From b5a4aefe8bc044ba70a39a5a46bf90b08f807a96 Mon Sep 17 00:00:00 2001
From: Matthias Radestock <matthias.radestock@gmail.com>
Date: Thu, 19 Nov 2015 18:28:04 +0000
Subject: [PATCH] never broadcast empty nameserver gossip

---
 nameserver/nameserver.go | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/nameserver/nameserver.go b/nameserver/nameserver.go
index 0d33d184..201bda3b 100644
--- a/nameserver/nameserver.go
+++ b/nameserver/nameserver.go
@@ -74,13 +74,13 @@ func (n *Nameserver) Stop() {
 }
 
 func (n *Nameserver) broadcastEntries(es ...Entry) error {
-	if n.gossip != nil {
-		return n.gossip.GossipBroadcast(&GossipData{
-			Entries:   Entries(es),
-			Timestamp: now(),
-		})
+	if n.gossip == nil || len(es) == 0 {
+		return nil
 	}
-	return nil
+	return n.gossip.GossipBroadcast(&GossipData{
+		Entries:   Entries(es),
+		Timestamp: now(),
+	})
 }
 
 func (n *Nameserver) AddEntry(hostname, containerid string, origin mesh.PeerName, addr address.Address) error {
@@ -133,10 +133,8 @@ func (n *Nameserver) ContainerDied(ident string) {
 		return false
 	})
 	n.Unlock()
-	if len(entries) > 0 {
-		if err := n.broadcastEntries(entries...); err != nil {
-			n.errorf("failed to broadcast container %s death: %v", ident, err)
-		}
+	if err := n.broadcastEntries(entries...); err != nil {
+		n.errorf("failed to broadcast container %s death: %v", ident, err)
 	}
 }