error fixed

redisson/src/main/java/org/redisson/connection/ServiceManager.java

@@ -306,7 +306,10 @@ public class ServiceManager {
 
     public RedisNodeNotFoundException createNodeNotFoundException(NodeSource source) {
         RedisNodeNotFoundException ex;
-        if (source.getSlot() != null && source.getAddr() == null && source.getRedisClient() == null) {
+        if (cfg.isClusterConfig()
+                && source.getSlot() != null
+                    && source.getAddr() == null
+                        && source.getRedisClient() == null) {
             ex = new RedisNodeNotFoundException("Node for slot: " + source.getSlot() + " hasn't been discovered yet. Check cluster slots coverage using CLUSTER NODES command. Increase value of retryAttempts and/or retryInterval settings.");
         } else {
             ex = new RedisNodeNotFoundException("Node: " + source + " hasn't been discovered yet. Increase value of retryAttempts and/or retryInterval settings.");