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From "Suneel Marthi (JIRA)" <>
Subject [jira] [Commented] (MAHOUT-1284) DummyRecordWriter's bug with reused Writables
Date Sat, 27 Jul 2013 19:43:48 GMT


Suneel Marthi commented on MAHOUT-1284:

What has changed in this patch? I see no difference between the latest patch and the previous
one, the integration tests still fail with this patch.
> DummyRecordWriter's bug with reused Writables
> ---------------------------------------------
>                 Key: MAHOUT-1284
>                 URL:
>             Project: Mahout
>          Issue Type: Bug
>    Affects Versions: 0.7, 0.8
>            Reporter: Maysam Yabandeh
>            Assignee: Suneel Marthi
>            Priority: Minor
>              Labels: test
>             Fix For: 0.9
>         Attachments: MAHOUT-1284.patch, MAHOUT-1284.patch
>   Original Estimate: 1h
>  Remaining Estimate: 1h
> It is a recommended practice to reuse the Writable objects. DummyRecordWriter, which
is used for testing in Mahout, however keeps the same Writable instance in a map: next time
that the user reuses the Writable object, the internal map of DummyRecordWriter changes as
well. This makes DummyRecordWriter fail for testing the MapReduce jobs that reuse the Writables.

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