From 12aa3036f537d04ffd8d8630dc42876677100337 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn=20Kornefalk?= <bjorn.kornefalk@gi-de.com>
Date: Wed, 4 Oct 2017 09:50:31 +0200
Subject: [PATCH] [#15] Writing data on closed socket causes unnecessary
 exception in Netty

---
 .gitignore                                                   | 2 +-
 .../java/com/cloudhopper/smpp/impl/DefaultSmppSession.java   | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/.gitignore b/.gitignore
index 7f275add..4f9ff8db 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,4 +3,4 @@ target/
 .classpath
 .project
 .settings/
-
+.idea/
diff --git a/src/main/java/com/cloudhopper/smpp/impl/DefaultSmppSession.java b/src/main/java/com/cloudhopper/smpp/impl/DefaultSmppSession.java
index 66ff11b7..c400fda5 100644
--- a/src/main/java/com/cloudhopper/smpp/impl/DefaultSmppSession.java
+++ b/src/main/java/com/cloudhopper/smpp/impl/DefaultSmppSession.java
@@ -516,6 +516,11 @@ public WindowFuture<Integer,PduRequest,PduResponse> sendRequestPdu(PduRequest pd
             }
         }
 
+        if (!this.channel.isOpen()) {
+            logger.info("Channel closed.");
+            return;
+        }
+
         // we need to log the PDU after encoding since some things only happen
         // during the encoding process such as looking up the result message
         if (configuration.getLoggingOptions().isLogPduEnabled()) {