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https://issues.apache.org/jira/browse/MAPREDUCE-3471?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bhallamudi Venkata Siva Kamesh updated MAPREDUCE-3471:
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Attachment: MAPREDUCE-3471.patch
I encountered the importance of *NullOutputCommitter*, when I was debugging
[MAPREDUCE-3130|https://issues.apache.org/jira/browse/MAPREDUCE-3130]. I fixed
this by setting *OutputCommitter* class of FileOutputFormat as
*NullOutputCommitter*. Again for setting this, we need to fix
[MAPREDUCE-2493|https://issues.apache.org/jira/browse/MAPREDUCE-2493].
Also, OC implementation of NOF returns true for isRecoverySupported(). Why do
we need this?
Providing patch, thinking it may be useful.
> Provide NullOutputCommitter
> ---------------------------
>
> Key: MAPREDUCE-3471
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3471
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Reporter: Bhallamudi Venkata Siva Kamesh
> Attachments: MAPREDUCE-3471.patch
>
>
> Hadoop by default provides only FileOutputCommitter and the same has been
> used internally except in the NOF.
> There are cases where using FOC is not much appropriate.
> Example
> DBOutputFormat instantiates FOC, though it does nothing.
> I think using NOC will be much more appropriate here.
> And also it can be used along with other OFs, where taking special care of
> the task/job output directories may not be required.
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