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Posted to mapreduce-issues@hadoop.apache.org by "Jason Lowe (JIRA)" <ji...@apache.org> on 2014/02/14 00:16:21 UTC

[jira] [Commented] (MAPREDUCE-5670) CombineFileRecordReader should report progress when moving to the next file

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5670?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13900863#comment-13900863 ] 

Jason Lowe commented on MAPREDUCE-5670:
---------------------------------------

+1 lgtm.  Committing this.

> CombineFileRecordReader should report progress when moving to the next file
> ---------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5670
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5670
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.9
>            Reporter: Jason Lowe
>            Assignee: Chen He
>            Priority: Minor
>         Attachments: MR-5670v3.patch
>
>
> If a combine split consists of many "empty" files (i.e.: no record found by the underlying record reader) then theoretically a task can timeout due to lack of reported progress.



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