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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-1459) FileSystem.getFileCacheHints returns IP addresses rather than hostnames, which breaks 'data-locality' in map-reduce
Date Mon, 18 Jun 2007 20:41:26 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-1459?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Doug Cutting updated HADOOP-1459:
---------------------------------

    Resolution: Fixed
        Status: Resolved  (was: Patch Available)

I just committed this.  Thanks, Dhruba!

> 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: getHintsIpAddress2.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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