In short, there isn't actually anything wrong with the async chunk compressor, it just accidentally caused console logging of errors which were previously ignored.

This commit restores that behaviour

You may be asking yourself why we are completely ignoring any errors which come this far down the pipeline.
The answer is quite simple:
Mojang did it
The default Mojang pipeline doesn't have any ChannelOutboundHandlerAdapter or similar instances, and thus nothing to handle exceptionCaught
So when a channel.write() or channel.flush() fails, the error message is actually just passed straight to the future provided.
It is then subsequently discarded, the channel closed, and no one except the user was any the wiser it actually happened!
Unfortunately for us, the default exceptionCaught in this class sends a blaring warning to the server admins indicating that it couldn't send a packet to a disconnected user!
We don't care about these warnings, if we did something wrong to disconnect the user, it is already logged in the proper location, as are broken sockets
tl;dr no need to blare warnings on each write to a broken socket

CraftBukkit

@@ -1 +1 @@
-Subproject commit 88d138fc4387ec938f1041d1c6f75e32267e66ac
+Subproject commit 616c371a77a89e746af16cc29bb5a0a204e70cc4

CraftBukkit-Patches/0105-Implement-Threaded-Bulk-Chunk-Compression-and-Cachin.patch

@@ -1,4 +1,4 @@
-From 9cc3d9cf3540af0ac2e95217a151fe19d381f9f9 Mon Sep 17 00:00:00 2001
+From cf130aa4f7b9f3dae460f43d761870222b408fcd Mon Sep 17 00:00:00 2001
 From: md_5 <git@md-5.net>
 Date: Tue, 28 Jan 2014 20:32:07 +1100
 Subject: [PATCH] Implement Threaded Bulk Chunk Compression and Caching
@@ -17,7 +17,7 @@ index 9b853a9..a4c8843 100644
                  Iterator iterator2 = arraylist1.iterator();
  
 diff --git a/src/main/java/net/minecraft/server/PacketPlayOutMapChunkBulk.java b/src/main/java/net/minecraft/server/PacketPlayOutMapChunkBulk.java
-index 30bf8a7..c40cf30 100644
+index fc92026..484d727 100644
 --- a/src/main/java/net/minecraft/server/PacketPlayOutMapChunkBulk.java
 +++ b/src/main/java/net/minecraft/server/PacketPlayOutMapChunkBulk.java
 @@ -12,9 +12,9 @@ public class PacketPlayOutMapChunkBulk extends Packet {
@@ -106,10 +106,10 @@ index fb95be4..a382235 100644
          ServerConnection.a(this.a).add(networkmanager);
 diff --git a/src/main/java/org/spigotmc/ChunkCompressor.java b/src/main/java/org/spigotmc/ChunkCompressor.java
 new file mode 100644
-index 0000000..f82a26d
+index 0000000..78560c6
 --- /dev/null
 +++ b/src/main/java/org/spigotmc/ChunkCompressor.java
-@@ -0,0 +1,70 @@
+@@ -0,0 +1,87 @@
 +package org.spigotmc;
 +
 +import java.util.Arrays;
@@ -179,9 +179,26 @@ index 0000000..f82a26d
 +
 +        super.write( ctx, msg, promise );
 +    }
++
++    @Override
++    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception
++    {
++        // In short, there isn't actually anything wrong with the async chunk compressor, it just accidentally caused console logging of errors which were previously ignored.\
++        // This commit restores that behaviour
++
++        // You may be asking yourself why we are completely ignoring any errors which come this far down the pipeline.
++        // The answer is quite simple:
++        // Mojang did it
++        // The default Mojang pipeline doesn't have any ChannelOutboundHandlerAdapter or similar instances, and thus nothing to handle exceptionCaught
++        // So when a channel.write() or channel.flush() fails, the error message is actually just passed straight to the future provided.
++        // It is then subsequently discarded, the channel closed, and no one except the user was any the wiser it actually happened!
++        // Unfortunately for us, the default exceptionCaught in this class sends a blaring warning to the server admins indicating that it couldn't send a packet to a disconnected user!
++        // We don't care about these warnings, if we did something wrong to disconnect the user, it is already logged in the proper location, as are broken sockets
++        // tl;dr no need to blare warnings on each write to a broken socket
++    }
 +}
 diff --git a/src/main/java/org/spigotmc/SpigotConfig.java b/src/main/java/org/spigotmc/SpigotConfig.java
-index 552266b..6c6e6b0 100755
+index 769ef2a..fb944e7 100755
 --- a/src/main/java/org/spigotmc/SpigotConfig.java
 +++ b/src/main/java/org/spigotmc/SpigotConfig.java
 @@ -266,4 +266,16 @@ public class SpigotConfig