import java.net.InetAddress;
import java.util.ArrayList;
+import java.util.Collections;
import java.util.EnumSet;
import java.util.HashSet;
import java.util.Iterator;
public Set<InetAddress> getControllers(Node node) {
if (nodeConnections != null) return nodeConnections.get(node);
- return null;
+ return Collections.emptySet();
}
public ConcurrentMap<Node, Set<InetAddress>> getNodeConnections() {
public Status addNode (Node node, InetAddress controller) {
if (node == null || controller == null) {
+ if (node == null) {
+ log.warn("addNode: node is null");
+ } else if (controller == null) {
+ log.error("Failed to add node {}. The controller address retrieved from clusterServices is null.", node);
+ }
return new Status(StatusCode.BADREQUEST);
}
if (isLocal(node)) {