diff --git a/broker/src/main/java/io/moquette/spi/impl/ProtocolProcessor.java b/broker/src/main/java/io/moquette/spi/impl/ProtocolProcessor.java
index 3c9560dc..c3b0b32d 100755
--- a/broker/src/main/java/io/moquette/spi/impl/ProtocolProcessor.java
+++ b/broker/src/main/java/io/moquette/spi/impl/ProtocolProcessor.java
@@ -284,6 +284,7 @@ public class ProtocolProcessor {
                 }
 
                 if (session.getDeleted() != 0) {
+                    LOG.error("user {} session {} is deleted. login failure", msg.payload().userName(), clientId);
                     return false;
                 }