Michael Han commented on ZOOKEEPER-2014:

Nudge nudge - anyone has cycles to take a look at the patch and provide 
cc [~shralex], [~rgs], [~fpj], [~phunt] 

> Only admin should be allowed to reconfig a cluster
> --------------------------------------------------
>                 Key: ZOOKEEPER-2014
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2014
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: server
>    Affects Versions: 3.5.0
>            Reporter: Raul Gutierrez Segales
>            Assignee: Michael Han
>            Priority: Blocker
>             Fix For: 3.5.3
>         Attachments: ZOOKEEPER-2014.patch, ZOOKEEPER-2014.patch, 
> ZOOKEEPER-2014.patch, ZOOKEEPER-2014.patch
> ZOOKEEPER-107 introduces reconfiguration support via the reconfig() call. We 
> should, at the very least, ensure that only the Admin can reconfigure a 
> cluster. Perhaps restricting access to /zookeeper/config as well, though this 
> is debatable. Surely one could ensure Admin only access via an ACL, but that 
> would leave everyone who doesn't use ACLs unprotected. We could also force a 
> default ACL to make it a bit more consistent (maybe).
> Finally, making reconfig() only available to Admins means they have to run 
> with zookeeper.DigestAuthenticationProvider.superDigest (which I am not sure 
> if everyone does, or how would it work with other authentication providers). 
> Review board https://reviews.apache.org/r/51546/

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