[GitHub] [pulsar] codelipenghui commented on a change in pull request #5716: [Issues 5709]remove the namespace checking

[GitBox <gi...@apache.org>]

codelipenghui commented on a change in pull request #5716: [Issues 5709]remove the namespace checking
URL: https://github.com/apache/pulsar/pull/5716#discussion_r355127233
 
 

 ##########
 File path: pulsar-client/src/main/java/org/apache/pulsar/client/impl/MultiTopicsConsumerImpl.java
 ##########
 @@ -180,27 +180,18 @@
 
     // Check topics are valid.
     // - each topic is valid,
-    // - every topic has same namespace,
     // - topic names are unique.
     private static boolean topicNamesValid(Collection<String> topics) {
         checkState(topics != null && topics.size() >= 1,
             "topics should contain more than 1 topic");
 
-        final String namespace = TopicName.get(topics.stream().findFirst().get()).getNamespace();
-
         Optional<String> result = topics.stream()
             .filter(topic -> {
                 boolean topicInvalid = !TopicName.isValid(topic);
                 if (topicInvalid) {
                     return true;
                 }
-
-                String newNamespace =  TopicName.get(topic).getNamespace();
-                if (!namespace.equals(newNamespace)) {
-                    return true;
-                } else {
-                    return false;
-                }
+                return false;
 
 Review comment:
   Can simplify by 
   ```
   topic -> !TopicName.isValid(topic)
   ```

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