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https://issues.apache.org/jira/browse/HADOOP-1549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12590130#action_12590130
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Raghu Angadi commented on HADOOP-1549:
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> A problem seems to be related with hadoop-12-dfs-dir.tgz.
This test changes the format of the namespace image on the disk. So it needs to
handle upgrade of older images. TestDFSUpgradeFromImage test upgrade from
hadoop 0.12 to current version which we need to support.
> 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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