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https://issues.apache.org/jira/browse/MAHOUT-1284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13721273#comment-13721273
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Suneel Marthi commented on MAHOUT-1284:
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[~maysamyabandeh] Got time to look at this today. There are tests in
Mahout-integration that are using DummyRecordWriter -
TestConcatenateVectorsJob and RegexMapperTest, and are failing with this patch.
I'll take a stab at this again but could you verify this patch against the
present trunk?
> 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
>
> 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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