eolivelli commented on issue #12727:
URL: https://github.com/apache/pulsar/issues/12727#issuecomment-965192551


   I have found a "workaround", basically the thing that triggers this problem 
is a tool that I have that lists all the topics and for each topic calls 
getSubscriptions:
   
   ```
   List<String> allTopics = pulsarAdmin.topics().getList(systemNamespace);
   for (String topic : allTopics) {
            
             log.info("Scanning topic {}", topic);
             List<String> subscriptions = 
pulsarAdmin.topics().getSubscriptions(topic);
   }
   ```
   
   if you run this loop many times you will see this problem.
   
   so my understanding is that  `getSubscriptions` is creating those system 
topics even for system subscriptions


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