//Need to call API to receive all the nodes connected to controller.
List<Node> targetNodes = getAllConnectedNodes();
+
+ if(targetNodes == null)
+ return;
for (Node targetNode : targetNodes){
spLogger.info("Send request for stats collection to node : {})",targetNode.getId());
private List<Node> getAllConnectedNodes(){
Nodes nodes = (Nodes) dps.readOperationalData(nodesIdentifier);
+ if(nodes == null)
+ return null;
+
spLogger.info("Number of connected nodes : {}",nodes.getNode().size());
return nodes.getNode();
}