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Posted to mapreduce-dev@hadoop.apache.org by "Josh Wills (JIRA)" <ji...@apache.org> on 2011/07/05 17:18:16 UTC

[jira] [Created] (MAPREDUCE-2642) Fix two bugs in v2.app.speculate.DataStatistics

Fix two bugs in v2.app.speculate.DataStatistics
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                 Key: MAPREDUCE-2642
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2642
             Project: Hadoop Map/Reduce
          Issue Type: Sub-task
          Components: mrv2
            Reporter: Josh Wills
            Assignee: Josh Wills
            Priority: Minor


Fixes two bugs in DataStatistics: a divide by zero in the variance calculation when count == 0, and a synchronization issue in how the updateStatistics method was implemented.

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[jira] [Resolved] (MAPREDUCE-2642) Fix two bugs in v2.app.speculate.DataStatistics

Posted by "Arun C Murthy (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/MAPREDUCE-2642?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Arun C Murthy resolved MAPREDUCE-2642.
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    Resolution: Fixed

I just committed this. Thanks Josh!

> Fix two bugs in v2.app.speculate.DataStatistics
> -----------------------------------------------
>
>                 Key: MAPREDUCE-2642
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2642
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          Components: mrv2
>            Reporter: Josh Wills
>            Assignee: Josh Wills
>            Priority: Minor
>         Attachments: MAPREDUCE-2642.patch, MR-2642-1.patch
>
>
> Fixes two bugs in DataStatistics: a divide by zero in the variance calculation when count == 0, and a synchronization issue in how the updateStatistics method was implemented.

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