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https://issues.apache.org/jira/browse/HADOOP-11812?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14503458#comment-14503458
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Gera Shegalov commented on HADOOP-11812:
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[~cnauroth], yes, unfortunately I had to undo [~laurentgo]'s suggestion because
it required that unchecked cast. The method does not quite do what is expected
by this pattern for the "file" case: in-class is the same as out-class. In the
end, I was basically choosing between two alternatives: the one from 003 and
the one from 004. They both required just one cast, but 004's is unchecked with
a new warning.
> Implement listLocatedStatus for ViewFileSystem to speed up split calculation
> ----------------------------------------------------------------------------
>
> Key: HADOOP-11812
> URL: https://issues.apache.org/jira/browse/HADOOP-11812
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs
> Affects Versions: 2.7.0
> Reporter: Gera Shegalov
> Assignee: Gera Shegalov
> Priority: Blocker
> Labels: performance
> Attachments: HADOOP-11812.001.patch, HADOOP-11812.002.patch,
> HADOOP-11812.003.patch, HADOOP-11812.004.patch, HADOOP-11812.005.patch
>
>
> ViewFileSystem is currently not taking advantage of MAPREDUCE-1981. This
> causes several x of RPC overhead and added latency.
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