diff --git a/parser/src/main/java/org/dna/mqtt/moquette/server/MQTTHandler.java b/parser/src/main/java/org/dna/mqtt/moquette/server/MQTTHandler.java
index 6bed0d07..c1736382 100644
--- a/parser/src/main/java/org/dna/mqtt/moquette/server/MQTTHandler.java
+++ b/parser/src/main/java/org/dna/mqtt/moquette/server/MQTTHandler.java
@@ -228,6 +228,7 @@ public class MQTTHandler extends IoHandlerAdapter implements INotifier {
         pubMessage.setPayload(payload);
         assert m_clientIDs != null;
         assert m_clientIDs.get(clientId) != null;
+        LOG.debug("Session for clientId " + clientId + " is " + m_clientIDs.get(clientId).getSession());
         m_clientIDs.get(clientId).getSession().write(pubMessage);
     }
 }