From 8edad673948aeafd78cfbb533f88cce9b822eae6 Mon Sep 17 00:00:00 2001
From: Nassim Jahnke <nassim@njahnke.dev>
Date: Sat, 2 Mar 2024 20:13:58 +0100
Subject: [PATCH] Check if the channel is open in BukkitEncodeHandler

---
 .../viaversion/bukkit/handlers/BukkitEncodeHandler.java        | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/bukkit/src/main/java/com/viaversion/viaversion/bukkit/handlers/BukkitEncodeHandler.java b/bukkit/src/main/java/com/viaversion/viaversion/bukkit/handlers/BukkitEncodeHandler.java
index 7ecfcb2fd..1147ad407 100644
--- a/bukkit/src/main/java/com/viaversion/viaversion/bukkit/handlers/BukkitEncodeHandler.java
+++ b/bukkit/src/main/java/com/viaversion/viaversion/bukkit/handlers/BukkitEncodeHandler.java
@@ -43,7 +43,8 @@ public final class BukkitEncodeHandler extends MessageToMessageEncoder<ByteBuf>
 
     @Override
     protected void encode(final ChannelHandlerContext ctx, final ByteBuf bytebuf, final List<Object> out) throws Exception {
-        if (!connection.checkClientboundPacket()) {
+        // Check if the channel is open as older servers might start sending packets through the pipeline despite the channel being closed
+        if (!connection.checkClientboundPacket() || !ctx.channel().isOpen()) {
             throw CancelEncoderException.generate(null);
         }
         if (!connection.shouldTransformPacket()) {