From 74234cec750427a773cb5bcecbc831f3515c6340 Mon Sep 17 00:00:00 2001
From: Nikita <abracham.mitchell@gmail.com>
Date: Wed, 6 Jan 2016 15:27:59 +0300
Subject: [PATCH] successful promise exception fixed. #302

---
 .../com/corundumstudio/socketio/handler/EncoderHandler.java | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/corundumstudio/socketio/handler/EncoderHandler.java b/src/main/java/com/corundumstudio/socketio/handler/EncoderHandler.java
index 986568a..36bdbe5 100644
--- a/src/main/java/com/corundumstudio/socketio/handler/EncoderHandler.java
+++ b/src/main/java/com/corundumstudio/socketio/handler/EncoderHandler.java
@@ -221,7 +221,11 @@ public class EncoderHandler extends ChannelOutboundHandlerAdapter {
             }
 
             if (out.isReadable()) {
-                ctx.channel().writeAndFlush(res, promise);
+                if (!promise.isDone()) {
+                    ctx.channel().writeAndFlush(res, promise);
+                } else {
+                    ctx.channel().writeAndFlush(res);
+                }
             } else {
                 promise.trySuccess();
                 out.release();