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Posted to mapreduce-issues@hadoop.apache.org by "Allen Wittenauer (JIRA)" <ji...@apache.org> on 2015/03/10 03:59:38 UTC
[jira] [Resolved] (MAPREDUCE-2042) InputFormat#getSplits() is
called twice in local mode
[ https://issues.apache.org/jira/browse/MAPREDUCE-2042?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Allen Wittenauer resolved MAPREDUCE-2042.
-----------------------------------------
Resolution: Unresolved
stale
> InputFormat#getSplits() is called twice in local mode
> -----------------------------------------------------
>
> Key: MAPREDUCE-2042
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2042
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: job submission
> Affects Versions: 0.20.1, 0.20.2
> Reporter: Johannes Zillmann
> Attachments: MAPREDUCE-2042.patch
>
>
> In local mode the InputFormat#getSplits() is called twice in local mode.
> - 1st time: JobClient#writeOld/NewSplits() (then they write the splits to disk )
> - 2nd time: LocalJobRunner#run() (instead of reading the split file )
> That can become annoying in case the InputFormat access external resources or takes a little longer to create the splits.
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