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https://issues.apache.org/jira/browse/HDFS-6690?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Wang updated HDFS-6690:
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Attachment: hdfs-6690.003.patch
I chatted with Colin a bit offline, and we agreed that adding some docs about
holding the FSDirectory lock is sufficient here. New patch adds these to the
method javadocs.
I also looked at the above test failures, they look unrelated.
> 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, hdfs-6690.002.patch,
> hdfs-6690.003.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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