The ZK documentation says:
New in 3.2: Enables a ZooKeeper ensemble administrator to access the znode 
hierarchy as a "super" user. In particular no ACL checking occurs for a user 
authenticated as super.

However, in some testing today I created a digest user, logged in as this user, 
set the ACLs for "/" to Ids.READ_ACL_UNSAFE, and now even when I am logged in 
as the superuser, I cannot actually change this ACL or write nodes below it on 
the tree. So it does not actually seem to be the case that "super" skips ACL 
checks. Is this a bug or a feature?


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