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https://issues.apache.org/jira/browse/HADOOP-5657?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12700023#action_12700023
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Devaraj Das commented on HADOOP-5657:
-------------------------------------
It'd help code readability if some comments are added on why two values are
emitted per map and the logic the testcase is employing for validation (verbose
comments for the arithmetic is what I mean *smile*).
> Validate data passed through TestReduceFetch
> --------------------------------------------
>
> Key: HADOOP-5657
> URL: https://issues.apache.org/jira/browse/HADOOP-5657
> Project: Hadoop Core
> Issue Type: Improvement
> Components: mapred, test
> Reporter: Chris Douglas
> Assignee: Chris Douglas
> Priority: Minor
> Attachments: 5657-0.patch, 5657-1.patch
>
>
> While TestReduceFetch verifies the reduce semantics for reducing from
> in-memory segments, it does not validate the data it reads. Data corrupted
> during the merge will not be detected.
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