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https://issues.apache.org/jira/browse/ZOOKEEPER-1587?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13503322#comment-13503322
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Todd Lipcon commented on ZOOKEEPER-1587:
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Sure - and most apps do. But, in many cases, it's stored in some kind of 
encoded form which isn't straight-forward to decode when you're an operator 
sitting at the shell. (eg several apps store the data using protobuf or thrift)
                
> Provide simple way to determine IP address of an ephemeral znode's owner
> ------------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-1587
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1587
>             Project: ZooKeeper
>          Issue Type: Improvement
>    Affects Versions: 3.4.3
>            Reporter: Todd Lipcon
>
> Occasionally I've run into operational cases where an ephemeral znode exists, 
> and is held by some client, but it's not clear which client is the holder. By 
> getting the znode from the shell, one can find the session ID, but as far as 
> I'm aware the only way to reverse that to an IP is by grepping logs, etc.

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