From a60fda7df45f03c703d269677dc8aaaabdc2bd4e Mon Sep 17 00:00:00 2001
From: Holger Weiss <holger@zedat.fu-berlin.de>
Date: Fri, 9 May 2014 17:54:12 +0200
Subject: [PATCH] XEP-0198: Don't warn on invalid ACK elements

Do not log a warning (but only a debug message) if the client sends an
invalid </a> packet.  Some clients do that occasionally, and there's
nothing server admininistrators could do about that.
---
 src/ejabberd_c2s.erl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/ejabberd_c2s.erl b/src/ejabberd_c2s.erl
index 8874c48ad..5fb81d1f5 100644
--- a/src/ejabberd_c2s.erl
+++ b/src/ejabberd_c2s.erl
@@ -2694,8 +2694,8 @@ handle_a(#state{jid = JID, mgmt_stanzas_out = NumStanzasOut} = StateData,
 		 [jlib:jid_to_string(JID), H, NumStanzasOut]),
 	  mgmt_queue_drop(StateData, H);
       _ ->
-	  ?WARNING_MSG("Ignoring invalid ACK element from ~s",
-		       [jlib:jid_to_string(JID)]),
+	  ?DEBUG("Ignoring invalid ACK element from ~s",
+		 [jlib:jid_to_string(JID)]),
 	  StateData
     end.