DaanHoogland commented on code in PR #6781:
URL: https://github.com/apache/cloudstack/pull/6781#discussion_r996963085


##########
server/src/main/java/com/cloud/network/NetworkServiceImpl.java:
##########
@@ -4697,6 +4709,13 @@ public PhysicalNetworkTrafficType 
addTrafficTypeToPhysicalNetwork(Long physicalN
             }
         }
 
+        // Check if there are more than 1 physical network with null tags in 
same traffic type.
+        // If so then dont allow to add traffic type.
+        List<String> tags = network.getTags();
+        if (tags == null || tags.size() == 0) {

Review Comment:
   ```suggestion
               CollectionUtils.isEmpty(tags) {
   ```



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