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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-5186) mapreduce.job.max.split.locations causes some splits created by CombineFileInputFormat to fail
Date Mon, 11 Nov 2013 19:31:19 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-5186?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jason Lowe updated MAPREDUCE-5186:
----------------------------------

       Resolution: Fixed
    Fix Version/s: 2.3.0
                   3.0.0
     Hadoop Flags: Reviewed
           Status: Resolved  (was: Patch Available)

Thanks Rob for the contribution, and thanks Sangjin and Daryn for reviews.  I committed this
to trunk and branch-2.

> mapreduce.job.max.split.locations causes some splits created by CombineFileInputFormat
to fail
> ----------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5186
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5186
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: job submission
>    Affects Versions: 2.0.4-alpha, 2.2.0
>            Reporter: Sangjin Lee
>            Assignee: Robert Parker
>            Priority: Critical
>             Fix For: 3.0.0, 2.3.0
>
>         Attachments: MAPREDUCE-5186v1.patch, MAPREDUCE-5186v2.patch, MAPREDUCE-5186v3.patch,
MAPREDUCE-5186v3.patch
>
>
> CombineFileInputFormat can easily create splits that can come from many different locations
(during the last pass of creating "global" splits). However, we observe that this often runs
afoul of the mapreduce.job.max.split.locations check that's done by JobSplitWriter.
> The default value for mapreduce.job.max.split.locations is 10, and with any decent size
cluster, CombineFileInputFormat creates splits that are well above this limit.



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