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https://issues.apache.org/jira/browse/HADOOP-1459?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12503702
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Konstantin Shvachko commented on HADOOP-1459:
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Protocol version should be changed any time the protocol is changing, which is
what this patch does.
> FileSystem.getFileCacheHints returns IP addresses rather than hostnames,
> which breaks 'data-locality' in map-reduce
> -------------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-1459
> URL: https://issues.apache.org/jira/browse/HADOOP-1459
> Project: Hadoop
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.14.0
> Reporter: Arun C Murthy
> Assignee: dhruba borthakur
> Priority: Blocker
> Fix For: 0.14.0
>
> Attachments: getHintsIpAddress.patch
>
>
> FileSystem.getFileCacheHints via DFSClient.getHints (post HADOOP-894?)
> returns IP address of the datanodes instead of the hostnames which breaks
> mapping from task-tracker to datanodes in map-reduce i.e. the system cannot
> intelligently place maps on datanodes where blocks are present.
> I have verified that this affects trunk only, branch-0.13.0 seems ok.
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