diff --git a/patches/systemvm/debian/config/root/edithosts.sh b/patches/systemvm/debian/config/root/edithosts.sh
index 478ce4ba552..506c5e68b48 100755
--- a/patches/systemvm/debian/config/root/edithosts.sh
+++ b/patches/systemvm/debian/config/root/edithosts.sh
@@ -67,6 +67,33 @@ sed -i  /"$2 "/d /etc/hosts
 sed -i  /"$3"/d /etc/hosts
 echo "$2 $3" >> /etc/hosts
 
+locked=0
+if [ $no_redundant -eq 0 ]
+then
+#for redundant router, grap the lock to prevent racy with keepalived process
+LOCK=/tmp/rrouter.lock
+
+# Wait the lock
+for i in `seq 1 5`
+do
+    if [ ! -e $LOCK ]
+    then
+        touch $LOCK
+        locked=1
+        break
+    fi
+    sleep 1
+    logger -t cloud "edithosts: sleep 1 second wait for the redundant router lock"
+done
+
+if [ $locked -eq 0 ]
+then
+    logger -t cloud "edithosts: fail to get the redundant router lock"
+    logger -t cloud "edithosts: keepalived should able to handle the dnsmasq restart"
+    exit
+fi
+fi
+
 # make dnsmasq re-read files
 pid=$(pidof dnsmasq)
 if [ "$pid" != "" ]
@@ -81,4 +108,10 @@ else
   fi
 fi
 
-exit $?
+ret=$?
+if [ $locked -eq 1 ]
+then
+	rm $LOCK
+fi
+
+exit $ret