merlimat opened a new pull request #11925:
URL: https://github.com/apache/pulsar/pull/11925


   ### Motivation
   
   When creating intermediate nodes in ZooKeeper we can mark them as 
"container" nodes. This is a new type introduced in ZK 3.5 that will ensure 
these nodes will get auto-deleted when the last child is deleted (the cleanup 
is done periodically).
   
   This will allow to do proper cleanup of directory structures in ZK even in 
presence of failures.
   
   We cannot immediately remove the existing logics that try to manually get 
rid of them, since for existing clusters these nodes would not get auto-deleted.


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