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https://issues.apache.org/jira/browse/HADOOP-1335?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Owen O'Malley resolved HADOOP-1335.
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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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