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https://issues.apache.org/jira/browse/HADOOP-1549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12590232#action_12590232
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Edward J. Yoon commented on HADOOP-1549:
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Thanks for advice, raghu and konstantin.
{quote}So I recommend just to remove UTF8 for everything but the storage
classes, like Storage, FSImage, FSEditLog, DataStorage. {quote}
I see. Then, Is there no necessity for upgrade of older image? or Should we
keep old image for version migration?
> All remaining UTF8 data structures in HDFS code should be removed
> -----------------------------------------------------------------
>
> Key: HADOOP-1549
> URL: https://issues.apache.org/jira/browse/HADOOP-1549
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Reporter: dhruba borthakur
> Assignee: Edward J. Yoon
> Fix For: 0.18.0
>
> Attachments: 1549.patch
>
>
> The UTF8 data structure is deprecated. HADOOP-1283 addressed part of the
> problem. All remaining UTF8 data structurs in HDFS should be removed.
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