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https://issues.apache.org/jira/browse/HDFS-6690?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14062922#comment-14062922
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Charles Lamb commented on HDFS-6690:
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I thought the general java style/coding standard for collections was to declare
the abstract type and initialize to the concrete type.
> Deduplicate xattr names in memory
> ---------------------------------
>
> Key: HDFS-6690
> URL: https://issues.apache.org/jira/browse/HDFS-6690
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Affects Versions: 2.5.0
> Reporter: Andrew Wang
> Assignee: Andrew Wang
> Attachments: hdfs-6690.001.patch
>
>
> When the same string is used repeatedly for an xattr name, we could
> potentially save some NN memory by deduplicating the strings.
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