBlocks implements IBlocks {
             if (arr == null) {
                 // Chunk probably trimmed mid-operations, but do nothing about it to avoid other issues
                 synchronized (blocks.sectionLocks[layer]) {
+                    LOGGER.warn("Unexpected null section, please report this occurence alongside a debugpaste.");
                     return getSkipFull(blocks, layer, aggressive);
                 }
             }
@@ -118,6 +124,7 @@ public abstract class CharBlocks implements IBlocks {
     public synchronized IChunkSet reset() {
         for (int i = 0; i < sectionCount; i++) {
             sections[i] = EMPTY;
+            VarHandle.storeStoreFence();
             blocks[i] = null;
         }
         return null;
@@ -134,9 +141,7 @@ public abstract class CharBlocks implements IBlocks {
         if (data == null) {
             return new char[4096];
         }
-        for (int i = 0; i < 4096; i++) {
+        Arrays.fill(data, defaultOrdinal());
-            data[i] = defaultOrdinal();
-        }
         return data;
     }
 

worldedit-core/src/main/java/com/fastasyncworldedit/core/queue/implementation/blocks/NullChunkGet.java

@@ -4,8 +4,10 @@ import com.fastasyncworldedit.core.FaweCache;
 import com.fastasyncworldedit.core.extent.processor.heightmap.HeightMapType;
 import com.fastasyncworldedit.core.nbt.FaweCompoundTag;
 import com.fastasyncworldedit.core.queue.IBlocks;
+import com.fastasyncworldedit.core.queue.IChunk;
 import com.fastasyncworldedit.core.queue.IChunkGet;
 import com.fastasyncworldedit.core.queue.IChunkSet;
+import com.fastasyncworldedit.core.queue.IQueueExtent;
 import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.world.biome.BiomeType;
 import com.sk89q.worldedit.world.biome.BiomeTypes;
@@ -114,7 +116,7 @@ public final class NullChunkGet implements IChunkGet {
     }
 
     @Nullable
-    public <T extends Future<T>> T call(@Nonnull IChunkSet set, @Nonnull Runnable finalize) {
+    public <T extends Future<T>> T call(IQueueExtent<? extends IChunk> owner, @Nonnull IChunkSet set, @Nonnull Runnable finalize) {
         return null;
     }
 

worldedit-core/src/main/java/com/fastasyncworldedit/core/queue/implementation/chunk/ChunkHolder.java

@@ -987,7 +987,8 @@ public class ChunkHolder<T extends Future<T>> implements IQueueChunk<T> {
         if (chunkSet != null && !chunkSet.isEmpty()) {
             chunkSet.setBitMask(bitMask);
             IChunkSet copy = chunkSet.createCopy();
-            return this.call(copy, () -> {
+
+            return this.call(extent, copy, () -> {
                 // Do nothing
             });
         }
@@ -997,8 +998,9 @@ public class ChunkHolder<T extends Future<T>> implements IQueueChunk<T> {
     /**
      * This method should never be called from outside ChunkHolder
      */
+
     @Override
-    public synchronized T call(IChunkSet set, Runnable finalize) {
+    public <U extends Future<U>> U call(IQueueExtent<? extends IChunk> owner, IChunkSet set, Runnable finalize) {
         if (set != null) {
             IChunkGet get = getOrCreateGet();
             try {
@@ -1016,7 +1018,7 @@ public class ChunkHolder<T extends Future<T>> implements IQueueChunk<T> {
                 } else {
                     finalizer = finalize;
                 }
-                return get.call(set, finalizer);
+                return get.call(extent, set, finalizer);
             } finally {
                 get.unlockCall();
                 untrackExtent();

worldedit-core/src/main/java/com/fastasyncworldedit/core/queue/implementation/chunk/NullChunk.java

@@ -4,8 +4,10 @@ import com.fastasyncworldedit.core.extent.filter.block.ChunkFilterBlock;
 import com.fastasyncworldedit.core.extent.processor.heightmap.HeightMapType;
 import com.fastasyncworldedit.core.nbt.FaweCompoundTag;
 import com.fastasyncworldedit.core.queue.Filter;
+import com.fastasyncworldedit.core.queue.IChunk;
 import com.fastasyncworldedit.core.queue.IChunkSet;
 import com.fastasyncworldedit.core.queue.IQueueChunk;
+import com.fastasyncworldedit.core.queue.IQueueExtent;
 import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.world.biome.BiomeType;
@@ -225,7 +227,7 @@ public final class NullChunk implements IQueueChunk {
     }
 
     @Nullable
-    public <T extends Future<T>> T call(@Nullable IChunkSet set, @Nullable Runnable finalize) {
+    public <T extends Future<T>> T call(IQueueExtent<? extends IChunk> owner, @Nullable IChunkSet set, @Nullable Runnable finalize) {
         return null;
     }