BewareMyPower commented on issue #12616:
URL: https://github.com/apache/pulsar/issues/12616#issuecomment-966757036


   @Jason918 
   
   I tried to modify my test to
   
   ```java
           managedLedger.getConfig().setRetentionTime(0, TimeUnit.MILLISECONDS);
           managedLedger.rollCurrentLedgerIfFull(); // the rollover is 
asynchronous
   
           // unload and load
           admin.topics().unload(topic);
           Thread.sleep(2000);
           admin.lookups().lookupTopic(topic);
   
           final ManagedLedgerImpl managedLedger2 = 
pulsar.getBrokerService().getTopicIfExists(partitionName).get()
                   .map(topicObject -> (ManagedLedgerImpl) ((PersistentTopic) 
topicObject).getManagedLedger())
                   .orElse(null);
           assertNotNull(managedLedger2);
   
           final List<LedgerInfo> ledgerInfoList2 = 
managedLedger2.getLedgersInfoAsList();
           final Position lastConfirmedEntry2 = 
managedLedger2.getLastConfirmedEntry();
   ```
   
   The `lastConfirmedEntry` didn't change. At the same time, instead of 
removing old ledgers, after `unload` and `lookup` again, the old ledgers were 
not removed.


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