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From "Lars Grote (JIRA)" <>
Subject [jira] [Commented] (MRUNIT-198) Serialization is missing in MockMultipleOutputs
Date Sat, 22 Feb 2014 12:29:19 GMT


Lars Grote commented on MRUNIT-198:


> Serialization is missing in MockMultipleOutputs
> -----------------------------------------------
>                 Key: MRUNIT-198
>                 URL:
>             Project: MRUnit
>          Issue Type: Bug
>    Affects Versions: 1.1.0
>            Reporter: Lars Grote
>             Fix For: 1.1.0
>         Attachments: MRUNIT-198-1.patch, MRUNIT-198.patch
> Hi, 
> with issue MRUNIT-13 MockMultipleOutputs was introduced. Which is great! Unfortunately
the inner class MockRecordWriter doesn't serialize the Object and therefore isn't storing
a copy of the Object but the Object itself. I would suggest to use org.apache.hadoop.mrunit.internal.output.MockOutputCollector
instead of the inner class. This Collector does store a copy of the Object and I see no point
in having more or less the same Collector/Writer twice. 
> Another thing that bugs me, is that MockMultipleOutputs requires you to use Comparable
Objects in your MR Jobs, and I don't see for what reason this restriction is imposed on me.
> I'll provide a patch for this soon and would be glad if someone can comment on it. 
> Cheers, Lars 

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