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https://issues.apache.org/jira/browse/ZOOKEEPER-2779?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16029695#comment-16029695
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Michael Han commented on ZOOKEEPER-2779:
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>From a security perspective, offline configuration is better than online
>configuration for security related features as offline configuration
>eliminates possible attack window comparing to online configuration. The "only
>admin can reconfig a cluster" approach is offline configuration and thus
>should be the default option. As I said, I am OK with this PR merged in but
>I'd like to not advertise the approach in PR is the default, or a safer
>option, because it is essentially online configuration and not all users may
>have automated scripts like yours.
> Add option to not set ACL for reconfig node
> -------------------------------------------
>
> Key: ZOOKEEPER-2779
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2779
> Project: ZooKeeper
> Issue Type: Improvement
> Components: server
> Affects Versions: 3.5.3
> Reporter: Jordan Zimmerman
> Assignee: Jordan Zimmerman
> Fix For: 3.5.4, 3.6.0
>
>
> ZOOKEEPER-2014 changed the behavior of the /zookeeper/config node by setting
> the ACL to {{ZooDefs.Ids.READ_ACL_UNSAFE}}. This change makes it very
> cumbersome to use the reconfig APIs. It also, perversely, makes security
> worse as the entire ZooKeeper instance must be opened to "super" user while
> enabled reconfig (per {{ReconfigExceptionTest.java}}). Provide a mechanism
> for savvy users to disable this ACL so that an application-specific custom
> ACL can be set.
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