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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HADOOP-1335) C++ reducers under hadoop-pipes are not started when there are no key-value pairs to be reduced
Date Thu, 17 May 2007 21:00:19 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-1335?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Owen O'Malley resolved HADOOP-1335.
-----------------------------------

       Resolution: Fixed
    Fix Version/s: 0.14.0
         Assignee: Owen O'Malley

This was rolled into the patch for HADOOP-234.

> C++ reducers under hadoop-pipes are not started when there are no key-value pairs to
be reduced
> -----------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-1335
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1335
>             Project: Hadoop
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.12.3
>            Reporter: Christian Kunz
>         Assigned To: Owen O'Malley
>             Fix For: 0.14.0
>
>
> Probably originally thought as a feature, Hadoop-Pipes does not start  a C++ reducer
application when there are no key-values to be processed. Unfortunately, this does not allow
to have certain common tasks performed by every reducer independent of key-value pairs. This
is a requirement for our applications.

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