[jira] Assigned: (HADOOP-5850) map/reduce doesn't run jobs with 0 maps

["Vinod K V (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-5850?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vinod K V reassigned HADOOP-5850:
---------------------------------

    Assignee: Vinod K V

> map/reduce doesn't run jobs with 0 maps
> ---------------------------------------
>
>                 Key: HADOOP-5850
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5850
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.20.0
>            Reporter: Owen O'Malley
>            Assignee: Vinod K V
>            Priority: Critical
>             Fix For: 0.20.1
>
>
> Currently, the framework ignores jobs that have 0 maps. This is incorrect. Many pipelines need the job to run (if nothing else, to create the output directory!) so that subsequent jobs don't fail. Effectively, there will be no map tasks and the reduce tasks should immediately set up the Reducer and RecordWriter and then call close on both since there are no inputs to the reduce. I believe it should just work if we remove the check...

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.