diff --git a/xCAT-server/lib/xcat/plugins/nodediscover.pm b/xCAT-server/lib/xcat/plugins/nodediscover.pm
index a05a1f598..9c6e86314 100644
--- a/xCAT-server/lib/xcat/plugins/nodediscover.pm
+++ b/xCAT-server/lib/xcat/plugins/nodediscover.pm
@@ -510,7 +510,7 @@ sub process_request {
         Timeout  => '1',
         Proto    => 'tcp'
     );
-    unless ($sock) { xCAT::MsgUtils->message("S", "xcat.discovery.nodediscover: Failed to notify $clientip that it's actually $node. $node has not been discovered."); return; }
+    unless ($sock) { xCAT::MsgUtils->message("S", "xcat.discovery.nodediscover: Failed to notify $clientip that it's actually $node. $node has not been discovered: $!"); return; }
     print $sock $restartstring;
     close($sock);