Patrick Hunt commented on ZOOKEEPER-472:

Hi, what's the status on this JIRA? I'd like to get it reviewed/committed if 
it's ready. (you need to "submit patch", I would do it, but I can't as you've 
marked it as "in progress")

we use 4 spaces, for some reason hadoop mr/hdfs uses 2 but we use 4 (you should 
see this used throughout our code)


> Making DataNode not instantiate a HashMap when the node is ephmeral
> -------------------------------------------------------------------
>                 Key: ZOOKEEPER-472
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-472
>             Project: Zookeeper
>          Issue Type: Improvement
>          Components: server
>    Affects Versions: 3.1.1, 3.2.0
>            Reporter: Erik Holstad
>            Assignee: Erik Holstad
>            Priority: Minor
>             Fix For: 3.3.0
>         Attachments: zookeeper-472.patch
> Looking at the code, there is an overhead of a HashSet object for that nodes 
> children, even though the node might be an ephmeral node and cannot have 
> children.

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