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From "Devaraj K (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (MAPREDUCE-5708) Duplicate String.format in YarnOutputFiles.getSpillFileForWrite
Date Thu, 14 May 2015 16:18:00 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-5708?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Devaraj K reassigned MAPREDUCE-5708:
------------------------------------

    Assignee: Konstantin Weitz

> Duplicate String.format in YarnOutputFiles.getSpillFileForWrite
> ---------------------------------------------------------------
>
>                 Key: MAPREDUCE-5708
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5708
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Konstantin Weitz
>            Assignee: Konstantin Weitz
>            Priority: Minor
>              Labels: BB2015-05-TBR
>         Attachments: 0001-Removed-duplicate-String.format.patch
>
>   Original Estimate: 10m
>  Remaining Estimate: 10m
>
> The code responsible for formatting the spill file name (namely _getSpillFileForWrite_)
unnecessarily calls _String.format_ twice. This does not only affect performance, but leads
to the weird requirement that task attempt ids cannot contain _%_ characters (because these
would be interpreted as format specifiers in the outside _String.format_ call).
> I assume this was done by mistake, as it could only be useful if task attempt ids contained
_%n_.



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