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Posted to dev@mahout.apache.org by "Sebastian Schelter (JIRA)" <ji...@apache.org> on 2013/07/29 07:57:49 UTC

[jira] [Reopened] (MAHOUT-1284) DummyRecordWriter's bug with reused Writables

     [ https://issues.apache.org/jira/browse/MAHOUT-1284?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sebastian Schelter reopened MAHOUT-1284:
----------------------------------------


The committed patch causes TestCanopyCreation to fail.
                
> DummyRecordWriter's bug with reused Writables
> ---------------------------------------------
>
>                 Key: MAHOUT-1284
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1284
>             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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