Fixed exception handling to call the exceptionCaught method in the current handler. By default the handler will call ctx.fireExceptionCaught which is what was happening before.

transport/src/main/java/io/netty/channel/ChannelInboundMessageHandlerAdapter.java

@@ -63,7 +63,7 @@ public abstract class ChannelInboundMessageHandlerAdapter<I>
                     }
                     messageReceived(ctx, (I) msg);
                 } catch (Throwable t) {
-                    ctx.fireExceptionCaught(t);
+                    exceptionCaught(ctx, t);
                 }
             }
         } finally {