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Posted to common-dev@hadoop.apache.org by "dhruba borthakur (JIRA)" <ji...@apache.org> on 2007/06/08 08:34:26 UTC

[jira] Assigned: (HADOOP-1459) FileSystem.getFileCacheHints returns IP addresses rather than hostnames, which breaks 'data-locality' in map-reduce

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

dhruba borthakur reassigned HADOOP-1459:
----------------------------------------

    Assignee: dhruba borthakur

> 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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