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From "Amir Youssefi (JIRA)" <j...@apache.org>
Subject [jira] Issue Comment Edited: (HADOOP-3973) Breaking out of a task
Date Wed, 20 Aug 2008 10:56:47 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3973?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12623955#action_12623955
] 

amirhyoussefi edited comment on HADOOP-3973 at 8/20/08 3:54 AM:
----------------------------------------------------------------

Also another way of preventing changing signature of map() is to have an extended IOException
exception, detect it in caller and if not  made for breaking (not made by us) re-throw IOException.
This handles the case in which IOException is throws for other reasons.

      was (Author: amirhyoussefi):
    Also another way of preventing changing signature of map() is 

  
> Breaking out of a task
> ----------------------
>
>                 Key: HADOOP-3973
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3973
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: mapred
>            Reporter: Amir Youssefi
>
> Occasionally a mapper/reducer is done without need to see more input data. If we provide
a way to break out and skip reading the rest of input then job finishs earlier and resources
are spared.

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